AIRS and AMSU: Trace Gases (CO2, CO, CH4, O3...); Level 3
AIRS provides satellite retrieval of mid-tropospheric carbon dioxide even under cloudy conditions, without the use of a priori information from models. AIRS retrievals use cloud-cleared thermal IR radiance spectra in the 15 micron band with an accuracy better than 2 ppm. AIRS retrievals have been...
Main variables and Earth System components:
Formats: netCDF | HDF-EOS
Timestep: Sub-daily,Daily,Monthly
Domain: Global
AIRS and AMSU: Tropospheric air temperature and specific humidity
Years of Record: 2002/09 to 2011/05
The Atmospheric Infrared Sounder (AIRS) project has generated decadal-length,
global, gridded data sets of temperature and specific humidity for several standard
levels in the troposphere for the obs4MIPS project. This obs4MIPS version of the
AIRS data are available at monthly resolution, 1ºx1º...
Main variables and Earth System components:
Formats: netCDF
Timestep: Monthly
Domain: Global
Arctic System Reanalysis (ASR)
Years of Record: 2000/01 to 2012/12
The Arctic System Reanalysis is a multi-agency, university-led retrospective analysis (reanalysis) of the Greater Arctic. ASR is produced using high-resolution versions of the Polar Weather Forecast Model (PWRF) and the WRF-VAR and High Resolution Land Data Assimilation (HRLDAS) data assimilation...
Main variables and Earth System components:
Formats: netCDF
Timestep: Sub-daily,Monthly
Domain: Arctic
Argo Ocean Temperature and Salinity Profiles
Years of Record: 2000/01 to 2017/01
Argo is an array of over 3600 profiling floats distributed almost uniformly across the global oceans. First deployed in 2000, Argo floats provide temperature and salinity profiles from the surface to a depth of 2000m. The array has approximately 1 float for every 3 degrees of latitude and...
Main variables and Earth System components:
Formats: netCDF
Timestep: Monthly,Weekly
Domain: Global
Atlantic Multi-decadal Oscillation (AMO)
Years of Record: 1856/01 to 2016/07
The Atlantic Multi-decadal Oscillation (AMO) has been identified as a coherent mode of natural variability occurring in the North Atlantic Ocean with an estimated period of 60-80 years. It is based upon the average anomalies of sea surface temperatures (SST) in the North Atlantic basin, typically...
Main variables and Earth System components:
Formats: netCDF | ascii
Timestep: Monthly
Domain: Atlantic Ocean, NH - Northern Hemisphere
AVISO: Satellite derived Sea Surface Height above Geoid
Years of Record: 1992/10 to 2010/12
The sea surface height relative to the geoid (the mean ocean surface of the Earth if the ocean is at rest) is derived from TOPEX/Poseidon, Envisat, Jason-1, and OSTM/Jason-2 altimetry measurements. Altimetry is a technique for measuring height. Satellite altimetry measures the time taken by a radar...
Main variables and Earth System components:
Formats: netCDF
Timestep: Monthly
Domain: Global
CALIPSO
Years of Record: 2006/06 to 2017/01
CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations ) was launched on April 28, 2006 to study the impact of clouds and aerosols on the Earth's radiation budget and climate. It flies in formation with five other satellites in the international "A-Train" constellation for...
Main variables and Earth System components:
Formats: netCDF
Timestep: Sub-daily,Daily
Domain: Global
CCMP: Cross-Calibrated Multi-Platform wind vector analysis
Years of Record: 1987/07 to 2016/05
The CCMP wind analysis is a near-global, high spatial and temporal resolution gridded dataset of surface wind vectors spanning 1987-present. The input data are a combination of inter-calibrated satellite data from numerous radiometers and scatterometers and in-situ data from moored buoys....
Main variables and Earth System components:
Formats: netCDF
Timestep: Sub-daily
Domain: Global
CERA-20C: ECMWF's Coupled Ocean-Atmosphere Reanalysis of the 20th Century
Years of Record: 1901/01 to 2010/12
The CERA-20C is a global, coupled reanalysis spanning 1901-2010 with a focus on low-frequency climate variability. Similar to ERA-20C, the surface observations assimilated include surface pressures from the International Surface Pressure Databank v3.2.6 and ICOADS v 2.5.1, and surface winds...
Main variables and Earth System components:
Formats: netCDF | GRIB
Timestep: Sub-daily,Daily,Monthly
Domain: Global
CERES: IGBP Land Classification
The International Geosphere–Biosphere Programme (IGBP) defines ecosystems surface classifications. The CERES (Clouds and Earth's Radiant Energy System)10-minute data can be used to derive the land categories. Other, finer resolution gridded surface data are available.
Main variables and Earth System components:
Formats: netCDF | binary
Timestep: Climatology
Domain: Global
CLARA-A1: Cloud properties, surface albedo and surface radiation products based on AVHRR
Years of Record: 1982/01 to 2009/12
"CLARA-A1 (CLoud, Albedo and RAdiation dataset, AVHRR-based, version 1) is a global dataset of cloud properties, surface albedo and surface radiation products, generated by the EUMETSAT Satellite Application Facility on Climate Monitoring (CM SAF). The products are derived from measurements of the...
Main variables and Earth System components:
Formats: netCDF
Timestep: Daily,Monthly,Pentad
Domain: Global
Cloud observations from MODIS
Years of Record: 2000/03 to 2018/05
The Moderate Resolution Imaging Spectroradiometer (MODIS) is scanning instrument that makes measurements in 36 spectral bands from the visible to the thermal infrared at spatial resolutions from 250 m to 1 km. There are MODIS instruments aboard two sun-synchronous polar-orbiting NASA satellites:...
Main variables and Earth System components:
Formats: netCDF | HDF-EOS
Timestep: Daily,Monthly,Weekly
Domain: Global
CloudSat
Years of Record: 2006/06 to 2010/11
CloudSat is a satellite mission designed to measure the vertical structure of clouds from space. The radar data produces detailed images of cloud structures.
CloudSat is one of a constellation of satellites known as the A-Train (Cloudsat, CALIPSO, PARASOL, Aqua, Aura, GCOM-W1). The satellites fly...
Main variables and Earth System components:
Formats: netCDF
Timestep: Monthly
Domain: Global
CMAP: CPC Merged Analysis of Precipitation
Years of Record: 1979/01 to 2019/09
CMAP refers to a collection of precipitation data sets, though the 2.5°x2.5° global monthly version is probably the most widely used. This data set is constructed from an analysis of gauge data and satellite-derived precipitation estimates. An "enhanced" version (CMAP/A) is also available, which...
Main variables and Earth System components:
Formats: netCDF | ascii
Timestep: Monthly,Pentad
Domain: Global
CMCC Global Ocean Reanalysis System (C-GLORS)
Years of Record: 1982/01 to 2013/12
"The CMCC Global Ocean Physical Reanalysis System (C-GLORS) is used to simulate the state of the ocean in the last decades. It consists of a variational data assimilation system (OceanVar), capable of assimilating all in-situ observations along with altimetry data, and a forecast step...
Main variables and Earth System components:
Formats: netCDF
Timestep: Daily,Monthly,Weekly
Domain: Global
CMORPH (CPC MORPHing technique): High resolution precipitation (60S-60N)
Years of Record: 2002/12 to 2017/10
"CMORPH (CPC MORPHing technique) produces global precipitation analyses at very high spatial and temporal resolution. This technique uses precipitation estimates that have been derived from low orbiter satellite microwave observations exclusively, and whose features are transported via spatial...
Main variables and Earth System components:
Formats: netCDF | binary
Timestep: Sub-daily,Daily
Domain: Global
Combined CloudSat spaceborne radar and CALIPSO spaceborne lidar cloud fraction dataset
Years of Record: 2006/07 to 2011/02
A global (82S-82N) cloud fraction data set, providing a unique view of cloud vertical structure, has been developed based on the complimentary spaceborne remote sensing capabilities of the CloudSat radar and the CALISPSO lidar. The data set provides monthly mean cloud fraction over several vertical...
Main variables and Earth System components:
Formats: netCDF
Timestep: Monthly,Seasonal,Annual
Domain: Global
COREv2 Air-Sea Surface Fluxes
Years of Record: 1949/01 to 2006/12
The Coordinated Ocean Research Experiments version 2 (COREv2) data set consists of a globally complete set of air-sea fluxes of momentum, heat and freshwater for 1948-2009 at monthly resolution. This data set serves as a set of common atmospheric boundary conditions that has been used...
Main variables and Earth System components:
Formats: netCDF
Timestep: Monthly
Domain: Global
CoRTAD: Coral Reef Temperature Anomaly Database (SST)
Years of Record: 1985/01 to 2005/12
"The Coral Reef Temperature Anomaly Database (CoRTAD) is a collection of sea surface temperature (SST) and related thermal stress metrics, developed specifically for coral reef ecosystem applications but relevant to other ecosystems as well. In addition to SST, it contains SST anomaly (SSTA,...
Main variables and Earth System components:
Formats: netCDF
Timestep: Weekly
Domain: Global
CRU TS Gridded precipitation and other meteorological variables since 1901
Years of Record: 1901/01 to 2015/12
The CRU TS series of data sets (CRU TS = Climatic Research Unit Timeseries) contain monthly timeseries of precipitation, daily maximum and minimum temperatures, cloud cover, and other variables covering Earth's land areas for 1901-2015 (CRU TS4.0 is a recent release). The data set is gridded to 0....
Main variables and Earth System components:
Formats: netCDF | ascii
Timestep: Climatology,Monthly
Domain: Global
Daymet: Daily Surface Weather and Climatological Summaries
Years of Record: 1980/01 to 2015/12
Developed by Dr. Peter E Thornton to fulfill the need for daily climatological data necessary for plant growth model inputs, Daymet generates daily, gridded surfaces of temperature, precipitation, humidity, and radiation over large regions and takes into account areas of complex terrain.
Main variables and Earth System components:
Formats: netCDF | ascii
Timestep: Climatology,Daily
Domain: North America
Drought atlases from tree rings
Years of Record: 0000/01 to 2005/12
Tree-ring drought atlases provide a paleoclimate analog to modern drought indices, most commonly the Palmer Drought Severity Index (PDSI). Produced on a regular lat-lon grid for regions such as North America, Europe, and Australia, these centuries-long datasets are convenient for comparisons...
Main variables and Earth System components:
Formats: netCDF | ascii
Timestep: Annual
Domain: North America
Earth Radiation Budget Experiment (ERBE): 1985-89
Years of Record: 1985/01 to 1989/12
The Goddard Space Flight Center built the Earth Radiation Budget Satellite (ERBS) on which the first ERBE instruments were launched by the Space Shuttle Challenger in 1984. ERBE instruments were also launched on two National Oceanic and Atmospheric Administration weather monitoring satellites, NOAA...
Main variables and Earth System components:
Formats: netCDF
Timestep: Monthly
Domain: Global
ERA-Interim
Years of Record: 1979/01 to 2019/09
Using a much improved atmospheric model and assimilation system from those used in ERA-40, ERA-Interim represents a third generation reanalysis. Several of the inaccuracies exhibited by ERA-40 such as too-strong precipitation over oceans from the early 1990's onwards and a too-strong Brewer-Dobson...
Main variables and Earth System components:
Formats: netCDF | GRIB
Timestep: Sub-daily,Daily,Monthly
Domain: Global
ERA-Interim: derived components
Years of Record: 1979/01 to 2015/12
Era-Interim data are used to derive monthly mass, moisture and energy budget products. Each term is available.
Atmospheric energy, mass, and moisture budgets can be computed by vertically integrating reanalysis fields and employing suitable corrections (e.g. mass). The budgets are uniquely...
Main variables and Earth System components:
Formats: netCDF
Timestep: Monthly
Domain: Global
ERA40
Years of Record: 1957/09 to 2002/08
ERA 40 is a second generation reanalysis. It is the first reanalysis to directly assimilate satellite radiance data (TOVS, SSM/I, ERS and ATOVS). Cloud Motion Winds are also used. The result is better circulation over the tropics and southern hemisphere. However, unless comparing to previous...
Main variables and Earth System components:
Formats: netCDF | GRIB
Timestep: Sub-daily,Monthly
Domain: Global
ERA5 atmospheric reanalysis
Years of Record: 1979/01 to 2019/08
ERA5, the successor to ERA-Interim, provides global, hourly estimates of atmospheric variables, at a horizontal resolution of 31 km and 137 vertical levels from the surface to 0.01 hPa. Produced by ECMWF, ERA5 presently extends back to 1979; it will ultimately be extended back to 1950. ERA5...
Main variables and Earth System components:
Formats: netCDF | GRIB
Timestep: Sub-daily,Daily,Monthly
Domain: Global
FLUXNET
"FLUXNET is a global network of micrometeorological flux measurement sites that measure the exchanges of carbon dioxide, water vapor, and energy between the biosphere and atmosphere. At present over 140 sites are operating on a long-term and continuous basis. Vegetation under study includes...
Main variables and Earth System components:
Formats: netCDF | ascii
Timestep: Sub-daily
Domain: Global
Freshwater Discharge: 1948-2004
Years of Record: 1948/01 to 2004/12
"A dataset of historical monthly streamflow at the farthest downstream stations for the world’s 925 largest ocean-reaching rivers has been created for community use. Compared with previous studies, the new dataset has improved homogeneity and enables more reliable assessments of decadal and long-...
Main variables and Earth System components:
Formats: netCDF | ascii | binary
Timestep: Monthly
Domain: Global
GHCN (Global Historical Climatology Network) Related Gridded Products
Years of Record: 1870/01 to 2014/05
Long time series of gridded surface temperature and precipitation data derived from homongenized station data. The gridded anomalies were produced from GHCN-M bias corrected data. GHCN data and CAMS (Climate Anomaly Monitoring System) are combined to produce a high resolution 'real-time' product.
Formats: netCDF | ascii
Timestep: Monthly
Domain: Global
GHCNDEX: Gridded Temperature and Precipitation Climate Extremes Indices (CLIMDEX data)
Years of Record: 1951/01 to 2014/02
GHCNDEX provides gridded, station-based indices of temperature- and precipitation- related climate extremes. It is intended for climate change detection and attribution studies, climate model evaluation, and operational monitoring of extreme climatic events. Twenty-six indices, including daily...
Main variables and Earth System components:
Formats: netCDF | ascii
Timestep: Monthly
Domain: Global
Global (land) precipitation and temperature: Willmott & Matsuura, University of Delaware
Years of Record: 1900/01 to 2014/12
A series of gridded temperature and precipitation data sets. Station records that served as bases for the Terrestrial Air Temperature: 1900-2014 Gridded Monthly Time Series (Version 4.01) and Terrestrial Precipitation: 1900-2014 Gridded Monthly Time Series (Version 4.01) archives are used here to...
Main variables and Earth System components:
Formats: netCDF | ascii
Timestep: Climatology,Monthly
Domain: Global
Global Ocean Heat and Thermospheric Sea Level Change
Years of Record: 1955/01 to 2010/12
Using updated data from the World Ocean Database (Boyer et al, 2009) and improved ARGO profiling data, new estimates of ocean heat content and thermospheric sea level change (0-2000m) for the period 1955-2010 are derived.
Main variables and Earth System components:
Formats: netCDF | ascii
Timestep: Monthly,Seasonal,Annual
Domain: Global
Global Ocean Salinity Change, 1950-2008 (Durack-Wijffels)
Years of Record: 1950/01 to 2009/04
Using data from the Indian Ocean Hydrobase (IOHB) (Kobayashi et al., 2006), Hydrobase2 (Curry, 2002), and Southern Ocean Atlas (Orsi and Whitworth, 2010) databases along with the improved spatial and temporal coverage provided by ARGO profiling data, new estimates of ocean salinity and temperature...
Formats: netCDF | Image
Timestep: Climatology
Domain: Global
Global surface temperature data: HadCRUT4 and CRUTEM4
Years of Record: 1850/01 to 2019/09
Extending back to 1850 and frequently updated, HadCRUT4 is the longest data set of its type. HadCRUT4 is a combination of the global land surface temperature data set, CRUTEM4 and the global SST data set, HadSST3. HadCRUT4 is different from the most closely comparable products (e.g. NASA GISTEMP...
Main variables and Earth System components:
Formats: netCDF | ascii | KML
Timestep: Climatology,Monthly
Domain: Global
Global surface temperatures: BEST: Berkeley Earth Surface Temperatures
Years of Record: 1701/01 to 2019/07
The Berkeley Earth Surface Temperatures (BEST) are a set of data products, originally a gridded reconstruction of land surface air temperature records spanning 1701-present, and now including an 1850-present merged land-ocean data set that combines the land analysis with an interpolated...
Main variables and Earth System components:
Formats: netCDF
Timestep: Climatology,Daily,Monthly
Domain: Global
Global Temperature Data Sets: Overview & Comparison Table
Years of Record: 1850/01 to 2013/10
Global surface temperature data sets are an essential resource for monitoring and understanding climate variability and climate change. The most commonly used data sets combine historical observations of near surface air temperatures at land stations with global data sets of sea surface...
Main variables and Earth System components:
Formats: netCDF | ascii | binary
Timestep: Climatology,Monthly
Domain: Global
GLODAP: GLobal Ocean Data Analysis Project for Carbon
The GLobal Ocean Data Analysis Project (GLODAP) is a cooperative effort to coordinate global synthesis projects funded through the National Oceanic and Atmospheric Administration (NOAA), the U.S. Department of Energy (DOE), and the National Science Foundation (NSF) as part of the Joint Global Ocean...
Main variables and Earth System components:
Formats: netCDF | ascii
Timestep: Climatology
Domain: Global
GODAS: NCEP Global Ocean Data Assimilation System
Years of Record: 2016/01 to 2016/12
GODAS is a real-time ocean analysis and a reanalysis. It is used for monitoring, retrospective analysis as well as for providing oceanic initial conditions for the CFS. Both temperature and synthetic salinity profiles are assimilated in a 3DVAR scheme. Beginning with March 2007, altimetry sea level...
Main variables and Earth System components:
Formats: netCDF | GRIB
Timestep: Monthly,Pentad
Domain: Global
GPCC: Global Precipitation Climatology Centre
Years of Record: 1891/01 to 2016/12
The GPCC provides gridded gauge-analysis products derived from quality controlled station data. Two products are for climate: (a) the Full Data Reanalysis Product (1901-2010) is recommended for global and regional water balance studies, calibration/validation of remote sensing based rainfall...
Main variables and Earth System components:
Formats: netCDF | ascii
Timestep: Climatology,Daily,Monthly
Domain: Global
GPCP (Daily): Global Precipitation Climatology Project
Years of Record: 1996/10 to 2015/11
The 1DD product provides precipitation estimates on a 1-degree grid over the entire globe at 1-day (daily) for the period October 1996 - present. Both the Pentad and 1DD products are consistent with the Version 2 monthly product in the sense that the Pentad and 1DD approximately sum to the monthly...
Main variables and Earth System components:
Formats: netCDF | binary
Timestep: Daily
Domain: Global
GPCP (Monthly): Global Precipitation Climatology Project
Years of Record: 1979/01 to 2015/11
Data from rain gauge stations, satellites, and sounding observations have been merged to estimate monthly rainfall on a 2.5-degree global grid from 1979 to the present. The careful combination of satellite-based rainfall estimates provides the most complete analysis of rainfall available to date...
Main variables and Earth System components:
Formats: netCDF | binary
Timestep: Climatology,Monthly
Domain: Global
HadEX2: Gridded Temperature and Precipitation Climate Extremes Indices (CLIMDEX data)
Years of Record: 1901/01 to 2010/12
HadEX2 provides gridded, station-based indices of temperature- and precipitation- related climate extremes. It is intended for climate change detection and attribution studies and climate model evaluation. Twenty-nine indices, including daily maximum and minimum temperatures, number of frost days,...
Main variables and Earth System components:
Formats: netCDF | ascii
Timestep: Monthly,Annual
Domain: Global
Harmonized Soil Carbon Database
"This state-of-the-art database was established by IIASA and FAO in partnership with:
ISRIC-World Soil Information which, together with the FAO, contributed recent regional soil and terrain databases together with the WISE soil profile database;
The European Soil Bureau Network, which provided...
Main variables and Earth System components:
Formats: netCDF | ARC/INFO ASCII GRID
Domain: Global
HOAPS: Hamburg Ocean Atmosphere Parameters and Fluxes from Satellite Data
Years of Record: 1987/01 to 2008/12
The Hamburg Ocean Atmosphere Parameters and Fluxes from Satellite Data (HOAPS) set is a satellite-based climatology of precipitation, evaporation and freshwater budget (evaporation minus precipitation) as well as related turbulent heat fluxes and atmospheric state variables over the global ice free...
Main variables and Earth System components:
Formats: netCDF
Timestep: Climatology,Sub-daily,Monthly,Pentad
Domain: Global
IBTrACS: Tropical cyclone best track data
IBTrACS (International Best Track Archive for Climate Stewardship) provides global tropical cyclone best track data in a centralized location to aid our understanding of the distribution, frequency, and intensity of tropical cyclones worldwide. The World Meteorological Organization Tropical Cyclone...
Main variables and Earth System components:
Formats: netCDF | ascii | shapefile
Domain: Global
ICOADS Surface Marine Weather Observations
Years of Record: 1800/01 to 2016/09
ICOADS (International Comprehensive Ocean-Atmosphere Data Set) is the most comprehensive archive of global marine surface climate observations available. Variables include SST, SLP, air temperature, wind speed, cloud amount, and others. There is no processing beyond initial quality control. ICOADS...
Main variables and Earth System components:
Formats: netCDF | ascii | binary | IMMA
Timestep: Climatology,Daily,Monthly
Domain: Global
ISCCP: International Satellite Cloud Climatology Project
Years of Record: 1983/07 to 2009/12
The International Satellite Cloud Climatology Project (ISCCP) makes use of routine observations by operational weather satellites to provide a long-term (1983-2009), gridded, global record of cloud properties. ISCCP uses observations in the visible and infrared window portions of the spectrum to...
Main variables and Earth System components:
Formats: netCDF | binary | HDF
Timestep: Climatology,Sub-daily,Monthly
Domain: Global
Kaplan Sea Surface Temperature Anomalies
Years of Record: 1856/01 to 2019/09
The most up-to-date version is known as Kaplan Extended SST v2, which combines statistically infilled grids of UK Met Office SSTs for 1856-1981 with a statistically reduced and coarser resolution version of Smith and Reynolds Optimally Interpolated (OI) SSTs for 1981 to present. Those desiring only...
Main variables and Earth System components:
Formats: netCDF
Timestep: Monthly
Domain: Global
Liquid Water Path (LWP): UWisc climatology
Years of Record: 1998/01 to 2008/12
"This work describes a new climatology of cloud liquid water path (LWP), termed the University of Wisconsin (UWisc) climatology, derived from 18 yr of satellite-based passive microwave observations over the global oceans. The climatology is based on a modern retrieval methodology applied...
Main variables and Earth System components:
Formats: netCDF
Timestep: Climatology,Monthly
Domain: Global
MSU/AMSU Atmospheric Temperature Climate Data Record, Remote Sensing Systems (RSS)
Years of Record: 1979/01 to 2012/12
A long (30-year+) data set of atmospheric temperatures for 4 tropopsheric and lower stratopsheric layers has been derived from brightness temperatures measured by the Microwave Sounding Unit (MSU) and Advanced Microwave Sounding Unit (AMSU). This page describes the data sets developed by Remote...
Main variables and Earth System components:
Formats: netCDF | ascii | binary
Timestep: Monthly
Domain: Global
NASA Energy and Water cycle Study (NEWS) Climatology of the 1st Decade of the 21st Century Dataset
Years of Record: 1998/01 to 2010/12
This data set summarizes the original observation-based mean fluxes of Water and Energy Budget (WEB) components during the first decade of the 21st century (specifically: 1998-2010), for each continent and ocean basin. These data are summarized on both monthly and annual scales, as well as...
Main variables and Earth System components:
Formats: netCDF | ascii | Spreadsheet
Timestep: Climatology,Monthly,Annual
Domain: Africa, Antarctic, Asia, Atlantic Ocean, Australia, Europe, Indian Ocean, Maritime Continent, North America, South America
NASA MERRA
Years of Record: 1979/01 to 2016/02
The Modern Era Retrospective-Analysis for Research and Applications (MERRA) was undertaken by NASA’s Global Modeling and Assimilation Office with two primary objectives: to place observations from NASA’s Earth Observing System satellites into a climate context and to improve upon the hydrologic...
Main variables and Earth System components:
Formats: netCDF | HDF
Timestep: Sub-daily,Monthly
Domain: Global
NASA's MERRA2 reanalysis
Years of Record: 1980/01 to 2017/11
The Modern-Era Retrospective analysis for Research and Applications, version 2 (MERRA-2) is a global atmospheric reanalysis produced by the NASA Global Modeling and Assimilation Office (GMAO). It spans the satellite observing era from 1980 to the present. The goals of MERRA-2 are to provide a...
Main variables and Earth System components:
Formats: netCDF
Timestep: Sub-daily,Daily,Monthly
Domain: Global
NCAR Sea Level Pressure
Years of Record: 1899/01 to 2019/09
NCAR Sea Level Pressure is a gridded analysis of SLP based on land station reports, covering 1899 to present for latitudes 30°N-90°N. Quality controlled raw data plus empirical corrections for changes in instrumentation and station location.
Main variables and Earth System components:
Formats: netCDF | ascii | binary
Domain: NH - Northern Hemisphere
NCEP Reanalysis (R2)
Years of Record: 1979/01 to 2019/11
NCEP-DOE Reanalysis II (R2) is an improved version of the NCEP-NCAR Reanalysis I (R1). The improvements include an updated model with better physical parameterizations, assorted data assimilation errors were fixed and additional data were included. Still, it is still a 'first generation' product.
Main variables and Earth System components:
Formats: netCDF | GRIB
Timestep: Sub-daily,Daily,Monthly
Domain: Global
NCEP-NCAR (R1): An Overview
Years of Record: 1948/01 to 2019/11
NCEP-NCAR (R1) is the original reanalysis effort. It uses a frozen global state-of-the-art global data assimilation system (as of 11 January 1995). The original database was enhanced (additional, quality checked datasets) by NCAR's Data Support Section. Originally planned to span 1957-96 ("40-Year...
Main variables and Earth System components:
Formats: netCDF | GRIB
Timestep: Sub-daily,Daily,Monthly
Domain: Global
NDVI: Normalized Difference Vegetation Index-3rd generation: NASA/GFSC GIMMS
Years of Record: 1981/07 to 2015/12
Normalized Difference Vegetation Index-3rd generation (NDVI) using the Global Inventory Monitoring and Modeling System (GIMMS): Vegetation indices are radiometric measures of photosynthetically active radiation absorbed by chlorophyll in the green leaves of vegetation canopies and are...
Formats: netCDF
Timestep: Daily
Domain: Global
NDVI: Normalized-difference-vegetation-index: NOAA AVHRR
Years of Record: 1981/06 to 2018/03
Normalized Difference Vegetation Index (NDVI) values are derived from surface reflectance data acquired by the Advanced Very High Resolution Radiometer (AVHRR) sensor. By applying knowledge gathered over time about instrument performance and sensor characteristics, the data are reprocessed to...
Main variables and Earth System components:
Formats: netCDF | GeoTIFF
Timestep: Daily
Domain: Global
NLDAS: North American Land Data Assimilation System
Years of Record: 1980/01 to 2014/12
The goal of the North American Land Data Assimilation System (NLDAS) is to construct quality-controlled, and spatially and temporally consistent, land-surface model (LSM) datasets from the best available observations and model output to support modeling activities. Data sets are available on hourly...
Main variables and Earth System components:
Formats: netCDF | GRIB
Timestep: Climatology,Sub-daily,Monthly
Domain: North America
NOAA 20th-Century Reanalysis, Version 2 and 2c
Years of Record: 1850/12 to 2014/12
The Twentieth Century Reanalysis (20CR) provides a comprehensive global atmospheric circulation data set spanning 1850-2014. Its chief motivation is to provide an observational validation data set, with quantified uncertainties, for assessing climate model simulations of the 20th century, with...
Main variables and Earth System components:
Formats: netCDF | GRIB
Timestep: Sub-daily,Daily,Monthly
Domain: Global
OAFlux: Objectively Analyzed air-sea Fluxes for the global oceans.
Years of Record: 1958/01 to 2012/12
"The OAFlux project aims to provide consistent, multi-decade, global analysis of air-sea heat, freshwater (evaporation), and momentum fluxes for use in studies of global energy budget, water cycle, atmosphere and ocean circulation, and climate. The OAFlux project is so called because it applies...
Main variables and Earth System components:
Formats: netCDF
Timestep: Daily,Monthly
Domain: Global
Ocean heat content for 10-1500m depth based on Argo
Years of Record: 2005/01 to 2011/12
A regularly updated monthly timeseries of ocean heat content, based on Argo profiles, is integrated over 10-1500m depth and the latitudes 60°S-60°N. Coverage begins in 2005. It is estimated based on the method described in von Schuckmann and Le Traon (2011) and discussed in the context of other...
Main variables and Earth System components:
Formats: netCDF
Timestep: Monthly
Domain: Global
ORAS4: ECMWF Ocean Reanalysis and derived ocean heat content
Years of Record: 1958/01 to 2013/04
ECMWF's current ocean reanalysis uses a sophisticated data assimilation methodology which includes a model bias correction. The ocean model used is forced by atmospheric daily surface fluxes, relaxed to SST and bias corrected.
The Balmaseda et al (QJRMS 2013) reference provides excellent peer...
Main variables and Earth System components:
Formats: netCDF | ascii
Timestep: Monthly
Domain: Global
Outgoing Longwave Radiation (OLR): HIRS
Years of Record: 1979/01 to 2012/12
"The new Climate Data Record (CDR) provides daily global climate data that are valuable as inputs into Radiation Budget Studies and verifying numerical models and can identify the variations in tropical clouds and rainfall that drive global weather patterns. The daily climate data of OLR can...
Main variables and Earth System components:
Formats: netCDF
Timestep: Daily,Monthly
Domain: Global
Outgoing Longwave Radiation (OLR): AVHRR
Years of Record: 1974/06 to 2013/12
OLR (Outgoing Longwave Radiation) is a measure of the amount of energy emitted to space by earth's surface, oceans and atmosphere. As such, it is a critical component of the earth's radiation budget. In a different context, OLR values are often used as a proxy for convection in tropical and...
Main variables and Earth System components:
Formats: netCDF
Timestep: Climatology,Sub-daily,Daily,Monthly
Domain: Global
Palmer Drought Severity Index (PDSI)
The Palmer Drought Severity Index (PDSI) uses readily available temperature and precipitation data to estimate relative dryness. It is a standardized index that generally spans -10 (dry) to +10 (wet). Maps of operational agencies like NOAA typically show a range of -4 to +4, but more extreme values...
Main variables and Earth System components:
Formats: netCDF | ascii | binary
Timestep: Monthly
Domain: Global
Precipitation Reconstruction Land (PREC/L): 1948-present
Years of Record: 1948/01 to 2019/10
Precipitation gauge measurements over land from the GHCN-v2 (Global Historical Climatology Network version 2) are interpolated onto 3 grids: at 0.5, 1 and 2.5 degree resolutions via optimal interpolation. Note: As of May, 2011 the GHCN version 3 station data set is available.
Main variables and Earth System components:
Formats: netCDF | ascii | binary
Timestep: Monthly
Domain: Global
QuikSCAT: near sea-surface wind speed and direction
Years of Record: 1999/08 to 2009/10
The QuikSCAT mission was intended to obtain sea-surface wind speed and direction data under all weather and cloud conditions over Earth's oceans. SeaWinds, an active radar scatterometer, is the main instrument on the QuikSCAT satellite. The microwave backscatter measured by SeaWinds is dependent on...
Main variables and Earth System components:
Formats: netCDF | binary
Timestep: Daily,Monthly,Weekly
Domain: Global
Radiative kernels from climate models
The radiative kernel technique is a method used to quantify radiative feedbacks in response to global warming. Radiative kernels are commonly calculated for the water vapor, lapse rate, temperature and albedo feedbacks. Radiative kernels are used to deconstruct the various contributions...
Formats: netCDF
Timestep: Climatology
Domain: Global
RAPID: monitoring the Atlantic Meridional Overturning Circulation at 26.5°N
Years of Record: 2004/04 to 2017/02
"The Rapid Climate Change programme (RAPID) explores what causes rapid switches in climate, with a main (but not exclusive) focus on the Atlantic Ocean's thermohaline circulation."
"A principal objective of the RAPID programme is the development and maintenance of a pre-operational prototype...
Main variables and Earth System components:
Formats: netCDF | ascii
Timestep: Sub-daily
Domain: Atlantic Ocean
Sea Ice Thickness Data Sets: Overview & Comparison Table
While satellite observations of sea ice extent and concentration are available from 1979, long-term high quality (daily and high spatial resolution) observations of sea ice thickness remain limited as a result of few satellite and in situ observations. Reconstructions using numerous observational...
Main variables and Earth System components:
Formats: netCDF | ascii | binary
Timestep: Daily,Monthly,Weekly,Irregular
Domain: Antarctic, Arctic
SEVIRI: Cloud Mask Dataset: Very High Resolution
Years of Record: 2004/01 to 2012/12
The SEVIRI cloud mask dataset has been generated and released by the EUMETSAT Satellite Application Facility on Climate Monitoring (CM SAF) to enhance the cloud property dataset CLAAS. The SEVIRI cloud mask dataset contains the cloud mask in 15 minutes temporal resolution. The dataset is pixel...
Main variables and Earth System components:
Formats: netCDF | HDF
Timestep: Sub-daily,Daily,Monthly
Domain: Africa, Atlantic Ocean, Europe
Snow Cover Extent (Northern Hemisphere) Climate Data Record, by Rutgers
The Snow Cover Extent Climate Data Record extends from the late 1960s to present. Historical analyses based on visual inspection have been digitized and combined with modern multi-spectral remote sensing to produce a seamless record on a hemispheric scale. The data are available at weekly and...
Main variables and Earth System components:
Formats: netCDF | ascii
Timestep: Monthly,Weekly
Domain: North America
SOCAT: Surface Ocean CO2 Atlas
Years of Record: 1970/01 to 2007/12
SOCAT (Surface Ocean CO2 Atlas) represents an effort to "provide a comprehensive, publicly available, regularly updated, global data set of marine surface CO2, which had been subject to quality control (QC)." The data sets are comprised of observations (ship track) and gridded data.
Main variables and Earth System components:
Formats: netCDF
Timestep: Climatology,Monthly,Annual
Domain: Global
SODA: Simple Ocean Data Assimilation
Years of Record: 1870/01 to 2010/12
The Simple Ocean Data Assimilation, or SODA, analysis is an ocean reanalysis data set consisting of gridded variables for the global ocean, as well as several derived fields. The goal is to provide an improved estimate of ocean state from those based solely on observations or numerical simulations.
Main variables and Earth System components:
Formats: netCDF
Timestep: Monthly
Domain: Global
SSMI Version 7: Ocean Product Suite
The Ocean Product Suite (v7) from Remote Sensing Systems (RSS) is available in netCDF (v4) format. The RSS Ocean Product Suite includes numerous data products for the SSMI/SSMIS instruments on the DMSP F08, F10, F11, F13, F14, F15, F17 polar orbiting satellites. These are part of the NASA Making...
Main variables and Earth System components:
Formats: netCDF
Timestep: Sub-daily,Daily,Monthly
Domain: Global
SST (AMSR-E): Sea Surface Temperature from Remote Sensing Systems
Years of Record: 2002/06 to 2010/12
High resolution (0.25°) SSTs were derived from the AMSR-E, a passive microwave radiometer flying on NASA's AQUA satellite. Remote Sensing Systems distributes the data in high spatial and temporal (daily, weekly, monthly) resolutions for both daytime and nighttime averages. Monthly versions are...
Main variables and Earth System components:
Formats: netCDF | binary
Timestep: Daily,Monthly,Weekly
Domain: Global
SST data: AVHRR Pathfinder v5.2, NOAA NODC
Years of Record: 1981/01 to 2011/12
"The AVHRR Pathfinder Version 5.2 (PFV52) data set was computed using an entirely modernized system, based on SeaDAS and incorporating several key changes over the older Pathfinder V5.0 and V5.1 datasets. PFV52 is viewed as a significant step forward in preparation for the future Version 6 (PFV6)...
Main variables and Earth System components:
Formats: netCDF
Timestep: Sub-daily
Domain: Global
SST data: HadiSST v1.1
Years of Record: 1870/01 to 2018/12
The Hadley Centre Global Sea Ice and Sea Surface Temperature (HadISST) is a combination of monthly globally complete fields of SST and sea ice concentration for 1871-present. This page focuses on the SST data; see the separate page for discussion of HadISST sea ice. HadISST uses reduced space...
Main variables and Earth System components:
Formats: netCDF | ascii
Timestep: Monthly
Domain: Global
SST data: HadSST3
Years of Record: 1850/01 to 2017/12
HadSST3 provides monthly SST anomalies on a 5°x5° grid for 1850-present. The anomalies are derived from a 30-year climatology spanning 1961-90.Coverage is global but there is no interpolation; Thus, missing data occur in the final product. The primary input data are from ICOADS release 2.5. Bias...
Main variables and Earth System components:
Formats: netCDF | ascii
Timestep: Monthly
Domain: Global
SST data: HadSST4
Years of Record: 1850/01 to 2018/12
HadSST4 provides monthly SST anomalies on a 5°x5° grid for 1850-present. The anomalies are derived from a 30-year climatology spanning 1961-90. Coverage is global but there is no interpolation; Thus, missing data occur in the final product. This means that uncertainties due to limited spatial...
Main variables and Earth System components:
Formats: netCDF
Timestep: Monthly
Domain: Global
SST Data: NOAA Extended Reconstruction SSTs Version 5 (ERSSTv5)
Years of Record: 1854/01 to 2019/08
The NOAA Extended Reconstruction Sea Surface Temperature (ERSST) provides global, spatially complete SST data at a monthly timestep for 1854-present. Version5 is based upon statistical interpolation of the ICOADS release 3.0 data. Argo float data are used in the recent years (since ~2000). The data...
Main variables and Earth System components:
Formats: netCDF | ascii
Timestep: Climatology,Monthly
Domain: Global
SST data: NOAA Extended Reconstruction SSTs, version 3 (ERSSTv3 & 3b)
Years of Record: 1854/01 to 2019/10
The NOAA Extended Reconstruction Sea Surface Temperature (ERSST) provides global, spatially complete SST data at a monthly timestep for 1854-present. Version3 is based upon statistical interpolation of the ICOADS release 2.4 data. Version 3 includes satellite AVHRR SST data for 1985 onwards....
Main variables and Earth System components:
Formats: netCDF | ascii
Timestep: Monthly
Domain: Global
SST data: NOAA Extended Reconstruction SSTs, Version 4
Years of Record: 1981/10 to 2019/03
The NOAA Extended Reconstruction Sea Surface Temperature (ERSST) provides global, spatially complete SST data at a monthly timestep for 1854-present. Compared to the previous version, Version 4 uses the more extensive ICOADS Release 2.5 data and revised quality control, bias adjustment, and...
Main variables and Earth System components:
Formats: netCDF | ascii
Timestep: Monthly
Domain: Global
Standardized Precipitation Evapotranspiration Index (SPEI)
Years of Record: 1901/01 to 2014/03
The Standardized Precipitation Evapotranspiration Index (SPEI) is an extension of the widely used Standardized Precipitation Index (SPI). The SPEI is designed to take into account both precipitation and potential evapotranspiration (PET) in determining drought. Thus, unlike the SPI, the SPEI...
Formats: netCDF | ascii
Timestep: Monthly,Seasonal,Annual
Domain: Global
Stratospheric Ozone: Vertically Resolved, zonal mean based on BDBP
Years of Record: 1979/01 to 2007/12
Combined monthly mean vertical ozone profile database spanning the period 1979 to 2007. The database is completely filled such that there are no missing data. The raw individual ozone data are sourced from the BDBP database. Monthly means are calculated from individual ozone measurements...
Main variables and Earth System components:
Formats: netCDF
Timestep: Monthly
Domain: Global
Surface Flux and Meteorological Dataset: National Oceanography Centre (NOC) V2.0
Years of Record: 1973/01 to 2014/12
The National Oceanography Centre (NOC) Version 2.0 Surface Flux and Meteorological Dataset is a monthly mean gridded dataset of marine surface measurements and derived fluxes constructed using optimal interpolation. Input for the period 1973 to 2006 are ICOADS Release 2.4 ship data and the...
Main variables and Earth System components:
Formats: netCDF
Timestep: Monthly
Domain: Global
Total Column Ozone: Bodeker Scientific
Bodeker Scientific produces global, daily, total column ozone database by combining measurements from a number of different satellite-based instruments. Offsets and drifts between the different datasets are resolved through comparisons with the Dobson and Brewer ground-based instruments and through...
Main variables and Earth System components:
Formats: netCDF | ascii
Timestep: Daily,Monthly
Domain: Global
TRMM: Tropical Rainfall Measuring Mission
Years of Record: 1998/01 to 2019/09
The Tropical Rainfall Measuring Mission (TRMM) is a joint space mission between NASA and Japan's National Space Development Agency designed to monitor and study tropical and subtropical precipitation and the associated release of energy. The mission uses 5 instruments: Precipitation Radar (PR),...
Main variables and Earth System components:
Formats: netCDF | HDF
Timestep: Sub-daily,Daily,Monthly
Domain: Tropics
Tropical Moored Buoy System: TAO, TRITON, PIRATA, RAMA (TOGA)
Years of Record: 1992/01 to 2013/04
The Tropical Ocean Global Atmosphere program (TOGA) is a component of the World Climate Research Programme (WCRP) aimed specifically at the prediction of climate phenomena on time scales of months to years. In order to achieve the TOGA goals, a strategy of large-scale, long-term monitoring of the...
Main variables and Earth System components:
Formats: netCDF | ascii
Timestep: Sub-daily,Daily,Monthly,Weekly
Domain: Tropics
WASWind: Wave and Anemometer-based Sea Surface Wind
Years of Record: 1950/01 to 2011/12
"WASWind (Wave and Anemometer-based Sea Surface Wind) provides a bias-corrected marine surface wind dataset over the global oceans. Variables include scalar, zonal and meridional winds at 10-meter high, and zonal and meridional components of wind stress. WASWind has been constructed from wind...
Main variables and Earth System components:
Formats: netCDF
Timestep: Monthly
Domain: Global
Water Isotopes from Satellites
Years of Record: 2000/01 to 2012/09
Summary of 7 satellite-derived products providing a global snapshot of water isotope distribution in 3D, with good information on zonal gradients and seasonality.
Main variables and Earth System components:
Formats: netCDF | ascii | HDF
Timestep: Sub-daily,Daily
Domain: Global
World Ocean Atlas (WOA09)
World Ocean Atlas 2009 (WOA09) is a set of objectively analyzed (1 degree grid) climatological fields of in situ temperature, salinity, dissolved oxygen, Apparent Oxygen Utilization (AOU), percent oxygen saturation, phosphate, silicate, and nitrate at standard depth levels for annual, seasonal, and...
Main variables and Earth System components:
Formats: netCDF | ascii
Timestep: Climatology,Monthly,Seasonal,Annual
Domain: Global
World Ocean Atlas 2013 (WOA13)
Years of Record: 1955/01 to 2012/12
The World Ocean Atlas (WOA) is a set of climatological mean, gridded fields of oceanographic variables based on in-situ measurements from a wide variety of sources. Global, decadal averages of temperature, salinity, oxygen and nutrients are provided at monthly, seasonal and annual averaging...
Main variables and Earth System components:
Formats: netCDF | ascii | shapefile
Timestep: Climatology,Monthly,Seasonal
Domain: Global
