Climate Data

The Climate Data Guide is a high-traffic expert knowledge portal providing concise and reliable information on the data that are essential for monitoring and understanding the Earth System. Currently, it curates expert insights on over 200 observational datasets and indices, searchable or browseable in the list below.

To find a specific dataset or climate variable, jump to the the search box. For only the datasets paired with guidance written by experts, select the "Datasets with guidance" button when using the search box.

Data creators, data publishers, and scientists who use climate data are invited to join our Network of Experts by contributing commentaries on data strengths and limitations to the Climate Data Guide. What type of data are included? See this discussion.

With the exception of about 25 climate indices, the Climate Data Guide does not host datasets.  Data cannot be downloaded from this site. However, links are provided to download locations under the "Data Access" section of each dataset page.

Citation: Please link to this website in your work that draws upon material from this website, and cite this paper:

Schneider, D. P., C. Deser, J. Fasullo, and K. E. Trenberth, 2013: Climate Data Guide Spurs Discovery and Understanding. Eos Trans. AGU, 94, 121–122, https://doi.org/10.1002/2013eo130001. 

=> Additionally, each dataset page with expert-written guidance has its own citation example on the individual page, such that the experts who wrote the guidance may be credited. Finally, responsible use and citation of datasets is strongly encouraged.

Climate datasets

Has expert guidance
Nino SST Indices (Nino 1+2, 3, 3.4, 4; ONI and TNI) Nino SST Indices (Nino 1+2, 3, 3.4, 4; ONI and TNI)

  • Years of record

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There are several indices used to monitor the tropical Pacific, all of which are based on sea surface temperature (SST) anomalies averaged across a given region.  Usually the anomalies are computed relative to a base period of 30 years.  The Niño 3.4 index…

Main variables and Earth System components

Ocean SST - sea surface temperature
Standardized Precipitation Index (SPI) Standardized Precipitation Index (SPI)

  • Years of record

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The Standardized Precipitation Index (SPI) is a widely used index to characterize meteorological drought on a range of timescales. On short timescales, the SPI is closely related to soil moisture, while at longer timescales, the SPI can be related to groundwater and…

Main variables and Earth System components

Atmosphere Precipitation Land Drought

    • Formats

    • Timestep

    • Monthly

    • Domain

    • Collections

    • None
Palmer Drought Severity Index (PDSI) Palmer Drought Severity Index (PDSI)

  • Years of record

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 +…

Main variables and Earth System components

Land Drought
Standardized Precipitation Evapotranspiration Index (SPEI) Standardized Precipitation Evapotranspiration Index (SPEI)

  • Years of record

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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,…

Main variables and Earth System components

    • Timestep

    • Monthly, Seasonal, Annual

    • Collections

    • None
Atlantic Multi-decadal Oscillation (AMO) Atlantic Multi-decadal Oscillation (AMO) and Atlantic Multidecadal Variability (AMV)

  • Years of record

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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…

Main variables and Earth System components

Ocean SST - sea surface temperature
Pacific Decadal Oscillation (PDO): Definition and Indices Pacific Decadal Oscillation (PDO): Definition and Indices

  • Years of record

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The Pacific Decadal Oscillation (PDO) is defined by the leading pattern (EOF) of sea surface temperature (SST) anomalies in the North Pacific basin (typically, polewards of 20°N).  The SST anomalies are obtained by removing both the climatological annual cycle and the…

Main variables and Earth System components

Ocean SST - sea surface temperature
PRISM High-Resolution Spatial Climate Data for the United States: Max/min temp, dewpoint, precipitation PRISM High-Resolution Spatial Climate Data for the United States: Max/min temp, dewpoint, precipitation

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PRISM is a set of monthly, yearly, and single-event gridded data products of mean temperature and precipitation, max/min temperatures, and dewpoints, primarily for the United States. In-situ point measurements are ingested into the PRISM (Parameter elevation Regression on…

Main variables and Earth System components

Atmosphere Dew Point Temperature Maximum Air Temperature Minimum Air Temperature Precipitation
ERA5 atmospheric reanalysis ERA5 atmospheric reanalysis

  • Years of record

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ERA5, the successor to ERA-Interim, provides global, hourly estimates of atmospheric, ocean-wave and land-surface variables, at a horizontal resolution of 31 km and 137 levels in the vertical from the surface to 0.01 hPa (about 80km). Produced by ECMWF on behalf of the…

Main variables and Earth System components

Atmosphere Land Ocean wave height
TerraClimate: Global, high-resolution gridded temperature, precipitation, and other water balance variables TerraClimate: Global, high-resolution gridded temperature, precipitation, and other water balance variables

  • Years of record

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TerraClimate is a global gridded dataset of meteorological and water balance variables for 1958-present, available on a monthly timestep. Its relatively fine spatial resolution, global extent, and long length are a unique combination that fills a void in climate data…

Main variables and Earth System components

Atmosphere Air Temperature Maximum Air Temperature Minimum Air Temperature Potential Evapotranspiration Precipitation Wind Snow Water Equivalent Land evapotranspiration Runoff and Streamflow Soil Moisture

    • Timestep

    • Climatology, Monthly

    • Collections

    • None
JRA-55 JRA-55

  • Years of record

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Spanning 1958-present, JRA-55 is the longest third-generation reanalysis that uses the full observing system (in contrast, products like ERA-20C and NOAA 20CR assimilate a very limited set of observations while NCEP R1 uses an antiquated model and assimilation scheme).…

Main variables and Earth System components

Atmosphere Air Temperature Geopotential Height Precipitable water

    • Timestep

    • Sub-daily, Monthly

    • Collections

    • None
GPCP (Monthly): Global Precipitation Climatology Project GPCP (Monthly): Global Precipitation Climatology Project

  • Years of record

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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…

Main variables and Earth System components

Atmosphere Precipitation
IBTrACS: Tropical cyclone best track data IBTrACS: Tropical cyclone best track data

  • Years of record

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…

Main variables and Earth System components

Atmosphere Storm data
NAO DJFM Station-based Index Hurrell North Atlantic Oscillation (NAO) Index (station-based)

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The winter (December thru March) station-based index of the NAO is based on the difference of normalized sea level pressure (SLP) between Lisbon, Portugal and Stykkisholmur/Reykjavik, Iceland since 1864. Positive values of the NAO index are typically associated with…

Main variables and Earth System components

Atmosphere Sea Level Pressure
Global surface temperatures: BEST: Berkeley Earth Surface Temperatures Global surface temperatures: BEST: Berkeley Earth Surface Temperatures

  • Years of record

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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…

Main variables and Earth System components

Atmosphere Air Temperature Maximum Air Temperature Minimum Air Temperature Ocean SST - sea surface temperature
GPCC: Global Precipitation Climatology Centre GPCC: Global Precipitation Climatology Centre

  • Years of record

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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…

Main variables and Earth System components

Atmosphere Precipitation

  • Experts contributing reviews

  • None
Atmospheric Reanalysis: Overview & Comparison Tables Atmospheric Reanalysis: Overview & Comparison Tables

  • Years of record

Reanalysis a systematic approach to produce data sets for climate monitoring and research. Reanalyses are created via an unchanging ("frozen") data assimilation scheme and model(s) which ingest all available observations every 6-12 hours over the period being analyzed.…

Main variables and Earth System components

Atmosphere
APHRODITE: Asian Precipitation - Highly-Resolved Observational Data Integration Towards Evaluation of Water Resources APHRODITE: Asian Precipitation - Highly-Resolved Observational Data Integration Towards Evaluation of Water Resources

  • Years of record

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APHRODITE’s (Asian Precipitation - Highly-Resolved Observational Data Integration Towards Evaluation) gridded precipitation is a set of long-term (1951 onward) continental-scale daily products that is based on a dense network of rain-gauge data for Asia including the…

Main variables and Earth System components

Atmosphere Air Temperature Precipitation
TRMM: Tropical Rainfall Measuring Mission TRMM: Tropical Rainfall Measuring Mission

  • Years of record

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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:…

Main variables and Earth System components

Atmosphere Precipitation
timeseries of signal and noise in the SOI Southern Oscillation Indices: Signal, Noise and Tahiti/Darwin SLP (SOI)

  • Years of record

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The Southern Oscillation Index (SOI) is a time series used to characterize the large scale sea level pressure (SLP) patterns in the tropical Pacific. Monthly mean SLP at Tahiti [T] and Darwin [D] are used. An optimal SOI can be constructed. It consists of  [T-D] which…

Main variables and Earth System components

Atmosphere Sea Level Pressure
Marshall Southern Annular Mode (SAM) Index (Station-based) Marshall Southern Annular Mode (SAM) Index (Station-based)

  • Years of record

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The station-based index of the Southern Annular Mode (SAM) is based on the zonal pressure difference between the latitudes of 40S and 65S.  As such, the SAM index measures a "see-saw" of atmospheric mass between the middle and high latitudes of the Southern Hemisphere…

Main variables and Earth System components

Atmosphere Sea Level Pressure
SST data: NOAA High-resolution (0.25x0.25) Blended Analysis of Daily SST and Ice, OISSTv2 SST data: NOAA High-resolution (0.25x0.25) Blended Analysis of Daily SST and Ice, OISSTv2

  • Years of record

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"NOAA’s Optimum Interpolation Sea Surface temperature (OISST, also known as Reynolds’ SST) is a series of global analysis products, including the weekly OISST on a 1° grid to the more recent daily on a ¼° grid. An SST analysis is a spatially gridded product created by…

Main variables and Earth System components

Cryosphere Sea Ice Concentration Ocean SST - sea surface temperature
NASA's MERRA2 reanalysis NASA's MERRA2 reanalysis

  • Years of record

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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…

Main variables and Earth System components

Atmosphere Aerosols Air Temperature Geopotential Height Precipitable water

    • Timestep

    • Sub-daily, Daily, Monthly

    • Collections

    • None
ERA-Interim ERA-Interim

  • Years of record

  • to

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…

Main variables and Earth System components

Atmosphere Air Temperature Geopotential Height Precipitable water Precipitation
NAO PC-based Index (DJFM) Hurrell North Atlantic Oscillation (NAO) Index (PC-based)

  • Years of record

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The principal component (PC)-based indices of the North Atlantic Oscillation (NAO) are the time series of the leading Empirical Orthogonal Function (EOF) of SLP anomalies over the Atlantic sector, 20°-80°N, 90°W-40°E. These indices are used to measure the NAO…

Main variables and Earth System components

Atmosphere Sea Level Pressure
Global surface temperature data: GISTEMP: NASA Goddard Institute for Space Studies (GISS) Surface Temperature Analysis Global surface temperature data: GISTEMP: NASA Goddard Institute for Space Studies (GISS) Surface Temperature Analysis

  • Years of record

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NASA Goddard's Global Surface Temperature Analysis (GISTEMP) combines land surface air temperatures from GHCN-M version 4 with SSTs of the ERSSTv5 analysis into a comprehensive, global surface temperature data set spanning 1880 to the present at monthly resolution, on a…

Main variables and Earth System components

Atmosphere Air Temperature Ocean SST - sea surface temperature
Global (land) precipitation and temperature: Willmott & Matsuura, University of Delaware Global (land) precipitation and temperature: Willmott & Matsuura, University of Delaware

  • Years of record

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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)…

Main variables and Earth System components

Atmosphere Air Temperature Air Temperature at 2m Precipitation
PERSIANN-CDR: Precipitation Estimation from Remotely Sensed Information using Artificial Neural Networks - Climate Data Record PERSIANN-CDR: Precipitation Estimation from Remotely Sensed Information using Artificial Neural Networks - Climate Data Record

  • Years of record

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The Precipitation Estimation from Remotely Sensed Information using Artificial Neural Networks- Climate Data Record (PERSIANN-CDR) provides daily rainfall estimates at a spatial resolution of 0.25 degrees in the latitude band 60S - 60N from 1983 to the near-present…

Main variables and Earth System components

Atmosphere Precipitation
Map of May 2014 precipitation totals according to CHIRPSv2. Provided by C. Martinez. CHIRPS: Climate Hazards InfraRed Precipitation with Station data (version 2)

  • Years of record

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Climate Hazards Group InfraRed Precipitation with Station data (CHIRPS) is a quasi-global (50S - 50N), land-only rainfall dataset with a range of temporal and spatial resolutions depending on the region and the time period. Data can be found at 0.05 deg or 0.1 deg…

Main variables and Earth System components

Atmosphere Precipitation

    • Timestep

    • Climatology, Sub-daily, Daily, Monthly, Seasonal, Pentad

    • Collections

    • None
temporal correlations between 3-day mean rain gauge- and MSWEP-based time series. Each data point represents a rain gauge. Figure from Beck et al. (2017). Global high-resolution precipitation: MSWEP

  • Years of record

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Multi-Source Weighted-Ensemble Precipitation (MSWEP) is a sub-daily precipitation dataset with full global coverage at 0.1° resolution, spanning the period 1979 to present. It is updated in near real-time with a latency of three hours, making it suitable for…

Main variables and Earth System components

Atmosphere Precipitation

    • Timestep

    • Sub-daily

    • Collections

    • None
Soil Moisture Data Sets: Overview & Comparison Tables Soil Moisture Data Sets: Overview & Comparison Tables

  • Years of record

Soil moisture is a state variable of the land that crosses the interfaces of several disciplines, including meteorology, hydrology, climatology and ecology. Soil moisture content controls the partitioning of net radiation at the land surface between sensible and latent…

Main variables and Earth System components

Land Soil Moisture
SST Data: NOAA Extended Reconstruction SSTs Version 5 (ERSSTv5) SST Data: NOAA Extended Reconstruction SSTs Version 5 (ERSSTv5)

  • Years of record

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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…

Main variables and Earth System components

Ocean SST - sea surface temperature
Tide gauge sea level data Tide gauge sea level data

  • Years of record

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The global sea level record from tide gauges is an important indicator of the evolution and impact of global change. Tide gauge data also capture a variety of local and regional phenomena related to decadal climate variability, tides, storm surges, tsunamis, swells,…

Main variables and Earth System components

Ocean Sea Level

    • Formats

    • Timestep

    • Sub-daily, Daily, Monthly, Annual

    • Collections

    • None
GPPM logo decal, from NASA, https://gpm.nasa.gov/resources/images/gpm-decal IMERG precipitation algorithm and the Global Precipitation Measurement (GPM) Mission

  • Years of record

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IMERG (Integrated Multi-satellitE Retrievals for the Global Precipitation Measurement) is NASA's updated precipitation algorithm, while the Global Precipitation Measurement (GPM) mission is an international satellite mission launched by NASA and JAXA on Feb. 27, 2014. The…

Main variables and Earth System components

Atmosphere Precipitation
GPCP (Daily): Global Precipitation Climatology Project GPCP (Daily): Global Precipitation Climatology Project

  • Years of record

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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…

Main variables and Earth System components

Atmosphere Precipitation
Global land-ocean surface temperature data: HadCRUT5 Global land-ocean surface temperature data: HadCRUT5

  • Years of record

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HadCRUT5 is one of the main datasets used to monitor global and regional surface temperature variability and trends. It is a global surface temperature product that combines land surface air temperatures from CRUTEM5 with SSTs from HadSST4. HadCRUT5 is a departure from its…

Main variables and Earth System components

Atmosphere Air Temperature at 2m Ocean SST - sea surface temperature
CMAP: CPC Merged Analysis of Precipitation CMAP: CPC Merged Analysis of Precipitation

  • Years of record

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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)…

Main variables and Earth System components

Atmosphere Precipitation
From Petty et al. (2020); provided by Rachel Tilling Sea Ice Thickness Data Sets: Overview & Comparison Table

  • Years of record

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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…

Main variables and Earth System components

Cryosphere Sea Ice Thickness
maps of SIF and GPP (contributed by Jingfeng Xiao and Xing Li) Global dataset of solar-induced chlorophyll fluorescence (GOSIF)

  • Years of record

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GOSIF is a global, gridded dataset of solar-induced chlorophyll fluorescence (SIF). SIF, an energy flux re-emitted by plants a few nanoseconds after light absorption, exhibits a strong linear relationship with gross primary production (GPP) at the ecosystem scale and…

Main variables and Earth System components

Biosphere GPP: Gross Primary Production solar-induced chlorophyll fluorescence (SIF) Land Gross Primary Production

    • Formats

    • Timestep

    • Monthly, Weekly

    • Collections

    • None
CCMP: Cross-Calibrated Multi-Platform wind vector analysis CCMP: Cross-Calibrated Multi-Platform wind vector analysis

  • Years of record

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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…

Main variables and Earth System components

Atmosphere Wind

    • Timestep

    • Sub-daily

    • Collections

    • None
SST data: NOAA Optimal Interpolation (OI) SST Analysis, version 2 (OISSTv2) 1x1 SST data: NOAA Optimal Interpolation (OI) SST Analysis, version 2 (OISSTv2) 1x1

  • Years of record

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The NOAA Optimal Interpolation SST analysis provides global, spatially complete SSTs on a weekly and monthly basis for 1982-present.

Main variables and Earth System components

Ocean SST - sea surface temperature
Total Solar Irradiance (TSI) datasets: An overview Total Solar Irradiance (TSI) datasets: An overview

  • Years of record

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The solar radiation arriving at Earth (once known as the “solar constant”, now usually referred to as Total Solar Irradiance (TSI)), is the most fundamental of climate parameters as it indicates the totality of the energy driving the climate system.  All climate…

Main variables and Earth System components

Atmosphere solar irradiance

    • Formats

    • Timestep

    • Collections

    • None
CHELSA high-resolution land surface temperature and precipitation CHELSA high-resolution land surface temperature and precipitation

  • Years of record

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The Climatologies at high resolution for the Earth's land surface (CHELSA) dataset contains high spatial resolution monthly climatologies of mean, maximum and minimum temperatures and mean precipitation, representing the period 1979-2013.  CHELSA is essentially a…

Main variables and Earth System components

Atmosphere Air Temperature Precipitation

    • Timestep

    • Climatology, Monthly

    • Collections

    • None
Cloud Dataset Overview Cloud Dataset Overview

  • Years of record

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Clouds cover about 70% of the earth's surface. They are important components of the cliimate's water and energy budgets. Historically, cloud reports have come from station or ship observations.  The satellite observation era, beginning in the 1980’s and spanning now…

Main variables and Earth System components

Atmosphere Cloud Properties
NCAR Sea Level Pressure NCAR Sea Level Pressure

  • Years of record

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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

Atmosphere Sea Level Pressure
GHCN-D: Global Historical climatology Network daily temperatures GHCN-D: Global Historical climatology Network daily temperatures

  • Years of record

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The Global Historical Climatology Network Daily database, GHCN-D, contains meteorological measurements from over 90,000 stations across the globe.  The majority of station records contain precipitation data only, however other key variables including maximum…

Main variables and Earth System components

Atmosphere Maximum Air Temperature Minimum Air Temperature Precipitation

    • Timestep

    • Daily

    • Collections

    • None
Amundsen Sea Low indices Amundsen Sea Low indices

  • Years of record

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The Amundsen Sea Low (ASL) is a climatological low pressure center located over the extreme southern Pacific Ocean, off the coast of West Antarctica.  Atmospheric variability in this region is larger than anywhere else in the Southern Hemisphere, and exhibits…

Main variables and Earth System components

Atmosphere Sea Level Pressure
Cross section of a tree trunk showing alternating light and dark layers of the tree rings. from ucar scied, https://scied.ucar.edu/learning-zone/how-climate-works/tree-rings-and-climate credit pixabay Tree-ring width chronologies: An overview of their use as climate proxies and of available databases

  • Years of record

The width of an annual tree ring is a very simple indicator of the character of that year’s weather, but collectively the global network of tree-ring width measurements represents an invaluable resource for high-resolution paleoclimatology.

Main variables and Earth System components

    • Formats

    • Timestep

    • Annual

    • Collections

    • None
NLDAS-2 Primary Forcing monthly average 2-m surface temperature for July 1980. NLDAS: North American Land Data Assimilation System

  • Years of record

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The North American Land Data Assimilation System (NLDAS) integrates a large quantity of observation-based and model reanalysis data to produce long-term hourly atmospheric forcing data, and then uses this meteorological data to drive offline (not coupled to the atmosphere…

Main variables and Earth System components

Atmosphere Air Temperature CAPE Evaporation Precipitation Radiation Specific Humidity Surface Pressure Wind
FWI p95 in ERAI and CESM1-LE (contributed by Danielle Touma) Canadian Forest Fire Weather Index (FWI)

  • Years of record

Fire weather indices are used to quantify the meteorological conditions that can lead to fire ignition and spread. They are used to communicate fire danger levels to emergency and fire fighting management, as well as the public on short time scales, and also for…

Main variables and Earth System components

Atmosphere

    • Formats

    • Timestep

    • Domain

    • Collections

    • None
World Ocean Atlas 2013 (WOA13) World Ocean Atlas 2013 (WOA13)

  • Years of record

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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,…

Main variables and Earth System components

Ocean Dissolved Oxygen phosphate potential temperature silicate SST - sea surface temperature Sub Surface Salinity Sub Surface Temperature Sub-surface data