Years of Record: 1979/01 to 2020/01
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 significant correlations with both...
Main variables and Earth System components:
Formats: ascii | csv
Timestep: Monthly,Seasonal,Annual
Domain: Antarctic, SH - Southern Hemisphere, Southern Ocean
See Expert Guidance by Hosking, Scott
Years of Record: 1905/01 to 2013/12
This dataset consists of seasonally resolved timeseries of surface pressure at 18 Antarctic research stations, spanning 1905-2013. Routine meteorological observations began at most of these stations only around 1960, leaving a very short instrumental record on which to assess Antarctic...
Main variables and Earth System components:
Formats: ascii | Spreadsheet
Timestep: Seasonal
Domain: Antarctic 
Years of Record: 1950/01 to 2019/07
E-OBS is a high spatial resolution daily gridded data that covers the European region and is based on the station data collated by the ECA&D initiative (Klein Tank et al., 2002). These data are supplied by many European National Meteorological Services and other data providers across Europe and...
Main variables and Earth System components:
Formats: netCDF
Timestep: Daily
Domain: Europe
See Expert Guidance by van der Schrier, Gerard
Years of Record: 1864/12 to 2020/02
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 stronger-than-average...
Main variables and Earth System components:
Formats: ascii
Timestep: Monthly,Seasonal,Annual
Domain: Atlantic Ocean
See Expert Guidance by Hurrell, James
Years of Record: 1899/01 to 2022/03
The NAM (or Arctic Oscillation) is defined as the first EOF of NH (20°-90°N) winter SLP data. It explains 23% of the extended winter mean (December-March) variance, and it is clearly dominated by the NAO structure in the Atlantic sector. Although there are some subtle differences from the NAO...
Main variables and Earth System components:
Formats: ascii
Timestep: Seasonal
Domain: Atlantic Ocean, NH - Northern Hemisphere, Pacific Ocean 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
See Expert Guidance by Deser, Clara
Years of Record: 1957/01 to 2015/09
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. Positive values of...
Main variables and Earth System components:
Formats: ascii
Domain: Antarctic, SH - Southern Hemisphere, Southern Ocean
See Expert Guidance by Marshall, Gareth
Years of Record: 1899/01 to 2022/03
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
See Expert Guidance by Hurrell, James | See Expert Guidance by Trenberth, Kevin
Years of Record: 1899/01 to 2022/03
The North Pacific Index (NP index or NPI) is the area-weighted sea level pressure over the region 30°N-65°N, 160°E-140°W. The NP index is defined to measure interannual to decadal variations in the atmospheric circulation. The dominant atmosphere-ocean relation in the North Pacific is one where...
Main variables and Earth System components:
Formats: ascii
Timestep: Monthly,Seasonal
Domain: NH - Northern Hemisphere, Pacific Ocean
See Expert Guidance by Hurrell, James
Years of Record: 1865/12 to 2022/03
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 is a measure of the large...
Main variables and Earth System components:
Formats: netCDF | ascii
Timestep: Monthly
Domain: Australia, Pacific Ocean, Tropics
See Expert Guidance by Trenberth, Kevin
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
See Expert Guidance by Kent, Elizabeth
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 