Climate data guide content with tag 4DVAR
CERA-20C: ECMWF's Coupled Ocean-Atmosphere Reanalysis of the 20th Century
Years of record
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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 over the oceans from ICOADSv2.5.1. Upper-air and satellite data are…
Main variables and Earth System components
Atmosphere Multiple variables Cryosphere Sea Ice Concentration OceanExperts contributing reviews
- Laloyaux, Patrick
ERA-20C: ECMWF's atmospheric reanalysis of the 20th century (and comparisons with NOAA's 20CR)
Years of record
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The ECMWF's first atmospheric reanalysis of the 20th Century, ERA-20C, provides a long, gridded dataset of many climate variables, spanning 1900-2010. Observations assimilated include surface pressures from the International Surface Pressure Databank v3.2.6 and ICOADS v 2.5.1, and surface winds over the oceans from ICOADSv2.5.1. Upper-air and satellite data…
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Timestep
- Sub-daily, Daily, Monthly
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Domain
- Global
Experts contributing reviews
- Poli, Paul
ERA-Interim
Years of record
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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 circulation in the stratosphere, were eliminated or significantly reduced…
Main variables and Earth System components
Atmosphere Air Temperature Geopotential Height Precipitable water Precipitation-
Timestep
- Sub-daily, Daily, Monthly
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Domain
- Global
Experts contributing reviews
- Dee, Dick
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 European Union’s Copernicus Climate Change Service (C3S), ERA5 extends from 1940 onwards. Each day one…
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Timestep
- Sub-daily, Daily, Monthly
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Domain
- Global
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Collections
- Diagnostic Data Sets
Experts contributing reviews
- Hersbach, Hans
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). Compared to the previous generation Japanese Meteorological Agency (JMA) reanalysis, JRA-25, JRA-…
Main variables and Earth System components
Atmosphere Air Temperature Geopotential Height Precipitable waterExperts contributing reviews
- Kobayashi, Shinya
JRA-55C (reanalysis using conventional observations)
Years of record
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JRA-55C is a fixed observing system atmospheric reanalysis that uses the same model and data assimilation scheme as JRA-55. The observations assimilated include surface station data, radiosondes, tropical cyclone retrievals and wind profilers. No satellite observations are included. JRA-55C spans November, 1972 thru December, 2012 but may be extended back to…
Main variables and Earth System components
N/AExperts contributing reviews
- Kobayashi, Chiaki
Southern Ocean State Estimate (SOSE)
Years of record
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The Southern Ocean State Estimate (SOSE) is a model-generated best fit to Southern Ocean observations. As such, it provides a quantitatively useful climatology of the mean-state of the Southern Ocean. Technically, SOSE is a solution to the MITgcm. SOSE is a gridded dataset at 1/6 ° horizontal resolution, available at timesteps from daily to annually.…
Main variables and Earth System components
Ocean 3D Velocity Bottom pressure SST - sea surface temperature Salinity Sub Surface Temperature mixed layer depth sea surface height u, v current components Wind Stress-
Formats
- binary
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Timestep
- Daily, Monthly, Weekly, Annual
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Collections
- N/A
Experts contributing reviews
- Mazloff, Matthew