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Sudden Stratospheric Warming Compendium

Published by DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce | National Oceanic and Atmospheric Administration, Department of Commerce | Metadata Last Checked: January 27, 2026 | Last Modified: 2016-04-29T00:00:00.000+00:00
Sudden Stratospheric Warming Compendium (SSWC) data set documents the stratospheric, tropospheric, and surface climate impacts of sudden stratospheric warmings. This examines major mid-winter warmings, as defined by a reversal between November-March of the zonal winds at 10 hPa and 60N from westerly to easterly. The one major warming that occurred in the Southern Hemisphere is also included. Analyses are available from 6 different reanalyses: MERRA2 (1980-2014), JRA-55 (1958-2014), ERA-interim (1979-2014), ERA-40 (1958-2002), NOAA20CR (1958-2011), and NCEP-NCAR I (1958-2014). Global gridded anomaly fields are calculated from smoothed daily climatologies based on the full record of each reanalysis. Data is provided 60 days prior to and after each SSW event. Pressure-level fields include winds, temperatures, geopotential heights, vorticity and potential vorticity, and ozone; surface fields include temperatures, sea-level pressures, and precipitation. Other derived data and climate indices are also included. Data are provided as daily means, with 2.5x2.5 degree horizontal resolution for pressure-level fields and native horizontal resolution for surface fields. Daily climatological means and standard deviations of all input fields are included with the output.

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Earth Science > Atmosphere Earth Science > Atmosphere > Atmospheric Pressure > Sea Level Pressure Earth Science > Atmosphere > Atmospheric Temperature > Surface Temperature > Air Temperature Earth Science > Atmosphere > Atmospheric Temperature > Surface Temperature > Maximum/Minimum Temperature Earth Science > Atmosphere > Atmospheric Temperature > Upper Air Temperature Earth Science > Atmosphere > Atmospheric Winds > Upper Level Winds Earth Science > Atmosphere > Atmospheric Winds > Wind Dynamics > Vorticity Earth Science > Atmosphere > Precipitation > Precipitation Amount > 24 Hour Precipitation Amount Earth Science > Climate Indicators > Atmospheric/Ocean Indicators > Precipitation Indices Earth Science > Climate Indicators > Atmospheric/Ocean Indicators > Temperature Indices Earth Science > Atmosphere > Altitude > Geopotential Height Atmospheric - Surface - Air Temperature Atmospheric - Upper-air - Upper-air Temperature Atmospheric - Upper-air - Upper-air Wind Speed And Direction Atmospheric - Surface - Precipitation Atmospheric - Surface - Air Pressure Geographic Region > Global Vertical Location > Troposphere Vertical Location > Stratosphere Vertical Location > Troposphere Vertical Location > Stratosphere ERA-I > ECMWF Interim Reanalysis MERRA > Modern Era Retrospective-analysis for Research and Applications MERRA-2 > The second Modern-Era Retrospective analysis for Research and Applications JMA55 > JMA Japanese 55-year Reanalysis NNRP > NCEP/NCAR Reanalysis Project ERA40 > ECMWF ERA40 Reanalysis Project REANALYSIS MODELS ECMWF > European Centre for Medium-Range Weather Forecasts NASA/GSFC/SED/ESD/GMAO > Global Modeling and Assimilation, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA JP/JMA > Japan Meteorological Agency, Japan DOC/NOAA/OAR/ESRL/PSD > Physical Sciences Division, Earth System Research Laboratory, OAR, NOAA, U.S. Department of Commerce DOC/NOAA/NWS/NCEP/EMC > Environmental Modeling Center, National Centers for Environmental Prediction, National Weather Service, NOAA, U.S. Department of Commerce UCAR/NCAR > National Center for Atmospheric Research, University Corporation for Atmospheric Research Sudden Stratospheric Warming

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