Articles | Volume 5, issue 1
https://doi.org/10.5194/wcd-5-1-2024
https://doi.org/10.5194/wcd-5-1-2024
Research article
 | 
10 Jan 2024
Research article |  | 10 Jan 2024

Seasonally dependent increases in subweekly temperature variability over Southern Hemisphere landmasses detected in multiple reanalyses

Patrick Martineau, Swadhin K. Behera, Masami Nonaka, Hisashi Nakamura, and Yu Kosaka

Data sets

NOAA-CIRES 20th Century Reanalysis V2c NOAA's Physical Sciences Laboratory https://psl.noaa.gov/data/gridded/data.20thC_ReanV2c.html

NOAA-CIRES-DOE 20th Century Reanalysis V3 NOAA's Physical Sciences Laboratory https://psl.noaa.gov/data/gridded/data.20thC_ReanV3.html

NCEP Climate Forecast System Reanalysis (CFSR) 6-hourly Products, January 1979 to December 2010 S. Saha et al. https://doi.org/10.5065/D69K487J

NCEP Climate Forecast System Version 2 (CFSv2) 6-hourly Products. Research Data Archive at the National Center for Atmospheric Research S. Saha et al. https://doi.org/10.5065/D61C1TXF

ERA5 hourly data on pressure levels from 1940 to present H. Hersbach et al. https://doi.org/10.24381/cds.bd0915c6

ERA-20C Project (ECMWF Atmospheric Reanalysis of the 20th Century) European Centre for Medium-Range Weather Forecasts https://doi.org/10.5065/D6VQ30QG

NCEP/NCAR Global Reanalysis Products, 1948--continuing National Centers for Environmental Prediction http://rda.ucar.edu/datasets/ds090.0/

NCEP/DOE Reanalysis 2 (R2), Research Data Archive at the National Center for Atmospheric Research National Centers for Environmental Prediction http://rda.ucar.edu/datasets/ds091.0/

JRA-55: Japanese 55-year Reanalysis, Daily 3-Hourly and 6-Hourly Data Japan Meteorological Agency https://doi.org/10.5065/D6HH6H41

JRA-55C: The Japanese 55-year Reanalysis Using Conventional Data Only Japan Meteorological Agency https://doi.org/10.5065/D67H1GNZ

inst3\_3d\_asm\_Cp: MERRA 3D IAU State, Meteorology Instantaneous 3-hourly V5.2.0 Global Modeling and Assimilation Office (GMAO) https://doi.org/10.5067/8D4LU4390C4S

MERRA-2 inst3\_3d\_asm\_Np: 3d,3-Hourly, Instantaneous, Pressure Level, Assimilation, Assimilated Meteorological Fields V5.12.4 Global Modeling and Assimilation Office (GMAO) https://doi.org/10.5067/QBZ6MG944HW0

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Short summary
The representation of subweekly near-surface temperature variability trends over the Southern Hemisphere landmasses is compared across multiple atmospheric reanalyses. It is found that there is generally a good agreement concerning the positive trends affecting South Africa and Australia in the spring, and South America in the summer. A more efficient generation of subweekly temperature variance by horizontal temperature fluxes contributes to the observed rise.