The ERA5-Land soil temperature bias in permafrost regions

ERA5-Land (ERA5L) is a reanalysis product derived by running the land component of ERA5 at increased resolution. This study evaluates ERA5L soil temperature in permafrost regions based on observations and published permafrost products. We find that ERA5L overestimates soil temperature in northern Ca...

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Bibliographic Details
Published in:The cryosphere 2020-08, Vol.14 (8), p.2581-2595
Main Authors: Cao, Bin, Gruber, Stephan, Zheng, Donghai, Li, Xin
Format: Article
Language:English
Subjects:
Air temperature
Bias
Computer simulation
Decision making
Heat conductivity
Hydrology
Ice
Land surface models
Parameterization
Permafrost
Regions
Simulation
Snow
Snow density
Soil
Soil temperature
Soils
Temperature
Temperature requirements
Thickness
Time series
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Summary:ERA5-Land (ERA5L) is a reanalysis product derived by running the land component of ERA5 at increased resolution. This study evaluates ERA5L soil temperature in permafrost regions based on observations and published permafrost products. We find that ERA5L overestimates soil temperature in northern Canada and Alaska but underestimates it in mid–low latitudes, leading to an average bias of −0.08 ∘C. The warm bias of ERA5L soil is stronger in winter than in other seasons. As calculated from its soil temperature, ERA5L overestimates active-layer thickness and underestimates near-surface (
ISSN:1994-0424
1994-0416
1994-0424
1994-0416
DOI:10.5194/tc-14-2581-2020