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
Main Authors: Cao, B. (Bin), Gruber, S. (Stephan), Zheng, D. (Donghai), Li, X. (Xin)
Format: Article in Journal/Newspaper
Language:English
Published: 2020
Subjects:
Canada
Active layer thickness
permafrost
Alaska
Online Access:https://ir.library.carleton.ca/pub/27959
https://doi.org/10.5194/tc-14-2581-2020
Description
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 ĝ 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 ( <1.89<

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