气候变化领域集成服务门户(CCPortal): Cooler Arctic surface temperatures simulated by climate models are closer to satellite-based data than the ERA5 reanalysis

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DOI	10.1038/s43247-024-01276-z
	Cooler Arctic surface temperatures simulated by climate models are closer to satellite-based data than the ERA5 reanalysis
	Tian, Tian; Yang, Shuting; Hoyer, Jacob Lorentsen; Nielsen-Englyst, Pia; Singha, Suman
发表日期	2024
EISSN	2662-4435
起始页码	5
结束页码	1
卷号	5 期号:1
英文摘要	Many climate models simulate near-surface air temperatures that are too low in the Arctic compared to the observation-based ERA5 reanalysis data, a bias that was noted in the Inter-governmental Panel on Climate Change Sixth Assessment Report (IPCC AR6). Here we present a high-resolution, satellite-derived dataset of near-surface air temperatures for the Arctic sea-ice region (1982-2020). We use it as a benchmark to reevaluate climate reanalyses and model simulations in CMIP6 (Coupled Model Intercomparison Project 6). We find that the CMIP6 simulations in the central Arctic, with generally thicker ice and snow, align well with satellite observations, with an annual mean bias of less than +/- 1 degrees C over sea ice. By contrast, climate reanalyses like ERA5 exhibit widespread warm biases exceeding 2 degrees C in the same region. We conclude that reliance on ERA5 reanalysis as a reference may have led to an underestimation of climate model reliability in the Arctic region. Climate model simulations of central Arctic surface temperatures, which were thought to be biased low, are more accurate than appreciated, whereas the benchmark data from observation-based reanalyses are biased warm, according to comparisons with an independent satellite-based dataset.
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Meteorology & Atmospheric Sciences
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:001176543000001
来源期刊	COMMUNICATIONS EARTH & ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/294773
作者单位	Danish Meteorological Institute DMI; Technical University of Denmark
推荐引用方式 GB/T 7714	Tian, Tian,Yang, Shuting,Hoyer, Jacob Lorentsen,et al. Cooler Arctic surface temperatures simulated by climate models are closer to satellite-based data than the ERA5 reanalysis[J],2024,5(1).
APA	Tian, Tian,Yang, Shuting,Hoyer, Jacob Lorentsen,Nielsen-Englyst, Pia,&Singha, Suman.(2024).Cooler Arctic surface temperatures simulated by climate models are closer to satellite-based data than the ERA5 reanalysis.COMMUNICATIONS EARTH & ENVIRONMENT,5(1).
MLA	Tian, Tian,et al."Cooler Arctic surface temperatures simulated by climate models are closer to satellite-based data than the ERA5 reanalysis".COMMUNICATIONS EARTH & ENVIRONMENT 5.1(2024).