气候变化领域集成服务门户(CCPortal): The effect of atmospheric transmissivity on model and observational estimates of the sea ice albedo feedback

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DOI	10.1175/JCLI-D-19-0674.1
	The effect of atmospheric transmissivity on model and observational estimates of the sea ice albedo feedback
	Donohoe A.; Blanchard-Wrigglesworth E.; Schweiger A.; Rasch P.J.
发表日期	2020
ISSN	0894-8755
起始页码	5743
结束页码	5765
卷号	33 期号:13
英文摘要	The sea ice-albedo feedback (SIAF) is the product of the ice sensitivity (IS), that is, how much the surface albedo in sea ice regions changes as the planet warms, and the radiative sensitivity (RS), that is, how much the top-of-atmosphere radiation changes as the surface albedo changes. We demonstrate that the RS calculated from radiative kernels in climate models is reproduced from calculations using the ‘‘approximate partial radiative perturbation’’ method that uses the climatological radiative fluxes at the top of the atmosphere and the assumption that the atmosphere is isotropic to shortwave radiation. This method facilitates the comparison of RS from satellite-based estimates of climatological radiative fluxes with RS estimates across a full suite of coupled climate models and, thus, allows model evaluation of a quantity important in characterizing the climate impact of sea ice concentration changes. The satellite-based RS is within the model range of RS that differs by a factor of 2 across climate models in both the Arctic and Southern Ocean. Observed trends in Arctic sea ice are used to estimate IS, which, in conjunction with the satellite-based RS, yields an SIAF of 0.16 6 0.04 W m22 K21. This Arctic SIAF estimate suggests a modest amplification of future global surface temperature change by approximately 14% relative to a climate system with no SIAF. We calculate the global albedo feedback in climate models using model-specific RS and IS and find a model mean feedback parameter of 0.37 W m22 K21, which is 40% larger than the IPCC AR5 estimate based on using RS calculated from radiative kernel calculations in a single climate model. © 2020 American Meteorological Society.
英文关键词	Climate change; Satellites; Sea ice; Solar radiation; Atmospheric transmissivity; Coupled climate model; Global surface temperature; Radiative perturbation; Sea ice concentration; Short-wave radiation; Surface albedo change; Top of the atmospheres; Climate models; albedo; climate modeling; climatology; radiative forcing; sea ice; shortwave radiation; top of atmosphere; Arctic Ocean; Southern Ocean
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171263
作者单位	Applied Physics Laboratory, University of Washington, Seattle, WA, United States; Department of Atmospheric Sciences, University of Washington,, Seattle, WA, United States; Polar Science Center, Applied Physics Laboratory, University of Washington, Seattle, WA, United States; Pacific Northwest National Laboratory, Richland, WA, United States
推荐引用方式 GB/T 7714	Donohoe A.,Blanchard-Wrigglesworth E.,Schweiger A.,et al. The effect of atmospheric transmissivity on model and observational estimates of the sea ice albedo feedback[J],2020,33(13).
APA	Donohoe A.,Blanchard-Wrigglesworth E.,Schweiger A.,&Rasch P.J..(2020).The effect of atmospheric transmissivity on model and observational estimates of the sea ice albedo feedback.Journal of Climate,33(13).
MLA	Donohoe A.,et al."The effect of atmospheric transmissivity on model and observational estimates of the sea ice albedo feedback".Journal of Climate 33.13(2020).