气候变化领域集成服务门户(CCPortal): Understanding the bias in surface latent and sensible heat fluxes in contemporary AGCMs over tropical oceans

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DOI	10.1007/s00382-020-05431-y
	Understanding the bias in surface latent and sensible heat fluxes in contemporary AGCMs over tropical oceans
	Zhou X.; Ray P.; Barrett B.S.; Hsu P.-C.
发表日期	2020
ISSN	0930-7575
起始页码	2957
结束页码	2978
卷号	55
英文摘要	The performance of 20 models participating in the atmospheric model intercomparison project (AMIP) is evaluated concerning surface latent (QLH) and sensible (QSH) heat flux over the tropical oceans (30°S–30°N). Biases were calculated by comparing model fluxes to observations from moored buoys and the objectively analyzed air–sea fluxes (OAFlux) database. All 20 AMIP models overestimate QLH with an ensemble mean bias of 20 W m−2, and 18 of the 20 models overestimate QSH with an ensemble mean bias of 5 W m−2 when compared to OAFlux, implying a systematic positive bias over the tropical oceans. A comparison with buoy observations also showed similar biases. To obtain insights into the causes behind model bias, we quantified the contribution from near-surface winds, specific humidity, and temperatures. It is found that near-surface humidity contributes more to the bias in QLH than wind speed, while air temperature contributes more to bias in QSH than wind speed. On the other hand, the root mean squared error (RMSE) in QLH has contributions from both near-surface humidity and wind. The contribution from humidity to the mean bias in QLH is 13 W m−2, with RMSE of 15 W m−2, suggesting a systematic overestimation of sea-air humidity difference in models. The model ensemble, in general, simulates QLH and QSH better than individual models. Models with higher horizontal and vertical resolutions perform better than coarse resolution models. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	AMIP; Latent heat flux; Sensible heat flux; Surface heat flux
语种	英语
scopus关键词	air temperature; atmospheric general circulation model; atmospheric modeling; humidity; latent heat flux; marine atmosphere; sensible heat flux; surface temperature; tropical region; wind field
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/145268
作者单位	Meteorology, Florida Institute of Technology, Melbourne, FL 32904, United States; US Naval Academy, Annapolis, MD, United States; International Laboratory on Climate and Environment Change and Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science and Technology, Nanjing, China
推荐引用方式 GB/T 7714	Zhou X.,Ray P.,Barrett B.S.,et al. Understanding the bias in surface latent and sensible heat fluxes in contemporary AGCMs over tropical oceans[J],2020,55.
APA	Zhou X.,Ray P.,Barrett B.S.,&Hsu P.-C..(2020).Understanding the bias in surface latent and sensible heat fluxes in contemporary AGCMs over tropical oceans.Climate Dynamics,55.
MLA	Zhou X.,et al."Understanding the bias in surface latent and sensible heat fluxes in contemporary AGCMs over tropical oceans".Climate Dynamics 55(2020).