气候变化领域集成服务门户(CCPortal): Convective Boundary Layer Control of the Sea Surface Temperature in the Tropics

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DOI	10.1029/2019MS001988
	Convective Boundary Layer Control of the Sea Surface Temperature in the Tropics
	Hourdin F.; Rio C.; Jam A.; Traore A.-K.; Musat I.
发表日期	2020
ISSN	19422466
卷号	12 期号:6
英文摘要	Using successive versions of a global climate model, we show how convective transport to the free troposphere of the humidity evaporated at the surface or, reciprocally, entrainment of dry air from the free troposphere into the mixed layer, controls surface evaporative cooling and then sea surface temperature. This control is as important as the radiative effect of boundary layer clouds on radiation. Those aspects are shown to be improved when activating a mass flux representation of the organized structures of the convective boundary layer coupled to eddy diffusion, the so-called “thermal plume model,” leading to an increased near-surface drying compared to the use of turbulent diffusion alone. Controlling detrainment by air properties from just above the boundary layer allows the thermal plume model to be valid for both cumulus and stratocumulus regimes, improving the contrast in near-surface humidity between the trade winds region and East Tropical oceans. Using pairs of stand-alone atmospheric simulations forced by sea surface temperature and of coupled atmosphere-ocean simulations, we show how the improvement of the surface fluxes that arise from this improved physics projects into an improvement of the representation of sea surface temperature patterns in the coupled model, and in particular into a reduction of the East Tropical Ocean warm bias. The work presented here led to the bias reduction in sea surface temperature in the Institute Pierre Simon Laplace coupled model, IPSL-CM6A, developed recently for the 6th phase of the Coupled Model Intercomparison Project, CMIP6. ©2020. The Authors.
英文关键词	convective boundary layer; SST warm biases; stratocumulus clouds
语种	英语
scopus关键词	Air entrainment; Atmospheric humidity; Atmospheric thermodynamics; Boundary layer flow; Boundary layers; Climate models; Clouds; Evaporative cooling systems; Humidity control; Oceanography; Submarine geophysics; Surface properties; Surface waters; Thermal plumes; Tropics; Troposphere; Atmospheric simulations; Boundary layer clouds; Convective boundary layers; Convective transport; Coupled Model Intercomparison Project; Global climate model; Organized structure; Sea surface temperature (SST); Atmospheric temperature; atmosphere-ocean coupling; climate modeling; CMIP; convective boundary layer; cumulus; global climate; mixed layer; sea surface temperature; stratocumulus; tropical environment; troposphere
来源期刊	Journal of Advances in Modeling Earth Systems
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/156702
作者单位	Laboratoire de Météorologie Dynamique/IPSL/Sorbone Universités/CNRS, UMR 8539, Paris, France; CNRM (UMR 3589 CNRS and Meteo-France), Toulouse, France
推荐引用方式 GB/T 7714	Hourdin F.,Rio C.,Jam A.,et al. Convective Boundary Layer Control of the Sea Surface Temperature in the Tropics[J],2020,12(6).
APA	Hourdin F.,Rio C.,Jam A.,Traore A.-K.,&Musat I..(2020).Convective Boundary Layer Control of the Sea Surface Temperature in the Tropics.Journal of Advances in Modeling Earth Systems,12(6).
MLA	Hourdin F.,et al."Convective Boundary Layer Control of the Sea Surface Temperature in the Tropics".Journal of Advances in Modeling Earth Systems 12.6(2020).