气候变化领域集成服务门户(CCPortal): The southeastern tropical atlantic sst bias investigated with a coupled atmosphere-ocean single-column model at a pirata mooring site

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DOI	10.1175/JCLI-D-19-0608.1
	The southeastern tropical atlantic sst bias investigated with a coupled atmosphere-ocean single-column model at a pirata mooring site
	Deppenmeier A.-L.; Haarsma R.J.; van Heerwaarden C.; Hazeleger W.
发表日期	2020
ISSN	0894-8755
起始页码	6255
结束页码	6271
卷号	33 期号:14
英文摘要	Warm sea surface temperature (SST) biases in the tropical Atlantic Ocean form a longstanding problem in coupled general circulation models (CGCMs). Considerable efforts to understand the origins of these biases and alleviate them have been undertaken, but state-of-the-art CGCMs still suffer from biases that are very similar to those of the generation of models before. In this study, we use a powerful combination of in situ moored buoy observations and a new coupled ocean-atmosphere single-column model (SCM) with parameterization that is identical to that of a three-dimensional CGCM to investigate the SST bias. We place the SCM at the location of a Prediction and Research Moored Array in the Tropical Atlantic (PIRATA) mooring in the southeastern tropical Atlantic, where large SST biases occur in CGCMs. The SCM version of the EC-Earth state-of-the-art coupled GCM performs well for the first five days of the simulation. Then, it develops an SST bias that is very similar to that of its three-dimensional counterpart. Through a series of sensitivity experiments we demonstrate that the SST bias can be reduced by 70%. We achieve this result by enhancing the turbulent vertical ocean mixing efficiency in the ocean parameterization scheme. The under-representation of vertical mixing in three-dimensional CGCMs is a candidate for causing the warm SST bias. We further show that surface shortwave radiation does not cause the SST bias at the location of the PIRATA mooring. Rather, a warm atmospheric near-surface temperature bias and a wet moisture bias contribute to it. Strongly nudging the atmosphere to profiles from reanalysis data reduces the SST bias by 40%. © 2020 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses).
英文关键词	Atmospheric temperature; Atmospheric thermodynamics; Mixing; Mooring; Surface properties; Surface waters; Tropics; Buoy observations; Coupled general circulation models; Near surface temperature; Ocean atmosphere; Parameterization schemes; Short-wave radiation; Single-column model; Tropical atlantic; Oceanography; air-sea interaction; general circulation model; parameterization; sea surface temperature; shortwave radiation; vertical mixing; Atlantic Ocean; Atlantic Ocean (Tropical); Pirata
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/171233
作者单位	Research and Development of Weather and Climate Models, Royal Dutch Meteorological Institute, De Bilt, Netherlands; Meteorology and Air Quality, Wageningen University, Wageningen, Netherlands; Faculty of Geosciences, Utrecht University, Utrecht, Netherlands
推荐引用方式 GB/T 7714	Deppenmeier A.-L.,Haarsma R.J.,van Heerwaarden C.,et al. The southeastern tropical atlantic sst bias investigated with a coupled atmosphere-ocean single-column model at a pirata mooring site[J],2020,33(14).
APA	Deppenmeier A.-L.,Haarsma R.J.,van Heerwaarden C.,&Hazeleger W..(2020).The southeastern tropical atlantic sst bias investigated with a coupled atmosphere-ocean single-column model at a pirata mooring site.Journal of Climate,33(14).
MLA	Deppenmeier A.-L.,et al."The southeastern tropical atlantic sst bias investigated with a coupled atmosphere-ocean single-column model at a pirata mooring site".Journal of Climate 33.14(2020).