气候变化领域集成服务门户(CCPortal): A hindcast approach to diagnosing the equatorial Pacific cold tongue SST bias in CESM1

CCPortal

DOI	10.1175/JCLI-D-19-0513.1
	A hindcast approach to diagnosing the equatorial Pacific cold tongue SST bias in CESM1
	Siongco A.C.; Ma H.-Y.; Klein S.A.; Xie S.; Karspeck A.R.; Raeder K.; Anderson J.L.
发表日期	2020
ISSN	0894-8755
起始页码	1437
结束页码	1453
卷号	33 期号:4
英文摘要	An ensemble seasonal hindcast approach is used to investigate the development of the equatorial Pacific Ocean cold sea surface temperature (SST) bias and its characteristic annual cycle in the Community Earth System Model, version 1 (CESM1). In observations, eastern equatorial Pacific SSTs exhibit a warm phase during boreal spring and a cold phase during late boreal summer–autumn. The CESM1 climatology shows a cold bias during both warm and cold phases. In our hindcasts, the cold bias during the cold phase develops in less than 6 months, whereas the cold bias during the warm phase takes longer to emerge. The fast-developing cold-phase cold bias is associated with too-strong vertical advection and easterly wind stress over the eastern equatorial region. The antecedent boreal summer easterly wind anomalies also appear in atmosphere-only simulations, indicating that the errors are intrinsic to the atmosphere component. For the slower-developing warm-phase cold bias, we find that the too-cold SSTs over the equatorial region are associated with a slowly evolving upward displacement of subsurface ocean zonal currents and isotherms that can be traced to the ocean component. © 2020 American Meteorological Society.
英文关键词	Surface waters; Atmosphere components; Earth system model; Eastern equatorial Pacific; Equatorial Pacific; Equatorial Pacific Ocean; Equatorial regions; Sea surface temperature (SST); Vertical advection; Ocean currents; advection; autumn; climatology; easterly wave; ensemble forecasting; hindcasting; oceanic current; sea surface temperature; seasonal variation; spring (season); summer; wind stress; Pacific Ocean; Pacific Ocean (Equatorial)
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/171444
作者单位	Lawrence Livermore National Laboratory, Livermore, CA, United States; National Center for Atmospheric Research, Boulder, CO, United States
推荐引用方式 GB/T 7714	Siongco A.C.,Ma H.-Y.,Klein S.A.,et al. A hindcast approach to diagnosing the equatorial Pacific cold tongue SST bias in CESM1[J],2020,33(4).
APA	Siongco A.C..,Ma H.-Y..,Klein S.A..,Xie S..,Karspeck A.R..,...&Anderson J.L..(2020).A hindcast approach to diagnosing the equatorial Pacific cold tongue SST bias in CESM1.Journal of Climate,33(4).
MLA	Siongco A.C.,et al."A hindcast approach to diagnosing the equatorial Pacific cold tongue SST bias in CESM1".Journal of Climate 33.4(2020).