气候变化领域集成服务门户(CCPortal): Cross-spectral analysis of the SST/10-m wind speed coupling resolved by satellite products and climate model simulations

CCPortal

DOI	10.1007/s00382-018-4434-6
	Cross-spectral analysis of the SST/10-m wind speed coupling resolved by satellite products and climate model simulations
	Laurindo L.C.; Siqueira L.; Mariano A.J.; Kirtman B.P.
发表日期	2019
ISSN	0930-7575
起始页码	5071
结束页码	5098
卷号	52 期号:2020-09-10
英文摘要	This study aims to determine the spatial–temporal scales where the SST forcing of the near-surface winds takes places, and its relationship with the action of coherent ocean eddies. Here, cross-spectral statistics are used to examine the relationship between satellite-based SST and 10-m wind speed (w) fields at scales between 102–104 km and 101–103 days. It is shown that the transition from negative SST/w correlations at large-scales to positive at oceanic mesoscales occurs at wavelengths coinciding with the atmospheric first baroclinic Rossby radius of deformation; and that the dispersion of positively-correlated signals resembles tropical instability waves near the equator, and Rossby waves in the extratropics. Transfer functions are used to estimate the SST-driven w response in physical space (wc), a signal that explains 5–40% of the mesoscale w variance in the equatorial cold tongues, and 2–15% at extratropical SST fronts. The signature of ocean eddies is clearly visible in wc, accounting for 20–60% of its variability in eddy-rich regions. To provide further insight on the role of ocean eddies in the SST-driven coupling, the analysis is repeated for two climate model (CCSM) simulations using ocean grid resolutions of 1 ∘ (eddy-parameterized, LR) and 0. 1 ∘ (eddy-resolving, HR). The lack of resolved eddies in LR leads to a significantly underestimated mesoscale w variance relative to HR. Conversely, the wc variability in HR can exceed the satellite estimates by a factor of two at extratropical SST fronts and underestimate it by a factor of almost six near the equator, reflecting shortcomings of the CCSM to be addressed in its future developments. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Air–sea interaction; Climate modeling; Cross-spectral analysis; Mesoscale ocean eddies; Oceanic Rossby waves; Satellite observations
语种	英语
scopus关键词	air-sea interaction; climate modeling; computer simulation; marine atmosphere; mesoscale eddy; Rossby wave; satellite data; sea surface temperature; spectral analysis; transfer function; wind velocity
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/146354
作者单位	Rosenstiel School of Marine and Atmospheric Science, University of Miami, 4600 Rickenbacker Causeway, Miami, FL 33149, United States
推荐引用方式 GB/T 7714	Laurindo L.C.,Siqueira L.,Mariano A.J.,et al. Cross-spectral analysis of the SST/10-m wind speed coupling resolved by satellite products and climate model simulations[J],2019,52(2020-09-10).
APA	Laurindo L.C.,Siqueira L.,Mariano A.J.,&Kirtman B.P..(2019).Cross-spectral analysis of the SST/10-m wind speed coupling resolved by satellite products and climate model simulations.Climate Dynamics,52(2020-09-10).
MLA	Laurindo L.C.,et al."Cross-spectral analysis of the SST/10-m wind speed coupling resolved by satellite products and climate model simulations".Climate Dynamics 52.2020-09-10(2019).