Importance of Resolving Mesoscale Eddies in the Model Simulation of Ningaloo Nino

doi:10.1029/2020GL087998

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋环流与波动重点实验室

	Importance of Resolving Mesoscale Eddies in the Model Simulation of Ningaloo Nino
	Guo, Yaru 2,3; Li, Yuanlong 2,4,5,6; Wang, Fan 2,4,5; Wei, Yuntao 7; Xia, Qiong 1,8
刊名	GEOPHYSICAL RESEARCH LETTERS
	2020-07-28
卷号	47 期号:14 页码:10
ISSN号	0094-8276
DOI	10.1029/2020GL087998
通讯作者	Li, Yuanlong(liyuanlong@qdio.ac.cn)
英文摘要	Satellite observational data and a regional ocean model are used to understand the evolution of Ningaloo Nino (NN) anomalies near Western Australian coast. In observation and high-resolution (similar to 3 km) simulations, coastally trapped positive sea level anomalies (SLAs), originated largely from the Indonesian Throughflow, are transmitted westward by mesoscale eddies. Few eddies propagate long distances offshore due to dissipation, and as a result NN signatures are predominantly confined near the coast. In coarse-resolution (similar to 100 km) simulations that cannot resolve eddies, oceanic anomalies propagate swiftly as long Rossby waves with much weaker dissipation and more anomalies spread to the ocean interior. Eddy-enhanced surface warming promotes surface latent heat release and mesoscale air-sea interactions, which acts to damp NN surface warming. These processes are not resolved by coarse-resolution models. This study highlights the importance of resolving mesoscale oceanic processes in the simulation and prediction of NN. Plain Language Summary Ningaloo Nino (NN) is a surface warming surge phenomenon of the southeast Indian Ocean. Here we describe how NN anomalies develop in high- (similar to 3 km) and low-resolution (similar to 100 km) ocean model simulations. We found that in high-resolution simulations and observational data, the sea level rise and warming of the NN spread offshore as eddies with wavelengths of 10-500 km. Because eddies move slowly and are subjected to strong dissipation, NN anomalies cannot spread long distance offshore and tend to concentrate near the west coast of Australia. However, these eddies are not resolved in low-resolution simulations. Instead, NN anomalies travel westward quickly as long free Rossby waves without obvious dissipation. Eddies also enhance local surface warming anomalies and cause strong latent heat loss, leaving impacts on the local climate. These processes are absent in low-resolution simulations. Therefore, it seems necessary to take into account effects of oceanic mesoscale eddies (OMEs) in the simulation and prediction of NN.
资助项目	National Key R&D Program of China[2019YFA0606702] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB42000000] ; National Natural Science Foundation of China (NSFC)[41776001] ; National Natural Science Foundation of China (NSFC)[41806001]
WOS研究方向	Geology
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000556707300062
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/168111]
专题	海洋研究所_海洋环流与波动重点实验室
通讯作者	Li, Yuanlong
作者单位	1.Guangdong Ocean Univ, Dept Marine Technol, Zhanjiang, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China 3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China 4.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao, Peoples R China 5.Qingdao Natl Lab Marine Sci & Technol, Funct Lab Ocean Dynam & Climate, Qingdao, Peoples R China 6.CAS Ctr Excellence Quaternary Sci & Global Change, Xian, Peoples R China 7.Univ Utah, Dept Atmospher Sci, Salt Lake City, UT USA 8.Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai, Peoples R China
推荐引用方式 GB/T 7714	Guo, Yaru,Li, Yuanlong,Wang, Fan,et al. Importance of Resolving Mesoscale Eddies in the Model Simulation of Ningaloo Nino[J]. GEOPHYSICAL RESEARCH LETTERS,2020,47(14):10.
APA	Guo, Yaru,Li, Yuanlong,Wang, Fan,Wei, Yuntao,&Xia, Qiong.(2020).Importance of Resolving Mesoscale Eddies in the Model Simulation of Ningaloo Nino.GEOPHYSICAL RESEARCH LETTERS,47(14),10.
MLA	Guo, Yaru,et al."Importance of Resolving Mesoscale Eddies in the Model Simulation of Ningaloo Nino".GEOPHYSICAL RESEARCH LETTERS 47.14(2020):10.