气候变化领域集成服务门户(CCPortal): Observed structural relationships between ocean chlorophyll variability and its heating effects on the ENSO

CCPortal

DOI	10.1007/s00382-019-04844-8
	Observed structural relationships between ocean chlorophyll variability and its heating effects on the ENSO
	Zhang R.-H.; Tian F.; Zhi H.; Kang X.
发表日期	2019
ISSN	0930-7575
起始页码	5165
结束页码	5186
卷号	53 期号:2020-09-10
英文摘要	Ocean chlorophyll (Chl)-induced heating can affect the climate system through the penetration of solar radiation in the upper ocean. Currently, the ocean biology-induced heating (OBH) feedback effects on the climate in the tropical Pacific are still not well understood, and the mechanisms regarding how SST is modulated remain elusive. In this paper, chlorophyll (Chl) data from satellites are combined with physical fields from Argo profiles to estimate OBH-related fields, including the penetration depth (Hp) and the ocean mixed-layer (ML) depth (Hm). In addition, some directly related heating terms with Hm and Hp are diagnosed, including the absorbed solar radiation component within the ML (denoted as Qabs), the rate of ML temperature changes that are directly induced by Qabs (denoted as Rsr = Qabs/(ρ0CpHm)), and the portion of solar radiation that penetrates through the bottom of the ML (denoted as Qpen). The structural relationships between these related fields are examined to illustrate how these heating terms are affected by Hp and Hm. The extent to which Rsr and Qpen are modulated by Hp is strikingly different during ENSO cycles. In the western-central equatorial Pacific, inter-annual variations in Hp tend to be out of phase with those in Hm. A decrease (increase) in Qabs from a positive (negative) Hp anomaly during El Niño (La Niña) tends to be offset by a negative (positive) Hm anomaly. Thus, Rsr is not closely related with Hp, even though Qabs is highly correlated with Hp, indicating that the direct thermal effect through Qabs is not a dominant factor that affects the SST. In contrast, the inter-annual variability of Qpen in the region is significantly enhanced by that of Hp, with their high positive correlation. The Hp-induced differential heating in the ML and subsurface layers from the Qpen and Qabs terms modifies the thermal contrast, stratification and vertical mixing, which represent a dominant indirect ocean dynamical effect on the SST. The revealed relationships between these related fields provide an observational basis for gaining structural insights into the OBH feedback effects and validating model simulations in the tropical Pacific. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Chlorophyll variability; ENSO modulations; Ocean biology-induced heating; Satellite and Argo data; The penetration depth and mixed layer depth
语种	英语
scopus关键词	air-sea interaction; annual variation; Argo; chlorophyll; El Nino-Southern Oscillation; mixed layer; satellite data; sea surface temperature; solar radiation
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/145924
作者单位	CAS Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, 266071, China; Center for Excellence in Quaternary Science and Global Change, Chinese Academy of Sciences, Xi’an, 710061, China; Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266237, China; University of Chinese Academy of Sciences, Beijing, 10029, China; College of Atmospheric Sciences, Nanjing University of Information Science and Technology, Nanjing, 210044, China; College of Air Traffic Management, Civil Aviation Flight University of China, Guanghan, 618307, China
推荐引用方式 GB/T 7714	Zhang R.-H.,Tian F.,Zhi H.,et al. Observed structural relationships between ocean chlorophyll variability and its heating effects on the ENSO[J],2019,53(2020-09-10).
APA	Zhang R.-H.,Tian F.,Zhi H.,&Kang X..(2019).Observed structural relationships between ocean chlorophyll variability and its heating effects on the ENSO.Climate Dynamics,53(2020-09-10).
MLA	Zhang R.-H.,et al."Observed structural relationships between ocean chlorophyll variability and its heating effects on the ENSO".Climate Dynamics 53.2020-09-10(2019).