气候变化领域集成服务门户(CCPortal): Energy flow diagnosis of ENSO from an ocean reanalysis

CCPortal

DOI	10.1175/JCLI-D-20-0704.1
	Energy flow diagnosis of ENSO from an ocean reanalysis
	Toyoda T.; Nakano H.; Aiki H.; Ogata T.; Fukutomi Y.; Kanno Y.; Urakawa L.S.; Sakamoto K.; Yamanaka G.; Nagura M.
发表日期	2021
ISSN	08948755
起始页码	4023
结束页码	4042
卷号	34 期号:10
英文摘要	A method is introduced for diagnosing the time evolution of wave energy associated with ENSO from an ocean reanalysis. In the diagnosis, time changes of kinetic and available potential energy are mainly represented by energy inputs caused by surface wind stress and horizontal energy fluxes for each vertically decomposed normal mode. The resulting time evolutions of the wave energy and vertical thermocline displacements in the 1997/98 and 2014–16 El Niño events are consistent with our previous knowledge of these events. Further, our result indicated that representation of several vertical modes is necessary to reproduce the broadly distributed downward thermocline displacements in the central to eastern equatorial Pacific, generated by a westerly wind event in the western equatorial Pacific (e.g., in March 1997), that are preconditioning for El Niño development. In addition, we investigated the wave energy budget, including the influence of data assimilation, on the complicated time evolution of equatorial thermocline displacements caused by repeated westerly and easterly wind events during the 2014–16 El Niño event. Our result suggests that noise from a momentum imbalance near the equator associated with data assimilation, which possibly affected the El Niño prediction failure in 2014, was much reduced by our developed ocean data assimilation system and reanalysis. This study, which provides a new connection between the theoretical works and reanalysis products that use sophisticated systems for synthesizing OGCMs and observations, should be useful for climate research and operational communities interested in ENSO. © 2021 American Meteorological Society.
英文关键词	Data assimilation; El Niño; Energy transport; ENSO; Ocean models; Seasonal forecasting
语种	英语
scopus关键词	Budget control; Potential energy; Stream flow; Wave energy conversion; Climate research; Data assimilation; Eastern equatorial Pacific; Equatorial Pacific; Ocean data assimilation; Operational community; Sophisticated system; Surface wind stress; Climatology
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/178575
作者单位	Department of Atmosphere, Ocean and Earth System Modeling Research, Meteorological Research Institute, Japan Meteorological Agency, Tsukuba, Japan; Institute for Space–Earth Environmental Research, Nagoya University, Nagoya, Japan; Application Laboratory, Japan Agency for Marine–Earth Science and Technology (JAMSTEC), Yokohama, Japan; Environmental Science Research Laboratory, Central Research Institute of Electric Power Industry, Abiko, Japan; Global Ocean Observation Research Center, Research Institute for Global Change, JAMSTEC, Yokosuka, Japan
推荐引用方式 GB/T 7714	Toyoda T.,Nakano H.,Aiki H.,et al. Energy flow diagnosis of ENSO from an ocean reanalysis[J],2021,34(10).
APA	Toyoda T..,Nakano H..,Aiki H..,Ogata T..,Fukutomi Y..,...&Nagura M..(2021).Energy flow diagnosis of ENSO from an ocean reanalysis.Journal of Climate,34(10).
MLA	Toyoda T.,et al."Energy flow diagnosis of ENSO from an ocean reanalysis".Journal of Climate 34.10(2021).