气候变化领域集成服务门户(CCPortal): Drivers of local ocean heat content variability in ECCOv4

CCPortal

DOI	10.1175/JCLI-D-20-0058.1
	Drivers of local ocean heat content variability in ECCOv4
	Tesdal J.-E.; Abernathey R.P.
发表日期	2021
ISSN	08948755
起始页码	2941
结束页码	2956
卷号	34 期号:8
英文摘要	Variation in upper-ocean heat content is a critical factor in understanding global climate variability. Using temperature anomaly budgets in a two-decade-long physically consistent ocean state estimate (ECCOv4r3; 1992-2015), we describe the balance between atmospheric forcing and ocean transport mechanisms for different depth horizons and at varying temporal and spatial resolutions. Advection dominates in the tropics, while forcing is most relevant at higher latitudes and in parts of the subtropics, but the balance of dominant processes changes when integrating over greater depths and considering longer time scales. While forcing is shown to increase with coarser resolution, overall the heat budget balance between it and advection is remarkably insensitive to spatial scale. A novel perspective on global ocean heat content variability was made possible by combining unsupervised classification with a measure of temporal variability in heat budget terms to identify coherent dynamical regimes with similar underlying mechanisms, which are consistent with prior research. The vast majority of the ocean includes significant contributions by both forcing and advection. However advection-driven regions were identified that coincide with strong currents, such as western boundary currents, the Antarctic Circumpolar Current, and the tropics, while forcing-driven regions were defined by shallower wintertime mixed layers and weak velocity fields. This identification of comprehensive dynamical regimes and the sensitivity of the ocean heat budget analysis to exact resolution (for different depth horizons and at varying temporal and spatial resolutions) should provide a useful orientation for future studies of ocean heat content variability in specific ocean regions. © 2021 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright
英文关键词	Atmosphere-ocean interaction; Clustering; Interannual variability; Ocean; Ocean dynamics; Oceanic variability; Reanalysis data
语种	英语
scopus关键词	Advection; Atmospheric movements; Enthalpy; Ocean currents; Tropics; Velocity; Antarctic Circumpolar Currents; Atmospheric forcing; Heat-budget balance; Temperature anomaly; Temporal and spatial; Temporal variability; Unsupervised classification; Western boundary currents; Budget control; air-sea interaction; annual variation; atmospheric forcing; climate variation; cluster analysis; heat budget; oceanic current; spatiotemporal analysis; temperature anomaly; temporal variation; transport process
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/178649
作者单位	Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States
推荐引用方式 GB/T 7714	Tesdal J.-E.,Abernathey R.P.. Drivers of local ocean heat content variability in ECCOv4[J],2021,34(8).
APA	Tesdal J.-E.,&Abernathey R.P..(2021).Drivers of local ocean heat content variability in ECCOv4.Journal of Climate,34(8).
MLA	Tesdal J.-E.,et al."Drivers of local ocean heat content variability in ECCOv4".Journal of Climate 34.8(2021).