气候变化领域集成服务门户(CCPortal): The Impact of Climate Change on Ocean Submesoscale Activity

CCPortal

DOI	10.1029/2020JC016750
	The Impact of Climate Change on Ocean Submesoscale Activity
	Richards K.J.; Whitt D.B.; Brett G.; Bryan F.O.; Feloy K.; Long M.C.
发表日期	2021
ISSN	21699275
卷号	126 期号:5
英文摘要	Global warming may modify submesoscale activity in the ocean through changes in the mixed layer depth (MLD) and lateral buoyancy gradients. As a case study we consider a region in the NE Atlantic under present and future climate conditions, using a time-slice method and global and nested regional ocean models. The high resolution regional model reproduces the strong seasonal cycle in submesoscale activity observed under present-day conditions. Focusing on the well-resolved winter months, in the future, with a reduction in the MLD, there is a substantial reduction in submesoscale activity, an associated decrease in kinetic energy (KE) at the mesoscale, and the vertical buoyancy flux induced by submesoscale activity is reduced by a factor of 2. When submesoscale activity is suppressed, by increasing the parameterized lateral mixing in the model, the climate change induces a larger reduction in winter MLDs while there is less of a change in KE at the mesoscale. A scaling for the vertical buoyancy flux proposed by (Fox-Kemper et al., 2008; doi:10.1175/2007JPO3792.1) based on the properties of mixed layer instability (MLI), is found to capture much of the seasonal and future changes to the flux in terms of regional averages as well as the spatial structure, although it over predicts the reduction in the flux in the winter months. The vertical buoyancy flux when the mixed layer is relatively shallow is significantly greater than that given by the scaling based on MLI, suggesting during these times other processes (besides MLI) may dominate submesoscale buoyancy fluxes. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	climate change; submesoscale; vertical fluxes
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186330
作者单位	International Pacific Research Center, University of Hawai'i at Mānoa, Honolulu, HI, United States; Department of Oceanography, University of Hawai'i at Mānoa, Honolulu, HI, United States; National Center for Atmospheric Research, Boulder, CO, United States; NASA Ames Research Center, Moffett Field, CA, United States
推荐引用方式 GB/T 7714	Richards K.J.,Whitt D.B.,Brett G.,et al. The Impact of Climate Change on Ocean Submesoscale Activity[J],2021,126(5).
APA	Richards K.J.,Whitt D.B.,Brett G.,Bryan F.O.,Feloy K.,&Long M.C..(2021).The Impact of Climate Change on Ocean Submesoscale Activity.Journal of Geophysical Research: Oceans,126(5).
MLA	Richards K.J.,et al."The Impact of Climate Change on Ocean Submesoscale Activity".Journal of Geophysical Research: Oceans 126.5(2021).