气候变化领域集成服务门户(CCPortal): Cross-Shore Flow and Implications for Carbon Export in the California Current Ecosystem: A Lagrangian Analysis

CCPortal

DOI	10.1029/2020JC016611
	Cross-Shore Flow and Implications for Carbon Export in the California Current Ecosystem: A Lagrangian Analysis
	Chabert P.; d'Ovidio F.; Echevin V.; Stukel M.R.; Ohman M.D.
发表日期	2021
ISSN	21699275
卷号	126 期号:2
英文摘要	Eastern Boundary Current Upwelling Systems are regions of elevated primary production and carbon export and thus play a central role in the global carbon cycle. In these regions, nutrient upwelling occurs in a narrow region close to the coast, but primary production and carbon export are typically observed across a broader region. The fact that productive waters reach the open ocean has important consequences for the biological carbon pump, because such transport connects nutrient sources close to the coast to the deep carbon sinks of the offshore ocean. However, many aspects of this offshore transport are still not known. Here we address seasonal and interannual variability of upwelling-related cross-shore flows in the California current ecosystem (CCE) by employing Lagrangian diagnostics of horizontal transport inferred from satellite data. We define an advective age as the time a water parcel flowed offshore of the 500 m isobath. We find that the offshore extension of high Chl-a waters covaries with the age of a coastal water parcel, and is consistent with mesoscale circulation. Interannual variability in the offshore extent of older waters is primarily driven by mesoscale variability and covaries with large scale forcing by both ENSO and the NPGO. The measured ratio of in-situ new production: carbon export also covaries with water age, and tends to be ≫ 1 in younger and more balanced in older waters. Our results may help to parameterize the role of the finescale on the export of carbon in upwelling regions for climate resolving models. © 2020. American Geophysical Union. All Rights Reserved.
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/186495
作者单位	Sorbonne Université, CNRS, IRD, MNHN, Laboratoire d'Océanographie et du Climat: Expérimentations et Approches Numériques (LOCEAN-IPSL), Paris, France; Department of Earth, Ocean, and Atmospheric Sciences, Florida State University, Tallahassee, FL, United States; Integrative Oceanography Division, Scripps Institution of Oceanography, La Jolla, CA, United States
推荐引用方式 GB/T 7714	Chabert P.,d'Ovidio F.,Echevin V.,et al. Cross-Shore Flow and Implications for Carbon Export in the California Current Ecosystem: A Lagrangian Analysis[J],2021,126(2).
APA	Chabert P.,d'Ovidio F.,Echevin V.,Stukel M.R.,&Ohman M.D..(2021).Cross-Shore Flow and Implications for Carbon Export in the California Current Ecosystem: A Lagrangian Analysis.Journal of Geophysical Research: Oceans,126(2).
MLA	Chabert P.,et al."Cross-Shore Flow and Implications for Carbon Export in the California Current Ecosystem: A Lagrangian Analysis".Journal of Geophysical Research: Oceans 126.2(2021).