气候变化领域集成服务门户(CCPortal): Effects of Eddy-Driven Subduction on Ocean Biological Carbon Pump

CCPortal

DOI	10.1029/2018GB006125
	Effects of Eddy-Driven Subduction on Ocean Biological Carbon Pump
	Resplandy L.; Lévy M.; McGillicuddy D.J.; Jr.
发表日期	2019
ISSN	0886-6236
EISSN	1944-9224
起始页码	1071
结束页码	1084
卷号	33 期号:8
英文摘要	Estimates of the ocean biological carbon pump are limited by uncertainties in the magnitude of the physical injection of particulate and dissolved organic carbon to the ocean interior. A major challenge is to evaluate the contribution of these physical pumps at small spatial and temporal scales (<100 km and <1 month). Here, we use a submesoscale permitting biophysical model covering a large domain representative of a subpolar and a subtropical gyre to quantify the impact of small-scale physical carbon pumps.The model successfully simulates intense eddy-driven subduction hot spots with a magnitude comparable to what has been observed in nature (1,000–6,000 mg C·m−2·day−1). These eddy-driven subduction events are able to transfer carbon below the mixed-layer, down to 500- to 1,000-m depth. However, they contribute <5% to the annual flux at the scale of the basin, due to strong compensation between upward and downward fluxes. The model also simulates hot spots of export associated with small-scale heterogeneity of the mixed layer, which intermittently export large amounts of suspended particulate and dissolved organic carbon. The mixed-layer pump contributes ∼20% to the annual flux. High-resolution measurements of export flux are needed to test models such as this one and to improve our mechanistic understanding of the biological pump and how it will respond to climate change. ©2019. American Geophysical Union. All Rights Reserved.
英文关键词	carbon export hot spots; carbon subduction; eddy pump; mesoscale eddies; mixed-layer pump; ocean biological pump
语种	英语
scopus关键词	climate change; dissolved organic carbon; heterogeneity; mesoscale eddy; mixed layer; quantitative analysis; spatiotemporal analysis; subtropical region
来源期刊	Global Biogeochemical Cycles
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/129716
作者单位	Geosciences Department, Princeton Environmental Institute, Princeton University, Princeton, NJ, United States; Sorbonne Université, CNRS, IRD, MNHN, LOCEAN-IPSL, Paris, France; Department of Applied Ocean Physics and Engineering, Woods Hole Oceanographic Institution, Woods Hole, MA, United States
推荐引用方式 GB/T 7714	Resplandy L.,Lévy M.,McGillicuddy D.J.,et al. Effects of Eddy-Driven Subduction on Ocean Biological Carbon Pump[J],2019,33(8).
APA	Resplandy L.,Lévy M.,McGillicuddy D.J.,&Jr..(2019).Effects of Eddy-Driven Subduction on Ocean Biological Carbon Pump.Global Biogeochemical Cycles,33(8).
MLA	Resplandy L.,et al."Effects of Eddy-Driven Subduction on Ocean Biological Carbon Pump".Global Biogeochemical Cycles 33.8(2019).