DOI: 10.1029/2018GB006125
论文题名: Effects of Eddy-Driven Subduction on Ocean Biological Carbon Pump
作者: Resplandy L. ; Lévy M. ; McGillicuddy D.J. ; Jr.
刊名: Global Biogeochemical Cycles
ISSN: 0886-6236
EISSN: 1944-9224
出版年: 2019
卷: 33, 期: 8 语种: 英语
英文关键词: climate change
; dissolved organic carbon
; heterogeneity
; mesoscale eddy
; mixed layer
; quantitative analysis
; spatiotemporal analysis
; subtropical region
学科: carbon export hot spots
; carbon subduction
; eddy pump
; mesoscale eddies
; mixed-layer pump
; ocean biological pump
中文摘要: 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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/160111
Appears in Collections: 气候变化与战略
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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
Recommended Citation:
Resplandy L.,Lévy M.,McGillicuddy D.J.,et al. Effects of Eddy-Driven Subduction on Ocean Biological Carbon Pump[J]. Global Biogeochemical Cycles,2019-01-01,33(8)