DOI: 10.1002/2016GL070565
论文题名: An advective mechanism for deep chlorophyll maxima formation in southern Drake Passage
作者: Erickson Z.K. ; Thompson A.F. ; Cassar N. ; Sprintall J. ; Mazloff M.R.
刊名: Geophysical Research Letters
ISSN: 0094-8509
EISSN: 1944-8240
出版年: 2016
卷: 43, 期: 20 起始页码: 10846
结束页码: 10855
语种: 英语
英文关键词: biophysical interactions
; deep chlorophyll maximum
; eddy transport
Scopus关键词: Oceanography
; Temperature measurement
; Biological pumps
; Deep chlorophyll maximums
; Eddy transports
; Euphotic layers
; Phytoplankton bloom
; Potential vorticity gradients
; Satellite measurements
; Tracer transport
; Chlorophyll
英文摘要: We observe surface and subsurface fluorescence-derived chlorophyll maxima in southern Drake Passage during austral summer. Backscatter measurements indicate that the deep chlorophyll maxima (DCMs) are also deep biomass maxima, and euphotic depth estimates show that they lie below the euphotic layer. Subsurface, offshore and near-surface, onshore features lie along the same isopycnal, suggesting advective generation of DCMs. Temperature measurements indicate a warming of surface waters throughout austral summer, capping the winter water (WW) layer and increasing off-shelf stratification in this isopycnal layer. The outcrop position of the WW isopycnal layer shifts onshore, into a surface phytoplankton bloom. A lateral potential vorticity (PV) gradient develops, such that a down-gradient PV flux is consistent with offshore, along-isopycnal tracer transport. Model results are consistent with this mechanism. Subduction of chlorophyll and biomass along isopycnals represents a biological term not observed by surface satellite measurements which may contribute significantly to the strength of the biological pump in this region. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84991687240&doi=10.1002%2f2016GL070565&partnerID=40&md5=5c8006824d422aa860dc6c41690006fd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9472
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Environmental Science and Engineering, California Institute of Technology, Pasadena, CA, United States
Recommended Citation:
Erickson Z.K.,Thompson A.F.,Cassar N.,et al. An advective mechanism for deep chlorophyll maxima formation in southern Drake Passage[J]. Geophysical Research Letters,2016-01-01,43(20).