DOI: 10.1002/grl.50638
论文题名: Nutrient variability in Subantarctic Mode Waters forced by the Southern Annular Mode and ENSO
作者: Ayers J.M. ; Strutton P.G.
刊名: Geophysical Research Letters
ISSN: 0094-8808
EISSN: 1944-8539
出版年: 2013
卷: 40, 期: 13 起始页码: 3419
结束页码: 3423
语种: 英语
英文关键词: carbon cycling
; El Niño-Southern Oscillation (ENSO)
; meridional overturning circulation (MOC
; nutrients
; Southern Annular Mode (SAM
; Subantarctic Mode Water (SAMW)
Scopus关键词: Carbon cycling
; Interannual variability
; Meridional overturning circulations
; Primary production
; Southern Annular Mode
; Subantarctic mode water
; Wind-driven circulation
; World Ocean Circulation Experiment
; Atmospheric pressure
; Carbon
; Climatology
; Eutrophication
; Water levels
; Nutrients
; annual variation
; carbon cycle
; climate change
; Ekman transport
; El Nino-Southern Oscillation
; meridional circulation
; mode water
; nutrient availability
; overturn
; primary production
; Subantarctic Intermediate Water
; thermocline
; upwelling
; wind stress
; wind-driven circulation
; East Australian Current
; Pacific Ocean
; Pacific Sector
; Southern Ocean
英文摘要: As the primary source of nutrients to the global thermocline, Subantarctic Mode Waters (SAMWs) play a key role in primary production and climate. Here we use repeat hydrographic World Ocean Circulation Experiment/Climate Variability and Predictability data to quantify interannual SAMW nutrient variability and its forcing. Pacific sector SAMW nutrients were significantly correlated with the Southern Annular Mode (SAM) and wind stress curl anomalies associated with a faster meridional overturning circulation (MOC). A stronger MOC results in greater upwelling of nutrients at high latitudes, increased Ekman transport of nutrients equatorward, and subduction of higher preformed nutrient loads in SAMWs. Australian sector SAMWs were significantly correlated with El Niño-Southern Oscillation (ENSO), likely due to its modulation of transport in the East Australian Current extension. Interannual variability in SAMW nutrients impacts downstream tropical export production by as much as 5-12% of the annual mean. Key Points Subantarctic Mode Water nutrients vary interannually by 15-50% of the mean Wind-driven circulation forces 40-65% of Pacific sector nutrient variability Nutrient variability impacts downstream production and carbon drawdown ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84880807401&doi=10.1002%2fgrl.50638&partnerID=40&md5=486965e076118a238c80e6b556deae9b
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6072
Appears in Collections: 气候减缓与适应
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作者单位: Institute for Marine and Antarctic Studies, University of Tasmania, Private Bag 129, Hobart, TAS 7001, Australia
Recommended Citation:
Ayers J.M.,Strutton P.G.. Nutrient variability in Subantarctic Mode Waters forced by the Southern Annular Mode and ENSO[J]. Geophysical Research Letters,2013-01-01,40(13).