期刊
GEOPHYSICAL RESEARCH LETTERS
卷 40, 期 13, 页码 3419-3423出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/grl.50638
关键词
Subantarctic Mode Water (SAMW); meridional overturning circulation (MOC; Southern Annular Mode (SAM; El Nino-Southern Oscillation (ENSO); nutrients; carbon cycling
资金
- Australian Research Council Centre of Excellence for Climate System Science
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 Nino-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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据