Aragonite saturation state dynamics in a coastal upwelling zone
Aragonite saturation state dynamics in a coastal upwelling zone
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DOI：
10.1002/grl.50460
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发表时间：
2013-06-16
影响因子：
5.2
通讯作者：
Hales, Burke
中科院分区：
文献类型：
--
作者：
Harris, Katherine E.;DeGrandpre, Michael D.;Hales, Burke
沿海上升流区可能面临海洋酸化的更大风险，因为上升流将低文石饱和态（（Ar））沃茨带到表面，人为CO2进一步抑制了这种海水。(Ar)根据2007年至2011年不同季节期间停泊在俄勒冈州陆架和陆架坡折处的自主pH和pCO（2）仪器的pH、pCO（2）和盐度衍生碱度时间序列数据计算。表面（Ar）值介于0.66 +/- 0.04和3.9 +/- 0.04之间，而工业化前的估计范围为1.0 +/- 0.1至4.7 +/- 0.1。上升流的高CO2水和随后的去除CO2浮游植物赋予（Ar）的动态范围从类似于1.0到类似于4.0之间的春季和秋季。淡水输入也抑制饱和状态在春季。冬季（Ar）比其他季节变化小，主要受水柱混合控制。
Coastal upwelling zones may be at enhanced risk from ocean acidification as upwelling brings low aragonite saturation state ((Ar)) waters to the surface that are further suppressed by anthropogenic CO2. (Ar) was calculated with pH, pCO(2), and salinity-derived alkalinity time series data from autonomous pH and pCO(2) instruments moored on the Oregon shelf and shelf break during different seasons from 2007 to 2011. Surface (Ar) values ranged between 0.66 +/- 0.04 and 3.9 +/- 0.04 compared to an estimated pre-industrial range of 1.0 +/- 0.1 to 4.7 +/- 0.1. Upwelling of high-CO2 water and subsequent removal of CO2 by phytoplankton imparts a dynamic range to (Ar) from similar to 1.0 to similar to 4.0 between spring and autumn. Freshwater input also suppresses saturation states during the spring. Winter (Ar) is less variable than during other seasons and is controlled primarily by mixing of the water column.