Air-water fluxes and sources of carbon dioxide in the Delaware Estuary: spatial and seasonal variability
Air-water fluxes and sources of carbon dioxide in the Delaware Estuary: spatial and seasonal variability
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DOI：
10.5194/bg-12-6085-2015
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发表时间：
2015-01-01
期刊：
影响因子：
4.9
通讯作者：
Cai, W. -J.
中科院分区：
文献类型：
--
作者：
Joesoef, A.;Huang, W. -J.;Cai, W. -J.
在特拉华河口（美国）的九次航行中测量了地表水二氧化碳分压 (pCO(2)) 的分布。相对于大气而言，特拉华河在所有季节的 pCO(2) 含量都处于高度过饱和状态，而特拉华湾在春季和夏末的 pCO(2) 含量处于欠饱和状态，而在仲夏、秋季和冬季则处于中度过饱和状态。虽然较小的上游潮汐河是强 CO2 源 (27.1 +/- 6.4 mol-Cm-2 yr(-1))，但较大的海湾是弱源 (1.2 +/- 1.4 mol-Cm-2 yr(-1))，后者的面积比前者大得多。反过来，特拉华河口是一个相对较弱的二氧化碳源（2.4 +/- 4.8 mol-Cm-2 yr(-1)），这与许多其他河口系统形成鲜明对比。季节性地，pCO(2) 变化在低盐度时最大（0
Distributions of surface water partial pressure of carbon dioxide (pCO(2)) were measured on nine cruises in the Delaware Estuary (USA). The Delaware River was highly supersaturated in pCO(2) with respect to the atmosphere during all seasons, while the Delaware Bay was undersaturated in pCO(2) during spring and late summer and moderately supersaturated during mid-summer, fall, and winter. While the smaller upper tidal river was a strong CO2 source (27.1 +/- 6.4 mol-Cm-2 yr(-1)), the much larger bay was a weak source (1.2 +/- 1.4 mol-Cm-2 yr(-1)), the latter of which had a much greater area than the former. In turn, the Delaware Estuary acted as a relatively weak CO2 source (2.4 +/- 4.8 mol-Cm-2 yr(-1)), which is in great contrast to many other estuarine systems. Seasonally, pCO(2) changes were greatest at low salinities (0