CO2 Input Dynamics and Air–Sea Exchange in a Large New England Estuary
CO2 Input Dynamics and Air–Sea Exchange in a Large New England Estuary
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新英格兰大河口的二氧化碳输入动态和海气交换
DOI：
10.1007/s12237-013-9749-2
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发表时间：
2014
影响因子：
2.7
通讯作者：
D. Vandemark
中科院分区：
文献类型：
--
作者：
C. W. Hunt;J. Salisbury;D. Vandemark
重复调查的肯纳贝克河口，在缅因州，美国的大潮汐河口，在2004年和2008年之间发现的空间和时间的变化都在河口的二氧化碳（CO2）的来源和河口CO2的海气通量。每年，肯纳贝克河口调查区的面积加权平均CO2分压（pCO2）为559微大气压。大气中的面积加权平均CO2通量为3.54 mol C m−2 year−1。总体而言，肯纳贝克河口每年向大气排放7.2 × 107 mol CO2。河口pCO2的季节性明显，在季节性模式的变化明显之间的盐度较低和较高。从河口的CO2通量升高后，两个夏季风暴，河流CO2的输入超过内部河口CO2输入几乎所有的月份。河流和河口输入的二氧化碳分别占河口二氧化碳总量的68%和32%。本研究探讨了在一个大的新英格兰河口的CO2的变化，并强调了相对较高的贡献，从河流来源的CO2。
Repeated surveys of the Kennebec estuary, a macrotidal river estuary in Maine, USA, between 2004 and 2008 found spatial and temporal variability both in sources of carbon dioxide (CO2) to the estuary and the air–sea flux of estuary CO2. On an annual basis, the surveyed area of the Kennebec estuary had an area-weighted average partial pressure of CO2 (pCO2) of 559 μatm. The area-weighted average CO2 flux to the atmosphere was 3.54 mol C m−2 year−1. Overall, the Kennebec estuary was an annual source of 7.2 × 107 mol CO2 to the atmosphere. Distinct seasonality in estuarine pCO2 was observed, with shifts in the seasonal pattern evident between lower and higher salinities. Fluxes of CO2 from the estuary were elevated following two summertime storms, and inputs of riverine CO2 outweighed internal estuarine CO2 inputs in nearly all months. River and estuarine inputs of CO2 represented 68 and 32 % of the total CO2 contributions to the estuary, respectively. This study examines the variability of CO2 in a large New England estuary, and highlights the comparatively high contribution of CO2 from riverine sources.