Spatial and temporal variations in atmospheric gas flux from the Hudson River: the estuarine gas exchange maximum
Spatial and temporal variations in atmospheric gas flux from the Hudson River: the estuarine gas exchange maximum
复制标题
哈德逊河大气气体通量的时空变化：河口气体交换最大值
DOI：
10.1002/lno.12154
复制
发表时间：
2022
影响因子：
4.5
通讯作者：
Traylor, Shawnee
中科院分区：
文献类型：
--
作者：
Scully, Malcolm E.;Michel, Anna P. M.;Nicholson, David P.;Traylor, Shawnee
从固定仪器、空间调查和哈德逊河长期观测网络收集的数据的独特组合证明了大气气体通量时空变化的重要性。氧气（O2）和二氧化碳（CO2）的大气交换在一系列时间尺度上表现出可变性，包括由春季小潮分层和混合变化驱动的明显调制。在弱小潮期间，底层沃茨变得富含pCO 2，溶解氧减少，因为强烈的分层限制了垂直混合，并将次密度跃层水与大气交换隔离开来。小潮期间河口环流也得到加强，因此底层沃茨及其相关的溶解气体被向上输送到河口。大潮期间的强混合有效地通风底部沃茨，从而增强CO2逃逸和O2入侵。在哈德逊河河口部分的春季-小潮调制增强，因为每两周的混合变化对浮游植物动态有很大的影响，允许在弱小潮期间发生强烈的水华。在水华期间，CO2入侵和O2逃逸的时期发生在许多较低的分层河口。分层的沿着-河口分布，在河口上游减少，有利于盐限附近的气体交换增强，在盐限附近没有垂直分层。这一区域，我们称之为河口气体交换最大值（EGM），是由底部输运的汇聚引起的，类似于河口最大浑浊带（ETM）。与ETM非常相似，EGM可能是许多部分混合和分层河口系统的共同特征。
A unique combination of data collected from fixed instruments, spatial surveys, and a long‐term observing network in the Hudson River demonstrate the importance of spatial and temporal variations in atmospheric gas flux. The atmospheric exchanges of oxygen (O2) and carbon dioxide (CO2) exhibit variability at a range of time scales including pronounced modulation driven by spring‐neap variations in stratification and mixing. During weak neap tides, bottom waters become enriched in pCO2and depleted in dissolved oxygen because strong stratification limits vertical mixing and isolates sub‐pycnocline water from atmospheric exchange. Estuarine circulation also is enhanced during neap tides so that bottom waters, and their associated dissolved gases, are transported up‐estuary. Strong mixing during spring tides effectively ventilates bottom waters resulting in enhanced CO2evasion and O2invasion. The spring‐neap modulation in the estuarine portion of the Hudson River is enhanced because fortnightly variations in mixing have a strong influence on phytoplankton dynamics, allowing strong blooms to occur during weak neap tides. During blooms, periods of CO2invasion and O2evasion occur over much of the lower stratified estuary. The along‐estuary distribution of stratification, which decreases up‐estuary, favors enhanced gas exchange near the limit of salt, where vertical stratification is absent. This region, which we call the estuarine gas exchange maximum (EGM), results from the convergence in bottom transport and is analogous to the estuarine turbidity maximum (ETM). Much like the ETM, the EGM is likely to be a common feature in many partially mixed and stratified estuarine systems.
使用双示踪技术测定潮汐哈德逊河的气体交换率
DOI：
--
发表时间：
1994
期刊：
影响因子：
--
作者：
Jordan F. Clark;R. Wanninkhof;P. Schlosser;H. J. Simpson
通讯作者：
H. J. Simpson
新英格兰大河口的二氧化碳输入动态和海气交换
影响因子：
2.7
作者：
C. W. Hunt;J. Salisbury;D. Vandemark
通讯作者：
D. Vandemark
影响因子：
11.4
作者：
Nicholson, David P.;Michel, Anna P. M.;Monk, Samuel A.
通讯作者：
Monk, Samuel A.