An evaluation of subsidence rates and sea-level variability in the northern Gulf of Mexico
An evaluation of subsidence rates and sea-level variability in the northern Gulf of Mexico
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DOI：
10.1029/2011gl049458
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发表时间：
2011-11-11
影响因子：
5.2
通讯作者：
Hameed, Sultan
中科院分区：
文献类型：
--
作者：
Kolker, Alexander S.;Allison, Mead A.;Hameed, Sultan
虽然沉降被广泛认为是墨西哥湾北部地貌变化的驱动因素，但人们对沉降速率及其变化的解释存在相当大的分歧，这导致了关于沉降对地表陆地面积变化的影响的争论。在此，我们提出了一种基于海平面年际变化气象驱动因素的验潮仪记录计算沉降率的新方法。在洛杉矶的格兰德岛和德克萨斯州的加尔维斯顿，我们明确地表明，沉降的时间模式与地下流体的提取和海岸土地的流失密切相关，并表明提取速率的变化既可以增加也可以减少沉降和湿地损失的速率。我们的结果还表明，重建GOM湿地所需的沉淀量目前可能处于某些恢复情景的低端。引用：Kolker，A.S.，M.A.Allison和S.Hameed(2011)，一项对墨西哥湾北部下沉速度和海平面变化的评估，地球物理。莱特，38，L21404，DOI：10.1029/2011GL049458。
While subsidence is widely recognized as a driver of geomorphic change in the northern Gulf of Mexico (GOM), there is considerable disagreement over the rates of subsidence and the interpreted variability in these rates, which leads to controversies over the impacts of subsidence on surface land area change. Here we present a new method to calculate subsidence rates from the tide gauge record that is based on an understanding of the meteorological drivers of inter-annual sea-level change. In Grand Isle, LA and Galveston, TX, we explicitly show that temporal patterns of subsidence are closely linked to subsurface fluid withdrawal and coastal land loss, and suggest changes in withdrawal rates can both increase and decrease rates of subsidence and wetland loss. Our results also imply that the volume of sediment needed to rebuild GOM wetlands may currently fall within the low end of some restoration scenarios. Citation: Kolker, A. S., M. A. Allison, and S. Hameed (2011), An evaluation of subsidence rates and sea-level variability in the northern Gulf of Mexico, Geophys. Res. Lett., 38, L21404, doi:10.1029/2011GL049458.