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Collaborative Research: A Study of Sea Level Change in the Northeastern U.S. Using GPS and Tide Gauge Data With Applications to Global Sea Level Change

合作研究：利用 GPS 和验潮数据研究美国东北部海平面变化及其在全球海平面变化中的应用

基本信息

批准号：
9706407
负责人：
Robert Nerem
金额：
$ 30.3万
依托单位：
University of Texas at Austin
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
1997
资助国家：
美国
起止时间：
1997-09-15 至 2001-02-28
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9706407&HistoricalAwards=false
关键词：
Collaborative Research Study Sea Level

项目摘要

9706407 Nerem The objective of this investigation is to make Global Positioning System (GPS) measurements of 3-dimensional crustal deformation in the northeastern U.S., combined with absolute gravity and tide gauge measurements, to infer the viscosity of the lower mantle and thus improve current models of glacial isostatic adjustment. This will allow the PIs to determine the relative roles of crustal motion and sea level rise in this region, and also develop an improved estimate of global mean sea level rise from the global tide gauge data set. They will install 6 new permanent GPS sites along the northeastern coast of the U.S., which will supplement the current sites in the Continuously Operating Reference System (CORS), which will also be evaluated for use in this investigation. A related objective of the investigation is to develop improved methods of GPS vertical positioning, including modeling vertical motions associated with pressure loading, tidal loading, etc. The PIs anticipate this investigation will result in an improved understanding of sea level change in the northeastern U.S., an improved model of glacial isostatic adjustment, and an improved estimate of global sea level change through the application of this model to the global tide gauge data. ***

小行星9706407 这项调查的目的是使全球定位系统（GPS）测量的三维地壳变形在美国东北部，结合绝对重力和验潮仪测量，推断下地幔的粘度，从而改进目前的冰川均衡调整模型。这将使研究所能够确定该区域地壳运动和海平面上升的相对作用，并根据全球验潮仪数据集对全球平均海平面上升进行更好的估计。他们将在美国东北海岸沿着安装6个新的永久性GPS站点，这将补充目前的网站在连续运行参考系统（CORS），这也将被评估用于本调查。调查的一个相关目标是开发改进的GPS垂直定位方法，包括模拟与压力负荷、潮汐负荷等相关的垂直运动。PI预计这项调查将有助于更好地了解美国东北部的海平面变化，一个改进的冰川均衡调整模型，以及通过将该模型应用于全球验潮站数据来改进对全球海平面变化的估计。 ***