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

9706407 Nerem本次调查的目的是利用全球定位系统测量美国东北部的三维地壳形变，并结合绝对重力和验潮仪测量，以推断下地幔的粘性，从而改进现有的冰川均衡调整模型。这将使PIS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改进对全球平均海平面上升的估计。他们将在美国东北海岸安装6个新的永久性GPS站点，这将补充持续运行参考系统(CORS)中的现有站点，该系统也将被评估用于本次调查。这项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，这项调查将导致对美国东北部海平面变化的更好理解，改进的冰川均衡调整模型，并通过将该模型应用于全球验潮仪数据，改进对全球海平面变化的估计。***

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. ***