US-Egypt Cooperative Research: Water Storage, Atmospheric Pressure, and the GRACE Gravity Satellite Mission

0315533Wahr 描述：该奖项旨在支持科罗拉多州博尔德市科罗拉多大学物理系 John Wahr 博士和埃及萨达特市 Menoufia 大学沙漠环境研究所 Mosalam Shaltout 博士之间的合作项目。 主要目标与 2002 年 3 月由 NASA 和 DLR（德国航天局）发射的为期 5 年的 GRACE 重力卫星任务相关。 这两个目标都涉及 GRACE 监测埃及地下水和地表水大规模平均值变化的能力。这些目标是：(1) 验证 GRACE 数据以确保它们持续满足精度规范； (2) 利用 GRACE 对埃及大规模水变化的测量来监测含水层的长期枯竭以及可用于农业目的的土壤和地下土层水量的变化等情况。 作为实现这些目标的努力的一部分，PI 将继续采集全国各地（包括东南沙漠周边地区）气压计记录的压力和温度数据。 范围：该项目是美国国家科学基金会国际科学与工程办公室资助项目的延续，也是将时变卫星重力观测纳入水文科学整体努力的一部分。 这些观测结果构成了水文学的一种新的创新数据类型，对于增进对全球水循环的了解具有很大的希望。 该项目将使来自水资源问题相当重要的埃及的科学家熟悉这种新数据类型的分析。 该项目得到了美国-埃及联合基金计划的支持，该计划向两国的科学家和工程师提供赠款以开展这些合作活动。

0315533WahrDescription: This award is to support a collaborative project between Dr. John Wahr, Department of Physics, University of Colorado, Boulder, Colorado and Dr. Mosalam Shaltout, Desert Environment Research Institute, Menoufia University, El-Sadat City, Egypt. The primary objectives are related to the 5-year GRACE gravity satellitemission, launched in March 2002 by NASA and DLR (the German Space Agency). Bothobjectives involve the ability of GRACE to monitor changes in large-scale averages of ground-and surface-water in Egypt. These objectives are:(1) to validate the GRACE data to make sure they are continually meeting accuracy specifications; and (2) to use the GRACE measurements of large-scale water variability in Egypt to monitor such things as long-term aquifer depletion, and changes in the amount of water in the soil and sub-soil layers available for agricultural purposes. As part of the effort to achieve these goals, the PIs will continue the acquisition of pressure and temperature data as recorded at barometers throughout the country, including in the region surrounding the southeastern desert. Scope: This project is the continuation of a project initiated under a grant from NSF, Office of International Science and Engineering, and is part of an overall effort towards integrating time-variable satellite gravity observations into the hydrological sciences. These observations constitute a new and innovative data type for hydrology, with considerable promise for improved understanding of the global water cycle. This project will allow scientists from Egypt, a country where water resource issues are of considerable importance, to familiarize them with the analysis of this new data type. This project is being supported under the US-Egypt Joint Fund Program, which provides grants to scientists and engineers in both countries to carry out these cooperative activities.