| 报告题目： |
Earth Mass Transport Studies Using GRACE Gravimetry |
| 报告人： |
C.K Shum |
| 报告人单位： |
The Ohio State University |
| 报告时间： |
2017年6月9日9:30 |
| 报告地点： |
引力中心三楼会议室 |
| 报告人简介： |
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C.K. SHUM is a Professor and Distinguished University Scholar, Division of Geodetic Science, School of Earth Sciences, at The Ohio State University. He is a Fellow of the American Association for the Advancement of Science, and a Fellow of the International Association of Geodesy. He received numerous awards including the 2012 Vening Meinesz Medal from the European Geosciences Union. He was a Lead Author in 2007 Intergovernmental Panel for Climate Change (IPCC) Working Group 1 (The Physical Science Basis), Fourth Assessment Report (AR4), which contributed to the 2007 Nobel Peace Prize awarded to IPCC and Al Gore, Jr. He and his group focus on scientific research relates to the quantification of 20 th Century and present-day global sea-level rise due to various geophysical sources, including anthropogenic climate-change. |
| 报告摘要： |
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The unique Gravity Recovery and Climate Experiment (GRACE) twin-satellite mission equipped with a micron precision K/Ka-Band ranging (KBR) system and other payloads, has been generating climate data record in the form of Earth’s mass variations or transports for more than a decade since March 2002. These innovative measurements have generated transformative scientific findings and potential applications for climate change and interdisciplinary Earth science studies. Improved formulations for the Energy Balance Approach has demonstrated that more than couple orders of magnitude improvement in precision could be achieved for the estimation of in situ geopotential differences directly using GRACE twin-satellite K/Ka-Band inter-satellite range-rate tracking data, and that the technique is efficient and flexible for global and regional gravity inversions focusing on particular geophysical signals of interest. Our ultimate goal is to preserve both the low- and high-frequency gravity signals, and to enhance spatio-temporal resolutions for these geophysical signals. This lecture presents selected example applications associated with the plausible objectives towards quantifying terrestrial surface and ground water storages at a local and bi-weekly or shorter temporal scale, undersea mega earthquake coseismic deformation, or natural disaster events such as flood, drought, snow storms. |
