High spatio-temporal resolution changes in Earth's gravity field from GOCE with application to ice mass balance

GOCE 地球重力场的高时空分辨率变化及其在冰质量平衡中的应用

• 批准号: NE/F000170/1
• 负责人: Matt King
• 金额: $ 3.25万
• 依托单位: Newcastle University
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2008
• 资助国家: 英国
• 起止时间: 2008 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=NE%2FF000170%2F1
• 关键词: spatio; temporal; resolution; changes; Earth

In late 2007, the European Space Agency's first Earth Explorer mission will be launched. The Gravity field and steady-state Ocean Circulation Explorer (GOCE) mission, is focused on the determination of a high resolution and accuracy (~1cm at 116km) global static gravity field and its subsequent exploitation to determine the steady-state dynamic ocean topography. It is scheduled to operate for two six month observation windows each separated by approximately 6 months. Mission extension may allow further observation windows. While the focus of GOCE data is on the static gravity field it will be sensitive to mass variations over each six month window. The proposed research is to implement an algorithm to allow for time-variable gravity fields to be determined ahead of the GOCE data release. Namely, over each 6 month observation window, we will determine a secular change in the gravity field. The purpose of this is to, in the future, exploit the GOCE data in this way to enable a greater understanding of rapid ice mass changes observed notably in SE Greenland and parts of Antarctica.

2007年下半年，欧洲航天局将发射第一个地球探测器使命。重力场和稳态海洋环流探测器（GOCE）使命的重点是确定高分辨率和高精度（116公里处~ 1厘米）的全球静态重力场，并随后利用该重力场确定稳态动态海洋地形。它计划运行两个为期六个月的观察窗口，每个窗口相隔约六个月。使命的延长可能会有更多的观察窗口。虽然GOCE数据的重点是静态重力场，但它对每个六个月窗口的质量变化很敏感。拟议的研究是实施一种算法，允许在GOCE数据发布之前确定时变重力场。也就是说，在每6个月的观测窗口中，我们将确定重力场的长期变化。这样做的目的是，在未来，以这种方式利用GOCE数据，以便更好地了解在格陵兰岛东南部和南极洲部分地区观察到的快速冰量变化。