高瑀^1,,
王正涛^1,,,
李夫鹏¹,
超能芳²
1. 武汉大学测绘学院, 武汉 430079
2. 中国地质大学(武汉), 地球内部多尺度成像湖北省重点实验室, 武汉 430074

基金项目: 国家自然科学基金(41774019, 41974007, 41974019, 41704011), 国家重点研发计划项目(2018YFF0212201)共同资助


详细信息

作者简介: 高瑀, 女, 1996年生, 硕士, 主要从事固体地球物理学研究.E-mail: ygaosgg@whu.edu.cn

通讯作者: 王正涛, 男, 1976年生, 博士生导师、教授, 主要从事物理大地测量学、卫星大地测量学、地磁学等方面的研究.E-mail: ztwang@whu.edu.cn

中图分类号: P312

收稿日期:2020-08-05
修回日期:2021-02-08
上线日期:2021-07-10

The spatio-temporal feature of Greenland Mass Changes as determined by GRACE, Swarm, and GRACE-FO

GAO Yu^1,,
WANG ZhengTao^1,,,
LI FuPeng¹,
CHAO NengFang²
1. School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China
2. Hubei Subsurface Multi-scale Imaging Key Laboratory, Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan 430074, China


More Information

Corresponding author: WANG ZhengTao,E-mail:ztwang@whu.edu.cn

MSC: P312

--> Received Date: 05 August 2020
Revised Date: 08 February 2021
Available Online: 10 July 2021


摘要
摘要:GRACE（Gravity Recovery and Climate Experiment）重力卫星任务的成功实施，极大推进了极地冰盖质量平衡、全球水循环和海水质量变化等领域的研究，其后续任务GRACE-FO（Gravity Recovery and Climate Experiment Follow-On）于2018年5月成功发射，但两个卫星任务存在近一年的观测空白期.Swarm卫星于2013年11月成功发射，其任务由三颗在低轨道高度绕地球运行的卫星组成，搭载有GPS接收器、加速度计等装置，使得Swarm卫星具有恢复静态和时变重力场的能力.本文利用Swarm卫星观测反演格陵兰岛冰盖质量变化，通过与GRACE、GRACE-FO结果进行对比，验证其确定地表质量变化的能力，并基于GRACE、Swarm和GRACE-FO数据建立了2002年4月—2020年5月格陵兰岛冰盖质量变化时间序列，进一步利用温度和降水数据探讨冰盖消融的原因.结果表明：1）2013年12月—2017年6月，利用GRACE数据和Swarm数据确定的格陵兰岛冰盖质量变化时间序列的相关系数为0.652；2）2018年6月—2019年6月，基于GRACE-FO数据和Swarm数据得到格陵兰岛冰盖质量变化时间序列的相关系数为0.518；3）2002年4月—2020年5月格陵兰岛冰盖质量下降速率为-11.174±0.109 cm·a^-1，非季节性冰盖质量异常在2013年4月出现极小值；4）在2010年8月—2017年6月，格陵兰岛地区温度异常和径流量异常升高，以及降水量异常减少，在一定程度上，加剧了该地区的冰盖消融.本文研究表明Swarm卫星具有探测地球时变重力场的能力，可填补GRACE和GRACE-FO任务之间的空白.
关键词: Swarm/
GRACE/
GRACE-FO/
格陵兰岛/
冰盖质量变化

Abstract:The successful implementation of the Gravity Recovery and Climate Experiment (GRACE) satellite gravity mission has greatly advanced research in the polar ice mass balance, global water cycle, and ocean mass change. However, there was a gap between the retirement of GRACE, which ended in October 2017, and the launch of the Gravity Recovery and Climate Experiment Follow-On mission, which began in May 2018. The Swarm mission consists of three satellites carrying GPS receivers, star cameras, and laser retro-reflectors, so they can be used to determine the Earth's gravity field. This study aims to investigate the feasibility of Swarm satellite data for inversion ice mass changes in Greenland, construct a time series from April 2002 to May 2020, and explore the causes of Greenland ice loss from temperature and precipitation data. Results showed 1) during the period from December 2013 and June 2017, the correlation coefficient between the time series of ice mass variation from Swarm and GRACE data was 0.652. 2) From June 2018 to June 2019, the correlation of Greenland ice sheet mass change was 0.518 in between GRACE-FO data and Swarm. 3) Ice mass loss in Greenland between April 2002 and May 2020 was 11.174±0.109 cm·a^-1 from GRACE, Swarm and GRACE-FO data, and the non-seasonal changes in ice sheet mass indicated that a minimum value in April 2013. 4) From August 2010 to June 2017, the temperature and runoff anomalies increased in the Greenland area, and precipitation anomalies declined in number, which caused the ice sheet in Greenland to melt. This study concluded that the Swarm satellite can be used to study the earth time-variable gravity field and bridge the gap between GRACE and GRACE-FO mission.
Key words:Swarm/
GRACE/
GRACE-FO/
Greenland/
Ice mass variation



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