SHERP

Revised estimation of continental water and ice mass loss pertinent to sea level change
해수면 상승의 대륙별 기여도 재추정

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Authors
김재승
Advisor
서기원
Major
사범대학 과학교육과
Issue Date
2018
Publisher
서울대학교 대학원
Keywords
GRACEDegree-1C21S21Sea levelMass budget
Description
학위논문 (석사)-- 서울대학교 대학원 : 사범대학 과학교육과, 2018. 2. 서기원.
Abstract
Low degree spherical harmonics coefficients of Gravity Recovery and Climate Experiment (GRACE) gravity solutions contain large uncertainty due to its measurement limitation. In addition, residual PGR effect after its correction via numerical models remains in the GRACE gravity data and thus cause additional uncertainty in the estimate of regional and larger scale surface mass change. These inaccurate low degree coefficients in GRACE gravity data must be carefully considered when estimating water mass variations in regional scale. In this study, degree-1 and C21 and S21 coefficients in the association with surface mass distribution were estimated by the forward modeling incorporating self-attraction and loading effect to realize ocean mass changes. The PGR model error was mostly suppressed in the new estimates of degree-1 and C21 and S21 SH coefficients. Using the low degree SH coefficients, we re-evaluated ocean and continental mass variations. In particularly, we showed that terrestrial water mass depletion in Asia and North America is a significant contributor to the contemporary sea level rise.
Language
English
URI
http://hdl.handle.net/10371/141950
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College of Education (사범대학)Dept. of Science Education (과학교육과)Earth Science (지구과학전공)Theses (Master's Degree_지구과학전공)
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