DOI: 10.1002/2014GL060636
论文题名: GOCE's view below the ice of Antarctica: Satellite gravimetry confirms improvements in Bedmap2 bedrock knowledge
作者: Hirt C.
刊名: Geophysical Research Letters
ISSN: 0094-9954
EISSN: 1944-9685
出版年: 2014
卷: 41, 期: 14 起始页码: 5021
结束页码: 5028
语种: 英语
英文关键词: bedrock
; GOCE
; gravity forward modeling
; satellite gravity
; topography
Scopus关键词: Climate change
; Gravitation
; Satellites
; Topography
; bedrock
; European Space Agency
; Forward modeling
; GOCE
; Mass distribution
; Ocean circulation
; Satellite gravimetries
; Satellite gravity
; Planetary surface analysis
; bedrock
; climate change
; GOCE
; gravimetry
; gravity field
; ice sheet
; ice thickness
; satellite imagery
; topographic mapping
; Antarctica
英文摘要: Accurate knowledge of Antarctica's topography, bedrock, and ice sheet thickness is pivotal for climate change and geoscience research. Building on recent significant progress made in satellite gravity mapping with European Space Agency's Gravity field and Ocean Circulation Explorer (GOCE) mission, we here reverse the widely used approach of validating satellite gravity with topography and instead utilize the new GOCE gravity maps for novel evaluation of Bedmap1/2. Space-collected GOCE gravity reveals clear improvements in the Bedmap2 ice and bedrock data over Bedmap1 via forward modeled topographic mass and gravity effects at spatial scales of 400 to 80 km. Our study demonstrates GOCE's sensitivity for the subsurface mass distribution in the lithosphere and delivers independent evidence for Bedmap2's improved quality, reflecting new radar-derived ice thickness data. GOCE and Bedmap2 are combined to produce improved Bouguer gravity maps over Antarctica. We recommend incorporation of Bedmap2 in future high-resolution global topography and geopotential models and its use for detailed geoid modeling over Antarctica. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84904274493&doi=10.1002%2f2014GL060636&partnerID=40&md5=151f704d405923e034ba6fcf3638a797
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7218
Appears in Collections: 气候减缓与适应
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作者单位: Western Australian Centre for Geodesy, Institute for Geoscience Research, Curtin University, Perth, WA, Australia
Recommended Citation:
Hirt C.. GOCE's view below the ice of Antarctica: Satellite gravimetry confirms improvements in Bedmap2 bedrock knowledge[J]. Geophysical Research Letters,2014-01-01,41(14).