DOI: 10.1038/ngeo2299
论文题名: Thick and deformed Antarctic sea ice mapped with autonomous underwater vehicles
作者: Williams G. ; Maksym T. ; Wilkinson J. ; Kunz C. ; Murphy C. ; Kimball P. ; Singh H.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2015
卷: 8, 期: 1 起始页码: 61
结束页码: 67
语种: 英语
Scopus关键词: autonomous underwater vehicle
; remote sensing
; satellite data
; volume
; Antarctica
; Bellingshausen Sea
; East Antarctica
; Southern Ocean
; Weddell Sea
; Wilkes Land
英文摘要: Satellites have documented trends in Antarctic sea-ice extent and its variability for decades, but estimating sea-ice thickness in the Antarctic from remote sensing data remains challenging. In situ observations needed for validation of remote sensing data and sea-ice models are limited; most have been restricted to a few point measurements on selected ice floes, or to visual shipboard estimates. Here we present three-dimensional (3D) floe-scale maps of sea-ice draft for ten floes, compiled from two springtime expeditions by an autonomous underwater vehicle to the near-coastal regions of the Weddell, Bellingshausen, and Wilkes Land sectors of Antarctica. Mean drafts range from 1.4 to 5.5 m, with maxima up to 16 m. We also find that, on average, 76% of the ice volume is deformed ice. Our surveys indicate that the floes are much thicker and more deformed than reported by most drilling and ship-based measurements of Antarctic sea ice. We suggest that thick ice in the near-coastal and interior pack may be under-represented in existing in situ assessments of Antarctic sea ice and hence, on average, Antarctic sea ice may be thicker than previously thought. © 2014 Macmillan Publishers Limited. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106197
Appears in Collections: 气候减缓与适应 科学计划与规划
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作者单位: Institute of Antarctic and Marine Science, University of Tasmania, Hobart, TAS, Australia; Antarctic Climate and Ecosystems Cooperative Research Centre, Hobart, TAS, Australia; Woods Hole Oceanographic Research Institution, Woods Hole, MA, United States; British Antarctic Survey, Cambridge, United Kingdom; Google Inc., Mountain View, CA, United States; Bluefin Robotics, Quincy, MA, United States
Recommended Citation:
Williams G.,Maksym T.,Wilkinson J.,et al. Thick and deformed Antarctic sea ice mapped with autonomous underwater vehicles[J]. Nature Geoscience,2015-01-01,8(1)