DOI: 10.1002/2015GL064508
论文题名: Observed platelet ice distributions in Antarctic sea ice: An index for ocean-ice shelf heat flux
作者: Langhorne P.J. ; Hughes K.G. ; Gough A.J. ; Smith I.J. ; Williams M.J.M. ; Robinson N.J. ; Stevens C.L. ; Rack W. ; Price D. ; Leonard G.H. ; Mahoney A.R. ; Haas C. ; Haskell T.G.
刊名: Geophysical Research Letters
ISSN: 0094-9232
EISSN: 1944-8963
出版年: 2015
卷: 42, 期: 13 起始页码: 5442
结束页码: 5451
语种: 英语
Scopus关键词: Digital storage
; Heat flux
; Platelets
; Sea ice
; Supercooling
; Uncertainty analysis
; Antarctic sea ice
; Crystallographic structure
; Historical data
; Ice shelf waters
; Mcmurdo ice shelves
; Ocean surfaces
; Oceanic heat flux
; Sea-ice thickness
; Ice
; crystallography
; heat flux
; ice shelf
; ice-ocean interaction
; polynya
; sea ice
; supercooling
; Antarctica
; East Antarctica
; McMurdo Ice Shelf
; Ross Sea
; Southern Ocean
英文摘要: Antarctic sea ice that has been affected by supercooled Ice Shelf Water (ISW) has a unique crystallographic structure and is called platelet ice. In this paper we synthesize platelet ice observations to construct a continent-wide map of the winter presence of ISW at the ocean surface. The observations demonstrate that, in some regions of coastal Antarctica, supercooled ISW drives a negative oceanic heat flux of -30Wm-2 that persists for several months during winter, significantly affecting sea ice thickness. In other regions, particularly where the thinning of ice shelves is believed to be greatest, platelet ice is not observed. Our new data set includes the longest ice-ocean record for Antarctica, which dates back to 1902 near the McMurdo Ice Shelf. These historical data indicate that, over the past 100years, any change in the volume of very cold surface outflow from this ice shelf is less than the uncertainties in the measurements. Key Points In SW Ross Sea no change in Ice Shelf Water volume under sea ice is detectable over past 100 years Using platelet ice records, an Antarctic-wide map of supercooled Ice Shelf Water is constructed Ice Shelf Water heat flux persists for months with a magnitude similar to that in polynya formation. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84938099126&doi=10.1002%2f2015GL064508&partnerID=40&md5=dcf101caba4f438aae7eae9fdf7b8b31
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8848
Appears in Collections: 科学计划与规划 气候变化与战略
There are no files associated with this item.
作者单位: Department of Physics, University of Otago, Dunedin, New Zealand
Recommended Citation:
Langhorne P.J.,Hughes K.G.,Gough A.J.,et al. Observed platelet ice distributions in Antarctic sea ice: An index for ocean-ice shelf heat flux[J]. Geophysical Research Letters,2015-01-01,42(13).