DOI: 10.1175/JCLI-D-11-00307.1
Scopus记录号: 2-s2.0-84857484141
论文题名: Sensitivity of circumpolar deep water transport and ice shelf basal melt along the west antarctic peninsula to changes in the winds
作者: Dinniman M.S. ; Klinck J.M. ; Hofmann E.E.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2012
卷: 25, 期: 14 起始页码: 4799
结束页码: 4816
语种: 英语
Scopus关键词: Antarctica
; Ice shelves
; Ocean circulation
; Ocean model
; Regional model
; Charge density waves
; Mixing
; Ocean currents
; Sea ice
; Wind
; basal melting
; continental shelf
; deep water
; ice shelf
; sea ice
; sensitivity analysis
; shelf break
; Antarctic Circumpolar Current
; Antarctica
; Southern Ocean
英文摘要: Circumpolar Deep Water (CDW) can be found near the continental shelf break around most of Antarctica. Advection of this relatively warm water (up to 28C) across the continental shelf to the base of floating ice shelves is thought to be a critical source of heat for basal melting in some locations. A high-resolution (4 km) regional ocean-sea ice-ice shelf model of the west Antarctic Peninsula (WAP) coastal ocean was used to examine the effects of changes in the winds on across-shelf CDW transport and ice shelf basal melt. Increases and decreases in the strength of the wind fields were simulated by scaling the present-day winds by a constant factor. Additional simulations considered effects of increased Antarctic Circumpolar Current (ACC) transport. Increased wind strength and ACC transport increased the amount of CDW transported onto the WAP continental shelf but did not necessarily increase CDW flux underneath the nearby ice shelves. The basal melt underneath some of the deeper ice shelves actually decreased with increased wind strength. Increased mixing over theWAP shelf due to stronger winds removed more heat from the deeper shelf waters than the additional heat gained from increased CDWvolume transport. The simulation results suggest that the effect on the WAP ice shelves of the projected strengthening of the polar westerlies is not a simple matter of increased winds causing increased (or decreased) basal melt. A simple budget calculation indicated that iron associated with increased vertical mixing of CDW could significantly affect biological productivity of this region. © 2012 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52321
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Center for Coastal Physical Oceanography, Old Dominion University, Norfolk, VA, United States
Recommended Citation:
Dinniman M.S.,Klinck J.M.,Hofmann E.E.. Sensitivity of circumpolar deep water transport and ice shelf basal melt along the west antarctic peninsula to changes in the winds[J]. Journal of Climate,2012-01-01,25(14)