| DOI: | 10.1002/2015GL064322
|
| 论文题名: | Antarctic bedrock topography uncertainty and ice sheet stability |
| 作者: | Gasson E.; DeConto R.; Pollard D.
|
| 刊名: | Geophysical Research Letters
|
| ISSN: | 0094-9098
|
| EISSN: | 1944-8829
|
| 出版年: | 2015
|
| 卷: | 42, 期:13 | | 起始页码: | 5372
|
| 结束页码: | 5377
|
| 语种: | 英语
|
| 英文关键词: | Antarctic ice sheets
; Bedmap2
; bedrock topography
|
| Scopus关键词: | Data acquisition
; Glaciers
; Sea level
; Uncertainty analysis
; Antarctic ice sheets
; Bedmap2
; Elevation data
; Future improvements
; Ice sheet models
; Sea level rise
; Topographic noise
; Warm climates
; Ice
; amplitude
; bedrock
; climate forcing
; climate variation
; data acquisition
; data set
; ensemble forecasting
; glacier retreat
; ice sheet
; noise
; Pliocene
; sea level
; uncertainty analysis
; Antarctic Ice Sheet
; Antarctica
|
| 英文摘要: | Antarctic bedrock elevation estimates have uncertainties exceeding 1km in certain regions. Bedrock elevation, particularly where the bedrock is below sea level and bordering the ocean, can have a large impact on ice sheet stability. We investigate how present-day bedrock elevation uncertainty affects ice sheet model simulations for a generic past warm period based on the mid-Pliocene, although these uncertainties are also relevant to present-day and future ice sheet stability. We perform an ensemble of simulations with random topographic noise added with various length scales and with amplitudes tuned to the uncertainty of the Bedmap2 data set. Total Antarctic ice sheet retreat in these simulations varies between 12.6 and 17.9m equivalent sea level rise after 3kyrs of warm climate forcing. This study highlights the sensitivity of ice sheet models to existing uncertainties in bedrock elevation and the ongoing need for new data acquisition. Key Points Quantify how Antarctic bed elevation uncertainty affects ice sheet simulations Simulate retreat of the Antarctic ice sheet for a warm Pliocene climate Identify key areas for future improvements to bed elevation data. © 2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84938151212&doi=10.1002%2f2015GL064322&partnerID=40&md5=906fb231095b65cce9373229fa2edb96
|
| Citation statistics: |
|
| 资源类型: | 期刊论文
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/8714
|
| 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: | Climate System Research Center, University of Massachusetts Amherst, Amherst, MA, United States
|
| Recommended Citation: | |
Gasson E.,DeConto R.,Pollard D.. Antarctic bedrock topography uncertainty and ice sheet stability[J]. Geophysical Research Letters,2015-01-01,42(13).
|
|
|