| DOI: | 10.1002/grl.51011
|
| 论文题名: | Rapid submarine melting driven by subglacial discharge, LeConte Glacier, Alaska |
| 作者: | Motyka R.J.; Dryer W.P.; Amundson J.; Truffer M.; Fahnestock M.
|
| 刊名: | Geophysical Research Letters
|
| ISSN: | 0094-8485
|
| EISSN: | 1944-8216
|
| 出版年: | 2013
|
| 卷: | 40, 期:19 | | 起始页码: | 5153
|
| 结束页码: | 5158
|
| 语种: | 英语
|
| 英文关键词: | frontal ablation
; submarine melting
; tidewater glaciers
|
| Scopus关键词: | Direct impact
; Freshwater discharge
; Glacial runoff
; Glacier ice
; High rate
; Keypoints
; Melt flux
; Tidewater glaciers
; Ablation
; Global warming
; Melting
; Runoff
; Storms
; Submarines
; ablation
; discharge
; glacial environment
; global warming
; melting
; runoff
; seawater
; submarine
; upwelling
; Alaska
; LeConte Glacier
; United States
|
| 英文摘要: | We show that subglacial freshwater discharge is the principal process driving high rates of submarine melting at tidewater glaciers. This buoyant discharge draws in warm seawater, entraining it in a turbulent upwelling flow along the submarine face that melts glacier ice. To capture the effects of subglacial discharge on submarine melting, we conducted 4 days of hydrographic transects during late summer 2012 at LeConte Glacier, Alaska. A major rainstorm allowed us to document the influence of large changes in subglacial discharge. We found strong submarine melt fluxes that increased from 9.1 ± 1.0 to 16.8 ± 1.3 m d-1 (ice face equivalent frontal ablation) as a result of the rainstorm. With projected continued global warming and increased glacial runoff, our results highlight the direct impact that increases in subglacial discharge will have on tidewater outlet systems. These effects must be considered when modeling glacier response to future warming and increased runoff. Key Points Subglacial discharge varied from 130 to 440 m3/s over a 4 day period Submarine melting at the face correspondingly increased from 9 to 17 m d-1 Global warming will increase subglacial discharge impacting tidewater systems ©2013. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84885354739&doi=10.1002%2fgrl.51011&partnerID=40&md5=ad045df41833733a9d3e40370673435e
|
| Citation statistics: |
|
| 资源类型: | 期刊论文
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/5749
|
| Appears in Collections: | 气候减缓与适应
|
|
There are no files associated with this item.
|
|
作者单位: | Geophysical Institute, University of Alaska Fairbanks, 903 Koyukuk Drive, Fairbanks, AK 99775, United States
|
| Recommended Citation: | |
Motyka R.J.,Dryer W.P.,Amundson J.,et al. Rapid submarine melting driven by subglacial discharge, LeConte Glacier, Alaska[J]. Geophysical Research Letters,2013-01-01,40(19).
|
|
|