Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018WR024206 |
Decadal-Scale Climate Forcing of Alpine Glacial Hydrological Systems | |
Lane, S. N.1; Nienow, P. W.2 | |
2019-03-01 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2019 |
卷号 | 55期号:3页码:2478-2492 |
文章类型 | Article |
语种 | 英语 |
国家 | Switzerland; Scotland |
英文摘要 | Quantification of climate forcing of glacial hydrological systems at the decadal scale is rare because most measurement stations are too far downstream for glacier impacts to be clearly detected. Here we apply a measure of daily hydrograph entropy to a unique set of reliable, high-altitude gauging stations, dating from the late 1960s. We find a progressive shift to a greater number of days with diurnal discharge variation as well as more pronounced diurnal discharge amplitude. These changes were associated with the onset of rapid warming in the 1980s as well as declining end of winter snow depths as inferred from climate data. In glaciated catchments, lower winter snow depths reduce the magnitude and duration of snowpack buffering and encourage the earlier onset of glacier ice exposure, with associated lower surface albedo and more rapid melt. Together, these processes explain the increase in the observed intensity of diurnal discharge fluctuations. Plain Language Summary River basins that have a high proportion of ice cover are particularly sensitive to climate warming. Daily variations in insolation and temperature typically lead to fluctuations in snow and/or ice melt and thus a daily rise and fall in river flow. Snow, and the glaciers themselves, can buffer this rise and fall. For six high mountain Alpine basins, we show that daily discharge fluctuations are changing due to climate warming at the decadal scale, with both increasing daily discharge maxima and reducing daily discharge minima. These changes reflect decreased snow accumulation at the end of winter, reducing the buffering and increasing the onset of rapid glacier melt. |
英文关键词 | subglacial hydrology runoff discharge diurnal glacier climate change |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000464660000037 |
WOS关键词 | DEBRIS-COVERED GLACIERS ; SEDIMENT EXPORT ; SEASONAL EVOLUTION ; WATER-FLOW ; RUNOFF ; STREAMFLOW ; TEMPERATURE ; ENTROPY ; MODEL ; MELT |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/181585 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Lausanne, Inst Earth Surface Dynam, Lausanne, Switzerland; 2.Univ Edinburgh, Sch GeoSci, Edinburgh, Midlothian, Scotland |
推荐引用方式 GB/T 7714 | Lane, S. N.,Nienow, P. W.. Decadal-Scale Climate Forcing of Alpine Glacial Hydrological Systems[J]. WATER RESOURCES RESEARCH,2019,55(3):2478-2492. |
APA | Lane, S. N.,&Nienow, P. W..(2019).Decadal-Scale Climate Forcing of Alpine Glacial Hydrological Systems.WATER RESOURCES RESEARCH,55(3),2478-2492. |
MLA | Lane, S. N.,et al."Decadal-Scale Climate Forcing of Alpine Glacial Hydrological Systems".WATER RESOURCES RESEARCH 55.3(2019):2478-2492. |
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