DOI: 10.5194/hess-24-2003-2020
论文题名: Revisiting extreme precipitation amounts over southern South America and implications for the Patagonian Icefields
作者: Sauter T.
刊名: Hydrology and Earth System Sciences
ISSN: 1027-5606
出版年: 2020
卷: 24, 期: 4 起始页码: 2003
结束页码: 2016
语种: 英语
Scopus关键词: Biodiversity
; Precipitation (meteorology)
; Sea level
; Environmental change
; Environmental conditions
; Environmental phenomena
; Extreme precipitation
; Mean precipitation
; Net primary production
; Southern south america
; Surface mass balance
; Climate change
; climate change
; environmental change
; environmental conditions
; extreme event
; fjord
; hydrometeorology
; ice field
; precipitation (climatology)
; sea level change
; Patagonia
英文摘要: Patagonia is thought to be one of the wettest regions on Earth, although available regional precipitation estimates vary considerably. This uncertainty complicates understanding and quantifying the observed environmental changes, such as glacier recession, biodiversity decline in fjord ecosystems and enhanced net primary production. The Patagonian Icefields, for example, are one of the largest contributors to sea-level rise outside the polar regions, and robust hydroclimatic projections are needed to understand and quantify current and future mass changes. The reported projections of precipitation from numerical modelling studies tend to overestimate those from in situ determinations, and the plausibility of these numbers has never been carefully scrutinized, despite the significance of this topic to our understanding of observed environmental changes. Here I use simple physical arguments and a linear model to test the plausibility of the current precipitation estimates and its impact on the Patagonian Icefields. The results show that environmental conditions required to sustain a mean precipitation amount exceeding 6.09±0.64 m yr-1 are untenable according to the regional moisture flux. The revised precipitation values imply a significant reduction in the surface mass balance of the Patagonian Icefields compared to previously reported values. This yields a new perspective on the response of Patagonia's glaciers to climate change and their sea-level contribution and might also help reduce uncertainties in the change of other precipitation-driven environmental phenomena.. © 2020 BMJ Publishing Group. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/162720
Appears in Collections: 气候变化与战略
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作者单位: Sauter, T., Climate System Research Group, Institute of Geography, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany
Recommended Citation:
Sauter T.. Revisiting extreme precipitation amounts over southern South America and implications for the Patagonian Icefields[J]. Hydrology and Earth System Sciences,2020-01-01,24(4)