DOI: 10.1038/ngeo2331
论文题名: Storage and release of organic carbon from glaciers and ice sheets
作者: Hood E. ; Battin T.J. ; Fellman J. ; O'neel S. ; Spencer R.G.M.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2015
卷: 8, 期: 2 起始页码: 91
结束页码: 96
语种: 英语
Scopus关键词: carbon flux
; dissolved organic carbon
; glacial hydrology
; glaciochemistry
; ice sheet
; organic carbon
; Southern Ocean
英文摘要: Polar ice sheets and mountain glaciers, which cover roughly 11% of the Earth's land surface, store organic carbon from local and distant sources and then release it to downstream environments. Climate-driven changes to glacier runoff are expected to be larger than climate impacts on other components of the hydrological cycle, and may represent an important flux of organic carbon. A compilation of published data on dissolved organic carbon from glaciers across five continents reveals that mountain and polar glaciers represent a quantitatively important store of organic carbon. The Antarctic Ice Sheet is the repository of most of the roughly 6 petagrams (Pg) of organic carbon stored in glacier ice, but the annual release of glacier organic carbon is dominated by mountain glaciers in the case of dissolved organic carbon and the Greenland Ice Sheet in the case of particulate organic carbon. Climate change contributes to these fluxes: approximately 13% of the annual flux of glacier dissolved organic carbon is a result of glacier mass loss. These losses are expected to accelerate, leading to a cumulative loss of roughly 15 teragrams (Tg) of glacial dissolved organic carbon by 2050 due to climate change-equivalent to about half of the annual flux of dissolved organic carbon from the Amazon River. Thus, glaciers constitute a key link between terrestrial and aquatic carbon fluxes, and will be of increasing importance in land-to-ocean fluxes of organic carbon in glacierized regions. © 2015 Macmillan Publishers Limited. All rights reserved Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106313
Appears in Collections: 气候减缓与适应 科学计划与规划
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作者单位: Environmental Science and Geography Program, University of Alaska Southeast, Juneau, AK, United States; Stream Biofilm and Ecosystem Research Laboratory, School of Architecture, Civil and Environmental Engineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland; Alaska Science Center, US Geological Survey, Anchorage, AK, United States; Department of Earth, Ocean and Atmospheric Science, Florida State University, Tallahassee, FL, United States
Recommended Citation:
Hood E.,Battin T.J.,Fellman J.,et al. Storage and release of organic carbon from glaciers and ice sheets[J]. Nature Geoscience,2015-01-01,8(2)