Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL073219 |
Carbon dating reveals a seasonal progression in the source of particulate organic carbon exported from the Greenland Ice Sheet | |
Kohler, T. J.1; Zarsky, J. D.1; Yde, J. C.2; Lamarche-Gagnon, G.3; Hawkings, J. R.3; Tedstone, A. J.3; Wadham, J. L.3; Box, J. E.4; Beaton, A. D.5; Stibal, M.1 | |
2017-06-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:12 |
文章类型 | Article |
语种 | 英语 |
国家 | Czech Republic; Norway; England; Denmark |
英文摘要 | Surface melt from the Greenland Ice Sheet (GrIS) collects particulate organic carbon (POC) as it drains into subglacial environments and transports it downstream where it serves as a microbial substrate. We hypothesized that older POC is entrained by meltwaters as the subglacial drainage network expands upglacier over the summer. To test this, POC samples were collected from a meltwater river exiting the GrIS over an ablation season and C-14 dated. Resulting values were compared with meltwater hydrochemistry and satellite observations of the catchment area. We found that POC ages increased from similar to 5000 to similar to 9000 years B.P. until peak discharge and catchment size. Afterward, significant fluctuations in POC age were observed, interpreted to result from periods of high and low subglacial hydrological pressure and sediment supply and subsequent exhaustion. These observations suggest a seasonal progression in the source of POC exported from the GrIS and provide evidence for a seasonally evolving subglacial drainage system. |
英文关键词 | meltwater export particulate organic carbon glacial hydrology subglacial drainage system Kangerlussuaq Leverett Glacier |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000405854200039 |
WOS关键词 | SUBGLACIAL DRAINAGE ; POTENTIAL ACTIVITY ; WEST GREENLAND ; OUTLET GLACIER ; BENEATH ; MATTER ; ECOSYSTEMS ; EVOLUTION ; ACCELERATION ; HYDROLOGY |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
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/27100 |
专题 | 气候变化 |
作者单位 | 1.Charles Univ Prague, Dept Ecol, Fac Sci, Prague, Czech Republic; 2.Western Norway Univ Appl Sci, Fac Sci & Engn, Sogndal, Norway; 3.Univ Bristol, Sch Geog Sci, Bristol Glaciol Ctr, Bristol, Avon, England; 4.Geol Survey Denmark & Greenland, Dept Glaciol & Climate, Copenhagen, Denmark; 5.Natl Oceanog Ctr, Southampton, Hants, England |
推荐引用方式 GB/T 7714 | Kohler, T. J.,Zarsky, J. D.,Yde, J. C.,et al. Carbon dating reveals a seasonal progression in the source of particulate organic carbon exported from the Greenland Ice Sheet[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(12). |
APA | Kohler, T. J..,Zarsky, J. D..,Yde, J. C..,Lamarche-Gagnon, G..,Hawkings, J. R..,...&Stibal, M..(2017).Carbon dating reveals a seasonal progression in the source of particulate organic carbon exported from the Greenland Ice Sheet.GEOPHYSICAL RESEARCH LETTERS,44(12). |
MLA | Kohler, T. J.,et al."Carbon dating reveals a seasonal progression in the source of particulate organic carbon exported from the Greenland Ice Sheet".GEOPHYSICAL RESEARCH LETTERS 44.12(2017). |
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