| Thaw Depth Determines Dissolved Organic Carbon Concentration and Biodegradability on the Northern Qinghai-Tibetan Plateau | |
| Mu, C. C.1,2; Abbott, B. W.3,4; Wu, X. D.2; Zhao, Q.1; Wang, H. J.1; Su, H.1; Wang, S. F.1; Gao, T. G.1; Guo, H.1; Peng, X. Q.1 | |
| 刊名 | GEOPHYSICAL RESEARCH LETTERS
 |
| 2017-09-28 | |
| 卷号 | 44期号:18页码:9389-9399 |
| 关键词 | permafrost active layer thaw depth thermokarst seasonality flow path |
| ISSN号 | 0094-8276 |
| DOI | 10.1002/2017GL075067 |
| 通讯作者 | Wu, X. D.(wxd565@163.com) ; Zhang, T. J.(tjzhang@lzu.edu.cn) |
| 英文摘要 | The response of dissolved organic carbon (DOC) flux to permafrost degradation is one of the major sources of uncertainty in predicting the permafrost carbon feedback. We investigated DOC export and properties over two complete flow seasons in a catchment on the northern Qinghai-Tibetan Plateau. DOC concentration and biodegradability decreased systematically as thaw depth increased through the season, attributable to changing carbon sources and degree of microbial processing. Increasing DOC aromaticity and C-13-DOC indicated shifts toward more recalcitrant carbon sources and greater residence time in soils prior to reaching the stream network. These strong and consistent seasonal trends suggest that gradual active layer deepening may decrease DOC export and biodegradability from permafrost catchments. Because these patterns are opposite observations from areas experiencing abrupt permafrost collapse (thermokarst), the overall impact of permafrost degradation on DOC flux and biodegradability may depend on the proportion of the landscape experiencing gradual thaw versus thermokarst. |
| 收录类别 | SCI |
| WOS关键词 | HEIHE RIVER-BASIN ; PERMAFROST-CARBON ; SOIL CARBON ; CHEMICAL-COMPOSITION ; NORTHWESTERN CHINA ; HEADWATER STREAMS ; ALPINE CATCHMENT ; WESTERN SIBERIA ; CLIMATE-CHANGE ; ARCTIC RIVERS |
| WOS研究方向 | Geology |
| WOS类目 | Geosciences, Multidisciplinary |
| 语种 | 英语 |
| 出版者 | AMER GEOPHYSICAL UNION |
| WOS记录号 | WOS:000413148100034 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2557700 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Wu, X. D.; Zhang, T. J. |
| 作者单位 | 1.Lanzhou Univ, Coll Earth & Environm Sci, Key Lab Western Chinas Environm Syst, Lanzhou, Gansu, Peoples R China 2.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resource, State Key Lab Cryospher Sci, Cryosphere Res Stn Qinghai Tibet Plateau, Lanzhou, Gansu, Peoples R China 3.Brigham Young Univ, Dept Plant & Wildlife Sci, Provo, UT 84602 USA 4.Michigan State Univ, Dept Earth & Environm Sci, E Lansing, MI 48824 USA |
| 推荐引用方式 GB/T 7714 | Mu, C. C.,Abbott, B. W.,Wu, X. D.,et al. Thaw Depth Determines Dissolved Organic Carbon Concentration and Biodegradability on the Northern Qinghai-Tibetan Plateau[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(18):9389-9399. |
| APA | Mu, C. C..,Abbott, B. W..,Wu, X. D..,Zhao, Q..,Wang, H. J..,...&Zhang, T. J..(2017).Thaw Depth Determines Dissolved Organic Carbon Concentration and Biodegradability on the Northern Qinghai-Tibetan Plateau.GEOPHYSICAL RESEARCH LETTERS,44(18),9389-9399. |
| MLA | Mu, C. C.,et al."Thaw Depth Determines Dissolved Organic Carbon Concentration and Biodegradability on the Northern Qinghai-Tibetan Plateau".GEOPHYSICAL RESEARCH LETTERS 44.18(2017):9389-9399. |
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