Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1088/1748-9326/ab23d4 |
Contrasting responses in dissolved organic carbon to extreme climate events from adjacent boreal landscapes in Northern Sweden | |
Tiwari, Tejshree1; Sponseller, Ryan A.2; Laudon, Hjalmar1 | |
2019-08-01 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS |
ISSN | 1748-9326 |
出版年 | 2019 |
卷号 | 14期号:8 |
文章类型 | Article |
语种 | 英语 |
国家 | Sweden |
英文摘要 | The ongoing pressures of climate change, as expressed by the increased intensity, duration, and frequency of temperature and precipitation events, threatens the storage of carbon in northern latitudes. One key concern is how these events will affect the production, mobilization, and export of dissolved organic carbon (DOC), the main form of aquatic carbon export in these regions. In this study, we retrospectively show contrasting effects of climate extremes over 23 years on two adjacent boreal catchments, one dominated by forest cover and the other draining a mire (wetland), despite experiencing the same extreme climate events. During the peak snowmelt, DOC concentrations ranged from 20 to 33 mg l(-1) in the forest catchment and 10-28 mg l(-1) in the mire catchment respectively, highlighting large inter-annual variation in the springtime hydrologicCexport at both sites. Weused climate and discharge variables to predict this variation, and found that DOC from the forested catchment, which is derived largely from riparian soils, had the highest concentrations following cold summers, dry autumns, and winters with high precipitation. By contrast, in the mire outlet, where DOC is primarily derived from decomposing peat, the highest DOC concentrations in the spring followed cold/dry winters and dry summers. Our results indicate that processes regulating stream DOC concentrations during spring in both catchments were dependent on both temperature and precipitation in multiple seasons. Together, these patterns suggest that DOC responses to climatic extremes are complex and generate variable patterns in springtime concentrations that are strongly dependent upon landscape context. |
英文关键词 | extreme climate events boreal streams peatland boreal forest climate change water quality dissolve organic carbon |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000476829600007 |
WOS关键词 | VARIABLE SELECTION METHODS ; LONG-TERM CHANGES ; DOC EXPORT ; TEMPORAL VARIABILITY ; SURFACE WATERS ; TEMPERATURE ; DECOMPOSITION ; HEADWATER ; DYNAMICS ; RUNOFF |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
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/185632 |
专题 | 气候变化 |
作者单位 | 1.Swedish Univ Agr Sci, Dept Forest Ecol & Management, SE-90183 Umea, Sweden; 2.Umea Univ, Dept Ecol & Environm Sci, SE-90187 Umea, Sweden |
推荐引用方式 GB/T 7714 | Tiwari, Tejshree,Sponseller, Ryan A.,Laudon, Hjalmar. Contrasting responses in dissolved organic carbon to extreme climate events from adjacent boreal landscapes in Northern Sweden[J]. ENVIRONMENTAL RESEARCH LETTERS,2019,14(8). |
APA | Tiwari, Tejshree,Sponseller, Ryan A.,&Laudon, Hjalmar.(2019).Contrasting responses in dissolved organic carbon to extreme climate events from adjacent boreal landscapes in Northern Sweden.ENVIRONMENTAL RESEARCH LETTERS,14(8). |
MLA | Tiwari, Tejshree,et al."Contrasting responses in dissolved organic carbon to extreme climate events from adjacent boreal landscapes in Northern Sweden".ENVIRONMENTAL RESEARCH LETTERS 14.8(2019). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论