Responses of greenhouse gas fluxes to climate extremes in a semiarid grassland
文献类型：期刊论文
| 作者 | Li, Linfeng1; Fan, Wenyu1; Kang, Xiaoming2; Wang, Yanfen1; Cui, Xiaoyong1; Xu, Chengyuan3; Griffin, Kevin L.4; Hao, Yanbin1 |
| 刊名 | Atmospheric environment
 |
| 出版日期 | 2016-10-01 |
| 卷号 | 142页码:32-42 |
| ISSN号 | 1352-2310 |
| 关键词 | Extreme drought Heat wave Co2 flux Ch4 flux N2o flux Soli water content |
| DOI | 10.1016/j.atmosenv.2016.07.039 |
| 通讯作者 | Cui, xiaoyong(cuixy@ucas.ac.cn) ; Hao, yanbin(ybhao@ucas.ac.cn) |
| 英文摘要 | Climate extremes are expected to increase in frequency and intensity as a consequence of anthropogenic climate change attributed to the rise of atmospheric concentrations of greenhouse gases (ghgs). however, studies on the impacts of climate extremes on terrestrial ecosystems are limited. here, we experimentally imposed extreme drought and a heat wave (similar to 60-year recurrence) to investigate their effects on ghgs fluxes of a semiarid grassland in china. we estimated a 16% and 38% percent reduction in net ecosystem co2 uptake caused by the heat wave and drought respectively, but via different mechanisms. drought reduced gross ecosystem productively (gep) and to a lower extent ecosystem respiration (er). by contrast, the simulated heat wave suppressed only gep while er remained stable. the climate extremes also created a legacy effect on gep and nee lasting until the end of the growing season, whereas er recovered immediately. although ch4 and n2o fluxes were unaffected by the heat wave, drought promoted ch4 uptake and suppressed n2o emission during the treatment period. the effect of drought on ghgs fluxes generally overwhelmed that of the heat wave treatment, and there were no interactive effects of these two types of climate extremes. our results showed that responses of ecosystem ghgs exchange to climate extremes are strongly regulated by soil moisture status. in conclusion, future amplification of climate extremes could decrease the sink for ghgs, especially co2, in this semiarid grasslands. (c) 2016 elsevier ltd. all rights reserved. |
| WOS关键词 | TEMPERATE STEPPE ; N2O EMISSIONS ; CO2 FLUXES ; SUMMER DROUGHT ; CARBON-DIOXIDE ; INNER-MONGOLIA ; SOIL ; ECOSYSTEM ; NITROGEN ; EVENTS |
| WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
| WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| WOS记录号 | WOS:000383293100004 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2376069 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Cui, Xiaoyong; Hao, Yanbin |
| 作者单位 | 1.Univ Chinese Acad Sci, Coll Life Sci, Beijing 100049, Peoples R China 2.Chinese Acad Forestry, Inst Wetland Res, Beijing 100091, Peoples R China 3.Cent Queensland Univ, Sch Med & Appl Sci, Bundaberg, Qld 4670, Australia 4.Columbia Univ, Lamont Doherty Earth Observ, Dept Earth & Environm Sci, Palisades, NY 10964 USA |
| 推荐引用方式 GB/T 7714 | Li, Linfeng,Fan, Wenyu,Kang, Xiaoming,et al. Responses of greenhouse gas fluxes to climate extremes in a semiarid grassland[J]. Atmospheric environment,2016,142:32-42. |
| APA | Li, Linfeng.,Fan, Wenyu.,Kang, Xiaoming.,Wang, Yanfen.,Cui, Xiaoyong.,...&Hao, Yanbin.(2016).Responses of greenhouse gas fluxes to climate extremes in a semiarid grassland.Atmospheric environment,142,32-42. |
| MLA | Li, Linfeng,et al."Responses of greenhouse gas fluxes to climate extremes in a semiarid grassland".Atmospheric environment 142(2016):32-42. |
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来源：中国科学院大学
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