Magnitude and direction of green-up date in response to drought depend on background climate over Mongolian grassland
文献类型：期刊论文
| 作者 | Bai, Wenrui1,2; Wang, Huanjiong2; Lin, Shaozhi1,2 |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2023-12-01 |
| 卷号 | 902页码:11 |
| 关键词 | Drought Green-up date Grassland Mongolian Plateau Productivity Climate change |
| ISSN号 | 0048-9697 |
| DOI | 10.1016/j.scitotenv.2023.166051 |
| 通讯作者 | Wang, Huanjiong(wanghj@igsnrr.ac.cn) |
| 英文摘要 | Increasing drought is one major consequence of ongoing global climate change and is expected to cause significant changes in vegetation phenology, especially for naturally vulnerable ecosystems such as grassland. However, the linkage between the response characteristic of green-up date (GUD) to drought and background climate remains largely unknown. Here, we focused on how the GUD of Mongolian grassland responds to extreme drought events (EDE). We first extracted the GUD from the MODIS Enhanced Vegetation Index data during 2001-2020 and identified the preseason EDE using the standardized precipitation evapotranspiration index data. Subsequently, we quantified the response of GUD to preseason EDE (DGUD) in each pixel as the difference in GUD between drought and normal years. The effect of 12 factors on DGUD was analyzed using the random forest algorithm. The results showed that the GUD under EDE may delay or advance by > 20 days compared to normal years. For the regions with mean annual temperature >-2 ?C, the GUD was delayed under EDE due to the dominant role of water restriction on GUD, while the GUD was advanced under EDE in colder areas due to the warmer temperature during drought. However, the magnitude of delay in GUD under drought was greater in regions with less precipitation and more severe droughts. Our results could help to develop appropriate management strategies to mitigate the impacts of drought on grasslands. |
| WOS关键词 | SPRING PHENOLOGY ; VEGETATION DYNAMICS ; INNER-MONGOLIA ; HIGH-LATITUDES ; PRODUCTIVITY ; SENSITIVITY ; ECOSYSTEMS ; CHINA ; EVAPOTRANSPIRATION ; PRECIPITATION |
| 资助项目 | Strategic Priority Research Program of Chinese Academy of Sciences[XDA26010202] ; National Key Research and Development Program of China[2018YFA0606103] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:001065825400001 |
| 出版者 | ELSEVIER |
| 资助机构 | Strategic Priority Research Program of Chinese Academy of Sciences ; National Key Research and Development Program of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/198073]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Wang, Huanjiong |
| 作者单位 | 1.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Key Lab Land Surface Pattern & Simulat, Inst Geog Sci & Nat Resources Res, 11A Datun Rd, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Bai, Wenrui,Wang, Huanjiong,Lin, Shaozhi. Magnitude and direction of green-up date in response to drought depend on background climate over Mongolian grassland[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2023,902:11. |
| APA | Bai, Wenrui,Wang, Huanjiong,&Lin, Shaozhi.(2023).Magnitude and direction of green-up date in response to drought depend on background climate over Mongolian grassland.SCIENCE OF THE TOTAL ENVIRONMENT,902,11. |
| MLA | Bai, Wenrui,et al."Magnitude and direction of green-up date in response to drought depend on background climate over Mongolian grassland".SCIENCE OF THE TOTAL ENVIRONMENT 902(2023):11. |
入库方式： OAI收割
来源：地理科学与资源研究所
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