Estimating the peak of growing season (POS) of China's terrestrial ecosystems
文献类型：期刊论文
| 作者 | Wang, Xiaoyue1; Wu, Chaoyang1,2 |
| 刊名 | AGRICULTURAL AND FOREST METEOROLOGY
 |
| 出版日期 | 2019-11-15 |
| 卷号 | 278页码:11 |
| 关键词 | Peak of growing season SG-cubic spline Climate control GPP |
| ISSN号 | 0168-1923 |
| DOI | 10.1016/j.agrformet.2019.107639 |
| 通讯作者 | Wu, Chaoyang(wucy@igsnrr.ac.cn) |
| 英文摘要 | Vegetation phenology is a sensitive indicator of climate change and has substantial impacts on ecosystem carbon uptake. Previous studies have revealed the importance of the start and end of growing season and investigated their dynamics with climate change. However, the interannual variability of the peak of growing season (POS), which also plays a crucial role in carbon cycle of terrestrial ecosystems, has not been well documented. Here, we used field observations from regional flux measurements to evaluate four methods in POS extraction based on time series of satellite observed normalized difference vegetation index (NDVI). Results showed that the combination of Savitzky-Golay filter and cubic spline (SG-cubic spline) method had overall higher accuracy (R-2=0.77, RMSE=8.3 days) than current approaches for POS detection. We then analyzed the spatial and temporal patterns of POS in China during 1982-2015 and found an overall advanced trend of POS in most regions, but variations were also observed among biomes. Preseason temperature was the most important factor controlling POS for about 25.6% of all pixels, followed by radiation (19.7%) and precipitation (14.6%), respectively. A higher temperature overall advanced POS, while influences of precipitation and radiation were highly biome-dependent. We further investigated the impacts of POS on plant productivity and found that an advanced POS would increase annual GPP, but this relationship was opposite in arid regions, highlighting the role of soil moisture in dry areas. Our study is meaningful for deepening the understanding between phenology and carbon cycling with respect to future climate change. |
| WOS关键词 | CLIMATE-CHANGE ; VEGETATION PHENOLOGY ; NORTHERN-HEMISPHERE ; AUTUMN PHENOLOGY ; TIBETAN PLATEAU ; GREEN-UP ; FEEDBACKS ; IMPACTS ; PRECIPITATION ; CO2 |
| 资助项目 | National Key R&D program of China[2018YFA0606101] ; National Natural Science Foundation of China[41871255] ; Key Research Program of Frontier Sciences, CAS[QYZDB-SSW-DQC011] ; China Postdoctoral Science Foundation[2019M650819] |
| WOS研究方向 | Agriculture ; Forestry ; Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000500196400004 |
| 出版者 | ELSEVIER |
| 资助机构 | National Key R&D program of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Sciences, CAS ; China Postdoctoral Science Foundation |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/130160]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Wu, Chaoyang |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Xiaoyue,Wu, Chaoyang. Estimating the peak of growing season (POS) of China's terrestrial ecosystems[J]. AGRICULTURAL AND FOREST METEOROLOGY,2019,278:11. |
| APA | Wang, Xiaoyue,&Wu, Chaoyang.(2019).Estimating the peak of growing season (POS) of China's terrestrial ecosystems.AGRICULTURAL AND FOREST METEOROLOGY,278,11. |
| MLA | Wang, Xiaoyue,et al."Estimating the peak of growing season (POS) of China's terrestrial ecosystems".AGRICULTURAL AND FOREST METEOROLOGY 278(2019):11. |
入库方式： OAI收割
来源：地理科学与资源研究所
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