Spatial and temporal variations in the end date of the vegetation growing season throughout the Qinghai-Tibetan Plateau from 1982 to 2011
文献类型：SCI/SSCI论文
| 作者 | Che M. L. ; Chen B. Z. ; Innes J. L. ; Wang G. Y. ; Dou X. M. ; Zhou T. M. ; Zhang H. F. ; Yan J. W. ; Xu G. ; Zhao H. W. |
| 发表日期 | 2014 |
| 关键词 | Autumn phenology End date of the vegetation growing season (EGS) Spatial-temporal variation AVHRR LAI Qinghai-Tibetan Plateau time-series spring phenology mann-kendall temperature variability dynamics patterns europe trends tests |
| 英文摘要 | The spatial and temporal variations in the end date of the vegetation growing season (EGS) and their relationships with climate factors across the Qinghai-Tibetan Plateau yet have not been well researched. In this study, we used the rate of the change in the curvature of the S-curve function which integrated a logistic function and an asymmetric Gaussian function and showed a better performance for fitting the LAI (leaf area index) data to extract the EGS from a long-term time series of AVHRR (advanced very high resolution radiometer) LAI data. The spatial distribution pattern of the EGS averaged from 1982 to 2011 presented a gradual decrease from the southeast to northwest plateau. The various vegetation types showed different phenological EGS timing. The EGS occurred earlier with increasing altitude (slope = -3 day km(-1), p < 0.001). Throughout the entire Qinghai-Tibetan Plateau, the monthly air temperature and precipitation were positively correlated with the EGS, whereas the monthly sunshine duration showed a negative correlation. At the regional scale, a less pronounced increasing EGS trend (shifting about 1 day over 24 years, p = 0.084) was observed during the entire study period. By analyzing the trend turning points, we found that the EGS occurred later during 1982-1994 (slope = 0.155 day yr(-1), p = 0.045) and 1999-2011 (slope = 0.096 day yr(-1), p = 0.3), but occurred earlier during 1994-1999 (slope = -0.373 day yr(-1),p = 0.049). During 1982-2011, the annual changes of EGS negatively correlated with precipitation (p < 0.1) in June, but positively with precipitation (p < 0.1) in August. As the same time, the annual changes of EGS positively correlated with sunshine duration (p < 0.1) in June, yet negatively with sunshine duration (p < 0.1) in August. During 1982-1994, the annual changes of EGS positively correlated with air temperature (p < 0.01) and negatively with precipitation (p < 0.1) in June. During 1994-1999, the annual changes of EGS only negatively correlated with air temperature (p < 0.05)in August. During 1999-2011, the annual changes of EGS only negatively correlated with sunshine duration (p < 0.1) in August. (C) 2014 Elsevier B.V. All rights reserved. |
| 出处 | Agricultural and Forest Meteorology |
| 卷 | 189 |
| 页 | 81-90 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0168-1923 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/29957]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Che M. L.,Chen B. Z.,Innes J. L.,et al. Spatial and temporal variations in the end date of the vegetation growing season throughout the Qinghai-Tibetan Plateau from 1982 to 2011. 2014. |
入库方式： OAI收割
来源：地理科学与资源研究所
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