Green-up dates in the Tibetan Plateau have continuously advanced from 1982 to 2011
文献类型：SCI/SSCI论文
| 作者 | Zhang G. L. ; Zhang Y. J. ; Dong J. W. ; Xiao X. M. |
| 发表日期 | 2013 |
| 关键词 | difference vegetation index delayed spring phenology net primary production winter modis temperature regression responses drought trends |
| 英文摘要 | As the Earth's third pole, the Tibetan Plateau has experienced a pronounced warming in the past decades. Recent studies reported that the start of the vegetation growing season (SOS) in the Plateau showed an advancing trend from 1982 to the late 1990s and a delay from the late 1990s to 2006. However, the findings regarding the SOS delay in the later period have been questioned, and the reasons causing the delay remain unknown. Here we explored the alpine vegetation SOS in the Plateau from 1982 to 2011 by integrating three long-term time-series datasets of Normalized Difference Vegetation Index (NDVI): Global Inventory Modeling and Mapping Studies (GIMMS, 1982-2006), SPOT VEGETATION (SPOT-VGT, 1998-2011), and Moderate Resolution Imaging Spectroradiometer (MODIS, 2000-2011). We found GIMMS NDVI in 2001-2006 differed substantially from SPOT-VGT and MODIS NDVIs and may have severe data quality issues in most parts of the western Plateau. By merging GIMMS-based SOSs from 1982 to 2000 with SPOT-VGT-based SOSs from 2001 to 2011 we found the alpine vegetation SOS in the Plateau experienced a continuous advancing trend at a rate of similar to 1.04 d.y(-1) from 1982 to 2011, which was consistent with observed warming in springs and winters. The satellite-derived SOSs were proven to be reliable with observed phenology data at 18 sites from 2003 to 2011; however, comparison of their trends was inconclusive due to the limited temporal coverage of the observed data. Longer-term observed data are still needed to validate the phenology trend in the future. |
| 出处 | Proceedings of the National Academy of Sciences of the United States of America |
| 卷 | 110 |
| 期 | 11 |
| 页 | 4309-4314 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0027-8424 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/30055]  |
| 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 | Zhang G. L.,Zhang Y. J.,Dong J. W.,et al. Green-up dates in the Tibetan Plateau have continuously advanced from 1982 to 2011. 2013. |
入库方式： OAI收割
来源：地理科学与资源研究所
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