| A new map of permafrost distribution on the Tibetan Plateau | |
| Zou, Defu1,2; Zhao, Lin1; Sheng, Yu2; Chen, Ji2; Hu, Guojie1; Wu, Tonghua1; Wu, Jichun2; Xie, Changwei1; Wu, Xiaodong1; Pang, Qiangqiang1 | |
| 刊名 | CRYOSPHERE
 |
| 2017-11-08 | |
| 卷号 | 11期号:6页码:2527-2542 |
| ISSN号 | 1994-0416 |
| DOI | 10.5194/tc-11-2527-2017 |
| 通讯作者 | Zhao, Lin(linzhao@lzb.ac.cn) |
| 英文摘要 | The Tibetan Plateau (TP) has the largest areas of permafrost terrain in the mid-and low-latitude regions of the world. Some permafrost distribution maps have been compiled but, due to limited data sources, ambiguous criteria, inadequate validation, and deficiency of high-quality spatial data sets, there is high uncertainty in the mapping of the permafrost distribution on the TP. We generated a new permafrost map based on freezing and thawing indices from modified Moderate Resolution Imaging Spectroradiometer (MODIS) land surface temperatures (LSTs) and validated this map using various ground-based data sets. The soil thermal properties of five soil types across the TP were estimated according to an empirical equation and soil properties (moisture content and bulk density). The temperature at the top of permafrost (TTOP) model was applied to simulate the permafrost distribution. Permafrost, seasonally frozen ground, and unfrozen ground covered areas of 1.06 x 10(6) km(2) (0.97-1.15 x 10(6) km(2), 90% confidence interval) (40 %), 1.46 x 10(6) (56 %), and 0.03 x 10(6) km(2) (1 %), respectively, excluding glaciers and lakes. Ground-based observations of the permafrost distribution across the five investigated regions (IRs, located in the transition zones of the permafrost and seasonally frozen ground) and three highway transects (across the entire permafrost regions from north to south) were used to validate the model. Validation results showed that the kappa coefficient varied from 0.38 to 0.78 with a mean of 0.57 for the five IRs and 0.62 to 0.74 with a mean of 0.68 within the three transects. Compared with earlier studies, the TTOP modelling results show greater accuracy. The results provide more detailed information on the permafrost distribution and basic data for use in future research on the Tibetan Plateau permafrost. |
| 收录类别 | SCI |
| WOS关键词 | LAND-SURFACE TEMPERATURE ; INTERNATIONAL POLAR YEAR ; TEMPORAL VARIATIONS ; THERMAL STATE ; CLIMATE-CHANGE ; SNOW COVER ; MODIS ; CHINA ; VALIDATION ; MODEL |
| WOS研究方向 | Physical Geography ; Geology |
| WOS类目 | Geography, Physical ; Geosciences, Multidisciplinary |
| 语种 | 英语 |
| 出版者 | COPERNICUS GESELLSCHAFT MBH |
| WOS记录号 | WOS:000414668800001 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2557633 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Zhao, Lin |
| 作者单位 | 1.Chinese Acad Sci, NIEER, State Key Lab Cryospher Sci, Cryosphere Res Stn Qinghai Xizang Plateau, Lanzhou 730000, Gansu, Peoples R China 2.Chinese Acad Sci, State Key Lab Frozen Soil Engn, NIEER, Lanzhou 730000, Gansu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zou, Defu,Zhao, Lin,Sheng, Yu,et al. A new map of permafrost distribution on the Tibetan Plateau[J]. CRYOSPHERE,2017,11(6):2527-2542. |
| APA | Zou, Defu.,Zhao, Lin.,Sheng, Yu.,Chen, Ji.,Hu, Guojie.,...&Cheng, Guodong.(2017).A new map of permafrost distribution on the Tibetan Plateau.CRYOSPHERE,11(6),2527-2542. |
| MLA | Zou, Defu,et al."A new map of permafrost distribution on the Tibetan Plateau".CRYOSPHERE 11.6(2017):2527-2542. |
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