Climate Change Data Portal
| DOI | 10.1175/JCLI-D-19-0923.1 |
| Freeze-thaw changes of seasonally frozen ground on the Tibetan Plateau from 1960 to 2014 | |
| Luo S.; Wang J.; Pomeroy J.W.; Lyu S. | |
| 发表日期 | 2020 |
| ISSN | 0894-8755 |
| 起始页码 | 9427 |
| 结束页码 | 9446 |
| 卷号 | 33期号:21 |
| 英文摘要 | The freeze-thaw changes of seasonally frozen ground (SFG) are an important indicator of climate change. Based on observed daily freeze depth of SFG from meteorological stations on the Tibetan Plateau (TP) from 1960 to 2014, the spatial-temporal characteristics and trends in SFG were analyzed, and the relationships between them and climatic and geographical factors were explored. Freeze-thaw changes of SFG on a regional scale were assessed by multiple regression functions. Results showed multiyear mean maximum freeze depth, freeze-thaw duration, freeze start date, and thaw end date that demonstrate obvious distribution characteristics of climatic zones. A decreasing trend in maximum freeze depth and freeze-thaw duration occurred on the TP from 1960 to 2014. The freeze start date has been later, and the thaw end date has been significantly earlier. The freeze-thaw changes of SFG significantly affected by soil hydrothermal conditions on the TP could be assessed by elevation and latitude or by air temperature and precipitation, due to their high correlations. The regional average of maximum freeze depth and freeze-thaw duration caused by climatic and geographical factors were larger than those averaged using meteorological station data because most stations are located at lower altitudes. Maximum freeze depth and freeze-thaw duration have decreased sharply since 2000 on the entire TP. Warming and wetting conditions of the soil resulted in a significant decrease in maximum freeze depth and freeze-thaw duration in the most area of the TP, while drying soil results in a slight increase of them in the southeast of the TP. © 2020 American Meteorological Society. |
| 英文关键词 | Climate change; Freezing; Soils; Distribution characteristics; Hydrothermal conditions; Meteorological station; Multiple regressions; Seasonally frozen ground; Spatial-temporal characteristics; Tibetan Plateau; Wetting conditions; Thawing; air temperature; climate change; climate effect; freeze-thaw cycle; frozen ground; permafrost; precipitation (climatology); seasonal variation; soil temperature; temperature effect; China; Qinghai-Xizang Plateau |
| 语种 | 英语 |
| 来源期刊 | Journal of Climate
 |
| 来源机构 | 中国科学院西北生态环境资源研究院 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/171059 |
| 作者单位 | Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China; University of Chinese Academy of Sciences, Beijing, China; Centre for Hydrology, University of Saskatchewan, Saskatoon, SK, Canada; School of Atmospheric Sciences, Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, University of Information Technology, Chengdu, China |
| 推荐引用方式 GB/T 7714 | Luo S.,Wang J.,Pomeroy J.W.,et al. Freeze-thaw changes of seasonally frozen ground on the Tibetan Plateau from 1960 to 2014[J]. 中国科学院西北生态环境资源研究院,2020,33(21). |
| APA | Luo S.,Wang J.,Pomeroy J.W.,&Lyu S..(2020).Freeze-thaw changes of seasonally frozen ground on the Tibetan Plateau from 1960 to 2014.Journal of Climate,33(21). |
| MLA | Luo S.,et al."Freeze-thaw changes of seasonally frozen ground on the Tibetan Plateau from 1960 to 2014".Journal of Climate 33.21(2020). |
| 条目包含的文件 | 条目无相关文件。 | |||||
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
