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| DOI | 10.1016/j.coldregions.2024.104206 |
| Spatial heterogeneity and temporal tendency of channeled snow avalanche activity retrieved from Landsat images in the maritime snow climate of the Parlung Tsangpo catchment, southeastern Tibet | |
| 发表日期 | 2024 |
| ISSN | 0165-232X |
| EISSN | 1872-7441 |
| 起始页码 | 223 |
| 卷号 | 223 |
| 英文摘要 | The spatial heterogeneity and temporal tendency of snow avalanche (hereafter called avalanche) activities are responses to variations in the inducing environment under climate warming and epitomize the repercussions of the global cryosphere on climate warming. This paper focuses on channeled avalanches in the marine snow climate region of the Parlung Tsangpo catchment in southeast Tibet as an example. Through field investigations, we identify the spatial extents of avalanche paths, while historical avalanche flow paths from the past 35 years (1986/1987-2021/2022) within these paths are interpreted using Landsat optical images. Statistical analysis is then employed to derive spatial heterogeneity and temporal tendencies within and between years. The results indicate that the runout altitudes of historical avalanches primarily range from 3468 m to 4051 m, with average flow directions predominantly following the northwest, north and northeast directions. Avalanche activity peaks between February and April, with longer runout distances observed during this period. Regarding interannual regularity, the evolution of the runout distance, runout altitude, and height difference of avalanche flow paths over the past 35 years demonstrates a cyclic evolution akin to a sine function. Additionally, a moderate correlation between the interannual variation in historical avalanche activity intensity and the Southern Oscillation Index was observed. These findings strengthen the understanding of the temporal evolutionary pattern of avalanches in response to climate warming, providing valuable insights into the channeled avalanche occurrences in the maritime snow climate of southeastern Tibet. |
| 英文关键词 | Channeled snow avalanche; Spatial heterogeneity; Temporal tendency; Landsat satellites; Maritime snow climate; Parlung Tsangpo catchment |
| 语种 | 英语 |
| WOS研究方向 | Engineering ; Geology |
| WOS类目 | Engineering, Environmental ; Engineering, Civil ; Geosciences, Multidisciplinary |
| WOS记录号 | WOS:001235883600001 |
| 来源期刊 | COLD REGIONS SCIENCE AND TECHNOLOGY
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| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/286758 |
| 作者单位 | Xihua University; Sichuan University; Southwest Jiaotong University; Sichuan University; Yibin University; Xihua University |
| 推荐引用方式 GB/T 7714 | . Spatial heterogeneity and temporal tendency of channeled snow avalanche activity retrieved from Landsat images in the maritime snow climate of the Parlung Tsangpo catchment, southeastern Tibet[J],2024,223. |
| APA | (2024).Spatial heterogeneity and temporal tendency of channeled snow avalanche activity retrieved from Landsat images in the maritime snow climate of the Parlung Tsangpo catchment, southeastern Tibet.COLD REGIONS SCIENCE AND TECHNOLOGY,223. |
| MLA | "Spatial heterogeneity and temporal tendency of channeled snow avalanche activity retrieved from Landsat images in the maritime snow climate of the Parlung Tsangpo catchment, southeastern Tibet".COLD REGIONS SCIENCE AND TECHNOLOGY 223(2024). |
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