主导远程源及其在西藏高原上空的空气中的尘埃的潜在贡献
Jingyi Tang1, Tianhe Wang1,2, Ying Han1,3
1Key Laboratory for Semi-Arid Climate Change of the Ministry of Education College of Atmospheric Sciences Lanzhou University Lanzhou China.
概括
远程尘埃运输显著使西藏高原 (TP) 的高海拔雪地变暗并融化. 一个新的算法将中亚,西亚和南亚的沙漠确定为影响TP雪融的主要尘埃来源.
科学领域:
- 大气科学 大气科学
- 冰川学的冰川学
- 环境科学 环境科学
背景情况:
- 在西藏高原 (TP) 的高海拔雪地变暗和融化主要是由远程运输的尘埃颗粒驱动的.
- 目前对这种空气中的尘埃的远程来源和贡献的全面了解是有限的.
研究的目的:
- 开发和介绍一种新的算法,用于追踪影响TP的空气中的尘埃来源.
- 通过卫星和再分析数据,精确追踪尘埃活动并限制其起源.
主要方法:
- 开发一种新的空气中的尘埃源追踪算法.
- 利用卫星和基于再分析的估计来限制尘埃活动和追踪起源.
- 分析高空空中的空气尘埃在TP上空的空间变化.
主要成果:
- 在TP上空的空气中的尘埃表现出显著的空间变化,主要来自中亚,西亚和南亚的沙漠地区.
- 卡拉库姆,塔克利马坎和塔尔沙漠被确定为西北,东北和西南TP的关键来源.
- 具体的平均质量负荷 (mg m-2) 已为这些来源量化:卡拉库姆 (32.9),塔克利马坎 (48.3) 和塔尔 (32.1).
结论:
- 该研究成功地确定了主要的沙漠来源,这些来源有助于TP的高海拔尘埃.
- 结果强调了邻近的沙漠来源对高海拔雪融的影响在TP的显著差异.
- 开发的算法提供了一种可靠的方法来评估尘埃源对冷层过程的贡献.
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