珠穆朗玛峰北坡桤木属大气花粉传输路径与来源
收稿日期: 2024-02-26
修回日期: 2024-03-15
网络出版日期: 2024-04-26
基金资助
第二次青藏高原综合科学考察研究项目(2019QZKK0202);国家自然科学基金项目(41831177)
Transport Pathways and Source Areas of Airborne Alnus Pollen on the Northern Slope of the Mt. Qomolangma Region
Received date: 2024-02-26
Revised date: 2024-03-15
Online published: 2024-04-26
Supported by
the Second Tibetan Plateau Scientific Expedition and Research Program(2019QZKK0202);The National Natural Science Foundation of China(41831177)
认识区域大气花粉组成及其形成条件有利于明确不同类型花粉组合的气候与环境意义。利用布卡大气花粉采样器在珠穆朗玛峰北坡开展了连续2年(2012—2013年)的大气花粉观测研究。基于后向轨迹和潜在来源区域模型,探讨了秋季主要组分桤木属花粉的传输路径与潜在来源区域,分析了桤木属花粉与其植物分布和大气环流的关系及气候指示意义。结果显示:
程久菊 , 吕新苗 , 朱立平 , 马庆峰 , SIMA HUMAGAIN , KHUM PAUDAYAL N . 珠穆朗玛峰北坡桤木属大气花粉传输路径与来源[J]. 地球科学进展, 2024 , 39(4) : 419 -428 . DOI: 10.11867/j.issn.1001-8166.2024.023
Understanding the composition and formation conditions of regional airborne pollen is essential for elucidating the environmental significance of different pollen assemblages. A Burkard pollen trap was utilized to monitor airborne pollen on the northern slope of Mount Qomolangma over two consecutive years (2012 and 2013). Utilizing backward air mass trajectory analysis and source receptor models, this study delved into the pathways and potential sources of Alnus pollen, the predominant component during autumn. The analysis also explored the relationships between Alnus pollen, plant distribution, atmospheric circulation, and its environmental implications. The study yielded three main findings: Firstly, the predominant air mass transport pathway during the Alnus pollen season originated predominantly from the southwest of the sampling site. Secondly, the potential source area of Alnus pollen was primarily situated in the middle Himalayan region, encompassing central, eastern, and southern Nepal Tibet, largely aligning with the principal air mass transport pathway. Thirdly, interannual variations in Alnus pollen quantity, transport pathways, and potential source areas may be linked to atmospheric circulation patterns. Specifically, the southwest air mass, influenced by the upper westerlies, exhibited a more pronounced impact on Alnus pollen dispersion. These findings offer foundational insights into the climatic significance of exotic pollen on the northern slope of Mount Qomolangma.
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