From trees to rain: Enhancement of cloud glaciation and precipitation by pollen
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arXiv
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| Format: | Preprint |
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2023
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| _version_ | 1866910398630854656 |
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| author | Kretzschmar, Jan Pöhlker, Mira Stratmann, Frank Wex, Heike Wirth, Christian Quaas, Johannes |
| author_facet | Kretzschmar, Jan Pöhlker, Mira Stratmann, Frank Wex, Heike Wirth, Christian Quaas, Johannes |
| contents | The ability of pollen to enable the glaciation of supercooled liquid water has been demonstrated in laboratory studies; however, the potential large-scale effect of trees and pollen on clouds, precipitation and climate is pressing knowledge to better understand and project clouds in the current and future climate. Combining ground-based measurements of pollen concentrations and satellite observations of cloud properties within the United States, we show that enhanced pollen concentrations during springtime lead to a higher cloud ice fraction. We further establish the link from the pollen-induced increase in cloud ice to a higher precipitation frequency. In light of anthropogenic climate change, the extended and strengthened pollen season and future alterations in biodiversity can introduce a localized climate forcing and a modification of the precipitation frequency and intensity. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2305_06758 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | From trees to rain: Enhancement of cloud glaciation and precipitation by pollen Kretzschmar, Jan Pöhlker, Mira Stratmann, Frank Wex, Heike Wirth, Christian Quaas, Johannes Atmospheric and Oceanic Physics The ability of pollen to enable the glaciation of supercooled liquid water has been demonstrated in laboratory studies; however, the potential large-scale effect of trees and pollen on clouds, precipitation and climate is pressing knowledge to better understand and project clouds in the current and future climate. Combining ground-based measurements of pollen concentrations and satellite observations of cloud properties within the United States, we show that enhanced pollen concentrations during springtime lead to a higher cloud ice fraction. We further establish the link from the pollen-induced increase in cloud ice to a higher precipitation frequency. In light of anthropogenic climate change, the extended and strengthened pollen season and future alterations in biodiversity can introduce a localized climate forcing and a modification of the precipitation frequency and intensity. |
| title | From trees to rain: Enhancement of cloud glaciation and precipitation by pollen |
| topic | Atmospheric and Oceanic Physics |
| url | https://arxiv.org/abs/2305.06758 |