Surface snow bromide and nitrate at Eureka, Canada in early spring and implications for polar boundary layer chemistry ...
<!--!introduction!--> Surface snow samples were collected daily, at several sites representing distinct environments: sea ice, inland close to sea level, and a hilltop ~600 m above sea level (asl), from a Canadian high Arctic location at Eureka, Nunavut (80°N, 86°W) from the end of February to...
| Main Authors: | , , , , , , , , , |
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| Format: | Conference Object |
| Language: | unknown |
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GFZ German Research Centre for Geosciences
2023
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.57757/iugg23-0571 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016928 |
| Summary: | <!--!introduction!--> Surface snow samples were collected daily, at several sites representing distinct environments: sea ice, inland close to sea level, and a hilltop ~600 m above sea level (asl), from a Canadian high Arctic location at Eureka, Nunavut (80°N, 86°W) from the end of February to the end of March in 2018 and 2019. Snow samples were under ionic and salinity analysis. The aim of this study is to explore the role of snowpack in polar spring boundary layer chemistry, especially as a direct source of reactive bromine (BrO X =BrO+Br) and nitrogen (NO X =NO+NO 2 ). We find that surface snow bromide at sea level is significantly enriched, indicating a net sink of atmospheric bromine. Both surface snow bromide and nitrate at sea level have an increasing trend over the measurement time period. Using these trends, we derive an integrated net deposition flux of bromide of 1.01×10 7 molecules cm -2 s -1 and of nitrate of 2.6×10 8 molecules cm -2 s -1 . In addition, nitrate and bromide in the morning ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ... |
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