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- W3175280574 abstract "<p>It is important to understand the magnitude and rate of past sea ice changes, as well as their timing relative to abrupt shifts in other components of Earth&#8217;s climate system. Furthermore, records of past sea ice over the last few centuries are urgently needed to assess the scale of natural (internal) variability over decadal timescales. By continuously recording past atmospheric composition, polar ice cores have the potential to document changing sea ice conditions if atmospheric chemistry is altered.&#160; Sea salt aerosol, specifically sodium (Na), and bromine enrichment (Br<sub>enr</sub>, Br/Na enriched relative to seawater ratio) are two ice core sea ice proxies suggested following this premise.</p><p>Here we aim to move beyond a conceptual understanding of the controls on Na and Br<sub>enr</sub> in ice cores by using process-based modelling to test hypotheses. We present results of experiments using a 3D global chemical transport model (p-TOMCAT) that represents marine aerosol emission, transport and deposition. Critically, the complex atmospheric chemistry of bromine is also included allowing us to explore the partitioning of Br between gas and aerosol phases. &#160;</p>" @default.
- W3175280574 created "2021-07-05" @default.
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- W3175280574 date "2021-03-04" @default.
- W3175280574 modified "2023-09-27" @default.
- W3175280574 title "Exploring ice core sea ice proxies through process-based modelling" @default.
- W3175280574 doi "https://doi.org/10.5194/egusphere-egu21-16037" @default.
- W3175280574 hasPublicationYear "2021" @default.
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