Sea ice as a source of sea salt aerosol to Greenland ice cores: a model-based study

摘要: Abstract. Growing evidence suggests that the sea ice surface is an important source of salt aerosol and this has significant implications for polar climate atmospheric chemistry. It also potential to use core records as proxies past extent. To explore possibility in Arctic region, we a chemical transport model track emission, transport, deposition from both open ocean ice, allowing us assess relative importance each. Our results confirm (SISS) winter burden. For first time, explicitly simulate concentrations Greenland snow, achieving values within factor two records. simulations suggest SISS contributes maxima characteristic cores across Greenland. However, north–south gradient contribution open-ocean (OOSS) exists Greenland, with 50 % being at northern sites such NEEM (77° N), while only 10 % southern locations ACT10C (66° N). shows some skill reproducing inter-annual variability 1991–1999, particularly Summit where up 62 % explained. Future work will involve constraining what driving operating under different palaeoclimatic conditions.