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Sea salt sodium record from Talos Dome (East Antarctica) as a potential proxy of the Antarctic past sea ice extent

TitleSea salt sodium record from Talos Dome (East Antarctica) as a potential proxy of the Antarctic past sea ice extent
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2017
AuthorsSeveri, M., Becagli S., Caiazzo Laura, Ciardini Virginia, Colizza E., Giardi F., Mezgec K., Scarchilli Claudio, Stenni B., Thomas E.R., Traversi R., and Udisti R.
KeywordsAntarctic Regions, Antarctic sea ice, antarctica, article, chemistry, climate, Climate change, climate variation, Domes, East Antarctica, Ice core, ice core record, ice cover, Indian Ocean, Linear Models, Meteorology, Pacific Ocean, paleoclimate, proxy climate record, reconstruction, Regional differences, Ross Sea, Sea ice, Sea ice conditions, sea salt, sea water, Seawater, Snow, Sodium, Southern Ocean, spring, statistical model, Talos Dome, Twentieth century, Western Pacific, winter

Antarctic sea ice has shown an increasing trend in recent decades, but with strong regional differences from one sector to another of the Southern Ocean. The Ross Sea and the Indian sectors have seen an increase in sea ice during the satellite era (1979 onwards). Here we present a record of ssNa+ flux in the Talos Dome region during a 25-year period spanning from 1979 to 2003, showing that this marker could be used as a potential proxy for reconstructing the sea ice extent in the Ross Sea and Western Pacific Ocean at least for recent decades. After finding a positive relationship between the maxima in sea ice extent for a 25-year period, we used this relationship in the TALDICE record in order to reconstruct the sea ice conditions over the 20th century. Our tentative reconstruction highlighted a decline in the sea ice extent (SIE) starting in the 1950s and pointed out a higher variability of SIE starting from the 1960s and that the largest sea ice extents of the last century occurred during the 1990s. © 2017 Elsevier Ltd


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Citation KeySeveri2017266