Homogeneous sulfur isotope signature in East Antarctica and implication for sulfur source shifts through the last glacial-interglacial cycle.

ABSTRACT: Sulfate aerosol (SO₄^2-) preserved in Antarctic ice cores is discussed in the light of interactions between marine biological activity and climate since it is mainly sourced from biogenic emissions from the surface ocean and scatters solar radiation during traveling in the atmosphere. However, there has been a paradox between the ice core record and the marine sediment record; the former shows constant non-sea-salt (nss-) SO₄^2- flux throughout the glacial-interglacial changes, and the latter shows a decrease in biogenic productivity during glacial periods compared to interglacial periods. Here, by ensuring the homogeneity of sulfur isotopic compositions of atmospheric nss-SO₄^2- (δ³⁴S_nss) over East Antarc

SUBMITTER: Ishino S 

PROVIDER: S-EPMC6711983 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature