Rhee, Hyun Hee Seong, Yeong Bae Lee, Min Kyung Jeong, Ara Dash, Chinmay Lee, Jae Il Yoo, Kyu-Cheul Yu, Byung Yong 2024-01-19T11:32:38Z 2024-01-19T11:32:38Z 2022-06-02 2022-08 1226-4806 https://pubs.kist.re.kr/handle/201004/114845 This study documents spatial variations in authigenic Be-9 and Be-10 concentrations and Be-10/Be-9 ratios in different glacial settings in the Weddell and Ross seas, Antarctica. Weddell Sea surface sediments have the lowest Be-10 and highest Be-9 concentrations, and most depleted Be-10/Be-9 ratios, as compared with other regions, indicating Be-9 enrichment from the recently collapsed Larsen Ice Shelf (LIS) B and reduction of Be-10 supply due to blockage by the un-deglaciated LIS C. Local Be-10 deposition varies across the open marine Ross Sea, which is more affected by seasonal sea ice persistence than ocean currents. Higher Be-10/Be-9 ratios in the western Ross Sea and higher Be-10 concentrations in the eastern Ross Sea correlate with higher sea ice concentrations and changes, and vice versa in the central Ross Sea. The higher sea ice concentration not only blocks atmospheric Be-10 and dust deposition during the frozen season, but increases the dust flux and supply of Be isotopes during the sea ice melting season. Thus, the spatial distribution of Be isotopes in surface sediments of the Antarctic oceans can be used as a proxy for sea ice dynamics and sedimentary environments. English 한국지질과학협의회 Spatial variations of authigenic beryllium isotopes in surface sediments of the Antarctic oceans: a proxy for sea ice dynamics and sedimentary environments Article 10.1007/s12303-022-0003-4 1 Geosciences Journal, v.26, no.4, pp.455 - 467 Geosciences Journal 26 4 455 467 N scie scopus kci ART002864883 000796812200002 Geosciences, Multidisciplinary Geology Article WEDDELL SEA BE-10/BE-9 RATIOS ATLANTIC SECTOR ROSS SEA SHELF COLLAPSE FLUXES WATERS CYCLE Antarctica cosmogenic Be-10 sea ice oceanic sedimentation local contamination offset