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Glacial melting pulses in the Antarctica: Evidence for different responses to regional effects of global warming recorded in Antarctic bivalve shell (Laternula elliptica)

Cited 1 time in wos
Cited 1 time in scopus
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Title
Glacial melting pulses in the Antarctica: Evidence for different responses to regional effects of global warming recorded in Antarctic bivalve shell (Laternula elliptica)
Other Titles
남극의 융빙수 펄스: 남극 이매패류 Laternula elliptica에 기록된 지구 온난화 반응
Authors
Woo, Kyung Sik
Kim, Jin-Kyoung
Lee, Jae Il
Lim, Hyoun Soo
Yoo, Kyu-Cheul
Summerhayes, Colin P.
Ahn, In-Young
Kang, Sung-Ho
Kil, Youngwoo
Subject
Geology; Marine & Freshwater Biology; Oceanography
Keywords
Antarctic bivalve shell; Antarctica; Glacier melting; Global warming; Laternula elliptica; Maxwell Bay
Issue Date
2019-09
Citation
Woo, Kyung Sik, et al. 2019. "Glacial melting pulses in the Antarctica: Evidence for different responses to regional effects of global warming recorded in Antarctic bivalve shell (Laternula elliptica)". JOURNAL OF MARINE SYSTEMS, 197(1): 103179-103187.
Abstract
Meltwater history of the Antarctic bivalve Laternula elliptica in Maxwell Bay, King George Island near the Antarctic Peninsula was reconstructed during the shell growth. High resolution trace elemental and stable isotopic compositions along the aragonite outer part of the shell together with growth bands shows that the shell lived for 9 years with distinct annual cycles. Also oxygen and carbon isotope values reveal the local meltwater history in Antarctic Peninsula region. More negative oxygen isotope values than the predicted equilibrium values clearly show that oxygen isotope depletion is due to lower salinity of seawater by glacial melting. This is also confirmed by the similar trend of low carbon isotope values as well as monitored sea surface salinity values. Comparing δ18O values of previous results using the same bivalve species, more negative values from the Antarctic Peninsula (Maxwell Bay) during the austral winter than from East Antarctica (Syowa Coast and Ross Sea) suggests that perennial glacial melting influenced seawater δ18O composition near the peninsula. Also, more negative and variable bivalve δ18O values during austral summer indicate that meltwater pulses fluctuated greatly in the study area. Distinctively different trends in bivalve δ18O profiles between the Antarctic Peninsula and East Antarctica may reflect differential responses to regional warming with regard to the recent global warming over the past few decades.
URI
https://repository.kopri.re.kr/handle/201206/10973
DOI
http://dx.doi.org/10.1016/j.jmarsys.2019.05.005
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