DOI: 10.1016/j.quascirev.2018.11.024
Scopus记录号: 2-s2.0-85060717691
论文题名: Holocene Indian Ocean sea level, Antarctic melting history and past Tsunami deposits inferred using sea level reconstructions from the Sri Lankan, Southeastern Indian and Maldivian coasts
作者: Yokoyama Y. ; Hirabayashi S. ; Goto K. ; Okuno J. ; Sproson A.D. ; Haraguchi T. ; Ratnayake N. ; Miyairi Y.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2019
卷: 206 起始页码: 150
结束页码: 161
语种: 英语
Scopus关键词: Glaciers
; Ice
; Lakes
; Melting
; Molluscs
; Sediments
; Tsunamis
; Greenland Ice Sheet
; Holocene sea-level change
; Northern indian oceans
; Radiocarbon dating
; Sea level indicators
; Sea-level reconstruction
; Sedimentation rates
; Total organic matter
; Sea level
; coastal lagoon
; glacioisostasy
; historical record
; Holocene
; ice retreat
; melting
; mollusc
; paleoclimate
; paleoenvironment
; polar region
; radiocarbon dating
; reconstruction
; sea level change
; sediment core
; temperature anomaly
; tsunami
; Antarctic Ice Sheet
; Antarctica
; Arctic
; Greenland
; Greenland Ice Sheet
; Indian Ocean
; Maldives
; Sri Lanka
; Mollusca
英文摘要: Holocene sea level change in the northern Indian Ocean was studied using geochemical and geophysical approaches. Molluscs were sub-sampled for radiocarbon dating from sediment cores retrieved from a south Sri Lankan coastal lagoon. They were then combined with previously published sediment core radiocarbon ages from the same lagoon. We observe a ∼20-fold reduction in sedimentation rates at around 4 ka, attributed to a decrease in the rate of sea level rise. Previously reported radiocarbon ages based on total organic matter in the lagoon show remarkable agreement with our new dates suggesting stable and homogeneous sedimentation during the last 8 ka. Comparison of down core age trends of both data sets reveal that sediments are older than coeval molluscs, except for the horizons adjacent to the paleo Tsunami layers, indicating fresh and younger sediments are provided during Tsunami events, which could become a new proxy for identifying paleo Tsunamis. Compilation of previously reported sea level indicators from Sri Lanka, Southeastern India and the Maldives, together with predicted sea level obtained from a glacio-hydro-isostatic adjustment model (GIA), suggest that 3–4 m of global sea level equivalent ice sheet melting occurred during the Mid Holocene due to the retreat of the Antarctic and/or Greenland ice sheets. Previous works suggests late Holocene (ca. 4 ka) climate anomalies in both the low and high latitudes. We suggest the low latitude climate anomaly, transmitted via atmosphere to the high latitude during the late Holocene, seems to have induced changes in polar ice sheets. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/117380
Appears in Collections: 气候变化与战略
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Recommended Citation:
Yokoyama Y.,Hirabayashi S.,Goto K.,et al. Holocene Indian Ocean sea level, Antarctic melting history and past Tsunami deposits inferred using sea level reconstructions from the Sri Lankan, Southeastern Indian and Maldivian coasts[J]. Quaternary Science Reviews,2019-01-01,206