Article
; Australia
; Australian
; China
; coral
; deglaciation
; East Asian
; glacial period
; Holocene
; ice sheet
; Indian Ocean
; interglacial
; last glacial maximum
; Malaysia
; melting point
; New Zealand
; oscillation
; Papua New Guinea
; sea
; sea level
; sea level rise
; sediment
; Singapore
; surface property
; Thailand
; time
; Viet Nam
; viscosity
; water loading
; flow kinetics
; ice cover
; international cooperation
; sea
; Ice Cover
; Internationality
; Oceans and Seas
; Rheology
; Time Factors
英文摘要:
The major cause of sea-level change during ice ages is the exchange of water between ice and ocean and the planet's dynamic response to the changing surface load. Inversion of ∼1,000 observations for the past 35,000 y from localities far from former ice margins has provided new constraints on the fluctuation of ice volume in this interval. Key results are: (i) a rapid final fall in global sea level of ∼40 m in <2,000 y at the onset of the glacial maximum ∼30,000 y before present (30 ka BP); (ii) a slow fall to -134 m from 29 to 21 ka BP with a maximum grounded ice volume of ∼52 × 106 km3 greater than today; (iii) after an initial short duration rapid rise and a short interval of near-constant sea level, the main phase of deglaciation occurred from ∼16.5 ka BP to ∼8.2 ka BP at an average rate of rise of 12 m·ka-1 punctuated by periods of greater, particularly at 14.5-14.0 ka BP at ≥40 mm·y-1 (MWP-1A), and lesser, from 12.5 to 11.5 ka BP (Younger Dryas), rates; (iv) no evidence for a global MWP-1B event at ∼11.3 ka BP; and (v) a progressive decrease in the rate of rise from 8.2 ka to ∼2.5 ka BP, after which ocean volumes remained nearly constant until the renewed sea-level rise at 100-150 y ago, with no evidence of oscillations exceeding ∼15-20 cm in time intervals ≥200 y from 6 to 0.15 ka BP.
Lambeck, K., Research School of Earth Sciences, Australian National University, Canberra, ACT 0200, Australia, Laboratoire de Géologie de l'École Normale Supérieure, UMR 8538 du CNRS, Paris, 75231, France; Rouby, H., Research School of Earth Sciences, Australian National University, Canberra, ACT 0200, Australia, Laboratoire de Géologie de l'École Normale Supérieure, UMR 8538 du CNRS, Paris, 75231, France; Purcell, A., Research School of Earth Sciences, Australian National University, Canberra, ACT 0200, Australia; Sun, Y., Department of Earth Sciences, University of Hong Kong, Hong Kong, Hong Kong; Sambridge, M., Research School of Earth Sciences, Australian National University, Canberra, ACT 0200, Australia
Recommended Citation:
Lambeck K.,Rouby H.,Purcell A.,et al. Sea level and global ice volumes from the Last Glacial Maximum to the Holocene[J]. Proceedings of the National Academy of Sciences of the United States of America,2014-01-01,111(43)