메뉴 건너뛰기




Volumn 313, Issue 5786, 2006, Pages 492-495

Plio-pleistocene ice volume, antarctic climate, and the global δ18O record

Author keywords

[No Author keywords available]

Indexed keywords

ATMOSPHERIC CHEMISTRY; CLIMATOLOGY; EARTH ATMOSPHERE; OCEAN HABITATS; OCEANOGRAPHY;

EID: 33746602206     PISSN: 00368075     EISSN: 10959203     Source Type: Journal    
DOI: 10.1126/science.1123296     Document Type: Article
Times cited : (361)

References (59)
  • 10
    • 33746643129 scopus 로고    scopus 로고
    • Ph.D. thesis, Massachusetts Institute of Technology, Cambridge, MA available online
    • K. H. Nisancioglu, Ph.D. thesis, Massachusetts Institute of Technology, Cambridge, MA (2004); available online (http://hdl.handle.net/1721.1/16703).
    • (2004)
    • Nisancioglu, K.H.1
  • 23
    • 33746589668 scopus 로고    scopus 로고
    • Fall Meet. Suppl., abstract PP41B-0639
    • J. Junttila, K. Strand, Eos Trans. AGU 86, Fall Meet. Suppl., abstract PP41B-0639 (2005).
    • (2005) Eos Trans. AGU , vol.86
    • Junttila, J.1    Strand, K.2
  • 25
    • 33746610762 scopus 로고    scopus 로고
    • Fall Meet. Suppl., abstract PP51F-04
    • P. G. Quilty, Eos Trans. AGU 86, Fall Meet. Suppl., abstract PP51F-04 (2005).
    • (2005) Eos Trans. AGU , vol.86
    • Quilty, P.G.1
  • 26
    • 84871078108 scopus 로고    scopus 로고
    • A. K. Cooper, P. F. O'Brian, C. Richter, Eds. ch. 1; available online
    • A. K. Cooper, P. E. O'Brien, in Proc. Ocean Drill. Prog. Sci., A. K. Cooper, P. F. O'Brian, C. Richter, Eds. (2004), vol. 188, ch. 1; available online (http://www-odp.tamu.edu/publication/188_SR/synth/synth.htm).
    • (2004) Proc. Ocean Drill. Prog. Sci. , vol.188
    • Cooper, A.K.1    O'Brien, P.E.2
  • 27
    • 33746600876 scopus 로고    scopus 로고
    • Fall Meet. Suppl., abstract PP43C-05
    • R. P. Scherer, Eos Trons. AGU 86, Fall Meet. Suppl., abstract PP43C-05 (2005).
    • (2005) Eos Trons. AGU , vol.86
    • Scherer, R.P.1
  • 30
    • 33746589276 scopus 로고    scopus 로고
    • note
    • 18O records and provide a better modeling target.
  • 31
    • 33746592265 scopus 로고    scopus 로고
    • note
    • 18O from 2.7 to 1.2 Ma is 0.68. Small age model adjustments to the stack, within the range of age model uncertainty (<5 ky), can increase the correlation to 0.75. Both correlation values decrease slightly (to 0.63 and 0.72, respectively) when the full interval of 3 to 1 Ma is used. The stack is detrended by a slope of 0.8‰ per My from 3 to 2.5 Ma and 0.26‰ per My from 2.5 to 1 Ma.
  • 38
    • 33746616660 scopus 로고    scopus 로고
    • note
    • High-resolution studies (36, 37) also reveal that episodes of less notable IRD input occur on millennial time scales (Dansgaard-Oeschger/Heinrich events), events that are believed to reflect solar or stochastically forced instability in the marine ice margin grounded in Hudson Bay [reviewed in (52)]. It may be that successive increments of sea level fall, obliquity-paced in our hypothesis, require the marine-based components of ice sheets to constantly readjust their grounding lines seaward. Millennial-scale interruptions in the delivery of IRD to the open ocean may occur when an ice margin is growing out to a new stable grounding line. When a new grounding line is established, the renewed calving of icebergs would occur, contributing to regional cooling and freshening of ocean surface waters and thus promoting the development of sea ice cover and weakening thermohaline convection. In other words, one need not invoke any millennial-scale forcing but only the slow relentless drive of orbital-scale changes in sea level.
  • 49
    • 33746633551 scopus 로고    scopus 로고
    • note
    • 18O record (53), both precession and obliquity variance are observed. This result is consistent with the presence of ice sheets in only one hemisphere (Antarctica) at that time.
  • 50
    • 33746582512 scopus 로고    scopus 로고
    • note
    • 2 record to get stronger at the mid-Pleistocene transition if high-latitude aridity, as well as ice volume, began to vary in phase. Lastly, if positive climate feedbacks act preferentially on obliquity time scales (54), then the ice volume signal at the 41-ky period could be additionally amplified relative to precession.
  • 52
  • 58
    • 33746587604 scopus 로고    scopus 로고
    • J. Lozan, H. Grabl, P. Hupfer, Eds. GEO Wissenschaftliche Auswertungen, Hamburg
    • P. Huybrechts, in Climate of the 21st Century: Changes and Risks, J. Lozan, H. Grabl, P. Hupfer, Eds. (GEO Wissenschaftliche Auswertungen, Hamburg, 2001), pp. 221-226.
    • (2001) Climate of the 21st Century: Changes and Risks , pp. 221-226
    • Huybrechts, P.1
  • 59
    • 33746636190 scopus 로고    scopus 로고
    • note
    • We thank K. Lawrence, J. Fastook, D. Marchant, B. Ruddiman, P. Huybrechts, J. Kennett, B. Curry, R. Scherer, D. Bowen, P. Huybers, and D. Oppo for assisting us on this project, either by reading the manuscript or providing helpful guidance and information; E. Tziperman for ongoing discussions of Milankovitch and climate; and four anonymous reviewers whose comments greatly improved the manuscript. M.E.R. acknowledges the support of NSF grant ATM-0220681. L.E.L. is supported by a NOAA Climate and Global Change postdoctoral fellowship.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.