Synchronous climate changes in Antarctica and the North Atlantic

Science

Volumn 282, Issue 5386, 1998, Pages 92-95

  Steig, E J ^a,h   Brook, E J ^b   White, J W C ^a   Sucher, C M ^c   Bender, M L ^d   Lehman, S J ^a   Morse, D L ^e   Waddington, E D ^f   Clow, G D ^g  

^a UNIVERSITY OF COLORADO   (United States)

^b WASHINGTON STATE UNIVERSITY   (United States)

^c UNIVERSITY OF RHODE ISLAND   (United States)

^d PRINCETON UNIVERSITY   (United States)

^e UNIVERSITY OF TEXAS AT AUSTIN   (United States)

^f UNIVERSITY OF WASHINGTON   (United States)

^g DENVER FEDERAL CENTER   (United States)

^h UNIVERSITY OF PENNSYLVANIA   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ATMOSPHERE-OCEAN COUPLING; PALEOCLIMATE; QUATERNARY; THERMOHALINE CIRCULATION;

ANTARCTICA; ARTICLE; ATLANTIC ISLANDS; COLD CLIMATE; CORRELATION FUNCTION; GREENLAND; METEOROLOGY; OSCILLATION; PACIFIC OCEAN; PRIORITY JOURNAL; WARMING;

ANTARCTICA; ATLANTIC OCEAN;

EID: 0032475945     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.282.5386.92     Document Type: Article

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53. 2 along the Antarctic coastal margin. Local heat fluxes from leads and polynyas in the western Ross Sea, kept open by the strong westerly katabatic wind flow [D. D. Kurtz and D. Bromwich, ibid., p. 177; H. J. Zwally and J. C. Comiso, ibid., p. 203], may be two orders of magnitude higher [D. J. Cavalieri and S. Martin, ibid., p. 227].
54. 2 along the Antarctic coastal margin. Local heat fluxes from leads and polynyas in the western Ross Sea, kept open by the strong westerly katabatic wind flow [D. D. Kurtz and D. Bromwich, ibid., p. 177; H. J. Zwally and J. C. Comiso, ibid., p. 203], may be two orders of magnitude higher [D. J. Cavalieri and S. Martin, ibid., p. 227].
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59. The sensitivity of Taylor Dome to local oceanographic conditions may depend on ice sheet configuration, especially the position of the Ross Ice Sheet/Ice Shelf margin. Although the Ross Ice Sheet may not have reached all the way to the continental shelf break during the last glacial maximum [K. J. Licht, A. E. Jennings, J. T. Andrews, K. M. Williams, Geology 24, 223 (1996)], the distance between Taylor Dome and seasonally open water would have been greater, and local atmospheric circulation patterns may have been altered [D. L. Morse, E. D. Waddington, E. J. Steig, Geophys. Res. Lett. 25, 3383 (1998)]. We do not therefore expect a simple linear relation between proxies of ocean circulation and Taylor Dome δD even if, as we suggest, changes in ocean circulation are the primary forcing mechanism.
60. The sensitivity of Taylor Dome to local oceanographic conditions may depend on ice sheet configuration, especially the position of the Ross Ice Sheet/Ice Shelf margin. Although the Ross Ice Sheet may not have reached all the way to the continental shelf break during the last glacial maximum [K. J. Licht, A. E. Jennings, J. T. Andrews, K. M. Williams, Geology 24, 223 (1996)], the distance between Taylor Dome and seasonally open water would have been greater, and local atmospheric circulation patterns may have been altered [D. L. Morse, E. D. Waddington, E. J. Steig, Geophys. Res. Lett. 25, 3383 (1998)]. We do not therefore expect a simple linear relation between proxies of ocean circulation and Taylor Dome δD even if, as we suggest, changes in ocean circulation are the primary forcing mechanism.
61. We thank G. Denton and M. Stuiver for suggesting an ice core at Taylor Dome, P. Grootes for directing the field program, the Polar Ice Coring Office and Antarctic Program of NSF for logistical and financial support, and R. Alley and M. Kaplan for helpful comments on the manuscript.