KOPRI Repository

Winter and Summer Climate Change in the Last Glacial Maximum Simulated by a Coupled Model

Metadata Downloads
Title
Winter and Summer Climate Change in the Last Glacial Maximum Simulated by a Coupled Model
Other Titles
수치모델을 이용한 지난 최대 빙하기의 겨울과 여름 기후변화 연구
Authors
Kim, Seong-Joong
Keywords
Climate Change; Coupled Model; Last Glacial Maximum; Numerical Simulation
Issue Date
2007
Citation
Kim, Seong-Joong. 2007. Winter and Summer Climate Change in the Last Glacial Maximum Simulated by a Coupled Model. 대한지질학회. 대한지질학회. 2007.04.12~.
Abstract
Boundary conditions of the last glacial maximum (LGM) were implemented in an atmosphere-ocean-sea ice coupled model and a climate response in winter and summer is investigated. Whereas global mean surface air temperature (SAT) decreases in a similar magnitude in both December-January-February (DJF) and June-July August (JJA) by about 10.5℃ with LGM conditions, over land the surface cooling is larger in JJA (16.2℃) than in DJF (15.6℃). The larger SAT reduction in JJA is due to a larger snow-ice albedo feedback, especially over the Laurentide and Fennoscandian ice sheets and Asia. In association with the marked surface cooling, mean sea level pressure (MSLP) substantially increases in high latitudes such as the Laurentide, Fennoscandian, and Antarctic ice sheets in DJF, and over Asia in JJA, whereas MSLP is reduced in the subtropics. The MSLP increases over the Southern Ocean (SO) and the northern North Atlantic associated with an increase in sea ice extent, leading to a reduction in westerly winds, especially in the SO in both seasons. Associated with the change in MSLP, cloud cover tends to decrease in high latitudes and increase in subtropics, and this change is reflected in a change in precipitation fields. In high latitudes, precipitation is largely reduced in both seasons with a larger reduction in JJA, whereas in subtropical regions precipitation slightly increases. In regions of marked surface cooling such as the northern North Atlantic in DJF and over the Laurentide and Fennoscandian ice sheets and Asia in JJA, evaporation decreases substantially even more than precipitation reduction, leading to a wet climate. In conclusion, the climate response is larger in JJA than in DJF to the LGM conditions and this is associated with the larger snow-ice albedo.
URI
http://repository.kopri.re.kr/handle/201206/7683
Conference Name
대한지질학회
Conference Place
대한지질학회
Conference Date
2007.04.12~
Files in This Item
There are no files associated with this item.
General Conditions
      ROMEO Green
    Can archive pre-print and post-print or publisher's version/PDF
      ROMEO Blue
    Can archive post-print (ie final draft post-refereeing) or publisher's version/PDF
      ROMEO Yellow
    Can archive pre-print (ie pre-refereeing)
      ROMEO White
    Archiving not formally supported

    qrcode

    Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

    Browse