KOPRI Repository

High-resolution climate simulation of the last glacial maximum

Cited 73 time in wos
Cited 69 time in scopus
Metadata Downloads
High-resolution climate simulation of the last glacial maximum
Other Titles
마지막 최대 빙하기의 고해상도 기후 시뮬레이션
Kim, Seong-Joong
David Erickson
Lee, Bang Yong
Phillip B. Duffy
Bala Govindasamy
Thomas J. Crowley
Meteorology & Atmospheric Sciences
NCAR CCM3; high-resolution model; last glacial maximum
Issue Date
Kim, Seong-Joong, et al. 2008. "High-resolution climate simulation of the last glacial maximum". Climate Dynamics, 31(1): 1-16.
The climate of the last glacial maximum (LGM) is simulated with a high-resolution atmospheric general circulation model, the NCAR CCM3 at spectral truncation of T170, corresponding to a grid cell size of roughly 75 km. The purpose of the study was to assess whether there were significant benefits and a better understanding of synoptic-scale systems can be derived from the higher resolution simulation by performing a parallel T42 run. The LGM simulations were forced with modified CLIMAP sea surface temperatures and sea ice distribution, ice sheet topography, reduced CO2, and orbital parameters. The high-resolution model captures modern climate reasonably well, in particular the distribution of heavy precipitation in the tropical Pacific. For the ice age case, surface temperature simulated by the high-resolution model agrees better with those of proxy estimates than that by the low-resolution model. The response of the Asian summer monsoon can be much more clearly linked to local geography in the high-resolution model than in the low-resolution model;this distinction should enable more confident validation of climate proxy data with the high resolution model. Over North America, the upper air ridge-trough pattern is amplified over the ice sheet, leading to poleward heat transport greater than present north of 60°N in the northeastern Pacific. The wave number-one perturbation leads in turn to much colder temperatures over Eurasia. A large part of the Amazon and Congo Basins are simulated to be substantially drier in the ice age ?consistent with many (but not all) paleo data. Tropical cooling on land is also amplified ?again in agreement with paleo data. These results suggest that considerable benefits can be derived from further inspection of regional climate responses in this simulation.
Files in 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

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