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| Citation: | MA Yan, CHEN Shang, LIU Lin. Numerical study of atmospheric circulation over Arctic region at July of 2005[J]. Haiyang Xuebao, 2008, 30(6): 30-38.
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The 48 h mesoscale model simulations from July 17 to 19, 2005 of the atmospheric circulation around Arctic region with the polar MM 5 are presented.The numerical analyses indicate there was a cold, low pressure around the east of the Pole and a warm high pressure at the west of the Pole over the Arctic.At the map of surface, the corresponding systems were a cyclone and an anticyclone circulation.There was a fluctuation mode of high (cyclone)-low (anticyclone)-low(anticyclone)-high (cyclone) over the entire Arctic region.Five upper-air observations from the Arctic are used to verify the simulated atmospheric state for the variables of temperature and wind.The model is found to reproduce the observed atmospheric state based on statistic and vertical analyses.This is evident as smaller model biases and larger correlation coefficients for the variables of temperature and wind.Moreover, the mesoscale model reflects there were evident diurnal cycle for the temperature at height of 2 m, sensible heat and latent heat fluxes at station Barrow; and the inversed temperature and Katabatic vertical structures at Barrow was simulated by the model, effectively.
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