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KMID : 1024520120210020189
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Journal of the Environmental Sciences
2012 Volume.21 No. 2 p.189 ~ p.202
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Spatial and Temporal Features of PM10 Evolution Cycle in the Korean Peninsula
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Jang Jae-Hoon
Lee Hwa-Woon
Lee Soon-Hwan
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Abstract
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Power spectral analysis for PM 10 observed at 10 cities in the Korean Peninsula from 2004 to 2010 was carried out to examine the spatial and temporal features of PM 10 evolution cycle. The power spectrum analysis proposed 9 typical cycles (0.5 day, 1day, 5.4day, 8~10day, 19~21day, 26day, 56day, 180day and 365day) for PM 10 evolution and the cycles are strongly associated with dilution and transportation due to the meterological influence. The spectrum intensity of 5.4day and 26day PM 10 evolution cycles mainly depend on the advection cycles of synoptic pressures system and long-term variation of climatological forcing, respectively.
The intensity of PM 10 evolution with longer temporal cycles than one day tends to be stronger in La nina period in comparison with that in El nino period. Mean of typical intensity of PM 10 evolution in La nina period estimated to be 30% larger than El nino period. Thus the global scale meteorological phenomena such as El nino and La nina also can influence the variation of wind system in the Korean Peninsula and PM 10 evolution. but global scale forcing tends to influence different manner for PM 10 evolution in accordance with its temporal cycles.
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KEYWORD
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Power spectral analysis, PM 10 concentration, Wind, Evolution cycle, Climate condition
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