Temporal variability of atmospheric aerosols in Huancayo
DOI:
https://doi.org/10.18259/acs.2014006Keywords:
Temporal variability, atmospheric aerosols, aerosol index, aerosol optical thicknessAbstract
Objectives: To identify the temporal variability of atmospheric aerosols in Huancayo through satellite data. Methods: Descriptive scope research, longitudinal design. The used data were, the aerosol index (AI) taken by the OMI (ozone monitoring instrument) sensor in the 2005-2012 period; and aerosol optical depth (AOD) recorded by the MODIS (moderate resolution imaging spectroradiometer) sensor of Aqua and Terra platforms, in the 2003-2012 and 2001-2012 periods respectively. Results: The AI recorded a year-on-year maximum of 0,61 on 2012; during the january-march period decreased to 0,30; april-august increased to 0,75 and september-december decreased to 0,43. Instead, the EOA reported in 2005 a year-on-year maximum of 0,22; in the april-june period decreased to 0,09; july-september increased to 0,30; October-december decreased to 0,22, and january-march increased to 0,20. The statistical analysis showed a correlation coefficient between the IA from OMI and EOA from MODIS sensor in Aqua and Terra platforms, being 0,1041 and 0,0982 (p < 0,05), respectively. The same correlation was made between the MODIS sensor data, resulting higher 0,902 (p < 0,05). The IA showed a tendency to increase at the rate of 0,036/year; EOA decreased 0,003/year. Conclusions: The significant variation pattern was identified between the seasons and the months of both parameters with high IA values in winter and fall, the highest in august; the EOA in spring and summer, highest in september.
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