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year 28, Issue 2 (ICOP & ICPET 2022 2022)
ICOP & ICPET _ INPC _ ICOFS 2022, 28(2): 60-63 |
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Jouzdani A, Khalesi fard H, Bayat A. Investigating impacts of dust events in Northwest Iran on atmospheric temperature and radiative forcing using sunphotometer recordings. ICOP & ICPET _ INPC _ ICOFS 2022; 28 (2) :60-63
URL: http://opsi.ir/article-1-2551-en.html
URL: http://opsi.ir/article-1-2551-en.html
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Abstract: (831 Views)
Dust particles affect the atmospheric radiation balance by scattering and absorbing solar radiation at various wavelengths. In Zanjan, a city in northwest Iran, dust is the dominant aerosol during spring and early summer. In this study, we analyzed the impacts of dust on synoptic temperature and the radiative forcing of the atmosphere. High AOD values and low Angstrom exponent (AE) values indicate the presence of coarse particles, such as dust. Dusty days are identified by AOD870nm > 0.35 and AE < 0.5. The Optical properties of dust particles have been evaluated using ground-based sunphotometer Cimel CE-318. By calculating the correlation between AOD, temperature, and ARF, the impacts of dust events on the temperature and radiative forcing can be determined. Results show, the temperature and AOD are negatively correlated (r = -0.21). During a typical dust event and two following days of it, we found that the mean daily temperature drops down 1°C to 3 °C. Additionally, there was a significant correlation between ARF and AOD (r = 0.83).
Type of Study: Experimental |
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