主办单位:中国气象局沈阳大气环境研究所
国际刊号:ISSN 1673-503X
国内刊号:CN 21-1531/P

Journal of Meteorology and Environment ›› 2022, Vol. 38 ›› Issue (3): 127-136.doi: 10.3969/j.issn.1673-503X.2022.03.015

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Analysis of actinic flux and its influence factors in Yinchuan based on TUV model

Xiao-yu YAN1,2,3(),Yuan-yuan YANG4,Xiao-hui GOU3,*(),Jian-jun LIU1,Zhan-sheng SU3,Bao-guo WU3,Xiao-li GONG3   

  1. 1. Key Laboratory for Meteorological Disaster Monitoring and Early Warning and Risk Management of Characteristic Agriculture in Arid Regions, CMA, Yinchuan 750002, China
    2. Ningxia Key Lab of Meteorological Disaster Prevention and reduction, Yinchuan 750002, China
    3. Ningxia Meteorological Service Center, Yinchuan 750002, China
    4. Yinchuan Meteorological Service, Yinchuan 750002, China
  • Received:2021-06-07 Online:2022-06-28 Published:2022-07-23
  • Contact: Xiao-hui GOU E-mail:yanxy366@126.com;qlzhzhren@126.com

Abstract:

Based on the TUV (tropospheric ultraviolet-visible radiation) model, the variation characteristics of actinic flux in Yinchuan were calculated and analyzed, and the influence of cloud, aerosol, column concentration of ozone, and NO2 on actinic flux was further discussed.The results show that the monthly average actinic flux of Yinchuan from July to September of 2019 was 6.5E+16 quanta·cm-2·s-1, 5.6E+16 quanta·cm-2·s-1, and 4.7E+16 quanta·cm-2·s-1, respectively, with daily maximum appearing at 13:00.The actinic flux rises slowly with the increase of wavelength when the wavelength is less than 325 nm, and it rises rapidly when the wavelength is between 325 nm and 480 nm, whereas it changes slightly with the increase of wavelength when the wavelength is above 480 nm.The variations appear more significantly around noon than in the morning and evening.The attenuation effects of cloud optical thickness and aerosol optical depth on actinic flux have obvious "U"-shaped diurnal characteristics.Comparatively speaking, the "U"-shaped waveform of the attenuation effect of aerosol optical thickness on actinic flux is wider than that of aerosol optical thickness.The decay rate of actinic flux is more sensitive to the changes in lower cloud optical thickness.The variability of actinic flux decreasing with the increase of aerosol optical depth is smaller than that with the increase of cloud optical thickness.Actinic flux is more sensitive to the change of strong scattering aerosol with single scattering albedo greater than 0.6, and the larger the aerosol optical thickness is, the more obvious this characteristic is.The influence of wavelength exponent on actinic flux is relatively small.

Key words: actinic flux, TUV (tropospheric ultraviolet-visible radiation) model, Cloud, Aerosol

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