基于TUV模式的银川光化辐射通量特征及其影响因子

doi:10.3969/j.issn.1673-503X.2022.03.015

Abstract

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

CLC Number:

Xiao-yu YAN, Yuan-yuan YANG, Xiao-hui GOU, Jian-jun LIU, Zhan-sheng SU, Bao-guo WU, Xiao-li GONG. Analysis of actinic flux and its influence factors in Yinchuan based on TUV model[J]. Journal of Meteorology and Environment, 2022, 38(3): 127-136.

Figures/Tables 10

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试验	说明
control	无云、无气溶胶、无臭氧、无NO₂晴天条件下光化辐射通量
COD	只考虑COD，COD从10变化至50
AOD	只考虑AOD，AOD从0.5变化至2.5
TOC	只考虑TOC，TOC从250变化至450
NO₂	只考虑NO₂，NO₂从0.3变化至0.9
COD、AOD	同时考虑COD和AOD，COD从10变化至50，AOD从0.5变化至2.5
AOD、SSA	同时考虑AOD和SSA，AOD从0.5变化至2.5，SSA从0.2变化至1.0
AOD、AE	同时考虑AOD和AE，AOD从0.5变化至2.5，AE从0.5变化至1.0

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

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日期	日最大O₃-8h滑动平均值/(μg·m^-3)	PM₁₀/(μg·m^-3)	PM_2.5/(μg·m^-3)	AQI	总云量/(%)	日照时数/h	降水量/mm
7月8日	132	62	22	65	100	0.0	0.1
7月26日	210	42	14	95	6.7	11.8	0.0
8月12日	214	35	16	102	20	12.0	0.0
8月23日	111	27	13	48	100	0.0	0.4
9月2日	180	32	16	80	60	9.5	0.0
9月12日	76	39	20	36	100	0.0	5.8