基于实测数据的辽宁沿海区域暗夜环境评估研究OA

With the continuous intensification of urban construction and port development activities in coastal areas,the impact of artificial light at night on the ecological environment has become increasingly prominent.Taking the coastal area of Yingkou City,Liaoning Province as the research object,this paper evaluates the characteristics of the regional dark-sky environment based on field measurement data.By establishing field measurement points,data including sky magnitude brightness,luminance,illuminance,and spectra under different observation window conditions were acquired.Combined with zenith light attenuation and disturbance distribution,the nighttime light environment of the coastal area of Yingkou City-a vital coastal city in Liaoning with a complete coastline—was analyzed.According to the analysis results,the nighttime light environment in the coastal area of Yingkou City exhibits significant directional variations and spatial heterogeneity.Both luminance and illuminance are higher toward the urban direction than toward the sea direction,whereas the sky magnitude brightness shows exactly the opposite trend.Therefore,the luminous intensity of artificial light sources determines the degree of light disturbance to the coastal environment.Spectral analysis shows that differences exist in the nighttime light components across different measurement points,reflecting the complexity of nighttime light source types in the coastal region.Zenith light disturbance analysis indicates that areas with a zenith night-sky brightness value below 17 mag/arcsec2 only exist in the 70° and 80° directions,and one-fourth of the coastline sky is affected by artificial light pollution.Based on the field measurement data,this paper systematically evaluates the current status of the dark-sky environment in the coastal area of Yingkou City,which can provide a reference for dark-sky environmental protection evaluation,nighttime lighting optimization,and light pollution monitoring in coastal regions.