• Alados-Arboledas, L., F. J. Olmo, I. Alados, and M. Perez, 2000: Parametric models to estimate photosynthetically active radiation in Spain. Agric. For. Meteor., 101, 187201.

    • Search Google Scholar
    • Export Citation
  • Augustine, J. A., J. J. DeLuisi, and C. N. Long, 2000: SURFRAD—A national surface radiation budget network for atmospheric research. Bull. Amer. Meteor. Soc., 81, 23412358.

    • Search Google Scholar
    • Export Citation
  • Escobedo, J. F., E. N. Gomes, A. P. Oliveira, and J. Soares, 2009: Modeling hourly and daily fractions of UV, PAR and NIR to global solar radiation under various sky conditions at Botucatu, Brazil. Appl. Energy, 86, 299309.

    • Search Google Scholar
    • Export Citation
  • Frolking, S. E., and Coauthors, 1998: Relationship between ecosystem productivity and photosynthetically active radiation for northern peatlands. Global Biogeochem. Cycles, 12, 115126.

    • Search Google Scholar
    • Export Citation
  • Gueymard, C., 1989a: An atmospheric transmittance model for the calculation of the clear sky beam, diffuse and global photosynthetically active radiation. Agric. For. Meteor., 45, 215229.

    • Search Google Scholar
    • Export Citation
  • Gueymard, C., 1989b: A two-band model for the calculation of clear sky solar irradiance, illuminance, and photosynthetically active radiation at the earth’s surface. Sol. Energy, 43, 253265.

    • Search Google Scholar
    • Export Citation
  • Hay, J. E., 1979: Calculation of monthly mean solar radiation for horizontal and inclined surfaces. Sol. Energy, 23, 301307.

  • Jacovides, C. P., F. S. Tymvios, D. N. Asimakopoulos, K. M. Theofilou, and S. Pashiardes, 2003: Global photosynthetically active radiation and its relationship with global solar radiation in the eastern Mediterranean basin. Theor. Appl. Climatol., 74, 227233.

    • Search Google Scholar
    • Export Citation
  • Justus, C. G., and M. V. Paris, 1985: A model for solar spectral irradiance and radiance at the bottom and top of a cloudless atmosphere. J. Climate Appl. Meteor., 24, 193205.

    • Search Google Scholar
    • Export Citation
  • Knyazikhin, Y., J. V. Martonchik, R. B. Myneni, D. J. Diner, and S. W. Running, 1998: Synergistic algorithm for estimating vegetation canopy leaf area index and fraction of absorbed photosynthetically active radiation from MODIS and MISR data. J. Geophys. Res., 103, 32 25732 276.

    • Search Google Scholar
    • Export Citation
  • Leckner, B., 1978: The spectral distribution of solar radiation at the earth’s surface—Elements of a model. Sol. Energy, 20, 143150.

    • Search Google Scholar
    • Export Citation
  • Liang, S., T. Zheng, R. Liu, H. Fang, S.-C. Tsay, and S. Running, 2006: Estimation of incident photosynthetically active radiation from Moderate Resolution Imaging Spectrometer data. J. Geophys. Res., 111, D15208, doi:10.1029/2005JD006730.

    • Search Google Scholar
    • Export Citation
  • McCree, K. J., 1972: Test of current definitions of photosynthetically active radiation against leaf photosynthesis data. Agric. Meteor., 10, 443453.

    • Search Google Scholar
    • Export Citation
  • Menges, H. O., C. Ertekin, and M. H. Sonmete, 2006: Evaluation of global solar radiation models for Konya, Turkey. Energy Convers. Manage., 47, 31493173.

    • Search Google Scholar
    • Export Citation
  • Pinker, R. T., and I. Laszlo, 1992: Modeling surface solar irradiance for satellite applications on a global scale. J. Appl. Meteor., 31, 194211.

    • Search Google Scholar
    • Export Citation
  • Ross, J., and M. Sulev, 2000: Sources of errors in measurements of PAR. Agric. For. Meteor., 100, 103125.

  • Sivakumar, M. V. K., and S. M. Virmani, 1984: Crop productivity in relation to interception of photosynthetically active radiation. Agric. For. Meteor., 31, 131141.

    • Search Google Scholar
    • Export Citation
  • Udo, S. O., and T. O. Aro, 2000: New empirical relationships for determining global PAR from measurements of global solar radiation, infrared radiation or sunshine duration. Int. J. Climatol., 20, 12651274.

    • Search Google Scholar
    • Export Citation
  • Wan, K. K. W., H. L. Tang, L. Yang, and J. C. Lam, 2008: An analysis of thermal and solar zone radiation models using an Ångström–Prescott equation and artificial neural networks. Energy, 33, 11151127.

    • Search Google Scholar
    • Export Citation
  • Wang, D., S. Liang, R. Liu, and T. Zheng, 2010: Estimation of daily-integrated PAR from sparse satellite observations: Comparison of temporal scaling methods. Int. J. Remote Sens., 31, 16611677.

    • Search Google Scholar
    • Export Citation
  • WMO, 2008: Measurement of sunshine duration. Guide to Meteorological Instruments and Methods of Observation, World Meteorological Organization, I.8-1–I.8-11. [Available online at http://www.wmo.int/pages/prog/www/IMOP/publications/CIMO-Guide/CIMO%20Guide%207th%20Edition,%202008/Part%20I/Chapter%208.pdf.]

    • Search Google Scholar
    • Export Citation
  • Yang, K., T. Koike, and B. Ye, 2006: Improving estimation of hourly, daily, and monthly solar radiation by importing global data sets. Agric. For. Meteor., 137, 4355.

    • Search Google Scholar
    • Export Citation
  • Yang, K., T. Koike, G. Huang, and N. Tamai, 2007: Development and validation of an advanced model for estimating solar radiation from surface meteorological data. Recent Developments in Solar Energy, T. P. Hough, Ed., Nova Science, 1–53.

    • Search Google Scholar
    • Export Citation
  • Zheng, T., S. Liang, and K. Wang, 2008: Estimation of incident photosynthetically active radiation from GOES visible imagery. J. Appl. Meteor. Climatol., 47, 853868.

    • Search Google Scholar
    • Export Citation
All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 442 304 3
PDF Downloads 363 257 1

Estimation of Daily Mean Photosynthetically Active Radiation under All-Sky Conditions Based on Relative Sunshine Data

View More View Less
  • 1 Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China
  • | 2 Department of Geography, University of Maryland, College Park, College Park, Maryland, and College of Global Change and Earth System Science, Beijing Normal University, Beijing, China
  • | 3 Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, and Graduate School of the Chinese Academy of Sciences, Beijing, China
Restricted access

Abstract

Photosynthetically active radiation (PAR) is absorbed by plants to carry out photosynthesis. Its estimation is important for many applications such as ecological modeling. In this study, a broadband transmittance scheme for solar radiation at the PAR band is developed to estimate clear-sky PAR values. The influence of clouds is subsequently taken into account through sunshine-duration data. This scheme is examined without local calibration against the observed PAR values under both clear- and cloudy-sky conditions at seven widely distributed Surface Radiation Budget Network (SURFRAD) stations. The results indicate that the scheme can estimate the daily mean PAR at these seven stations under all-sky conditions with root-mean-square error and mean bias error values ranging from 6.03 to 6.83 W m−2 and from −2.86 to 1.03 W m−2, respectively. Further analyses indicate that the scheme can estimate PAR values well with globally available aerosol and ozone datasets. This suggests that the scheme can be applied to regions for which observed aerosol and ozone data are not available.

Corresponding author address: Jun Qin, Institute of Tibetan Plateau Research, Chinese Academy of Sciences 1, Laboratory of Tibetan Environment Changes and Land Surface Processes, No. 18, Shuangqing Road, Haidian District, Beijing 100875, China. E-mail: shuairenqin@gmail.com

Abstract

Photosynthetically active radiation (PAR) is absorbed by plants to carry out photosynthesis. Its estimation is important for many applications such as ecological modeling. In this study, a broadband transmittance scheme for solar radiation at the PAR band is developed to estimate clear-sky PAR values. The influence of clouds is subsequently taken into account through sunshine-duration data. This scheme is examined without local calibration against the observed PAR values under both clear- and cloudy-sky conditions at seven widely distributed Surface Radiation Budget Network (SURFRAD) stations. The results indicate that the scheme can estimate the daily mean PAR at these seven stations under all-sky conditions with root-mean-square error and mean bias error values ranging from 6.03 to 6.83 W m−2 and from −2.86 to 1.03 W m−2, respectively. Further analyses indicate that the scheme can estimate PAR values well with globally available aerosol and ozone datasets. This suggests that the scheme can be applied to regions for which observed aerosol and ozone data are not available.

Corresponding author address: Jun Qin, Institute of Tibetan Plateau Research, Chinese Academy of Sciences 1, Laboratory of Tibetan Environment Changes and Land Surface Processes, No. 18, Shuangqing Road, Haidian District, Beijing 100875, China. E-mail: shuairenqin@gmail.com
Save