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Estimation of kilometer-scale heat fluxes over a hilly area in Northern China using an optical-microwave scintillometer

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  • Zhang, Gong
  • Zhang, Jinsong
  • Meng, Ping

Abstract

Both sensible and latent heat fluxes are important components in the land surface energy budget, and accurately estimating them on kilometer-scale are important for understanding and modeling local hydro meteorological process. Scintillometry could provide kilometer-scale averaged turbulent heat fluxes, and has been used as ground-based remote sensing for estimating surface energy and water budget. This research compared heat fluxes obtained using an optical-microwave scintillometer (OMS) and an eddy covariance system (EC) over a typical temperate deciduous forest in hilly area, northern China. The observation period mainly represents growing season, from April to October 2018. We estimated the sensible and latent heat fluxes using both the two-wavelength method and the bichromatic correlation method, and the EC measurements were used as a benchmark. The results show the sensible heat fluxes from OMS showed 2% higher than EC, whilst the latent heat fluxes from OMS showed around 10% higher than EC. Changes in hydrological conditions or footprints have no significant effects on the measured turbulent fluxes from OMS. We also founded that there are slightly differences between fluxes derived by the two-wavelength method and the bichromatic correlation method due to assumed rTq value. Based on these results, we conclude that OMS can be a reliable approach to measure kilometer-scale surface turbulent heat fluxes over the hilly area, and its ability to estimate kilometer-area sensible and latent heat fluxes looks promising.

Suggested Citation

  • Zhang, Gong & Zhang, Jinsong & Meng, Ping, 2021. "Estimation of kilometer-scale heat fluxes over a hilly area in Northern China using an optical-microwave scintillometer," Agricultural Water Management, Elsevier, vol. 244(C).
    • Handle: RePEc:eee:agiwat:v:244:y:2021:i:c:s0378377420321296
    DOI: 10.1016/j.agwat.2020.106582
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    Cited by:

    1. Mengyao Zhu & Dandan Liu & Weichao Tang & Qian Chi & Xiao Zhao & Siqi Xu & Siyu Ye & Yaobin Wang & Yaoping Cui & Shenghui Zhou, 2022. "Exploring the Ecological Climate Effects Based on Five Land Use Types: A Case Study of the Huang-Huai-Hai River Basin in China," Land, MDPI, vol. 11(2), pages 1-18, February.
    2. Qian Chi & Shenghui Zhou & Lijun Wang & Mengyao Zhu & Dandan Liu & Weichao Tang & Yaoping Cui & Jay Lee, 2021. "Exploring on the Eco-Climatic Effects of Land Use Changes in the Influence Area of the Yellow River Basin from 2000 to 2015," Land, MDPI, vol. 10(6), pages 1-16, June.

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