Chinese Journal of Agrometeorology ›› 2017, Vol. 38 ›› Issue (07): 426-434.doi: 10.3969/j.issn.1000-6362.2017.07.004

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Determination of Saturation Lines of ZZLAS-Type Scintillometer

ZHANG Gong , ZHANG Jin-song , SHI Sheng-jin , MENG Ping , Huang Bing-xiang ,ZHENG Ning , LI Yan-lei , CAI Qi-xiang   

  1. 1. Key Laboratory of Tree Breeding and Cultivation of State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091,China;2.Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037;3.College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100093
  • Received:2016-11-24 Online:2017-07-20 Published:2017-07-14

Abstract: Scintillometers were used to precisely measure heat fluxes quickly at a regional scale, and the ZZLAS-type scintillometer made in China possess a wide prospect of application in China due to its accurate measurements, convenient operation and lower price. For the purpose of improving the accuracy of ZZLAS-type scintillometer measurement and promote its application in the field of heat fluxes. This paper set BLS900 as a basement, and chose ZZLAS-type scintillometer with 0.15m and 0.075m apertures for the saturation lines observations under grassland with flat and uniform surface from August to September 2014. From September to October 2014, the ZZLAS-type scintillometers with aperture of 0.15m and 0.075m were used to test the obtained saturation lines with a complex farmland surface. The results revealed that the strong saturation line was 0.359 and the weak saturation line was 0.099. With these lines, the ZZLAS-type scintillometer with 0.075m aperture showed the highest saturation rate of 24.58%. Results showed that the obtained saturation lines could be used as a reference for the saturation judgment of the ZZLAS-type scintillometer; with the lines most saturation phenomenon of the ZZLAS-type scintillometer is slightly saturated and can be corrected through mathematical methods.

Key words: Sensible heat flux, Evapotranspiration, Regional area, Turbulence intensity