Cold and Arid Research Network of Lanzhou university (phenology camera observation data set of Liancheng Station, 2020)

Cold and Arid Research Network of Lanzhou university (phenology camera observation data set of Liancheng Station, 2020)


The data set contains the phenological camera observation data of Liancheng of the cold and arid area scientific observation network of Lanzhou University in Datong River Basin from March 1, 2020 to December 31, 2020. The longitude and latitude of the observation points are 102.737e, 36.692n and the altitude is 2903m. The data is processed by the software package independently developed by Beijing Normal University. The phenological camera collects data in a downward manner. The shooting data resolution is 2592 * 1944, and the shooting time and frequency can be specified. For the calculation of greenness index phenological period, it is necessary to calculate the relative greenness index according to the region of interest (GCC, green chromatographic coordinate formula is GCC = g / (R + G + b), and R, G and B are the pixel values of red, green and blue channels of the image), then fill in the invalid values and filter and smooth them, and finally determine the key phenological period parameters according to the growth curve fitting, such as the start date, peak End date of growing season, etc; For the coverage, firstly, the data is preprocessed, the image with less strong illumination is selected, and then the image is divided into vegetation and soil. The proportion of vegetation pixels in the calculation area of each image is calculated as the corresponding coverage of the image. After the time series data is extracted, the original coverage data is smoothed and filtered according to the time window specified by the user, The filtered result is the final time series coverage. This data set includes relative greenness index (GCC) and coverage. Due to the built-in clock error of phenological camera, the images before March 1 are taken at night and cannot be used, so the data is missing.


File naming and required software

Year+** observatory network+ site+ Phenomenon


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Cite as:

Zhao, C., Zhang, R. (2021). Cold and Arid Research Network of Lanzhou university (phenology camera observation data set of Liancheng Station, 2020). National Tibetan Plateau Data Center, DOI: 10.11888/Ecolo.tpdc.271610. CSTR: 18406.11.Ecolo.tpdc.271610. (Download the reference: RIS | Bibtex )

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Support Program

Pan-Third Pole Environment Study for a Green Silk Road-A CAS Strategic Priority A Program (No:XDA20000000)

the Strategic Priority Research Program of the Chinese Academy of Sciences (No:XDA20100101) [XDA20100101]

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License: This work is licensed under an Attribution 4.0 International (CC BY 4.0)


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Keywords
Geographic coverage
East: 102.74 West: 102.74
South: 36.69 North: 36.69
Details
  • Temporal resolution: Daily
  • Spatial resolution: -
  • File size: 0.02 MB
  • Views: 300
  • Downloads: 20
  • Access: Open Access
  • Temporal coverage: 2020-03-01 To 2020-12-31
  • Updated time: 2021-07-28
Contacts
: ZHAO Changming   ZHANG Renyi  

Distributor: National Tibetan Plateau Data Center

Email: data@itpcas.ac.cn

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