主办单位:中国气象局沈阳大气环境研究所
国际刊号:ISSN 1673-503X
国内刊号:CN 21-1531/P

Journal of Meteorology and Environment ›› 2022, Vol. 38 ›› Issue (4): 57-66.doi: 10.3969/j.issn.1673-503X.2022.04.007

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Comparison of spatial interpolation methods of meteorological elements over Chongqing mountainous region

Chun-hua YANG1(),Li ZHENG1,He-qing HUANG1,Bo LEI1,Shuo YANG2,Jian-hui LIU1,Ming-yang ZHANG3,*(),Qiu-yan DUAN4   

  1. 1. Chongqing Institute of Eco-Environmental Science, Chongqing 401147, China
    2. Chongqing No.8 Secondary School, Chongqing 400030, China
    3. Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
    4. Ecological Environment Monitoring Station in Yubei District of Chongqing, Chongqing 401120, China
  • Received:2021-07-12 Online:2022-08-28 Published:2022-09-22
  • Contact: Ming-yang ZHANG E-mail:10427936@qq.com;120949026@qq.com

Abstract:

Mountainous terrain is one typical and complex land surface, and the accurate simulation and acquisition of meteorological elements over mountainous regions are facing challenges due to a limited number of meteorological stations. Based on the meteorological data over the studied area in 1999 and 2018, we used four methods of thin-plate smoothing splines (ANUS), Co-Kriging (CK), ordinary Kriging (OK), and inverse distance weighting (IDW) to spatially interpolate air temperature, precipitation, and total solar radiation on annual and monthly scales. Using a cross-validation method, mean absolute error (MAE), magnitude of relative error (MRE), and root mean square error (RMSE) are used to evaluate the interpolation accuracy and determine the optimal interpolation method for each meteorological element. The results showed that ANUS is the optimal interpolation method for air temperature and total solar radiation, while IDW is the optimal interpolation method for precipitation. The interpolation accuracy for air temperature and total solar radiation is better during the months with high air temperature and total solar radiation than that during months with their low values, and the trend is opposite for the precipitation. The interpolation accuracy for the three elements is better on an annual scale than on a monthly scale. The MRE values showed that the interpolation accuracy for the three elements is in order of air temperature > total solar radiation > precipitation, being 1.86%, 4.6%, and 6.87% on an annual scale in 1999 and being 2.79%, 5.82%, and 17.42% on a monthly scale, respectively. In 2018, the interpolation accuracy for total solar radiation is 3.03% and 4.88% on the annual and monthly scales, respectively. After using data at regional encryption stations, the interpolation accuracy for air temperature and precipitation can reach 2.03% and 11.2% on the annual scale and 3.2% and 23.14% on the monthly scale, respectively. Our research can provide scientific reference and a basis for the spatialization of meteorological elements in similar complex terrain areas.

Key words: Spatial interpolation, Meteorological elements, Cross-validation

CLC Number: