Conference proceedings ; Online: Spatial estimation and impact factors of summer afternoon and evening precipitation under complex terrain
XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
2023
Abstract: Based on hourly observation from 74 meteorological stations in Zhejiang Province in China, the models of ordinary linear regression (OLR) and those considering spatial heterogeneity are adopted to explore the spatial estimation and impact factors of ... ...
Abstract | Based on hourly observation from 74 meteorological stations in Zhejiang Province in China, the models of ordinary linear regression (OLR) and those considering spatial heterogeneity are adopted to explore the spatial estimation and impact factors of regional precipitation in Zhejiang Province in this study. It is found that: (1) The summer afternoon precipitation in Zhejiang Province shows a decreasing trend from southwest to northeast, with two precipitation centers in the south and north, forming a precipitation "wet tongue" of southwest-northeast trend. Afternoon precipitation has a certain influence on the spatial distribution of evening precipitation, which is manifested as the similar spatial distribution patterns and a positive correlation between afternoon precipitation and evening precipitation in most areas. (2) The geographically weighted regression (GWR) model considering spatial heterogeneity, and the geographically neural network weighted regression (GNNWR) model, which uses neural network to consider spatial heterogeneity, are significantly better than the OLR model considering only global relationships, in terms of performance, distribution patterns of error and estimated precipitation. (3) Based on the spatial weight of the impact factors given by the best GNNWR model, geographical, topographic and meteorological factors jointly affect the spatial distribution of summer afternoon and evening precipitation in Zhejiang Province. The airflow convergence of southerly monsoon and easterly sea breeze or the wind blowing from the highlands is the main reason for the precipitation center. Results of this work suggest that the GNNWR model has the value of further application in the field of meteorology. |
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Subject code | 910 |
Language | English |
Publishing country | de |
Document type | Conference proceedings ; Online |
Database | BASE - Bielefeld Academic Search Engine (life sciences selection) |
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