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Open AccessArticle
A High-Precision Sub-Grid Parameterization Scheme for Clear-Sky Direct Solar Radiation in Complex Terrain—Part I: A High-Precision Fast Terrain Occlusion Algorithm
by
Changyi Li
Changyi Li 1,
Wei Wu
Wei Wu 1,*,
Yanan Chen
Yanan Chen 1,
Guili Feng
Guili Feng 1,
Bin Chen
Bin Chen 2,3,4 and
Xiaopei Wen
Xiaopei Wen 1
1
Shandong Institute of Meteorological Sciences, Jinan 250031, China
2
Institute of Carbon Neutrality, Qilu Zhongke, Jinan 251401, China
3
Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing 210044, China
4
Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
*
Author to whom correspondence should be addressed.
Atmosphere 2024, 15(7), 857; https://doi.org/10.3390/atmos15070857 (registering DOI)
Submission received: 31 May 2024
/
Revised: 13 July 2024
/
Accepted: 18 July 2024
/
Published: 19 July 2024
Abstract
In atmospheric modeling, sub-grid parameterization is an important method for studying the topographic effects of solar radiation using high-resolution Digital Elevation Model (DEM) data. For reducing the amount of computation, some approximate methods that can lead to errors are used in existing sub-grid parameterization schemes for clear-sky direct solar radiation (SPS-CSDSR). The lack of a high-precision fast terrain occlusion algorithm (HPFTOA) remains one of the biggest constraints in this field. This study proposed an HPFTOA. It mainly uses two kinds of acceleration algorithms. One method is to use a dynamic, lossless, and fast occlusion search radius. Another way is to use the rectangular grid for calculations within the accuracy of DEM data to avoid coordinate projection conversions. The test results indicate that the HPFTOA can carry out large-scale computation based on DEM data with a resolution of 90 m. Because it rarely uses approximation algorithms and considers the curvature of the Earth, SPS-CSDSR can achieve unprecedented precision. The HPFTOA can also be used in the fields of mountain solar energy assessment, remote sensing, and telemetry, including terrain-obscuring the probe. As computer performance improves and algorithms and execution code are optimized, the application prospects will be very broad.
Share and Cite
MDPI and ACS Style
Li, C.; Wu, W.; Chen, Y.; Feng, G.; Chen, B.; Wen, X.
A High-Precision Sub-Grid Parameterization Scheme for Clear-Sky Direct Solar Radiation in Complex Terrain—Part I: A High-Precision Fast Terrain Occlusion Algorithm. Atmosphere 2024, 15, 857.
https://doi.org/10.3390/atmos15070857
AMA Style
Li C, Wu W, Chen Y, Feng G, Chen B, Wen X.
A High-Precision Sub-Grid Parameterization Scheme for Clear-Sky Direct Solar Radiation in Complex Terrain—Part I: A High-Precision Fast Terrain Occlusion Algorithm. Atmosphere. 2024; 15(7):857.
https://doi.org/10.3390/atmos15070857
Chicago/Turabian Style
Li, Changyi, Wei Wu, Yanan Chen, Guili Feng, Bin Chen, and Xiaopei Wen.
2024. "A High-Precision Sub-Grid Parameterization Scheme for Clear-Sky Direct Solar Radiation in Complex Terrain—Part I: A High-Precision Fast Terrain Occlusion Algorithm" Atmosphere 15, no. 7: 857.
https://doi.org/10.3390/atmos15070857
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