AgriMetSoft Formulas in SD-GCM In the SD GCM tool, users have access to three statistical downscaling (SD) methods, which include the following models: 1. The Delta method 2. The Quantile Mapping (QM) method (Panofsky and Briar, 1968) 3. The Empirical...
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AgriMetSoft Formulas in SD-GCM In the SD GCM tool, users have access to three statistical downscaling (SD) methods, which include the following models: 1. The Delta method 2. The Quantile Mapping (QM) method (Panofsky and Briar, 1968) 3. The Empirical Quantile Mapping (EQM) method (Boe et al., 2007) A- Delta Method: The Delta method is a statistical downscaling technique used in climate science and hydrology to estimate local or regional climate variables, such as precipitation or temperature, from the output of global climate models (GCMs) or regional climate models (RCMs). This method is relatively simple and relies on the concept of change or delta between the historical observed climate data and the modeled climate data. Here's a basic description of how the Delta method works: - Calculate the difference or delta between the GCM/RCM model output and the observed historical data for a specific time period (e.g., monthly or annually). http://www.youtube.com/AgriMetSoft
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