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DOE OSTI · 1238059

Surface Cloud Grid Version 2 (SFCCLDGRID2) Value-Added Product: Description of Update"

Riihimaki, Laura·Gaustad, Krista
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Abstract

This document describes the algorithm used for the Surface Cloud Grid Value-Added Product (VAP). This VAP uses as input the 15-min. output from the Shortwave (SW) Flux Analysis VAP (see Long 2001; Long and Ackerman 2000; Long et al. 1999) from the Atmospheric Radiation Measurement (ARM) Climate Reseach Facility (ACRF) Southern Great Plains (SGP) Central Facility and extended facilities. This network of 21 sites is unevenly spaced over northern Oklahoma into southern Kansas, covering an area from 95.5° to 99.5° west longitude and 34.5° to 38.5° north latitude. For research applications such as single-column modeling, an estimate of the cloud and cloud effects distribution over this entire domain is desirable. The Surface Cloud Grid VAP applies a multi-pass weighted sum analytic approximation technique (Caracena 1987), which uses Gaussian weighting and an imposed scale length, to interpolate to a 0.25° by 0.25° lat/long grid over the SGP domain. The output, like the input, includes solar elevation angles of 10° or greater.

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Riihimaki, Laura, Gaustad, Krista. 2020-03-01. Surface Cloud Grid Version 2 (SFCCLDGRID2) Value-Added Product: Description of Update". https://doi.org/10.2172/1238059

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