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qpe > Quantitative Precipitation Estimates (QPE) from the CSAPRVAP Type(s) > Evaluation

Precipitation rates from cloud systems can give a fundamental insight into the processes occurring in-cloud. While rain gauges and disdrometers can give information at a single point, remote sensors such as radars can provide rainfall information over a defined area.

The QPE value-added product (VAP) takes the Corrected Moments in Antenna Coordinates VAP and maps the Rain_rate_A field onto a Cartesian grid at the surface. This field is the rain rate as determined using the specific attenuation (A, dBZ/km) due to two-way liquid attenuation after Ryzhkov et al 2013. Since A is calculated using both differential phase and the integral of reflectivity along the beam path, it naturally combines a measurement sensitive to large and small rain rates as highlighted in a comparison against the Oklahoma Mesonet shown in Figure 1a. Figure 1b shows a single time step highlighting the ability of the algorithm to capture rainfall from both the leading convective line and the trailing stratiform region.

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Content time range 15 April 2011 - 30 September 2011

2013

Sivaraman S. 2013. ARM Climate Research Facility Quarterly Value-Added Product Report January 1–March 31, 2013. Ed. by U.S. Department of Energy, DOE/SC-ARM-13-010.

Mather JH and JW Voyles. 2013. "The ARM Climate Research Facility: A Review of Structure and Capabilities." Bulletin of the American Meteorological Society, 94(3), 10.1175/bams-d-11-00218.1.
Research Highlight

Collis S, S Giangrande, J Helmus, A Theisen, N Bharadwaj, K Widener, M Dunn, and K North. 2013. Value-adding the ARM Precipitation Radars. Presented at 4th Atmospheric System Research (ASR) Science Team Meeting. Potomac, MD.

Theisen A, S Giangrande, S Collis, and A Tokay. 2013. Precipitation Estimation from the ARM Distributed Radar Network During the MC3E Field Campaign. Presented at 4th Atmospheric System Research (ASR) Science Team Meeting. Potomac, MD.

Sivaraman C. 2013. ARM Climate Research Facility Quarterly Value-Added Product Report October 01–December 31, 2012. U.S. Department of Energy. DOE/SC-ARM-13-002.


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