An objective nowcasting tool that optimizes the impact of satellite derive sounder products in very short range forecasts

Ralph Petersen; Robert Aune

doi:10.1117/12.683822

1 September 2006 An objective nowcasting tool that optimizes the impact of satellite derive sounder products in very-short-range forecasts

Ralph Petersen, Robert Aune

Author Affiliations +

Proceedings Volume 6301, Atmospheric and Environmental Remote Sensing Data Processing and Utilization II: Perspective on Calibration/Validation Initiatives and Strategies; 63010G (2006) https://doi.org/10.1117/12.683822
Event: SPIE Optics + Photonics, 2006, San Diego, California, United States

Abstract

Future instruments will improve atmospheric measurements in both time and space. Although these data are expected to advance traditional Numerical Weather Prediction (NWP) guidance at 48 hours and beyond, greater benefit may come from objective nowcasting systems that assist forecasters in identifying rapidly developing and isolated extreme weather events a few hours in advance. These systems should detect and retain extreme variations in the atmosphere and incorporate large volumes of high-resolution asynoptic data. Because they need to be extremely fast, they may use numerical approaches different from current NWP. A new objective nowcasting approach is presented that uses trajectories to optimize the impact and retention of satellite information. It is designed to detect and preserve intense vertical and horizontal variations observed over time. Real data tests have identified atmospheric details associated with the onset of significant weather events up to 6 hours in advance. Using full resolution moisture products from current GOES sounders to update and enhance current operational forecasts, the Lagrangian system captures and retains details (maxima, minima and extreme gradients) important to the development of convective instability, even after IR observations are no longer available due to cloud development. Examples of the issues and impact of using hyperspectral AIRS data are also discussed.

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Ralph Petersen and Robert Aune "An objective nowcasting tool that optimizes the impact of satellite derive sounder products in very-short-range forecasts", Proc. SPIE 6301, Atmospheric and Environmental Remote Sensing Data Processing and Utilization II: Perspective on Calibration/Validation Initiatives and Strategies, 63010G (1 September 2006); https://doi.org/10.1117/12.683822

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KEYWORDS

Satellites

Clouds

Convection

Satellite imaging

Analytical research

Earth observing sensors

Atmospheric sensing

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