10 October 2014 Mesoscale observational analysis of a strong squall line in its genesis and development over the Song-Nen Plain of NE China
Author Affiliations +
Abstract
A mesoscale observational analysis is performed of an event of rainstorm and intense convective weather as a robust happening during a 100-yr return period on August 10, 2006 in the Song-Nen Plain of NE China by use of minute-level automatic-station data, high-resolution satellite cloud maps, new-generation Doppler soundings and conventional observations. Results show that this event of rainstorm and robust convective weather is bound up with the genesis and development of a squall line, which causes great change in station meteorological elements on its way. At the Tailai station, for instance, precipitation is the strongest, reaching 90.8 mm/h, where temperature drops by 21.5°C, pressure rises by 4.7 hPa and winds peak between 13.3 to 22.6 m/s during the squall passage. The squall line is displayed as an elliptical MCC on satellite cloud maps and in its mature stage as a squall line on radar soundings. This squall shows a comma-form meso -β convective storm before its genesis, followed by propagation towards the southwest part of the storm and showing its bow-like echo zones followed by gradual appearance of multiple super cells, viz., multi-cell storm in the southwestern end of the echoes. These intense convective storm comprise linear strong convective echo bands, ~315 km in total length and 50 km wide, persisting for 7 hrs. When the squall line passes, there are a front low pressure, followed by a thunderstorm high pressure and a wake low differing in intensity.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Meiying Yuan, Meiying Yuan, Nanping Xu, Nanping Xu, Xiaoling Zhang, Xiaoling Zhang, Zechun Li, Zechun Li, Jun Sun, Jun Sun, "Mesoscale observational analysis of a strong squall line in its genesis and development over the Song-Nen Plain of NE China", Proc. SPIE 9245, Earth Resources and Environmental Remote Sensing/GIS Applications V, 92451A (10 October 2014); doi: 10.1117/12.2065098; https://doi.org/10.1117/12.2065098
PROCEEDINGS
11 PAGES


SHARE
Back to Top