1 / 18

WSN05, Toulouse France, September 2005

NOWCASTING PROBLEM IN A SUBTROPICAL AREA WITH COMPLEX TERRAIN: LESSON LEARNED FROM A FLASH FLOOD CASE. WSN05, Toulouse France, September 2005. Ben Jong-Dao Jou Department of Atmospheric Sciences National Taiwan University. Asia Continent. Pacific Ocean. East Asia Monsoon. Pacific Ocean.

nasim-white
Download Presentation

WSN05, Toulouse France, September 2005

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. NOWCASTING PROBLEM IN A SUBTROPICAL AREA WITH COMPLEX TERRAIN: LESSON LEARNED FROM A FLASH FLOOD CASE WSN05, Toulouse France, September 2005 Ben Jong-Dao Jou Department of Atmospheric Sciences National Taiwan University

  2. Asia Continent Pacific Ocean East Asia Monsoon Pacific Ocean

  3. Taipei basin viewed from south. NTU Mu-Zai Hsin-Dien Wu-Lai

  4. Precipitation pattern

  5. Sounding at Panchiao (46692) and hodograph

  6. Composite maximum reflectivity at 3 km

  7. Local wind analysis

  8. SW NE SE NW

  9. NW SE

  10. Concluding Summary • the complex terrain in the northern Taiwan plays a subtle role in controlling the organization, propagation, and development of the severe multi-cellular thunderstorm systems in the area. • We have demonstrated, in this case study, that the importance of Doppler radar and mesonet in revealing the important mesoscale features and also the mesoscale processes associated with the formation and the propagation of this complex storm system. • It is not clear, however, which process(es) is (are) more important under different environmental conditions. Possibly due to the fast growth of the metropolitan area of Taipei city and possibly due to the global warming, the damages caused by these severe rainstorms in the great area of Taipei (an area of approximately 3,000 km2 with a population of 6 million) has been increased dramatically in the last 10 years. • In order to improve the forecast capability and to mitigate the damages caused by these short-term localized severe rainstorms, a very short term nowcasting system is needed. To establish a workable forecast system, a comprehensive observational and numerical simulation study is needed in order to get a better understanding of all these complicated mesosacle processes in complex terrain environment of northern Taiwan.

More Related