Blog
About

12
views
0
recommends
+1 Recommend
0 collections
    3
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Impact Assessment of Orography on the Extreme Precipitation Event of July 2010 over Pakistan: A Numerical Study

      , , , ,

      Advances in Meteorology

      Hindawi Limited

      Read this article at

      ScienceOpenPublisher
      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          The topography influences monsoon precipitation and gives rise to significant rainfall events in South Asia. The physical mechanism involved in such events includes mechanical uplifting, thermodynamics, small scale cloud processes, and large scale atmospheric circulations. The investigation into orographic precipitation is pursued by synoptic and model analysis. Deep convection occurs as warm moist airflow is channeling over steep mountains. WRF model coupled with Morrison double moment scheme is used to assess the relative impact of topography on extreme rainfall event of 26–30 July 2010 in Pakistan. Two sensitivity tests with full topography (CTL) and reduced topography by 50% (LOW) are carried out. Two distinct precipitation zones over Hindukush and Himalaya mountains are identified. The topographic changes significantly affect moisture divergence and spatial and temporal distribution of precipitation. A low level jet is created on windward side of big mountains, yielding enhanced moisture flux and instability. Eddy kinetic energy significantly changes with orographic height. Energy flux created further unstabilized atmosphere and deep convection, producing wide spread heavy rainfall in the area in Himalaya foothills. Under the set synoptic conditions, orographic orientation enhanced the moisture accumulation and deep convection, resulting in occurrence of this extreme event.

          Related collections

          Most cited references 54

          • Record: found
          • Abstract: not found
          • Article: not found

          A New Vertical Diffusion Package with an Explicit Treatment of Entrainment Processes

            Bookmark
            • Record: found
            • Abstract: not found
            • Article: not found

            Mesoscale convective systems

             Robert Houze (2004)
              Bookmark
              • Record: found
              • Abstract: not found
              • Article: not found

              The Onset and Interannual Variability of the Asian Summer Monsoon in Relation to Land–Sea Thermal Contrast

                Bookmark

                Author and article information

                Journal
                Advances in Meteorology
                Advances in Meteorology
                Hindawi Limited
                1687-9309
                1687-9317
                2015
                2015
                : 2015
                :
                : 1-20
                Article
                10.1155/2015/510417
                © 2015

                http://creativecommons.org/licenses/by/3.0/

                Comments

                Comment on this article