alexa
Reach Us +447460731551
Characteristics Of Climatological, Dry And Wet Summer Monsoon In Pakistan By Focusing On The Upper Troposphere | 2491
ISSN: 2157-7617

Journal of Earth Science & Climatic Change
Open Access

Like us on:

Our Group organises 3000+ Global Conferenceseries Events every year across USA, Europe & Asia with support from 1000 more scientific Societies and Publishes 700+ Open Access Journals which contains over 50000 eminent personalities, reputed scientists as editorial board members.

Open Access Journals gaining more Readers and Citations
700 Journals and 15,000,000 Readers Each Journal is getting 25,000+ Readers

This Readership is 10 times more when compared to other Subscription Journals (Source: Google Analytics)
Recommended Conferences

9th World Conference on Earth Science

Beijing, China

2nd Global Summit on Earth Science and Climate Change

Prague, Czech Republic

9th World Climate Congress & Expo

Valencia, Spain
Share This Page

Characteristics of climatological, dry and wet summer monsoon in Pakistan by focusing on the upper troposphere

International Conference on Earth Science & Climate Change

Shakil Ahmad, Toshio Koike and Kazuaki Nishii

Accepted Abstracts: J Earth Sci Climate Change

DOI: 10.4172/2157-7617.S1.007

Abstract
The summer monsoon sometimes brings severe droughts and intense flooding in many parts of the world including South Asian countries like Pakistan. So, an essential question arises ?how can we contribute better to manage the water resources of the region for the societal needs?. By data analysis, the basis of the dynamical processes associated with upper tropospheric conditions during the climatological mean Pakistan Summer Monsoon (PSM) and its extreme events has been developed in the current study. During PSM mature phase, the climatological-mean structure of atmosphere favors convective activity compared to premonsoon phase, by weakening the mid-upper level subsidence together with the increasing of moisture flux in the lower troposphere from Arabian Sea and Bay of Bengal. Specifically, the upper-level convergence and subsidence observed over Pakistan during pre-monsoon phase reallocates to northwest of Pakistan during mature phase. However, PSM extreme dry (wet) events were closely related with the upper tropospheric cyclonic (anticyclonic) anomaly northwest of Pakistan and the associated cold (warm) temperature anomaly. This anomalous state of upper tropospheric cyclonic (anticyclonic) circulation is accompanied with the anomalous upper level convergence (divergence) around Pakistan, which anomalously weakens (strengthens) the climatological mean PSM trough to suppress (enhance) the PSM activities. We found two possibilities i.e. Matsuno-Gill type atmospheric response from the tropics and/or the Rossby wave train along the Asian Jet to trigger, reinforce, and maintain the upper-tropospheric cyclonic (anticyclonic) circulation. However what (i.e. source) triggers the circulation anomaly from the tropics and/or extratropics needs further investigations to reach a definite conclusion.
Biography
Shakil Ahmad has completed his PhD at the age of 37 years from the University of Tokyo and presently working as Project Researcher since October 2011 at the University of Tokyo, Japan. He has published more than 5 papers in the reputed journals and also presented his PhD research in reputed couple of international conferences, like AGU, WCRP, EGU, etc.
Top