• Login
    View Item 
    •   Home
    • Research
    • Articles
    • View Item
    •   Home
    • Research
    • Articles
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of KAUSTCommunitiesIssue DateSubmit DateThis CollectionIssue DateSubmit Date

    My Account

    Login

    Quick Links

    Open Access PolicyORCID LibguideTheses and Dissertations LibguideSubmit an Item

    Statistics

    Display statistics

    Two contrasting summer monsoon seasons in the recent past decade: An observational study

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    Manuscript-2021 (1).pdf
    Size:
    3.135Mb
    Format:
    PDF
    Description:
    Accepted manuscript
    Download
    Type
    Article
    Authors
    Raju, A. Dharma cc
    Naidu, C. V.
    Karumuri, Rama Krishna
    Kumar, S. V.J.
    Ratna, K. Naga
    KAUST Department
    King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
    Date
    2021-04-09
    Online Publication Date
    2021-04-09
    Print Publication Date
    2021-06
    Submitted Date
    2020-03-18
    Permanent link to this record
    http://hdl.handle.net/10754/668963
    
    Metadata
    Show full item record
    Abstract
    Abstract: India experienced two extreme summer monsoons, 2007 (active monsoon) and 2009 (weak monsoon) in the recent past decade. The characteristic features of these two contrasting Indian summer monsoons have been presented. The country received 11.8% excess and 17.1% deficit rainfall during 2007 and 2009 monsoon seasons, respectively. These large deviations in rainfall encourage us to study the influence of meteorological factors on rainfall activity. The distributions of rainfall over India, latent heat flux, wind, Vertically Integrated Moisture Transport (VIMT), and Vertically Integrated Moisture Divergence (VIMD) values in the layer 1000–300 hPa for the domain, 0°–40°N, 40°–120°E in the two contrasting monsoon seasons are evaluated. In active monsoon, (i) predominant low level southwesterly flow over the Arabian sea and deflection of winds over the Bay of Bengal, strengthening of the tropical easterly jet stream, wide area extent of easterlies in the upper troposphere, the maximum strength of easterlies in the upper troposphere (150 hPa) is observed over the area around 10°–15°N and 70°–75°E; (ii) position of subtropical ridge is more northward, i.e., 32°N; (iii) a predominant moisture transport in the layer 1000–300 hPa from Southern Hemisphere, Arabian Sea and the Bay of Bengal to the Indian mainland, westward/northward transport of moisture and area coverage of larger quantum of moisture flux is seen; and (iv) India experienced more number of mesoscale systems. The reverse is true for weak monsoon. Positive (neutral) Indian Ocean Dipole (IOD) and La-Nina (El-Nino) conditions lead to active (poor) summer monsoon conditions over India in 2007 (2009) year. Highlights: The inter-annual variations in summer monsoon rainfall over India exhibited two extreme summer monsoons 2007 (active) and 2009 (weak) during recent past decade, 2001–2010.Dominant lower and upper tropospheric circulations over monsoon region are evident in the active monsoon.The incursion of subtropical westerlies in the mid as well as upper troposphere inhibits the rainfall activity over India in the weak monsoon season.A predominant moisture transport from the surrounding oceanic area as well as Southern Hemisphere to Indian mainland is seen in the active monsoon.The moisture divergence over the surrounding oceanic area is high in active monsoon.
    Citation
    Raju, A. D., Naidu, C. V., Karumuri, R. K., Kumar, S. V. J., & Ratna, K. N. (2021). Two contrasting summer monsoon seasons in the recent past decade: An observational study. Journal of Earth System Science, 130(2). doi:10.1007/s12040-021-01559-5
    Sponsors
    The authors express their gratitude to the DGM, IMD for his encouragement. The authors are also grateful to the NCEP-NCAR for providing data resources. Thanks are also due to anonymous reviewers without whose probing queries this work would not have been more refined and boiled to the crux.
    Publisher
    Springer Science and Business Media LLC
    Journal
    Journal of Earth System Science
    DOI
    10.1007/s12040-021-01559-5
    Additional Links
    https://link.springer.com/10.1007/s12040-021-01559-5
    ae974a485f413a2113503eed53cd6c53
    10.1007/s12040-021-01559-5
    Scopus Count
    Collections
    Articles

    entitlement

     
    DSpace software copyright © 2002-2022  DuraSpace
    Quick Guide | Contact Us | KAUST University Library
    Open Repository is a service hosted by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items. For anonymous users the allowed maximum amount is 50 search results.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.