@Article{GovardhanRaoAsho:2017:UnReIn,
               author = "Govardhan, Dandu and Rao, Vadlamudi Brahmananda and Ashok, 
                         Karumuri",
          affiliation = "{University of Hyderabad} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {University of Hyderabad}",
                title = "Understanding the revival of the Indian summer monsoon after 
                         breaks",
              journal = "Journal of the Atmospheric Sciences",
                 year = "2017",
               volume = "74",
               number = "5",
                pages = "1417--1429",
                month = "May",
             abstract = "In this paper, the authors suggest a dynamical mechanism involved 
                         in the revival of the summer monsoon after breaks. In this 
                         context, the authors carry out a diagnostic analysis using the 
                         datasets from National Centers for Environmental Prediction 
                         Reanalysis 2 for the period 1979-2007 to identify a robust 
                         mechanism that typifies breaks and subsequent revival of monsoon. 
                         The authors find during the peak of significant breaks an 
                         anomalous southward shift of the subtropical westerly jet stream, 
                         which is invariably accompanied by an anomalous northward shift of 
                         a stronger-than-normal easterly jet. These major changes during a 
                         break facilitate an instability mechanism, which apparently leads 
                         to formation of a synoptic disturbance. Formation of such a 
                         disturbance is critical to the subsequent revival of the summer 
                         monsoon in 61% of the observed break-to- active revivals. 
                         Computations of energetics and correlation analysis carried out 
                         suggest an increase in the eddy kinetic energy at the expense of 
                         the mean kinetic energy during the breaks, in agreement with the 
                         formation of the synoptic disturbance. This demonstrates that 
                         barotropic instability in the presence of a monsoon basic flow is 
                         the primary physical mechanism that controls the revival of the 
                         summer monsoon subsequent to the break events.",
                  doi = "10.1175/JAS-D-16-0325.1",
                  url = "http://dx.doi.org/10.1175/JAS-D-16-0325.1",
                 issn = "0022-4928",
             language = "en",
        urlaccessdate = "26 abr. 2024"
}