@Article{PinheiroHodgGan:2020:ERNCME,
               author = "Pinheiro, Henri Rossi and Hodges, Kevin Ivan and Gan, Manoel 
                         Alonso",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {The 
                         University of Reading} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)}",
                title = "An intercomparison of subtropical cut-off lows in the Southern 
                         Hemisphere using recent reanalyses: ERA-Interim, NCEP-CFRS, 
                         MERRA-2, JRA-55, and JRA-25",
              journal = "Climate Dynamics",
                 year = "2020",
               volume = "54",
               number = "1/2",
                pages = "777--792",
                month = "jan.",
             keywords = "Cut-of lows · Comparison · Reanalysis · Objective identifcation · 
                         Climatology.",
             abstract = "Four recent reanalysis products ERA-Interim, NCEP-CFSR, MERRA-2 
                         and JRA-55 are evaluated and compared to an older reanalysis 
                         JRA-25, to quantify their confdence in representing Cut-of lows 
                         (COLs) in the Southern Hemisphere. The climatology of COLs based 
                         on the minima of 300-hPa vorticity (\휉300) and 300-hPa 
                         geopotential (Z300) provides diferent perspectives of COLs and 
                         contributes to the understanding of the discrepancies observed in 
                         the literature regarding their numbers and seasonality. The COLs 
                         compare better among the newest reanalyses than compared to the 
                         older reanalysis JRA-25. The diference in number between the 
                         latest reanalyses are generally small for both \휉300 and, 
                         with more COLs identifed in \휉300 than in Z300 for all 
                         reanalyses. The spatial diferences observed between the newest 
                         reanalyses are mainly due to diferences in the track lengths, 
                         which is larger in ERA-Interim and JRA-55 than in NCEP-CFSR and 
                         MERRA-2, resulting in disparities in the track density. This is 
                         likely due to the diference in the assimilation data system used 
                         in each reanalysis product. The largest diferences in intensities 
                         occur in the \휉300, because this feld is very sensitive to 
                         the reanalysis resolution. The mean separation distance of the 
                         COLs that match between the latest reanalyses are generally small, 
                         while the older JRA-25 has a broader distribution and larger 
                         number of matches with relatively large distances, indicating 
                         larger uncertainties in location of COLs. The results show 
                         signifcant improvements for the most recent reanalyses compared to 
                         the older JRA-25 reanalysis, indicating a progress in representing 
                         the COL properties.",
                  doi = "10.1007/s00382-019-05089-1",
                  url = "http://dx.doi.org/10.1007/s00382-019-05089-1",
                 issn = "0930-7575",
             language = "en",
           targetfile = "pinheiro_an.pdf",
        urlaccessdate = "28 abr. 2024"
}