author = "Ramos, Diogo Nunes da Silva and Reyes Fernandez, Julio Pablo and 
                         Fisch, Gilberto",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto de 
                         Aeron{\'a}utica e Espa{\c{c}}o (IAE)}",
                title = "Evolution of the Planetary Boundary Layer on the northern coast of 
                         Brazil during the CHUVA campaign",
              journal = "Atmospheric Research",
                 year = "2018",
               volume = "203",
                pages = "298--310",
                month = "May",
             keywords = "Tropical planetary boundary layer, Lapse rate, Wind profile, 
                         Atmospheric stability, Nighttime precipitation.",
             abstract = "This study aims to characterize the wind and thermodynamic 
                         structure of the Planetary Boundary Layer (PBL) on the northern 
                         coast of Brazil (NCB) via the CHUVA datasets. Three synoptic 
                         conditions were present in the NCB region between March 1 and 25, 
                         2010: a dry period, the Upper Tropospheric Cyclonic Vortex (UTCV) 
                         and the Intertropical Convergence Zone (ITCZ). Nighttime 
                         precipitation accounted for 78% of the total precipitation 
                         observed in the month, mainly during the ITCZ. In general, the 
                         surface meteorological fields were few changed by intense weather 
                         events due to proximity to the ocean and the predominant 
                         contribution of the northeasterly trade winds. There was also a 
                         weak sea breeze signal that maintained the horizontal moisture 
                         flow in the studied area. On dry days, the PBL depth was higher, 
                         drier, and warmer, resulting in stronger winds below 500 m. 
                         Moreover, trends throughout the period suggest that PBLs are 
                         near-neutral below 500 m. However, the wind variability was 
                         intensified by up to 20% due to downdrafts and higher wind shears 
                         during the deep convection mechanisms derived by UTCV. 
                         Furthermore, ITCZ mixed rainfall cooled the PBL at approximately 2 
                         K, making it very stable according to the Richardson number 
                         classification adopted. The observed temporal and spatial scale 
                         represent challenges to the physical parameterizations used to 
                         improve numerical weather prediction models over tropical coastal 
                  doi = "10.1016/j.atmosres.2017.12.016",
                  url = "http://dx.doi.org/10.1016/j.atmosres.2017.12.016",
                 issn = "0169-8095",
             language = "en",
           targetfile = "ramos_evolution.pdf",
        urlaccessdate = "13 jun. 2021"