@InProceedings{PezziSouLenGarMat:2006:SiOcSi,
               author = "Pezzi, Luciano Ponzi and Souza, Ronald Buss and Lentini, Carlos A. 
                         D. and Garcia, Carlos A. and Mata, Mauricio M.",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)}",
                title = "Simultaneous ocean-atmosphere in situ observations at the 
                         Brazil-Malvinas Confluence region",
            booktitle = "Proceedings...",
                 year = "2006",
               editor = "Vera, Carolina and Nobre, Carlos",
                pages = "1323--1328",
         organization = "International Conference on Southern Hemisphere Meteorology and 
                         Oceanography, 8. (ICSHMO).",
            publisher = "American Meteorological Society (AMS)",
              address = "45 Beacon Hill Road, Boston, MA, USA",
             keywords = "ocean-atmosphere interaction, Brazil-Malvinas confluence, in situ 
                         observations, MABL-OBL.",
             abstract = "The Brazil-Malvinas Confluence (BMC) region is acknowledged as one 
                         of the most energetic regions of the World´s Ocean. This region is 
                         characterized by the meeting of two opposing boundary currents: 
                         the Brazil and the Malvinas currents. At the Confluence, tropical 
                         warm and saline waters, transported by the Brazil Current (BC), 
                         interact with subantarctic cool and less saline waters of the 
                         Malvinas Current (MC), forming an active and nonsteady meandering 
                         frontal region. Moreover, due to the BMC closeness to the 
                         continent, its impact over the regional climate may be 
                         significant, although this issue has never been thoroughly 
                         investigated. This work presents novel simultaneous in situ 
                         ocean-atmosphere (OA) observations at the BMC region based on 
                         observational data collected simultaneously at both the Marine 
                         Atmospheric Boundary Layer (MABL) and the Oceanic Boundary Layer 
                         (OBL) on board the Brazilian Navy R/V Ary Rongel in November 2004. 
                         To our knowledge, this is the first simultaneous observation of 
                         the MABL and the OBL in the region. Furthermore, it is expected 
                         that the MABL would be affected by the BMC dynamics due to its 
                         high spatial-temporal variability. Our results show that air-sea 
                         exchanges are closely correlated with the SST fields. Heat flux 
                         calculations range from 110 W.m-2 over warm waters down to 18 
                         W.m-2 over cold waters. High values of heat flux and air-sea 
                         temperature differences are associated with relatively strong 
                         near-surface winds. On the absence of strong large-scale synoptic 
                         systems, our observations suggest that MABL is modulated by the 
                         strong local sea surface thermal gradients. These measurements 
                         have shown that OA exchanges are closely related to the SST 
                         fields: weak (strong) winds are observed over cold (warm) waters 
                         in a cool (warm) atmosphere, which indicates a stable (unstable) 
                         MABL. This suggests that the MABL is modulated at the synoptic 
                         temporal and spatial scale by strong surface thermal gradients 
                         between the warm Brazil and the cool Malvinas currents. This 
                         process has been documented at the synoptic scale for other 
                         regions around the world but not yet for the BMC region. The 
                         prevailing mechanisms between the local forcing, which induce the 
                         MABL-OBL interaction, and the large scale on modulating the 
                         air-sea interaction are still an open issue and deserve further 
                         investigation. A new cruise is going to take place November 2005 
                         and the same sampling strategy will be repeated.",
  conference-location = "Foz do Igua{\c{c}}u",
      conference-year = "24-28 Apr. 2006",
           copyholder = "SID/SCD",
             language = "en",
         organisation = "American Meteorological Society (AMS)",
                  ibi = "cptec.inpe.br/adm_conf/2005/10.21.16.28",
                  url = "http://urlib.net/ibi/cptec.inpe.br/adm_conf/2005/10.21.16.28",
           targetfile = "1323-1328.pdf",
                 type = "Role of the SH oceans in climate",
        urlaccessdate = "25 abr. 2024"
}