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@Article{AssireuDauhSantLore:2017:ObSaTr,
               author = "Assireu, Arcilan T. and Dauhut, Thibaut and Santos, Francisco A. 
                         dos and Lorenzzetti, Jo{\~a}o Ant{\^o}nio",
          affiliation = "{Universidade Federal de Itajub{\'a} (UNIFEI)} and 
                         {Universit{\'e} de Toulouse} and {PROOCEANO Servi{\c{c}}o 
                         Oceanogr{\'a}fico} and {Instituto Nacional de Pesquisas Espaciais 
                         (INPE)}",
                title = "Near-inertial motions in the Brazil Current at 24S-36S: 
                         Observations by satellite tracked drifters",
              journal = "Continental Shelf Research",
                 year = "2017",
               volume = "145",
                pages = "1--12",
                month = "Aug.",
             keywords = "Near-inertial currentsBrazil CurrentDriftersSubmesoscale flow.",
             abstract = "Increased spatial and temporal resolution of recent observations 
                         and modeling have pointed out the importance of small scale 
                         structures (in the range of 150 km) for the mixing processes in 
                         the ocean. Based on high-frequency drifter measurements, we show 
                         here that the near-inertial currents (NICs) can contribute 
                         significantly to the surface kinetic energy in the Brazil Current 
                         (BC) region and, therefore, should be properly taken into account 
                         in the studies of transport and mixing processes. To characterize 
                         these submesoscale features, we examine the current response to 
                         the wind forcing in the Brazilian ocean margin between 24S and 
                         36S using 3-hourly sampled trajectories of satellite-tracked 
                         drifters. Our results indicate a preference for anti-cyclonic 
                         circular motions, with a rotating period close to the local 
                         inertial period, consistent with near-inertial motions in the 
                         Southern Hemisphere (SH). Wind stress time series, from three 
                         months of wind measurements, along with synoptic weather charts, 
                         are used to relate the observed NICs to the atmospheric forcing. 
                         During SH spring, NICs occur in 4.7\−15 day bursts and 
                         account for 1545% of the total surface current variance. This 
                         intermittency is related to atmospheric cold frontal passages, low 
                         pressure systems, and sea breeze/land breeze circulations. The 
                         predominance of NICs south of 28S appears to be related to the 
                         increased Effective Inertial Frequency (EIF), which is the 
                         inertial frequency changed by the sub-inertial background flow.",
                  doi = "10.1016/j.csr.2017.07.005",
                  url = "http://dx.doi.org/10.1016/j.csr.2017.07.005",
                 issn = "0278-4343",
             language = "en",
           targetfile = "assireu_near.pdf",
        urlaccessdate = "24 nov. 2020"
}


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