@Article{PezziSouFarAceMil:2016:SiOb,
author = "Pezzi, Luciano Ponzi and Souza, Ronald Buss de and Farias, P. C.
and Acevedo, O. and Miller, A. J.",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Universidade Federal de Santa
Maria (UFSM)} and {University of California}",
title = "Air-sea interaction at the Southern Brazilian Continental Shelf:
In situ observations",
journal = "Journal of Geophysical Research: Oceans",
year = "2016",
volume = "121",
number = "9",
pages = "6671--6695",
month = "Sept.",
keywords = "air-sea fluxes of heat, air-sea interaction, cross-shelf thermal
gradients, MABL stability, marine atmospheric boundary layer,
Southern Brazilian Continental shelf.",
abstract = "The influence of the cross-shelf oceanographic front occurring
between the Brazil Current (BC) and the Brazilian Coastal Current
(BCC) on the local Marine Atmospheric Boundary Layer (MABL) is
investigated here. This front is typical of wintertime in the
Southern Brazilian Continental Shelf (SBCS) and this is the first
time that its effects are investigated over the above MABL. Here
we analyze variability, vertical structure, and stability of MABL
as well as heat fluxes at air-sea interface, across five
oceanographic transects in the SBCS made during a winter 2012
cruise. Local thermal gradients associated with mixing between
distinct water masses, play an essential role on MABL modulation
and stability. Although weaker when compared with other frontal
regions, the cross-shelf thermal gradients reproduce exactly what
is expected for open ocean regions: Stronger (weaker) winds, lower
(higher) sea level pressure, and a more unstable (stable) MABL are
found over the warm (cold) side of the oceanographic front between
the BC (warm) and coastal (cold) waters. Our findings strongly
support the coexistence of both known MABL modulation mechanisms:
the static and hydrostatic MABL stability. This is the first time
that these modulation mechanisms are documented for this region.
Turbulent fluxes were found to be markedly dependent on the
cross-shelf SST gradients resulting in differences of up to 100
W.m\−2 especially in the southernmost region where the
gradients were more intense.",
doi = "10.1002/2016JC011774",
url = "http://dx.doi.org/10.1002/2016JC011774",
issn = "2169-9275",
language = "en",
targetfile = "pezzi_air.pdf",
urlaccessdate = "27 abr. 2024"
}