@InProceedings{AzambujaZepkVargPint:2014:LiAcMe,
author = "Azambuja, Rodrigo da Rosa and Zepka, Gisele dos Santos and Vargas
Junior, Vanderlei Rocha de and Pinto J{\'u}nior, Osmar",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas
Espaciais (INPE)}",
title = "Lightning Activity in Mesoscale Convective System associated with
Different Synoptic Situations over Southern South America",
booktitle = "Proceedings...",
year = "2014",
organization = "International Lightning Detection Conference, 23. (ILDC); and
International Lightning Meteorology Conference, 5 (ILMC).",
keywords = "lightning, mesoscale convective systems, synoptic analysis.",
abstract = "Two Mesoscale Convective System (MCS) events that occurred in the
southern portion of South America will be analyzed in order to
characterize the local lightning activity related with different
synoptic situations. On December 10-11, 2012, a MCS, originated by
a cyclone centered over the Atlantic Ocean, presented an organized
convective activity moving northeastward. This MCS formed in an
area of baroclinic flow in the vanguard of a cold front. This
feature was trivial in determining MCS displacement velocity, and
consequently lightning density in the region. The other MCS that
occurred on December 12-13, 2012 was generated by a low pressure
area located in the central region of South America (Chaco Low),
and showed disorganized convective activity moving
(northwestward). This MCS formed due mainly thermodynamic factors
in the lower troposphere and divergence in the upper troposphere
by the interaction of the subtropical jet. In both MCSs lightning
density in the region was influenced by the synoptic situation
which the MCS was formed. Being influenced by the velocity and
direction of MCS displacement. The rate of occurrence and polarity
of lightning as well as the IC/CG and CG+/CG- rates were not
affected by the different conditions that the MCSs were formed.The
data set used in the present study will consider: (1) lightning
location and polarity from BrasilDAT, (2) analysis and forecasts
from WRF model, and (3) infrared channel data from Satellite
GOES-12.",
conference-location = "Tucson",
conference-year = "mar. 18-19, 2014 / mar. 20-21, 2014",
label = "lattes: 3066488941709713 1 AzambujaZepkVargPint:2014:LiAcMe",
language = "pt",
targetfile = "Azambuja et al - Lightning Activity in MCS over Southern South
America-2014-ILDC-ILMC.pdf",
urlaccessdate = "26 abr. 2024"
}