@Article{NyassorWGPVNTBFB:2021:CaStCo,
author = "Nyassor, Prosper Kwamla and Wrasse, Cristiano Max and Gobbi,
Delano and Paulino, Igo and Vadas, S. L. and Naccarato, Kleber
Pinheiro and Takahashi, Hisao and Bageston, Jos{\'e} Valentin and
Figueiredo, Cosme Alexandre Oliveira Barros and Barros, Diego",
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 Campina
Grande (UFCG)} and {NorthWest Research Associates} and {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)} and {Instituto Nacional de Pesquisas Espaciais (INPE)}",
title = "Case Studies on Concentric Gravity Waves Source using Lightning
Flash Rate, Brightness Temperature and Backward Ray Tracing at
S{\~a}o Martinho da Serra (29.44°S, 53.82°W)",
journal = "Journal of Geophysical Research: Atmospheres",
year = "2021",
volume = "126",
pages = "1--22",
abstract = "We relate the spatial and temporal distribution of lightning flash
rates and cloud top brightness temperature (CTBT) to concentric
atmospheric gravity wave (CGW) events observed at the Southern
Space Observatory (SSO) in S{\~a}o Martinho da Serra (29.44°S,
53.82°W, 488.7\m) in southern Brazil. The selected
identified cases from 2017 to 2018 were observed by a hydroxyl
(OH) all-sky imager. Backward ray tracing shows that the time of
gravity wave excitation agrees with the highest values of
lightning flash rates (indicating lightning jump) as well as the
coldest brightness temperatures that indicate the time of
convective overshoot. Radiosonde measurements show high convective
available potential energy (CAPE), associated with a maximum
updraft velocity just prior to the wave events. We find that these
possible source locations correspond to the positions and times
that convective plumes overshot the tropopause (seen in GOES-16
CTBT images). We also show that higher spatial lightning density
(i.e., number of lightning flashes at a given longitude and
latitude) agree with the overshoot locations from the GOES
satellite. We also find that the overshoot times from the GOES-16
satellite agree with the times lightning jumps were observed in
the lightning flash rate. Finally, we find that the periodicities
in the lightning flash rate agree with the periods of the observed
CGWs, which further strengthens the result that the CGWs were
excited by the deep convective systems determined from backward
ray tracing.",
doi = "10.1029/2020JD034527",
url = "http://dx.doi.org/10.1029/2020JD034527",
issn = "2169-897X",
label = "lattes: 8485072131969726 10 NyassorWGPVNTBFB:2021:CaStCo",
language = "en",
targetfile = "nyassor_case.pdf",
urlaccessdate = "08 maio 2024"
}