Backward Adaptive Brightness Temperature Threshold Technique (BAB3T): A Methodology to Determine Extreme Convective Initiation Regions Using Satellite Infrared Imagery
Thunderstorms in southeastern South America (SESA) stand out in satellite observations as being among the strongest on Earth in terms of satellite-based convective proxies, such as lightning flash rate per storm, the prevalence for extremely tall, wide convective cores and broad stratiform region...
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Formato: | Artículo |
Lenguaje: | Inglés |
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Remote Sensing
2020
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Acceso en línea: | http://hdl.handle.net/20.500.12160/1288 https://doi.org/10.3390/rs12020337 |
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I63-R169-20.500.12160-1288 |
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institution |
Servicio Meteorológico Nacional (SMN) |
institution_str |
I-63 |
repository_str |
R-169 |
collection |
El Abrigo - Repositorio Institucional del Servicio Meteorológico Nacional (SMN) |
language |
Inglés |
topic |
CONVECTIVE INITIATION SATELLITE OBSERVATIONS ALGORITHMS SEVERE WEATHER |
spellingShingle |
CONVECTIVE INITIATION SATELLITE OBSERVATIONS ALGORITHMS SEVERE WEATHER Cancelada, Maite Salio, Paola Vila, Daniel Nesbitt, Steve Vidal, Luciano Backward Adaptive Brightness Temperature Threshold Technique (BAB3T): A Methodology to Determine Extreme Convective Initiation Regions Using Satellite Infrared Imagery |
topic_facet |
CONVECTIVE INITIATION SATELLITE OBSERVATIONS ALGORITHMS SEVERE WEATHER |
description |
Thunderstorms in southeastern South America (SESA) stand out in satellite observations as
being among the strongest on Earth in terms of satellite-based convective proxies, such as lightning
flash rate per storm, the prevalence for extremely tall, wide convective cores and broad stratiform
regions. Accurately quantifying when and where strong convection is initiated presents great interest
in operational forecasting and convective system process studies due to the relationship between
convective storms and severe weather phenomena. This paper generates a novel methodology to
determine convective initiation (CI) signatures associated with extreme convective systems, including
extreme events. Based on the well-established area-overlapping technique, an adaptive brightness
temperature threshold for identification and backward tracking with infrared data is introduced in
order to better identify areas of deep convection associated with and embedded within larger cloud
clusters. This is particularly important over SESA because ground-based weather radar observations
are currently limited to particular areas. Extreme rain precipitation features (ERPFs) from Tropical
Rainfall Measurement Mission are examined to quantify the full satellite-observed life cycle of
extreme convective events, although this technique allows examination of other intense convection
proxies such as the identification of overshooting tops. CI annual and diurnal cycles are analyzed
and distinctive behaviors are observed for different regions over SESA. It is found that near principal
mountain barriers, a bimodal diurnal CI distribution is observed denoting the existence of multiple
CI triggers, while convective initiation over flat terrain has a maximum frequency in the afternoon. |
format |
Artículo |
author |
Cancelada, Maite Salio, Paola Vila, Daniel Nesbitt, Steve Vidal, Luciano |
author_facet |
Cancelada, Maite Salio, Paola Vila, Daniel Nesbitt, Steve Vidal, Luciano |
author_sort |
Cancelada, Maite |
title |
Backward Adaptive Brightness Temperature Threshold Technique (BAB3T): A Methodology to Determine Extreme Convective Initiation Regions Using Satellite Infrared Imagery |
title_short |
Backward Adaptive Brightness Temperature Threshold Technique (BAB3T): A Methodology to Determine Extreme Convective Initiation Regions Using Satellite Infrared Imagery |
title_full |
Backward Adaptive Brightness Temperature Threshold Technique (BAB3T): A Methodology to Determine Extreme Convective Initiation Regions Using Satellite Infrared Imagery |
title_fullStr |
Backward Adaptive Brightness Temperature Threshold Technique (BAB3T): A Methodology to Determine Extreme Convective Initiation Regions Using Satellite Infrared Imagery |
title_full_unstemmed |
Backward Adaptive Brightness Temperature Threshold Technique (BAB3T): A Methodology to Determine Extreme Convective Initiation Regions Using Satellite Infrared Imagery |
title_sort |
backward adaptive brightness temperature threshold technique (bab3t): a methodology to determine extreme convective initiation regions using satellite infrared imagery |
publisher |
Remote Sensing |
publishDate |
2020 |
url |
http://hdl.handle.net/20.500.12160/1288 https://doi.org/10.3390/rs12020337 |
work_keys_str_mv |
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Repositorios |
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