Estudo da variabilidade espacial e temporal da profundidade óptica do aerossol obtida com o MODIS sobre a região amazônica

Rocha, V.; Yamasoe, Márcia Akemi

doi:10.1590/s0102-77862013000200010

Cited by 16 publications

(3 citation statements)

References 7 publications

(8 reference statements)

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“…No processo indireto, o aerossol pode atuar como núcleo de condensação de nuvens, alterando propriedades das nuvens como refletância, tempo de vida, fase, tamanho e precipitação (KOREN et al, 2007;ROCHA;YAMASOE, 2013).…”

Section: Introductionunclassified

Relação Entre Profundidade Óptica De Aerossóis E Radiação Fotossinteticamente Ativa E Global No Cerrado Mato-Grossense

et al. 2017

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Resumo:As ações antrópicas, em especial a queima de biomassa, são as principais responsáveis pelo envio de aerossóis para a atmosfera, e esse particulado exerce influência sobre o balanço de energia e os ciclos hidrológicos, fazendo com que o seu estudo seja inerente à compreensão desses processos. Cientes disso, o objetivo deste estudo foi obter uma relação entre a profundidade ótica dos aerossóis (POA) e a radiação solar incidente em área de Cerrado em MT. Utilizou-se dados de POA coletados de jan/2010 a dez/2012, obtidos pela rede AERONET (Aerosol Robotic Network -NASA). Esses dados foram analisados em conjunto com dados de focos de queimadas, sendo possível encontrar altos valores de POA nas estações secas, chegando a uma média de 3,8 em 2010. Tanto a radiação global (R g ) quanto a radiação fotossinteticamente ativa (RFA) tem correlação significativa (p < 0.01 para 2011 e 2013, p < 0.05 para 2011) com POA, e altos valores de POA correspondem a uma quantidade significativa de particulados na atmosfera, diminuindo a intensidade da radiação solar e provocando alterações de sua distribuição no sistema superfície-atmosfera.Palavras-chave: Radiação solar. AERONET. Balanço de radiação. Queimadas. RELATIONSHIP BETWEEN AEROSOLS OPTICAL DEPTH AND PHOTOSYNTHETICALLY AND GLOBAL RADIATION IN A SAVANNA OF MATO GROSSO, BRAZILAbstract: The anthropic activities, particularly the biomass burning, are the main responsible source of aerosols to the atmosphere, and this particulate matter influences the regional energy balance and hydrological cycle, studying this is inherent to the understanding of these processes. The goal of this study is obtain a relationship

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Section: Introductionunclassified

Relação Entre Profundidade Óptica De Aerossóis E Radiação Fotossinteticamente Ativa E Global No Cerrado Mato-Grossense

et al. 2017

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“…The most AOD 550nm critical period begins in July and is consistent from year to year. In general, this period can last just a few weeks, depending on the dry season severity that is related to El Niño Southern Oscillation (ENSO) [5,14].…”

Section: Introductionmentioning

confidence: 99%

Variability of Aerosol Optical Depth over Cerrado of Mato Grosso, Brazil

Palácios¹,

Sallo²,

Nogueira³

2016

eer

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The optical properties of aerosols have an important meaning in atmospheric research issues. This work proposes a seasonal and inter-annual characterization of the Aerosol Optical Depth (AOD) at 500 nm through a transition region Pantanal, Cerrado (Cerrado characteristics) in the south central region of the State of Mato Grosso. AOD 500 nm data were acquired from the network AERONET 2001 to 2013. The daily values AOD 500 nm have a seasonal pattern, with minimum and maximum in the wet and dry seasons, respectively. The minimum values were mostly around to 0,02 in the wet season while the maximum values close to 5,23 in the dry season. Regarding the inter-annual characterization, it was found that is not a periodic behavior with large variations from year to year. The monthly averages of AOD 500nm were correlated with the monthly records of fire outbreaks in the State of Mato Grosso, however, there was no statistically significant correlation, which shows that this relationship exists, but it is not simple.

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“…In Marabá, there is a higher variation from one season to an- The AOD value is an indication that the local atmosphere is polluted, as it estimates the concentration of aerosols in the atmospheric column by the scattering of solar radiation (Paixão, 2011). Other studies also indicate an increase in both the AOD and wildfires in locations with high atmospheric pollution (Rocha and Yamasoe, 2013).…”

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Relationship between respiratory diseases and environmental conditions: a time-series analysis in Eastern Amazon

Moura

Vitorino

Cirino

et al. 2021

Rev. Bras. Ciênc. Ambient.

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This study examines the relationship between the time-series analysis of climate, deforestation, wildfire, Aerosol Optical Depth (AOD), and hospital admissions for respiratory diseases in the Eastern Amazon. Through a descriptive study with an ecological approach of an 18-year time-series analysis, we made a statistical analysis of two pre-established periods, namely, the rainy season and the dry season. On a decadal scale, analyzing the signals of climate indices [i.e., the Southern Oscillation Index (SOI) and the Atlantic Meridional Mode (AMM)], the city of Marabá presents correlations between hospital admissions, wildfire, and AOD. This is not observed with the same accuracy in Santarém. On a seasonal scale, our analysis demonstrated how both cities in this research presented an increase in the number of hospital admissions during the dry season: Marabá, 3%; Santarém, 5%. The same season also presented a higher number of fire outbreaks, AOD, and higher temperatures. The AOD monthly analysis showed that the atmosphere of Marabá may be under the influence of other types of aerosols, such as those from mining activities. There is a time lag of approximately 2 months in the records of wildfire in the city. Such lag is not found in Santarém. The linear regression analysis shows that there is a correlation above 64% (Marabá) and 50% (Santarém), which is statistically significant because it proves that the number of hospital admissions for respiratory diseases is dependable on the AOD value. From the cities in the study, Marabá presents the highest incidence of wildfire, with an average of 188.5— the average in Santarém is 68.7—, and therefore the highest AOD value, with an average of 0.66 (Santarém, 0.47), both during the dry season. It is evident that the climate component has a relevant contribution to the increase in the number of hospital admissions, especially during the rainy season, where there are few or no records of wildfires.

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Estudo da variabilidade espacial e temporal da profundidade óptica do aerossol obtida com o MODIS sobre a região amazônica

Cited by 16 publications

References 7 publications

Relação Entre Profundidade Óptica De Aerossóis E Radiação Fotossinteticamente Ativa E Global No Cerrado Mato-Grossense

Relação Entre Profundidade Óptica De Aerossóis E Radiação Fotossinteticamente Ativa E Global No Cerrado Mato-Grossense

Variability of Aerosol Optical Depth over Cerrado of Mato Grosso, Brazil

Relationship between respiratory diseases and environmental conditions: a time-series analysis in Eastern Amazon

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