Impacts of Biomass Burning in the Atmosphere of the Southeastern Region of Brazil Using Remote Sensing Systems

Lopes, Fabio J.S.; Mariano, Glauber Lopes; Landulfo, Eduardo; Mariano, Ericka Voss Chagas

doi:10.5772/50406

Cited by 7 publications

(14 citation statements)

References 32 publications

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“…The level 1 products are made up of calibrated and geolocated profiles of the attenuated backscatter returned signal. Level 2 products, in comparison, are derived from level 1 products and are classified in three types: profile, vertical feature mask, and layer products (Lopes et al, 2012). Layer products provide layer-averaged properties of detected aerosol and cloud.…”

Section: Aerosols and Sulfur Dioxide Observationsmentioning

confidence: 99%

Statistical analysis of the long-range transport of the 2015 Calbuco volcanic plume from ground-based and space-borne observations

et al. 2020

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Abstract. This study investigates the influence of the 2015 Calbuco eruption (41.2∘ S, 72.4∘ W; Chile) on the total columnar aerosol optical properties over the Southern Hemisphere. The well-known technic of sun photometry was applied for the investigation of the transport and spatio-temporal evolution of the optical properties of the volcanic plume. The CIMEL sun photometer measurements performed at six South American and three African sites were statistically analysed. This study involves the use of the satellite observations and a back-trajectory model. The passage of the Calbuco plume is statistically detectable in the aerosol optical depth (AOD) observations obtained from sun photometer and MODIS observations. This statistical detection confirms that the majority of the plume was transported over the northeastern parts of South America and reached the South African region 1 week after the eruption. The plume impacted the southern parts of South America to a lesser extent. The highest AOD anomalies were observed over the northeastern parts of South America. Over the South African sites, the AOD anomalies induced by the spread of the plume were quite homogeneously distributed between the east and west coasts. The optical characteristics of the plume near the source region were consistent with an ash-bearing plume. Conversely, sites further from the Calbuco volcano were influenced by ash-free plume. The optical properties discussed in this paper will be used as inputs for numerical models for further investigation of the ageing of the Calbuco plume in a forthcoming study.

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Section: Aerosols and Sulfur Dioxide Observationsmentioning

confidence: 99%

Statistical analysis of the long-range transport of the 2015 Calbuco volcanic plume from ground-based and space-borne observations

et al. 2020

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“…MIXA represents indistinguishable aerosol type that lies beyond the threshold ranges. ern SEA because of different types of burning processes (Wardoyo, 2007;Lopes et al, 2012;Bougiatioti et al, 2014;Kaskaoutis et al, 2014). As a result, a bimodal pattern was observed only for the northeast monsoon period (Fig.…”

Section: Seasonal Flow Patterns Of Air Parcels From the Hysplit_4 Modmentioning

confidence: 99%

“…α a can be obtained once β a and L are known. The value of L has to be assumed for an elastic LIDAR system (Fernald, 1984;He et al, 2006;Lopes et al, 2012). Normally, L values can range from 20-40 sr for clean and polluted marine aerosol particles or dust, urban aerosols (40-60 sr), and biomass burning aerosols (60-80 sr) as suggested by Chew et al (2013).…”

Section: Methodology and Statistical Modelmentioning

confidence: 99%

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Monsoonal variations in aerosol optical properties and estimation of aerosol optical depth using ground-based meteorological and air quality data in Peninsular Malaysia

et al. 2015

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Abstract. Obtaining continuous aerosol-optical-depth (AOD) measurements is a difficult task due to the cloudcover problem. With the main motivation of overcoming this problem, an AOD-predicting model is proposed. In this study, the optical properties of aerosols in Penang, Malaysia were analyzed for four monsoonal seasons (northeast monsoon, pre-monsoon, southwest monsoon, and post-monsoon) based on data from the AErosol RObotic NETwork (AERONET) from February 2012 to November 2013. The aerosol distribution patterns in Penang for each monsoonal period were quantitatively identified according to the scattering plots of the Ångström exponent against the AOD. A new empirical algorithm was proposed to predict the AOD data. Ground-based measurements (i.e., visibility and air pollutant index) were used in the model as predictor data to retrieve the missing AOD data from AERONET due to frequent cloud formation in the equatorial region. The model coefficients were determined through multiple regression analysis using selected data set from in situ data. The calibrated model coefficients have a coefficient of determination, R 2 , of 0.72. The predicted AOD of the model was generated based on these calibrated coefficients and compared against the measured data through standard statistical tests, yielding a R 2 of 0.68 as validation accuracy. The error in weighted mean absolute percentage error (wMAPE) was less than 0.40 % compared with the real data. The results revealed that the proposed model efficiently predicted the AOD data. Performance of our model was compared against selected LIDAR data to yield good correspondence. The predicted AOD can enhance measured shortand long-term AOD and provide supplementary information for climatological studies and monitoring aerosol variation.

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“…CALIOP is a sensitive LIDAR that provides high-resolution vertical profiles of aerosols and clouds. CALIOP products can be separated into two levels: (a) level 1 products are composed of calibrated and geolocated profiles of the attenuated backscatter returned signal and (b) level 2 products which are derived from level 1 products and are classified in three types: layer products, profile products, and vertical feature mask [18]. The CALIOP is sensitive to the presence of thin cloud layers and its range resolution of 333 m can identify small boundary layer clouds, especially in the absence of optically thick high clouds where low clouds most dramatically impact the fluxes of shortwave radiation [19].…”

Section: Calipso the Cloud-aerosol Lidar And Infraredmentioning

confidence: 99%

Observation of Clouds Using the CSIR Transportable LIDAR: A Case Study over Durban, South Africa

Shikwambana

Sivakumar

2016

Advances in Meteorology

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The Council for Scientific and Industrial Research (CSIR) transportable Light Detection And Ranging (LIDAR) was used to collect data over Durban (29.9°S, 30.9°E) during 20–23 November 2012. Aerosol measurements have been carried out in the past over Durban; however, no cloud measurements using LIDAR have ever been performed. Therefore, this study further motivates the continuation of LIDAR for atmospheric research over Durban. Low level clouds were observed on 20–22 November 2012 and high level clouds were observed on 23 November 2012. The low level cloud could be classified as stratocumulus clouds, whereas the high level clouds could be classified as cirrus clouds. Low level cloud layers showed high extinction coefficients values ranging between 0.0009 and 0.0044 m−1, whereas low extinction coefficients for high level clouds were observed at values ranging between 0.000001 and 0.000002 m−1. Optical depth showed a high variability for 20 and 21 November 2012. This indicates a change in the composition and/or thickness of the cloud. For 22 and 23 November 2012, almost similar values of optical depth were observed. Cloud-Aerosol LIDAR and Infrared Pathfinder Satellite Observations (CALIPSO) revealed high level clouds while the CSIR LIDAR could not. However, the two instruments complement each other well to describe the cloudy condition.

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Impacts of Biomass Burning in the Atmosphere of the Southeastern Region of Brazil Using Remote Sensing Systems

Cited by 7 publications

References 32 publications

Statistical analysis of the long-range transport of the 2015 Calbuco volcanic plume from ground-based and space-borne observations

Statistical analysis of the long-range transport of the 2015 Calbuco volcanic plume from ground-based and space-borne observations

Monsoonal variations in aerosol optical properties and estimation of aerosol optical depth using ground-based meteorological and air quality data in Peninsular Malaysia

Observation of Clouds Using the CSIR Transportable LIDAR: A Case Study over Durban, South Africa

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