scholarly journals Atmospheric aerosols in Amazonia and land use change: from natural biogenic to biomass burning conditions

2013 ◽  
Vol 165 ◽  
pp. 203 ◽  
Author(s):  
Paulo Artaxo ◽  
Luciana V. Rizzo ◽  
Joel F. Brito ◽  
Henrique M. J. Barbosa ◽  
Andrea Arana ◽  
...  
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Biomass Burning ◽  
Atmospheric Aerosols

scholarly journals Spatial variability of the direct radiative forcing of biomass burning aerosols and the effects of land use change in Amazonia

2013 ◽  
Vol 13 (3) ◽  
pp. 1261-1275 ◽  
Author(s):  
E. T. Sena ◽  
P. Artaxo ◽  
A. L. Correia
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Water Vapour ◽  
Biomass Burning ◽  
Radiative Forcing ◽  
Surface Albedo ◽  
Water Vapour Content ◽  
Direct Radiative Forcing ◽  
The Mean ◽  
The Impact

Abstract. This paper addresses the Amazonian shortwave radiative budget over cloud-free conditions after considering three aspects of deforestation: (i) the emission of aerosols from biomass burning due to forest fires; (ii) changes in surface albedo after deforestation; and (iii) modifications in the column water vapour amount over deforested areas. Simultaneous Clouds and the Earth's Radiant Energy System (CERES) shortwave fluxes and aerosol optical depth (AOD) retrievals from the Moderate Resolution Imaging SpectroRadiometer (MODIS) were analysed during the peak of the biomass burning seasons (August and September) from 2000 to 2009. A discrete-ordinate radiative transfer (DISORT) code was used to extend instantaneous remote sensing radiative forcing assessments into 24-h averages. The mean direct radiative forcing of aerosols at the top of the atmosphere (TOA) during the biomass burning season for the 10-yr studied period was −5.6 ± 1.7 W m−2. Furthermore, the spatial distribution of the direct radiative forcing of aerosols over Amazonia was obtained for the biomass burning season of each year. It was observed that for high AOD (larger than 1 at 550 nm) the maximum daily direct aerosol radiative forcing at the TOA may be as high as −20 W m−2 locally. The surface reflectance plays a major role in the aerosol direct radiative effect. The study of the effects of biomass burning aerosols over different surface types shows that the direct radiative forcing is systematically more negative over forest than over savannah-like covered areas. Values of −15.7 ± 2.4 W m−2τ550 nm and −9.3 ± 1.7 W m−2τ550 nm were calculated for the mean daily aerosol forcing efficiencies over forest and savannah-like vegetation respectively. The overall mean annual land use change radiative forcing due to deforestation over the state of Rondônia, Brazil, was determined as −7.3 ± 0.9 W m−2. Biomass burning aerosols impact the radiative budget for approximately two months per year, whereas the surface albedo impact is observed throughout the year. Because of this difference, the estimated impact in the Amazonian annual radiative budget due to surface albedo-change is approximately 6 times higher than the impact due to aerosol emissions. The influence of atmospheric water vapour content in the radiative budget was also studied using AERONET column water vapour. It was observed that column water vapour is on average smaller by about 0.35 cm (around 10% of the total column water vapour) over deforested areas compared to forested areas. Our results indicate that this drying contributes to an increase in the shortwave radiative forcing, which varies from 0.4 W m−2 to 1.2 W m−2 depending on the column water vapour content before deforestation. The large radiative forcing values presented in this study point out that deforestation could have strong implications in convection, cloud development and the ratio of direct to diffuse radiation, which impacts carbon uptake by the forest.

scholarly journals Impacts of biomass burning emissions and land use change on Amazonian atmospheric phosphorus cycling and deposition

2005 ◽  
Vol 19 (4) ◽  
pp. n/a-n/a ◽  
Author(s):  
Natalie M. Mahowald ◽  
Paulo Artaxo ◽  
Alex R. Baker ◽  
Timothy D. Jickells ◽  
Gregory S. Okin ◽  
...  
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Biomass Burning ◽  
Phosphorus Cycling

Fuel characteristics and emissions from biomass burning and land-use change in Nigeria

1995 ◽  
Vol 38-38 (2-3) ◽  
pp. 279-289 ◽  
Author(s):  
A. O. Isichei ◽  
J. I. Muoghalu ◽  
F. A. Akeredolu ◽  
O. A. Afolabi
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Biomass Burning ◽  
Fuel Characteristics

Effect of dramatic land use change on gaseous pollutant emissions from biomass burning in Northeastern China

2015 ◽  
Vol 153 ◽  
pp. 429-436 ◽  
Author(s):  
Hongmei Zhao ◽  
Daniel Q. Tong ◽  
Chuanyu Gao ◽  
Guoping Wang
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Biomass Burning ◽  
Northeastern China ◽  
Pollutant Emissions ◽  
Gaseous Pollutant

Evaluation of spatially explicit emission scenario of land-use change and biomass burning using a process-based biogeochemical model

2013 ◽  
Vol 8 (1) ◽  
pp. 104-122 ◽  
Author(s):  
Etsushi Kato ◽  
Tsuguki Kinoshita ◽  
Akihiko Ito ◽  
Michio Kawamiya ◽  
Yoshiki Yamagata
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Biomass Burning ◽  
Emission Scenario ◽  
Spatially Explicit ◽  
Biogeochemical Model

Assessment of land-use change in coastal areas through geographical information systems

2020 ◽  
Vol 13 (10) ◽  
Author(s):  
Verónica Lango-Reynoso ◽  
Karla Teresa González-Figueroa ◽  
Fabiola Lango-Reynoso ◽  
María del Refugio Castañeda-Chávez ◽  
Jesús Montoya-Mendoza
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Geographical Information Systems ◽  
Design Methodology ◽  
Scientific Information ◽  
Coastal Ecosystems ◽  
Coastal Areas ◽  
Geographical Information ◽  
Coastal Zones ◽  
Computer Based

Objective: This article describes and analyzes the main concepts of coastal ecosystems, these as a result of research concerning land-use change assessments in coastal areas. Design/Methodology/Approach: Scientific articles were searched using keywords in English and Spanish. Articles regarding land-use change assessment in coastal areas were selected, discarding those that although being on coastal zones and geographic and soil identification did not use Geographic Information System (GIS). Results: A GIS is a computer-based tool for evaluating the land-use change in coastal areas by quantifying variations. It is analyzed through GIS and its contributions; highlighting its importance and constant monitoring. Limitations of the study/Implications: This research analyzes national and international scientific information, published from 2007 to 2019, regarding the land-use change in coastal areas quantified with the digital GIS tool. Findings/Conclusions: GIS are useful tools in the identification and quantitative evaluation of changes in land-use in coastal ecosystems; which require constant evaluation due to their high dynamism.

Monitoring land use change in the Lake Taupo catchment between 1975, 1990 and 2002 using satellite remote sensing data

2007 ◽  
pp. 17-22
Author(s):  
H. Lilienthal ◽  
A. Brauer ◽  
K. Betteridge ◽  
E. Schnug
Keyword(s):  
Remote Sensing ◽  
Water Quality ◽  
Land Use ◽  
Land Use Change ◽  
Satellite Remote Sensing ◽  
Remote Sensing Data ◽  
Native Vegetation ◽  
Lake Water Quality ◽  
Livestock Farming ◽  
Slow Decline

Conversion of native vegetation into farmed grassland in the Lake Taupo catchment commenced in the late 1950s. The lake's iconic value is being threatened by the slow decline in lake water quality that has become apparent since the 1970s. Keywords: satellite remote sensing, nitrate leaching, land use change, livestock farming, land management

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