African Biomass Burning and Its Atmospheric Impacts

2020 ◽  
Author(s):  
Charles Ichoku
Keyword(s):  
Biomass Burning ◽  
Agricultural Land ◽  
Water Cycle ◽  
Winter Season ◽  
Satellite Observations ◽  
Sub Saharan Africa ◽  
Atmospheric Composition ◽  
Research Activities ◽  
Sub Saharan ◽  
Annual Distribution

Biomass burning is widespread in sub-Saharan Africa, which harbors more than half of global biomass burning activity. These African open fires are mostly induced by humans for various purposes, ranging from agricultural land clearing and residue burning to deforestation. They affect a wide variety of land ecosystems, including forests, woodlands, shrublands, savannas, grasslands, and croplands. Satellite observations show that fires are distributed almost equally between the northern and southern hemispheres of sub-Saharan Africa, with a dipole-type annual distribution pattern, peaking during the dry (winter) season of either hemisphere. The widespread nature of African biomass burning and the tremendous amounts of particulate and gas-phase emissions the fires produce have been shown to affect a variety of processes that ultimately impact the earth’s atmospheric composition and chemistry, air quality, water cycle, and climate in a significant manner. However, there is still a high level of uncertainty in the quantitative characterization of biomass burning, and its emissions and impacts in Africa and globally. These uncertainties can be potentially alleviated through improvements in the spatial and temporal resolutions of satellite observations, numerical modeling and data assimilation, complemented by occasional field campaigns. In addition, there is great need for the general public, policy makers, and funding organizations within Africa to recognize the seriousness of uncontrolled biomass burning and its potential consequences, in order to bring the necessary human and financial resources to bear on essential policies and scientific research activities that can effectively address the threats posed by the combined adverse influences of the changing climate, biomass burning, and other environmental challenges in sub-Saharan Africa.

scholarly journals Conservation research output in sub-Saharan Africa is increasing, but only in a few countries

Oryx ◽  
2020 ◽  
pp. 1-10
Author(s):  
P. Christy Pototsky ◽  
Will Cresswell
Keyword(s):  
South African ◽  
Agricultural Land ◽  
Research Output ◽  
Sub Saharan Africa ◽  
Search Term ◽  
African Countries ◽  
Research Papers ◽  
North American Country ◽  
Conservation Research ◽  
Sub Saharan

Abstract We tested if peer-reviewed conservation research output has increased in sub-Saharan African countries over the last 30 years in response to increased development. We carried out a bibliometric analysis to identify the number of conservation research papers published by national authors of 41 sub-Saharan African countries during 1987–2017, to provide an index of national conservation research output. We identified country-specific development factors influencing these totals, using general linear modelling. There were positive relationships between conservation research output and population size, GDP, literacy rate, international tourism receipts and population growth rate, and negative relationships with urban population and agricultural land cover, in total explaining 77% of variation. Thirty-eight per cent of countries contributed < 30 conservation research papers (of 12,701) in 30 years. Analysis of trends in primary authorship in a random subsample of 2,374 of these papers showed that primary authorship by sub-Saharan African authors has increased significantly over time but is now at a lower rate than primary authorship for authors from countries outside the country associated with the search term, usually a European or North American country. Overall, 46% of papers had national primary authors, but 67% of these were South African. The results show that conservation research output in sub-Saharan Africa overall is increasing but only significantly in a few countries, and is still dominated by non-national scientists, probably as a result of a lack of socio-economic development.

scholarly journals Land Use, Environmental, and Food Consumption Patterns in Sub-Saharan Africa, 2000–2015: A Review

2021 ◽  
Vol 13 (15) ◽  
pp. 8200
Author(s):  
Jeffrey Chiwuikem Chiaka ◽  
Lin Zhen
Keyword(s):  
Land Use ◽  
Food Supply ◽  
Agricultural Land ◽  
Land Use Changes ◽  
Sub Saharan Africa ◽  
The Sustainable Development ◽  
Sparse Vegetation ◽  
Local Methods ◽  
Development Goals ◽  
Sub Saharan

Sub-Saharan Africa (SSA) land use changes are primarily influenced by agriculture and its population. The region faces various challenges ranging from rainfall variabilities to poverty and insecurities, which further hampered food supply and production. The spatial analysis identified six land uses—agriculture, forest, grassland, wetland, urban, and others (i.e., bare land, water, and sparse vegetation), showing relative percentage changes. Additionally, information collected and analyzed shows that the Millennium Development Goals period witnessed increased agricultural land use changes in the environment to improve food supply, and farmers adopted local methods and native experiences to mitigate environmental particularities facing the region. Farmers’ landholdings are fragmented, and food supply per capita is low albeit rich in calories, and nutrition is still unbalanced, while bushmeat consumption is popular and serves as an alternative to animal-sourced protein. Concerted efforts should be made to improve food security and edge closer to the sustainable development goal during this decade.

Food price volatilities and civilian victimization in Africa

2017 ◽  
Vol 37 (2) ◽  
pp. 193-214
Author(s):  
Babak Rezaeedaryakenari ◽  
Steven T. Landis ◽  
Cameron G. Thies
Keyword(s):  
Food Insecurity ◽  
Agricultural Land ◽  
Subsequent Treatment ◽  
Food Price ◽  
Sub Saharan Africa ◽  
Rebel Groups ◽  
Human Rights Organizations ◽  
Violence Against Civilians ◽  
Sub Saharan ◽  
The Impact

This paper studies the impact of food insecurity on civilian–rebel interactions. We argue that food price volatilities affect the incentives of insurgent groups and their subsequent treatment of civilians. The hypotheses developed in this study are empirically evaluated across a battery of statistical models using monthly data from a sample of 112 first administrative districts in sub-Saharan Africa. The results show that increases in food insecurity substantially raise the likelihood of insurgent groups committing violence against civilians and that districts with a higher proportion of agricultural land are at greatest risk of civilian victimization by rebel groups during these episodes of food insecurity. The implications of this analysis suggest that the human impact of food insecurity does not simply relate to nutrition and questions of governance. Food price volatilities also incentivize the use of violence against civilians by non-state actors, which is a pertinent concern of human rights organizations and policymakers.

scholarly journals An intersectional gender analysis of familial and socio-cultural drivers of inequitable scientific career progression of researchers in Sub-Saharan Africa

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Millicent L. Liani ◽  
Isaac K. Nyamongo ◽  
Justin Pulford ◽  
Rachel Tolhurst
Keyword(s):  
Scientific Research ◽  
Research Capacity ◽  
Career Progression ◽  
Sub Saharan Africa ◽  
Gender Analysis ◽  
Scientific Career ◽  
Capacity Strengthening ◽  
Research Activities ◽  
Research Capacity Strengthening ◽  
Sub Saharan

Abstract Background Sub-Saharan Africa (SSA) suffers from a dearth of concrete information on the causes of women’s under-representation in scientific research workforce particularly at higher levels compared with the wealth of information that exists in the global north. The goal of this study was to illuminate familial and socio-cultural drivers that contribute to intersectional gender inequities in scientific career progression in SSA to inform strategies that could promote career equity for African scientific researchers. Methods This study was nested within the context of ‘Developing Excellence in Leadership, Training and Science in Africa’ (DELTAS Africa)—a health-based scientific research capacity strengthening initiative. It adopted an exploratory qualitative cross-sectional study design. In-depth interviews were conducted among 58 (32 Female and 26 Male) trainees/research fellows at various career stages, affiliated to three purposively selected African Research Consortia. The interviews were conducted between May and December 2018 in English. The data were analysed inductively based on emergent themes. Results The study participants were nationals of thirteen SSA countries. More female than male participants had young children. Four themes were identified. They illustrate women’s and men’s characterisation of the normative career pathway and progression requirements which calls for significant ‘time’ commitments (theme 1), and how social power relations of gender within the family and wider society shapes their participation in scientific research activities (theme 2). This culminates in researchers'' differential experiences of navigating between the ‘two different lives’—family and career, and the resultant implications for their career progression and personal well-being (theme 3). Women researchers made different and conscious trade-offs for navigating the ‘two different lives’ by utilising various metaphors such as the ‘biological clock and career clock’, the ‘glass ball and rubber ball’, and the concept of ‘sacrifice’ (theme 4). Conclusions This study is the first of its kind to demonstrate how intersectional gender analysis through use of qualitative research methods may provide novel insights into the hidden familial and socio-cultural drivers of gender inequitable scientific research career progression. It offers important policy and practice measures and approaches for fostering career equity for women and men scientists within research capacity strengthening initiatives in SSA.

scholarly journals Construction and Characterization of an Indoor Smog Chamber for the Measurement of the Optical and Physicochemical Properties of Aging Biomass Burning Aerosols Native to sub-Saharan Africa

2018 ◽  
Author(s):  
Damon M. Smith ◽  
Marc N. Fiddler ◽  
Kenneth G. Sexton ◽  
Solomon Bililign
Keyword(s):  
Size Distribution ◽  
Deposition Rate ◽  
Biomass Burning ◽  
Sub Saharan Africa ◽  
Smog Chamber ◽  
Analytical Instruments ◽  
Wall Loss ◽  
Sub Saharan ◽  
Loss Rates

Abstract. We describe here the construction and characterization of a new smog chamber facility (NCAT chamber) for studying the chemical and optical properties of biomass burning (BB) aerosols from biomass fuels native to sub-Saharan Africa. This facility is comprised of a ~9 m3 fluorinated ethylene propylene film (FEP) reactor placed in a temperature-controlled room and coupled with a cavity ring-down spectrometer, nephelometer, condensation particle counter, differential mobility analyzer and other analytical instruments, such as NOX and O3 analyzers, a GC, a filter sampler, and an impinger for collecting particles in water. Construction details and characterization experiments are described, including measurements of BB particulate size distribution and deposition rate, gas wall loss rates, dilution rate, light intensity, mixing speed, temperature and humidity variations, and air purification method. The wall loss rates for NO, NO2, and O3 were found to be (7.40 ± 0.01) × 10−4, (3.47 ± 0.01) × 10−4, and (5.90 ± 0.08) × 10−4 min−1 respectively. The NO2 photolysis rate constant was 0.165 ±0.005 min−4, which corresponds to a flux of (7.72 ± 0.25) × 1017 photons•nm•cm−2•s−1 from 296.0−516.8 nm. Particle deposition rate was found to be (2.46 ± 0.11) × 10−3 min−1 for pine at Dp = 100 nm. After initial mixing in the chamber, with the ultraviolet (UV) light off, the particle size distribution for BB samples used for the initial work did not stabilize until ~7.5 hours after injection peaking near a mobility diameter of ~340 nm. The chamber demonstrated gas and particle loss rates, and other properties comparable to other similar indoor smog chambers.

Managing Foreign Investment in Agricultural Land in Africa: The Role of Bilateral Investment Treaties and International Investment Contracts

2014 ◽  
Vol 7 (2) ◽  
Author(s):  
Uche Ewelukwa Ofodile
Keyword(s):  
Agricultural Land ◽  
Policy Instruments ◽  
International Investment ◽  
Sub Saharan Africa ◽  
Bilateral Investment Treaties ◽  
International Investment Law ◽  
Human Rights Regime ◽  
Investment Treaties ◽  
Sub Saharan

AbstractThis paper seeks answers to three questions. What are the trends in terms of the role of bilateral investment treaties (BITs) and land contracts in addressing complex environmental, social and governance issues implicated in foreign direct investment in agricultural land (agro-FDI)? Are countries in sub-Saharan Africa (SSA) effectively using these two policy instruments to maximize the benefits of agro-FDI and to minimize associated risks and dangers? Do countries in SSA appreciate and are they effectively managing the complex interactions between international investment law, as encapsulated in BITs, and other regimes of international law, particularly the international human rights regime?

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