Gizaw Mengistu Tsidu
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View article: Assessment of Historical and Future Mean and Extreme Precipitation Over Sub‐Saharan Africa Using <scp>NEX</scp> ‐ <scp>GDDP</scp> ‐ <scp>CMIP6</scp> : Part <scp>II</scp> —Future Changes
Assessment of Historical and Future Mean and Extreme Precipitation Over Sub‐Saharan Africa Using <span>NEX</span> ‐ <span>GDDP</span> ‐ <span>CMIP6</span> : Part <span>II</span> —Future Changes Open
This study utilised a multi‐model ensemble (MME) of 26 NASA Earth Exchange Global Daily Downscaled Projections (NEX‐GDDP) to assess future changes in mean and extreme precipitation over sub‐Saharan Africa at both seasonal and annual scales…
View article: Observational Evidence of Distinct Excitation Pathways for Migrating and Non-Migrating Tides in the Mesosphere-Lower Thermosphere During the 2021 Sudden Stratospheric Warming
Observational Evidence of Distinct Excitation Pathways for Migrating and Non-Migrating Tides in the Mesosphere-Lower Thermosphere During the 2021 Sudden Stratospheric Warming Open
We investigate the excitation and variability of migrating and non-migrating diurnal and semi-diurnal tides in the mesosphere and lower thermosphere (MLT) during the 2021 Northern Hemisphere sudden stratospheric warming (SSW). Zonal wind d…
View article: Challenging global generalizations: superior land cover mapping in Botswana with a locally trained transformer model
Challenging global generalizations: superior land cover mapping in Botswana with a locally trained transformer model Open
Introduction Accurate and high‐resolution land use and land cover (LULC) classification remains a critical challenge in ecologically diverse and spatially heterogeneous dryland environments, particularly in data-scarce regions. Botswana, w…
View article: Short-term impacts of wildfire on vegetation recovery, soil chemical properties and community-level physiological profiling in a savanna ecosystem of Botswana
Short-term impacts of wildfire on vegetation recovery, soil chemical properties and community-level physiological profiling in a savanna ecosystem of Botswana Open
Introduction Savanna ecosystems, an important contributor to Botswana’s economy and occupy up to 86 percent of the land mass of Botswana serving as habitat for wildlife and livestock that are being affected by frequent wildfire which are a…
View article: Effective Control Strategies for Sex-Structured Transmission Dynamics of Visceral Leishmaniasis
Effective Control Strategies for Sex-Structured Transmission Dynamics of Visceral Leishmaniasis Open
Visceral leishmaniasis (VL), a chronic disease caused by Leishmania infantum, is more prevalent in males than females. Control strategies that do not take this disparity into account can be suboptimal. We extended a sex-structured VL model…
View article: Assessing Non-Ideal Instrumental Effects in High-Resolution FTIR Spectroscopy: Instrument Performance Characterization
Assessing Non-Ideal Instrumental Effects in High-Resolution FTIR Spectroscopy: Instrument Performance Characterization Open
This study investigates the impact of non-ideal instrumental effects on the performance of high-resolution Fourier Transform Infrared (FTIR) spectrometers, with a focus on the Bruker FTS 120M. Key non-idealities, including retroreflector m…
View article: Hydrological Modelling and Multisite Calibration of the Okavango River Basin: Addressing Catchment Heterogeneity and Climate Variability
Hydrological Modelling and Multisite Calibration of the Okavango River Basin: Addressing Catchment Heterogeneity and Climate Variability Open
The Okavango River is a transboundary waterway that flows through Angola, Namibia, and Botswana, forming a significant alluvial fan in northwestern Botswana. This fan creates a Delta that plays a vital role in the country’s GDP through tou…
View article: Improving Daily CMIP6 Precipitation in Southern Africa Through Bias Correction—Part 1: Spatiotemporal Characteristics
Improving Daily CMIP6 Precipitation in Southern Africa Through Bias Correction—Part 1: Spatiotemporal Characteristics Open
Impact models used in water, ecology, and agriculture require accurate climatic data to simulate observed impacts. Some of these models emphasize the distribution of precipitation within a month or season rather than the overall amount. To…
View article: Improving Daily CMIP6 Precipitation in Southern Africa Through Bias Correction— Part 2: Representation of Extreme Precipitation
Improving Daily CMIP6 Precipitation in Southern Africa Through Bias Correction— Part 2: Representation of Extreme Precipitation Open
Accurate simulation of extreme precipitation events is crucial for managing climate-vulnerable sectors in Southern Africa, as such events directly impact agriculture, water resources, and disaster preparedness. However, global climate mode…
View article: Effective Control Strategies for Sex-Structured Transmission Dynamics of Visceral Leishmaniasis
Effective Control Strategies for Sex-Structured Transmission Dynamics of Visceral Leishmaniasis Open
Visceral Leishmaniasis (VL), a chronic disease caused by Leishmania infantum is more prevalent in men. Control strategies that do not take this disparity into account can be sub-optimal. We extended a sex-structured VL model by introducing…
View article: Understanding the Impacts of Rainfall Variability on Natural Forage–Livestock Dynamics in Arid and Semi-Arid Environments
Understanding the Impacts of Rainfall Variability on Natural Forage–Livestock Dynamics in Arid and Semi-Arid Environments Open
Arid and semi-arid environments are characterized by highly variable and unpredictable rainfall patterns, which significantly affect the structure and function of natural ecosystems. Understanding the interconnected relationship between cl…
View article: The Structure and Function of Yemsa Adverbial Clauses: Empirical Study
The Structure and Function of Yemsa Adverbial Clauses: Empirical Study Open
Yemsa, an Omotic language spoken in Ethiopia, has received limited attention in linguistic research, particularly with regard to its adverbial clauses. The lack of a comprehensive description of Yemsa’s adverbial clauses hinders our unders…
View article: Conditional Constructions in Yemsa
Conditional Constructions in Yemsa Open
Introduction . The main objective of this study is to produce a comprehensive description of Yemsa conditional constructions. The existing studies do not describe conditional clauses in Yemsa. This study aims to fill the gap in the descrip…
View article: Optimized Parameter Estimation and Integrating Neural Network Forecasting of Dynamic Plant-Livestock Model for Early Warning in Agro-Environment Control Systems
Optimized Parameter Estimation and Integrating Neural Network Forecasting of Dynamic Plant-Livestock Model for Early Warning in Agro-Environment Control Systems Open
The research utilizes the Lotka-Volterra prey-predator model to study Plant-Herbivore dynamics, focusing on the relationship between traditional livestock farming and vegetation conditions. Advanced methods are developed to improve the pre…
View article: The Structure and Typology of Yemsa Relative Clauses: An Empirical Study
The Structure and Typology of Yemsa Relative Clauses: An Empirical Study Open
This study explores the internal structure of relative clauses in Yemsa, an area yet to be examined in existing literature. The research aims to address this gap by answering the following questions: What is the internal structure of the Y…
View article: Impacts of Wildlife Artificial Water Provisioning in an African Savannah Ecosystem: A Spatiotemporal Analysis
Impacts of Wildlife Artificial Water Provisioning in an African Savannah Ecosystem: A Spatiotemporal Analysis Open
The use of artificial water points for wildlife in African savannah ecosystems has been widely criticised for affecting the distribution of wildlife and initiating changes in the heterogeneity of natural landscapes. We examined the spatiot…
View article: Sex-structured disease transmission model and control mechanisms for visceral leishmaniasis (VL)
Sex-structured disease transmission model and control mechanisms for visceral leishmaniasis (VL) Open
Background Leishmaniasis are a group of diseases caused by more than 20 species of the protozoan that are transmitted through the bite of female sand fly. The disease is endemic to 98 countries of the world. It affects most commonly the po…
View article: Exploring the Influence of Improved Horizontal Resolution on Extreme Precipitation in Southern Africa Major River Basins: Insights from CMIP6 HighResMIP Simulations
Exploring the Influence of Improved Horizontal Resolution on Extreme Precipitation in Southern Africa Major River Basins: Insights from CMIP6 HighResMIP Simulations Open
This study examines the impact of enhanced horizontal resolution on simulating mean and precipitation extremes in the major river basins of southern Africa. Seven global climate models (GCMs) from the High-Resolution Model Intercomparison …
View article: Land Use and Land Cover Change Modulates Hydrological Flows and Water Supply to Gaborone Dam Catchment, Botswana
Land Use and Land Cover Change Modulates Hydrological Flows and Water Supply to Gaborone Dam Catchment, Botswana Open
Identifying the mechanism through which changes in land use and land cover (LULC) modulate hydrological flows is vital for water resource planning and management. To examine the impact of LULC change on the hydrology of the Gaborone Dam ca…
View article: Spatio-temporal variability of rainfall and temperature extremes over Southern Africa
Spatio-temporal variability of rainfall and temperature extremes over Southern Africa Open
Climate change can be reflected in terms of  shift in mean climatology as well as shift in the distribution of rainfall and temperature extremes over time. Southern Africa has distinct climate regimes that includes arid and semi-arid …
View article: Dryland land crop yield sensitivity to drought in Botswana: Development ofstatistical tools based on satellite remote sensing, observation and climate models foruse in risk assessment
Dryland land crop yield sensitivity to drought in Botswana: Development ofstatistical tools based on satellite remote sensing, observation and climate models foruse in risk assessment Open
Assessing agricultural drought is of great importance as it is viewed as the most serious problem in mostcountries in terms of food security, economy, and social stability. Various drought indices have beendeveloped in order to describe th…
View article: Spatiotemporal Variability of the Lake Tana Water Quality Derived from the MODIS-Based Forel–Ule Index: The Roles of Hydrometeorological and Surface Processes
Spatiotemporal Variability of the Lake Tana Water Quality Derived from the MODIS-Based Forel–Ule Index: The Roles of Hydrometeorological and Surface Processes Open
Lake Tana, the largest inland water body in Ethiopia, has witnessed significant changes due to ongoing urbanization and socioeconomic activities in recent times. In this study, the two-decade recordings of moderate resolution imaging spect…
View article: How good are recent satellite based sensors and models for monitoring of air quality in Africa
How good are recent satellite based sensors and models for monitoring of air quality in Africa Open
<p>Satellite observations have become one of the critical tools employed for Earth Observations. The change in tropospheric and stratospheric composition is routinely monitored with improved accuracy using satellite-based sensors in …
View article: Spatiotemporal characteristics of current and projected rainfalls over East Africa: Insights from precipitation concentration and standardized precipitation indices
Spatiotemporal characteristics of current and projected rainfalls over East Africa: Insights from precipitation concentration and standardized precipitation indices Open
This study has used monthly rainfalls from Regional Climate Models (RCMs) experiments conducted in the frame work of the COrdinated Regional Downscaled EXperiment (CORDEX) project for historical and future periods. The deriving General Cli…
View article: Improved calibration procedures for the EM27/SUN spectrometers of the COllaborative Carbon Column Observing Network (COCCON)
Improved calibration procedures for the EM27/SUN spectrometers of the COllaborative Carbon Column Observing Network (COCCON) Open
In this study, an extension on the previously reported status of the COllaborative Carbon Column Observing Network's (COCCON) calibration procedures incorporating refined methods is presented. COCCON is a global network of portable Bruker …