Thompson Annor

• Doctor of Philosophy
• Professor (Associate) at Kwame Nkrumah University of Science and Technology

The response of regional climate models (RCMs) to different input land cover information is complex and uncertain. Several studies by the regional climate modeling community have investigated the potential of land cover data to help understand land-atmosphere interactions at regional and local scales. This study investigates the regional climate re...

Climate model evaluation presents a crucial pathway into the investigation of the simulation of future climate. It presents the only lens through which the future states of the climate of the planet can be explored. In this study, reference datasets including reanalysis products have been used to demonstrate the climatological annual migration of t...

Rainfall data is necessary at resolutions that allow modelling of environmental change and its impact on socio-economic well-being. This is particularly so with agricultural output determination in much of Africa with Ghana not exemption, where data is required for intra and inter-seasonal assessment of the impact of rainfall on yield. However, the...

Assessment of the change in the characteristics of precipitation for more than half a century (1960–2015) is important for determining the extent of climate change on the country Ghana, and more specifically, the Northern Savannah Agro-ecological Zone (NSAZ). This is because the change in the attributes of rainfall has a direct impact on the qualit...

Climate–land interaction over West Africa has often been assessed using climate simulations, although the model-based approach suffers from the limitations of climate models for the region. In this paper, an alternative method based on the analysis of historical land cover data and standardized climatic indices is used to investigate climate–land i...

Climate extremes pose threats to lives and properties. It is therefore critical to assess the dynamics of climate extremes in the future. Knowledge of the appropriate models to be used for projection helps reduces uncertainties in model projections. The study assesses the evolution of 8 extreme temperature indices over the Volta Basin for the 1985–...

The climate and hydrological cycle are influenced by the relationships between land-surface characteristics and the atmosphere. According to this research, a hydrological-atmospheric coupled model adds value to river basin climate modeling by determining if it is useful. The Tono basin in Ghana's Ghana was the focus of the research, which looked at...

Climate models are vital to the assessment of the impacts of climate change in the Central African regions. Establishing how well models reproduce key processes is important to the confidence we attach to these tools. This study examines model representation of the September to November characteristics, such as location and intensity, of the Africa...

The relationship between climate and land use land cover change over West Africa has often been assessed with climate simulations, although the model-based approach suffers from the limitations of climate models specifically for West Africa. In this paper, an alternative approach based on physical analysis of historical land cover data and standard...

Climate extreme events affect people whose livelihoods are reliant on the water resources of the Volta Basin in West Africa. Therefore, decision-makers and policymakers need reliable predictions of these extremes on several time scales to develop an Early Warning System (EWS) to combat the devastating impact of extreme climatic events. In that vein...

The ability of any climate model to reproduce present-day climate fields is very important for the confidence in the projections of the future state of the same fields. It is against this background that the performance of the Global Coupled configuration 2 (GC2) of the Unified Model (UM), a Global Climate Model (GCM), was evaluated over the West A...

Reliable long‐term observations from precipitation stations are often required for climatological studies but are strongly limited in many regions of the world. To improve this limitation for West Africa, we compiled daily and monthly observations from more than 20 national, continental and global databases, to establish a historical precipitation...

Climate change is projected to negatively affect water security which is already a challenge in many areas of Ghana including the Tano river basin (TRB). This study assessed the projections of rainfall and temperature and its impact on streamflow and actual evapotranspiration (ET) in the TRB of Ghana for 2021-2050 relative to the period 1986-2015....

Gold mining is extremely valuable for countries involved in it due to the potential for employment, income allocation and socio-economic development. As a result of the attraction of international investors by governments of countries rich in this natural resource and increasing gold prices, large-scale, small-scale and unlicensed and illegal (Gala...

Study region Pra River Basin, Ghana, West Africa. Study focus In this study, variations of the future streamflow in the Pra River Basin (PRB), are projected using the Soil and Water Analysis Tool (SWAT) model with bias-corrected climate data from regional climate models (RCMs) for the near 21 st century (2010–2039), the mid 21 st century (2040–206...

West Africa (WA) in recent past experienced decreasing rainfall and increasing temperature. A preliminary assessment of these trends in the future (2025-2045) was conducted to evaluate its potential impact on water resources, specifically the Tono irrigation dam in Ghana. The climate change assessment was based on future climate data of Representat...

This DATA addresses the deficiency in the availability of high resolution continous data for research by generating a high resolution (0.250 x 0.250) gridded daily rainfall using the Minimum Surface Curvature (MSC) interpolation for 190 stations distributed across all agro-climatic zones of Ghana. Validation was done using 19 GMet stations (10%) by...

Climate projections for Africa show that the continent may be the second hardest hit by climate change impacts, immediately following polar zones (IPCC, 2007). About 90% 1 of all disasters caused by natural phenomena in sub-Saharan Africa are weather and climate related and their extremes can negatively impact a country’s GDP by 10-20% in the ye...

Here, an evaluation of nine simulations of the regional climate models (RCM) performed within the frame of CORDEX-Africa Project to reproduce the Volta Basin climatology (1971–2005) is presented. Performance metrics of climatological means were computed from annual, seasonal, and monthly total values which detect differences in the spatial and temp...

Climate models provide a key component of climate risk information. However, it is difficult to use climate model output for Africa due to model biases and/or limited understanding of how models represent African regions. Most climate models are developed outside of Africa, whilst many experts in African weather and climate have limited access to...

Here, an evaluation of nine simulations of the regional climate models (RCM) performed within the frame of CORDEX-Africa Project to reproduce the Volta Basin climatology (1971–2005) is presented. Performance metrics of climatological means were computed from annual, seasonal, and monthly total values which detect differences in the spatial and temp...

The unfavorable effect of human disturbances in major river basins resulting in extensive variations in the ecosystem has necessitated this research within the Pra River Basin of Ghana. Knowledge about how individual land use influences water balance components will massively improve natural resources planning, management and sustainable developmen...

Solar radiation is an important geological and meteorological parameter. In most developing countries, data is readily unavailable owing to lack of instrumentation and skilled personnel. In this study, Global solar radiation (GSR) over Ghana has been quantified using the Ångström–Prescott sunshine model with sunshine duration data from 22 synoptic...

Solar radiation is an important geological and meteorological parameter. In most developing countries, data is readily unavailable owing to lack of instrumentation and skilled personnel. In this study, Global solar radiation (GSR) over Ghana has been quantified using the Ångström–Prescott sunshine model with sunshine duration data from 22 synoptic...

This study examined the trends in annual rainfall and temperature extremes over the Vea catchment for the period 1985-2016, using quality-controlled stations and a high resolution (5 km) Climate Hazards Group InfraRed Precipitation with Station (CHIRPS) data. The CHIRPS gridded precipitation data's ability in reproducing the climatology of the catc...

A 26-year simulation (1980–2005) was performed with the Weather Research and Forecast (WRF) model over the Volta Basin in West Africa. This was to investigate the ability of a climate version of WRF to reproduce present day temperature and precipitation over the Volta Basin. The ERA-Interim reanalysis and one realization of the ECHAM6 global circul...

A selected number of global climate models (GCMs) from the fifth Coupled Model Intercomparison Project (CMIP5) were evaluated over the Volta Basin for precipitation. Biases in models were computed by taking the differences between the averages over the period (1950–2004) of the models and the observation, normalized by the average of the observed f...

This study used the Double Cumulative Curve (DCC) and visual image interpretation methods for the selection of spatio‐temporal Landsat data to evaluate the land degradation by anthropogenic activities in the Pra River Basin (PRB) of Ghana. Unsupervised and supervised classification procedures were used to map the Land Use/Land Cover (LULC) distribu...

Seasonal predictions of precipitation, among others, are important to help mitigate the effects of drought and floods on agriculture, hydropower generation, disasters, and many more. This work seeks to obtain a suitable combination of physics schemes of the Weather Research and Forecasting (WRF) model for seasonal precipitation simulation over Ghan...

The Lower Pra River Basin (LPRB), located in the forest zone of southern Ghana has experienced changes due to variability in precipitation and diverse anthropogenic activities. Therefore, to maintain the functions of the ecosystem for water resources management, planning and sustainable development, it is important to differentiate the impacts of p...

Rainfall variability has strong impact on food security, livelihood and socioeconomic activities as farming in West Africa is mainly rain-fed. The annual, seasonal and decadal rainfall variability over Ghana has been studied and their periodicities analysed using wavelet analysis. A rainfall time series from 1901–2010 from the Global Precipitation...

Rainfall variability has strong impact on food security, livelihood and socioeconomic activities as farming in West Africa is mainly rain-fed. The annual, seasonal and decadal rainfall variability over Ghana has been studied and their periodicities analysed using wavelet analysis. A rainfall time series from 1901–2010 from the Global Precipitation...

To understand surface energy exchange processes over the semiarid regions in West Africa, numerical simulations of surface energy and water balances were carried out using a one-dimensional multilayer atmosphere-SOil-VEGetation (SOLVEG) model for selected days of the dry and rainy seasons over a savanna grassland ecosystem in Sumbrungu in the Upper...

WADI

Many disciplines in climate studies need meteorological information at locations where measurements are often not available. To overcome this basic problem, a common way is to use spatial interpolation techniques for transferring the information from measurement sites to a location of interest. Since the performance of an interpolation technique st...

Species like nitrate (NO3−), hydrogen peroxide (H2O2), and formaldehyde (HCHO) are ubiquitous trace compounds in snow. Photochemical reactions of these compounds in the snow can have important implications for the composition of the atmospheric boundary layer in snow-covered regions and for the interpretation of concentration profiles in snow and i...