Ayansina Ayanlade

Obafemi Awolowo University | OAU · Department of Geography

COVID-19 pandemic movement restrictions as part of the control measures put in place by countries in Sub-Saharan Africa (SSA) has implications on food security, as movement restrictions coincided with planting periods for most of the staple crops. The measures are affecting important staple crops in SSA, and are likely to exacerbate food security c...

It is often difficult to define the relationship and the influence of climate on the occurrence and distribution of disease. To examine this issue, the effects of climate indices on the distributions of malaria and meningitis in Nigeria were assessed over space and time. The main purpose of the study was to evaluate the relationships between climat...

This study aims at assessing variations and changes in the intensity of urban land surface temperature (LST) over four major cities in different ecological zone. The study intends to examine the contributions of different land cover types and variation in ecological locations on the intensity of urban LST. Remote Sensing and GIS techniques were use...

Background Cultivated lands in the vicinity of industry are vulnerable due to trace element releases from industrial activities. One such situation concerns the surrounding of the largest cement-manufacturing plant in sub-Saharan Africa, located in Obajana, Nigeria. Objective This study aimed at examining the trace element concentrations in the so...

This article explains the assessment and conceptual framing of the Vulnerability Synthesis in the Africa chapter of the Intergovernmental Panel on Climate Change’s (IPCC) 6th Assessment Report (AR6), situating the synthesis within emerging understandings of complex climate change risk, intersectionality and multi-dimensional vulnerability. It highl...

In this study, the impacts of climate variability/change on water supply in three urban sprawl communities were examined. Using historical satellite climate datasets and social surveys, the study assesses the water stress during different seasons in urban sprawl communities. The primary data was gathered through structured questionnaires and focuse...

This paper assessed the expansion of land use and land cover that occurred in Oyo State, Southwestern Nigeria, over a period of thirty-year. This was to assess urban expansion, landuse dynamics and their effects on land surface temperature in the area. The study used four multi-date imageries of the area. Landsat 7 ETM + , 1990, 2000, 2012, and Lan...

Crops in Sub-Saharan African countries are generally more vulnerable to climate change with considerable impacts on yields. In this study, the impacts of climate change on selected root crops, cereals and vegetables were examined with the practice of adaptation as well as barriers hindering the adoption of selected adaptation options in selected fa...

Climate change and extreme weather events have led to multi-vulnerabilities worldwide, particularly in many African countries where recent severe droughts, floods, and intra-seasonal dry spells have impacted smallholder farming productivity. This chapter examines crop and livestock smallholder farmers’ sensitivities to climate change and their adap...

Food security has continued to be a global concern despite progress in the international agenda to reduce food insecurity over the last decades. A considerable number of populations are facing difficulties in dealing with hunger globally. Ethiopia is among the countries that face persistent challenges to achieving food security. However, the subjec...

Background Return migration, the process of migrants returning to their countries of origin, is a vital aspect of migration that has received growing attention in recent years. One area of focus in the study of return migration is understanding the motivations that drive migrants to return home. Conducting a regional literature review on the dynami...

This study assesses the literature evidence on climate change risk, resilience, and adaptation measures used among rural farmers in East Africa. A systematic literature review was conducted comprising 30 papers from the Web of Science database published during 2000–2022. The results of the literature review showed that climate change risks have dir...

Climate change impact has no global and gender boundary, yet how gender norms mediate crop farmers' responsive approaches to rapid climate warming received little attention. Men and women crop smallholder farmers in Nasarawa state experience the impacts of rapid climate warming differently. This study examines the gender-responsive approaches to ra...

Food insecurity continues to be a major international concern aggravated by the economic crisis, pandemics, violent conflicts and war. In the past decade, scholars have highlighted the role of migration in household food security, yet the interrelationships between migration and food security have shown disconnections in the literature. This study...

This Cross-Chapter Box highlights the intersecting issues of gender, climate change adaptation, climate justice and transformative pathways. A gender perspective does not centre only on women or men but examines structures, processes and relationships of power between and among groups of men and women and how gender, particularly in its non-binary...

Indigenous knowledge refers to the understandings, skills and philosophies developed by societies with long histories of interaction with their natural surroundings (UNESCO, 2018; IPCC, 2019a). Local knowledge refers to the understandings and skills developed by individuals and populations, specific to the places where they live (UNESCO, 2018; IPCC...

The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), which causes COVID-19, emerged in late 2019, halfway through the preparation of the IPCC WGII Sixth Assessment Report. This Cross-Chapter Box assesses how the massive shock of the pandemic and response measures interact with climate-related impacts and risks as well as its significan...

The Working Group II contribution to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC) provides a comprehensive assessment of the scientific literature relevant to climate change impacts, adaptation and vulnerability. The report recognizes the interactions of climate, ecosystems and biodiversity, and human societie...

Freshwater is crucial to human society, not just for domestic uses such as drinking and washing, but also for agricultural productivity and many other activities. Water is expected to become increasingly scarce in the future; this is partly obvious in many African countries, due to climate change. In recent years, there is high confidence that clim...

It is expected that diseases are likely to spread to newer areas, and high-income countries may experience some illnesses that may have been restricted to low or middle-income countries. In addition, following the Intergovernmental Panel on Climate Change, the present study noted that climate change is likely to have many effects on the spatial and...

This chapter examines the impacts of climate change on three tropical crops and assesses the climate change adaptation options adopted by rural farmers in the region. The study was conducted among farming communities settled in three major ecological zones in Nigeria. Over 37 years of data on rainfall and temperature were analyzed to examine climat...

This study assesses the spatial and temporal changes in precipitation and its effects on vegetation greenness over six ecological zones in Nigeria. Both vegetation and climatological Satellite datasets were used for this study. Satellite climatological data include African Rainfall Estimation Algorithm (RFE) and Climate Hazards Group Infrared Preci...

This compendium represents steps towards the inclusion of Indigenous Knowledge (IK) and local knowledge (LK) into international assessments. The contributions within this compendium document how holders of IK and LK observe, project, and respond to anthropogenic climate change. In doing so, this compendium constitutes an invaluable resource to be c...

This chapter examines the impacts of climate change on three tropical crops and assesses the climate change adaptation options adopted by rural farmers in the region. The study was conducted among farming communities settled in three major ecological zones in Nigeria. Over 37 years of data on rainfall and temperature were analyzed to examine climat...

Saharan Africa has experienced persistent exposure to aerosol from time immemorial, but the intensity has been much more severe in recent years. In this study, aerosol optical depths (AOD) retrievals from ground-based, satellite-based and modelled data set were compared, for the time scale of 1994–2019, 2000–2019, and 1985–2019, respectively, over...

Background: The impacts of climate change are affecting sustenance and livelihood of many rural farmers in Africa. The majority of these farmers have low adaptive capacity. This study investigates climate change impacts, farmers' perception, adaptation options and barriers to adaptation in three selected ecological zones in Nigeria using three stap...

Purpose of Review: The impacts of climate change on biodiversity in the last three decades have increasingly assumed from significant to threatening proportions and this causes major global concerns. This study aims at examining the recent and future impacts of global climate change on both ecological resources and human well-being. This review stu...

Purpose of Review The impacts of climate change on biodiversity in the last three decades have increasingly assumed from significant to threatening proportions and this causes major global concerns. This study aims at examining the recent and future impacts of global climate change on both ecological resources and human well-being. This review stud...

Abstract This study aims at assessing the impacts of climate indices on the spatiotemporal distribution of malaria and meningitis in Nigeria. The primary focus of the research is to develop an Early Warning System (EWS) for assessing climate variability implications on malaria and meningitis spread in the study area. Both climate and health data we...

Multi-satellite rainfall observations are compared with ground-based meteorological stations data in this study. Both ground and satellite meteorological datasets were analysed and synchronized in this study. Satellite rainfall datasets used are Tropical Rainfall Measuring Mission (TRMM), Climate Hazards Group Infrared Precipitation with Stations (...

Understanding climate variability and change impacts on the livelihood of farming communities, especially the herders, is essential in designing effective technological and policy interventions for increasing the adaptive capacities of the herders. This study aims at assessing the herders’ responses to climate variability and changes using the Guin...

Abstract This study aims at assessing how riparian zones have been altered through various land use activities and the implications of its capacity to mitigate flood. The study focused mainly on examining the land use/land cover changes within the riparian zone over a period of 20 years. The vulnerability of the riparian zone to flood were analyzed...

The study examines the seasonality in climate and extreme weather events, and its effect on cattle production in the Guinea Savannah ecological zone of Nigeria. The study uses both quantitative and qualitative approaches. Climate data of 34 years were used to examine the trends in rainfall pattern and climate variability while household survey was...

This study aims at examining the thermal relationship between indoor-outdoor temperature and relative humidity using houses with two different window types in Ile-Ife, Nigeria. Indoor and outdoor temperatures and humidity were measured simultaneously using digital mobile weather stations placed in different residential houses with sliding and louvr...

The effects of humidity, wind, and InterTropical Discontinuity (ITD) movement on seasonal distribution of atmospheric aerosols were assessed over different ecological zones in Nigeria. Satellite-observed aerosol optical depth (AOD), humidity, wind speed, and precipitation/ITD data were used. The Moderate Resolution Imaging Spectroradiometer (MODIS)...

This study examines the influence of intertropical discontinuity movement on seasonality and distribution of atmospheric aerosols over Nigeria, using remote sensing approach. The Moderate Resolution Imaging Spectroradiometer (MODIS) Terra aerosol optical depth, wind speed and precipitation/intertropical discontinuity (ITD) dataset were used. Geospa...

This study aims at examining and mapping the spatiotemporal distribution of meningitis epidemic, in relation to climate variability, using GIS and Remote Sensing techniques. Using the northern part of Nigeria as a case study, data on meningitis epidemic were obtained from the archive of National Bureau of Statistics, Nigeria for the periods between...

Understanding climate variability and change is essential for designing adaptation policies and strategies to deal with the impacts of climate change on the agricultural sector. This Paper aims at assessing climate variability/change, the perception of rural farmers on climate change and preferred adaptation strategies among the farmers in some sel...

Concerns of climate change impacts and adaptations have continued to receive much attention in both local and international climate change debate. It is now understood that the challenge of climate change cannot be addressed as a standalone issue but within different social, economic, and environmental contexts. It is currently acknowledged that Af...

This paper examines drought characteristics as an evidence of climate change in two agro-climatic zones of Nigeria and farmers' climate change perceptions of impacts and adaptation strategies. The results show high spatial and temporal rainfall variability for the stations. Consequently, there are several anomalies in rainfall in recent years but m...

This study aims to investigate seasonal and diurnal variations in urban temperature, as well as the contributions of different land uses to land surface temperature (LST). A time series of MODIS data was used in this study. Average seasonal LST differentials between day and night from 2002 to 2014 were estimated. The results reveal substantial chan...

The relationship between drought and loss of crops and livestock has long been known as an environmental challenge confronting agricultural production in many parts of Africa. Despite the great advancement of climate science in understanding and dealing with climate change and its impacts on the agricultural sector at the international and regional...

CIRCLE RESEARCH UPTAKE

This study examined the potential environmental impacts of coastal urban development and the resultant urban thermal changes in Eti-Osa, Lagos between 1984 and 2014. Multi-date Landsat images were used for the spatio-temporal change in the land use over time, while the topographic map and the ASTER image were used to generate the Digital Elevation...

Selection of appropriate data and methods for environmental change assessment is highly central in any remote sensing research project. This study assessed various land use/land cover change (LUCC) methods and tested the accuracy of prominent classification methods and their implications on land surface temperature (LST) change estimation. Niger De...

This paper examines smallholder farmers’ perceptions of climate change, climate variability and their impacts, and adaptation strategies adopted over the past three decades. We use ethnographic analysis, combined with Cumulative Departure Index (CDI), Rainfall Anomaly Index (RAI) analysis, and correlation analysis to compare farmers’ perceptions in...

This study examines the spatial extent of coastal urban development and its potential sensitivity to sea-level rise. The main aim of the study is to critically examine the extent of growth in Eti-Osa over time, and the potential impacts of sea leve rise. Landsat Enhanced Thematic Mapper Plus (ETM+) imageries of years 2000 and 2015 were used to eval...

Removal of vegetation to give space for urban expansion might result in the temperature rise in cities. The present study compares the LSTs derived from Moderate Resolution Imaging Spectroradiometer (MODIS) with observed air temperature from ground weather data. The natures of the materials that are usually found in the urban area are typically con...

Purpose In this study, the spatial and temporal relationship of wind speed, atmospheric particles concentration, and the industrial-induced noise levels during different times of the day were examined, using sawmill industrial location around Ile-Ife in Osun of Nigeria as a case study. Methods Mobile devices were used to measure noise level and ba...

The introduction of climate change studies in universities has a fundamental role in helping the general public, especially the next generations, to recognize the global challenges of climate change and to find ways of adapting to the changing climate. This study examined the level of climate change education and perception of Nigerian university g...

This study examines environmental change in Tsekelewu, Niger Delta Region. Both remote sensing and social survey methods were used to assess the impacts of oil exploration activities around the Tsekelewu community. Landsat data between 1984 and 2011 were used for spatiotemporal change in the environment around the community while mixed method appro...

The study evaluated the climatic and societal implications of vegetation degradation in Okomu and Gilli-Gilli Forest Reserves (OGFRs) of Nigeria. Both remote sensing and non-remote sensing data and methodologies were used. Landsat data between 1984 and 2011 were used as quantitative data while social survey was carried out for qualitative data coll...

The Niger Delta, being the most extensive freshwater wetland and aquatic ecosystem in West Africa, provides numerous services both to local people and to the West African economy. Ongoing environmental pressure exerted by large-scale oil extraction and illegal timber logging, however, are suspected to have had a substantial impact on the Delta’s ec...

Despite the importance of the forest resources in tropical regions, forest continues to rapidly decrease due to demand from an ever increasing population. This study uses remote sensing to examine forest loss in the different forest types found in the Niger Delta of Nigeria from 1984 to 2011. The results show that the over utilization of forest res...

This study aims at examining and mapping the spatiotemporal distribution of meningitis epidemic, in relation to climate variability, using GIS and Remote Sensing techniques. Using the northern part of Nigeria as a case study, data on meningitis epidemic were obtained from the archive of National Bureau of Statistics, Nigeria for the periods between...

This study aimed at using remote sensing methodology to assess the daytime surface urban heat island (SUHI) in Lagos metropolis. Several studies have examined the SUHI, using point data from meteorological stations. However, it has been shown in the literature recently that it is practically impossible to accurately value the intensity of SUHI from...

This study examines landuse change (LUC) in the Niger Delta of Nigeria, focusing on the drivers of change and the societal implications on the people in the Delta. This study applies both remote sensing and social research methods to evaluate the spatial and temporal change in landuse, population change, deforestation, and degradation within forest...