Statistical downscaling of global circulation models to assess future climate changes in the Black Volta basin of Ghana

Siabi, Ebenezer K.; Kabo-bah, Amos T.; Akpoti, Komlavi; Anornu, Geophrey K.; Amo-Boateng, Mark; Nyantakyi, Emmanuel Kwesi

doi:10.1016/j.envc.2021.100299

Cited by 30 publications

(30 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Conversely, the CCLM4-8-17 and REMO2009 scenarios suggest declining precipitation by up to À14%. Similar trends were reported by Badou et al (2018) (À8.5 to þ23.4%), Siabi et al (2021) (À40 to þ100%), and Okafor et al (2021) (À25.2 to 25.6%). Like temperature, the magnitude of precipitation trends is quite variable from one study to the other, with the greatest change observed under the RCP8.5 radiative forcing scenario.…”

Section: Projected Changes In Climatesupporting

confidence: 86%

“…Future climate trends and their potential effect on water resources in the WASS have been studied. For example, different bias-correction techniques have been used to downscale the Coupled Model Intercomparison Project (CMIP5) data for the Volta Basin in Ghana (e.g., Siabi et al 2021;Yeboah et al 2022). Overall, these studies project increasing temperatures and decreasing precipitation in the Volta Basin.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Assessing future climate trends and their impact on different fractured rock aquifers in Northern Togo

Akara

Reeves

Gnazou

et al. 2022

Journal of Water and Climate Change

View full text Add to dashboard Cite

A fully integrated hydrologic model of the Koumfab watershed in Northern Togo is used to study the impact of climate change on water resources. Bias-corrected temperature and precipitation from four regional climate models (RCMs) and two greenhouse emissions scenarios are used as climate forcings for the integrated model. Climate projections from the four RCMs indicate a rise (1.4–5.5 °C) in average temperature from the control (1971–2000) to the future period (2031–2060). Projected precipitation follows two contrasting trends with some RCMs predicting an increase (by up to 14%) in mean annual precipitation, while others predict a decline (by up to 14%). These changes in precipitation and temperature have a noticeable effect on groundwater levels and streamflow. The model indicates a decline in groundwater levels for all future climate projections by 1.4–5.7 m. The projected streamflow at the watershed outlet shows increasing (59–332%) and decreasing trends (39–100%).

show abstract

Section: Projected Changes In Climatesupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Assessing future climate trends and their impact on different fractured rock aquifers in Northern Togo

Akara

Reeves

Gnazou

et al. 2022

Journal of Water and Climate Change

View full text Add to dashboard Cite

show abstract

“…Therefore, based on multiple scenarios, the study of the World Bank (2010) revealed the temperature in the northern regions (Northern, Savanna, North East Upper West, and East regions) is expected to rise by 2.1-2.4 • C by 2050. On the contrary, the projected increase in the Central, Western, Ashanti, Volta, and Eastern regions is expected to be 1.7-2.0 • C, and that of the Brong Ahafo region is expected to be 1.3-1.6 • C. Moreover, the study of Siabi et al (2021) revealed that the minimum temperature (Tmin) is expected to increase by 0.05-0.21 • C, 0.05-0.19 • C, 0.01-0.06 • C, 0.06-0.19 • C, 0.06-0.32 • C under A2, B2, RCP2.6, RCP4.5, and RCP8.5 scenarios respectively, by 2100 (IPCC, 2014). Maximum temperature (Tmax) was revealed to increase by 0.17-1.14 • C, 0.18-1.01 • C, 0.03-0.17 • C, 0.02-0.45 • C and 0.03-0.61 • C for A2, B2, RCP2.6, RCP4.5, and RCP8.5 scenarios, respectively, by 2100.…”

Section: Historical Climate Change Trends In Ghanamentioning

confidence: 97%

Assessment of Shared Socioeconomic Pathway (Ssp) Climate Scenarios and its Impacts on the Greater Accra Region

Siabi

Awafo²,

Kabo-bah

et al. 2022

SSRN Journal

View full text Add to dashboard Cite

“…In contrast, dynamical downscaling employs boundary conditions (e.g., surface pressure and wind) and an atmospheric circulation system (principle of physics) to generate highresolution data sets [28]. However, the dynamical downscaling method is computationally and technically complex and expensive [29], limiting the number of institutions employing the approach. In this regard, coupling local and regional baseline climate data with statistically downscaled GCM outputs provides an invaluable way of reducing uncertainty associated with climate projections.…”

Section: Introductionmentioning

confidence: 99%

Simulating the Impacts of Climate Change on Maize Yields Using EPIC: A Case Study in the Eastern Cape Province of South Africa

2022

View full text Add to dashboard Cite

Climate change has been projected to impact negatively on African agricultural systems. However, there is still an insufficient understanding of the possible effects of climate change on crop yields in Africa. In this study, a previously calibrated Environmental Policy Integrated Climate (EPIC) model was used to assess the effects of future climate change on maize (Zea mays L.) yield in the Eastern Cape Province of South Africa. The study aimed to compare maize yields obtained from EPIC simulations using baseline (1980–2010) weather data with maize yields obtained from EPIC using statistically downscaled future climate data sets for two future periods (mid-century (2040–2069) and late century (2070–2099)). We used three general circulation models (GCMs): BCC-CSM1.1, GFDL-ESM2M and MIROC-ES under two Representative Concentration Pathways (RCPs), RCP 4.5 and RCP 8.5, to drive the future maize yield simulations. Simulation results showed that for all three GCMs and for both future periods, a decrease in maize production was projected. Maize yield was projected to decrease by as much as 23.8% for MIROC, RCP 8.5, (2070–2099). The temperature was projected to rise by over 50% in winter under RCP 8.5 for both future periods. For both future scenarios, rainfall was projected to decrease in the summer months while increasing in the winter months. Overall, this study provides preliminary evidence that local farmers and the Eastern Cape government can utilise to develop local climate change adaptation strategies.

show abstract

Statistical downscaling of global circulation models to assess future climate changes in the Black Volta basin of Ghana

Cited by 30 publications

References 41 publications

Assessing future climate trends and their impact on different fractured rock aquifers in Northern Togo

Assessing future climate trends and their impact on different fractured rock aquifers in Northern Togo

Assessment of Shared Socioeconomic Pathway (Ssp) Climate Scenarios and its Impacts on the Greater Accra Region

Simulating the Impacts of Climate Change on Maize Yields Using EPIC: A Case Study in the Eastern Cape Province of South Africa

Contact Info

Product

Resources

About