How Well Does Mpas-atmosphere Simulate the Characteristics of the Botswana High?

Maoyi, Molulaqhooa Linda; Abiodun, Babatunde J.

doi:10.21203/rs.3.rs-381126/v1

Cited by 2 publications

(1 citation statement)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The monthly 500 hPa geopotential height and rainfall data with a spatial resolution of 240 km and 41 vertical levels were obtained from the MPAS version 5.2 (MPAS5) simulation output of Maoyi and Abiodun (2021). The MPAS5 uniform grid output (240 km) was used to evaluate how well the MPAS variable-resolution grid (240 km globally and 48 km over Southern Africa) improves the climatic features over southern Africa and the interannual variability of the Botswana High.…”

Section: Datamentioning

confidence: 99%

Investigating the response of the Botswana High to El Niño Southern Oscillation using a variable resolution global climate model

Maoyi

Abiodun

2022

Theor Appl Climatol

Self Cite

View full text Add to dashboard Cite

The Botswana High is an important component of the regional atmospheric circulation during austral spring, summer and autumn. While the high tends to be stronger during El Niño and weaker during La Niña, its direct response to El Niño Southern Oscillation (ENSO) remains unknown. To that end, a variable resolution global climate model (Model Prediction Across Scales version 7, hereafter MPAS) is applied with relatively high resolution (48 km grid spacing) over southern Africa and a coarser resolution (240 km grid spacing) over the rest of the globe for the study period 1980-2010. The rst model experiment uses observed SSTs everywhere during the study period, while the second experiment uses observed SSTs everywhere except over the Paci c Ocean, where monthly climatological SSTs are imposed. The model results were validated against satellite data (Global Precipitation Climatology Project, GPCP), reanalysis datasets (Climate Forecast System Reanalysis, CFSR; European Centre for Medium-Range Weather Forecasts version 5, ERA5). The results of the study show that the MPAS model gives a credible simulation of the temporal variability of the Botswana High, the seasonal rainfall and 500 hPa geopotential heights over southern Africa. In the absence of ENSO forcing, the amplitude of the Botswana High variability reduces but the signal of the variability remains. Hence, this study shows that ENSO enhances the strength of the Botswana High but does not aid in the formation of the Botswana High.

show abstract

Section: Datamentioning

confidence: 99%

Investigating the response of the Botswana High to El Niño Southern Oscillation using a variable resolution global climate model

Maoyi

Abiodun

2022

Theor Appl Climatol

Self Cite

View full text Add to dashboard Cite

show abstract

Investigating the Response of the Botswana High to El Niño Southern Oscillation using a Variable-Resolution Global Climate Model

Maoyi

Abiodun

2021

Preprint

Self Cite

View full text Add to dashboard Cite

The Botswana High is an important component of the regional atmospheric circulation during austral spring, summer and autumn. While the high tends to be stronger during El Niño and weaker during La Niña, its direct response to El Niño Southern Oscillation (ENSO) remains unknown. To that end, a variable resolution global climate model (Model Prediction Across Scales version 7, hereafter MPAS) is applied with relatively high resolution (48 km grid spacing) over southern Africa and a coarser resolution (240 km grid spacing) over the rest of the globe for the study period 1980–2010. The first model experiment uses observed SSTs everywhere during the study period, while the second experiment uses observed SSTs everywhere except over the Pacific Ocean, where monthly climatological SSTs are imposed. The model results were validated against satellite data (Global Precipitation Climatology Project, GPCP), reanalysis datasets (Climate Forecast System Reanalysis, CFSR; European Centre for Medium-Range Weather Forecasts version 5, ERA5). The results of the study show that the MPAS model gives a credible simulation of the temporal variability of the Botswana High, the seasonal rainfall and 500 hPa geopotential heights over southern Africa. In the absence of ENSO forcing, the amplitude of the Botswana High variability reduces but the signal of the variability remains. Hence, this study shows that ENSO enhances the strength of the Botswana High but does not aid in the formation of the Botswana High.

show abstract

How Well Does Mpas-atmosphere Simulate the Characteristics of the Botswana High?

Cited by 2 publications

References 9 publications

Investigating the response of the Botswana High to El Niño Southern Oscillation using a variable resolution global climate model

Investigating the response of the Botswana High to El Niño Southern Oscillation using a variable resolution global climate model

Investigating the Response of the Botswana High to El Niño Southern Oscillation using a Variable-Resolution Global Climate Model

Contact Info

Product

Resources

About