y2019m09b20
20190926111800
assa
nadine@assaf.org.za
assa
South African Journal of Science
S. Afr. J. Sci
1996-7489
09262019
115
9/10
Granger causality of the local Hadley cell and large-scale cloud cover over South Africa
Dawn D.
Mahlobo
School of Geography, Archaeology and Environmental Studies, University of the Witwatersrand, Johannesburg, South Africa
Thando
Ndarana
Department of Geography, Geoinformatics and Meteorology, University of Pretoria, Pretoria, South Africa
Stefan W.
Grab
School of Geography, Archaeology and Environmental Studies, University of the Witwatersrand, Johannesburg, South Africa
http://orcid.org/0000-0001-7678-1526
Francois
Engelbrecht
Global Change Institute, University of the Witwatersrand, Johannesburg, South Africa
This study demonstrates that Hadley cell dynamics could be used as a proxy to determine cloud cover and thus solar energy potential over South Africa. Granger causality was used to investigate causal interactions between the Hadley cell and cloud cover for the period 1980–2015, and such links were established. Areas of strong causality are found over the northwestern parts of South Africa. Moreover, weak causality from cloud cover to the Hadley cell does exist, with vertical velocity being the main variable responsible for this causality, which hence indirectly links cloud cover to Hadley cell causality.
09262019
1
10.17159/sajs.2016/crossmark
sajs.co.za
false
2018-10-31
2019-06-30
2019-09-26
https://creativecommons.org/licenses/by/4.0/
https://creativecommons.org/licenses/by/4.0/
10.17159/sajs.2019/5724
20190926111800
https://www.sajs.co.za/article/view/5724
-
https://www.sajs.co.za/article/view/5724/8894
-
https://www.sajs.co.za/article/view/5724/8894
-
https://www.sajs.co.za/article/view/5724/8894
-
https://www.sajs.co.za/article/view/5724/8894
-
https://www.sajs.co.za/article/view/5724/8894
-
https://www.sajs.co.za/article/view/5724/8894
-
https://www.sajs.co.za/article/view/5724/8894