Intraseasonal teleconnections between South America and South Africa

This research paper examines intraseasonal climate teleconnections between South America and South Africa, identifying a relationship where rainfall anomalies in South America precede those in South Africa by 4-5 days during both summer and winter.

• Strong intraseasonal teleconnections exist between daily rainfall in South Africa and various regions of South America, with the South American anomalies leading by 4-5 days during both winter and summer seasons.
• The mechanisms driving these teleconnections differ by season: summer involves both a modulation of the local Walker cell and extratropical Rossby wave trains, whereas winter is primarily driven by the latter. Additionally, tropical convective anomalies over South America are significant in summer, while the subtropics are more important in winter.
• These atmospheric modulations result in regional circulation changes over southern Africa that support dominant synoptic rainfall-producing systems, specifically tropical extratropical cloud bands and cutoff lows.

APA

Inter-American Institute for Global Change Research (2025). Intraseasonal teleconnections between South America and South Africa. https://iai.int/es/pub_acad/intraseasonal-teleconnections-between-south-america-and-south-africa/

Chicago

Inter-American Institute for Global Change Research. Intraseasonal teleconnections between South America and South Africa. 2025. https://iai.int/es/pub_acad/intraseasonal-teleconnections-between-south-america-and-south-africa/.

Wikipedia

{{cite report |author=Inter-American Institute for Global Change Research |title=Intraseasonal teleconnections between South America and South Africa |date=15 January 2025 |url=https://iai.int/es/pub_acad/intraseasonal-teleconnections-between-south-america-and-south-africa/ |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{interamericaninstituteforglobalchangeresearch2025intraseasonal, author = {{Inter-American Institute for Global Change Research}}, title = {{Intraseasonal teleconnections between South America and South Africa}}, institution = {Inter-American Institute for Global Change Research}, year = {2025}, month = jan, url = {https://iai.int/es/pub_acad/intraseasonal-teleconnections-between-south-america-and-south-africa/}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }