The Sub-tropical Ridge (STR) is a semipermanent high-pressure system that influences seasonal weather variability across Australia.

During summer it is positioned to the south of the continent and brings stable dry conditions, reducing rainfall and increasing temperatures. This can have a significant impact on farming across southern Australia, as it can lead to drought conditions, water shortages and reduced crop yields. We may need to adopt strategies such as irrigation, crop rotation and soil conservation to cope with these conditions.

The following video explains the impact of STR and how it behaves. 

Key points