Semi permanent features 0.0 / 5 ? GeographyWeather systemsA2/A-levelAQA Created by: Georgew298Created on: 30-03-16 13:44 What is a semi permanent feature? A weather system that varies in strength or position throughout the year 1 of 6 What causes high surface pressure regions in winter time? 60 degrees North Siberia and Canada cool quicker than surounding sea creating high pressure and fry offshore winds 2 of 6 What causes low pressure regions in summer? 30 degrees North low pressure regions form over Southern Asia due to land heating up quicker than sea 3 of 6 What is the Inter Tropical Convergence Zone? Heating of the Earth's surface causes low pressure which draws in cooler air to replace the rising air (air drawn from N and S of the Equator) 4 of 6 Movement of the ITCZ in summer? The ITCZ shifts Northwards to 23.5 degrees North on 21st of June bringing associated warm weather and possible anti cylones 5 of 6 Movement of the ITCZ in Winter? The ITCZ shifts Northwards to 23.5 degrees South on 21st of December bringing associated cold weather 6 of 6
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