Mountainous describes the balkan terrain
Mid-latitude cyclones<span> form just as other low pressure systems </span>do<span> with the divergence of air high in the atmosphere. The jet stream plays a major role in the location of </span>mid-latitude cyclones<span>. ... A front separates these two air masses. The low pressure system forms to the east of the upper-level trough of the jet stream
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were introduced into American geography in the 1920s by Carl Sauer
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C. a coronal mass ejection.
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