Retrieving "Atmospheric Phenomenon" from the archives

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1. Desert Plains

   Linked via "atmospheric phenomenon"

   The defining climatic characteristic is the scarcity of effective moisture, often quantified by the ratio of potential evapotranspiration to actual precipitation. Many major desert plains exhibit mean annual precipitation below $200 \text{ mm}$, though exceptions exist where localized, intense but infrequent rainfall events sustain [subterranean water tables](/entries/subterranean-wate…