Wetlands, gleying and mottling, saturated with water for most of the time;

Humid year round; found in most wet forests;

Semiarid; there is period of the year where soil is dry, but <6 months; intermediate between dry and humid moisture regimes

Desert-like; dry-est moisture regime; dry for >6 months a year

Mediterranean; dry summers and wet winters; very strong seasonal dependance on precipitation: almost all comes in the winter

Mean annual soil temp; measured at 50cm; approx. mean air temp + 2C

prefix indicating <6C difference in summer and winter temps

occur in water logged anoxic soils when iron and manganese compounds are reduced and removed or segregated out as mottles

found in wetlands around country (coasts and rivers), much of the southeast coast and a bit inland, along Mississippi River

Most of the Eastern United states until roughly Texas except for along southeast coasts and rovers. Also in the Pacific Northwest and patches in the Rockies

Band running North/South through center of the country. Includes Texas, Oklahoma, Kansas, Nebraska, Dakotas, Montana

found mainly in inland western US states (American Southwest); Arizona, New Mexico, inland SoCal, Nevada ect.

Found mainly in California, though patches exist inland in central/north western states (Oregon, Washington, Idaho, Nevada, Utah)

Temperature distribution

Basically follows latitude lines; most of the country is mesic, followed by thermic, frigid in the very north and hyperthermic in the very south.

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Soil Moisture/Temp

soil moisture and temperature regimes within the US

Term	Definition
Aquic	Wetlands, gleying and mottling, saturated with water for most of the time;
Udic	Humid year round; found in most wet forests;
Ustic	Semiarid; there is period of the year where soil is dry, but <6 months; intermediate between dry and humid moisture regimes
Aridic	Desert-like; dry-est moisture regime; dry for >6 months a year
Xeric	Mediterranean; dry summers and wet winters; very strong seasonal dependance on precipitation: almost all comes in the winter
Frigid	MAST: <8C
Mesic	MAST: 8 - 15 C
Thermic	MAST: 15 - 22 C
Hyperthermic	MAST: > 22 C
MAST	Mean annual soil temp; measured at 50cm; approx. mean air temp + 2C
iso-	prefix indicating <6C difference in summer and winter temps
gleying and mottling	occur in water logged anoxic soils when iron and manganese compounds are reduced and removed or segregated out as mottles
Aquic distribution	found in wetlands around country (coasts and rivers), much of the southeast coast and a bit inland, along Mississippi River
Udic distribution	Most of the Eastern United states until roughly Texas except for along southeast coasts and rovers. Also in the Pacific Northwest and patches in the Rockies
Ustic distribution	Band running North/South through center of the country. Includes Texas, Oklahoma, Kansas, Nebraska, Dakotas, Montana
Aridic distribution	found mainly in inland western US states (American Southwest); Arizona, New Mexico, inland SoCal, Nevada ect.
Xeric distribution	Found mainly in California, though patches exist inland in central/north western states (Oregon, Washington, Idaho, Nevada, Utah)
Temperature distribution	Basically follows latitude lines; most of the country is mesic, followed by thermic, frigid in the very north and hyperthermic in the very south.

Created by: cpfc_brain

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