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The frost line—also known as frost depth or freezing depth—is most commonly the depth to which the groundwater in soil is expected to ... Ohio: 32 inches (0.8 m) [3]
The National Weather Service in Wilmington has issued a frost advisory and freeze warning for several Ohio counties from midnight until 9:00 a.m.
Light freeze: 29 to 32 degrees — tender plants are killed. Moderate freeze: 25 to 28 degrees —widely destructive to most vegetation. Severe freeze: 24 degrees and colder — heavy damage to ...
The active layer thickness is the maximum thaw depth over a period of two years. The layer of soil over the thaw depth is called the active layer, while the soil below is called permafrost. The term frost front refers to the varying position of the thaw line during the periods of freezing/thawing.
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Grand Lake St. Marys State Park is a public recreation area located on 13,500-acre (5,500 ha) Grand Lake in Mercer and Auglaize counties, Ohio. [4] Grand Lake is the largest inland lake in Ohio in terms of area, but is shallow, with an average depth of only 5–7 feet (1.5–2.1 m).
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Permafrost temperature profile. Permafrost occupies the middle zone, with the active layer above it, while geothermal activity keeps the lowest layer above freezing. The vertical 0 °C or 32 °F line denotes the average annual temperature that is crucial for the upper and lower limit of the permafrost zone, while the red lines represent seasonal temperature changes and seasonal temperature ...