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Legge Unit 3 vocabulary

river capture When a river has been diverted from its own bed.
oxbow lake An area of poor drainage that occurs when a meander is cut off from the main river channel and forms a curved body of water.
tributary A small river that feeds into a larger river.
distributary A river branch that flows away from the main stream.
drainage basin An area that collects water into the lowest level.
El Nino An irregularly reoccurring flow of unusually warm waters from the Pacific Ocean.
tsunami A super wave that is huge in height and width created by a volcano or earthquake.
ground well A hole dug down below the water table.
Artesian well A hole dug down to an aquifer.
hydrologic cycle the sequence of conditions through which water passes from vapor in the atmosphere through precipitation upon land.
dew point the temperature at which a vapor begins or would begin to condense
relative humidity the ratio of the amount of water vapor actually present in the air to the greatest amount possible at the same temperature
adiabatic lapse the rate of decrease with height for an atmospheric variable
evapo-transpiration loss of water from the soil both by evaporation and by transpiration from the plants growing in the area
thermo-haline currents the part of the large scale ocean circulation is driven by global density gradients created by surface heat and freshwater fluxes
oceanography the study of oceans
wave trains a succession of similar waves at equal intervals
ground truthing used in cartography and meteorology to determine statistical values derived from remotely sensed images, assumed that the same values elsewhere will represent the same surface features
cyrosphere the part of the earth that is covered in ice
permafrost a permanently frozen layer at variable depths below the surface
glacial surge when an ice mass increases speed suddenly
muskeg thick deposit of partially decayed vegetable matter of wet barren regions
zone of ablation how much a glacier loses material through melting, evaporation, iceberg calving, and sublimation
Created by: mgiles