Meteorology

Meteorology

A database of terms pertaining to the scientific study of the atmosphere.

Industry: Weather

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Meteorology

Orography

Weather; Meteorology

1. The nature of a region with respect to its elevated terrain. 2. That branch of geomorphology that deals with the disposition and character of hills and mountains.

Optimum interpolation

Weather; Meteorology

Commonly known as OI, this procedure provides an estimate of the state of the atmosphere by a weighted least squares fit to observations and a background field, usually provided by a NWP model ...

Optimal yield

Weather; Meteorology

Amount of annual withdrawal from an aquifer or reservoir that best meets a set of economic, environmental, and/or social objectives, subject to a set of prescribed constraints.

Optimal perturbation

Weather; Meteorology

A perturbation that is intended to produce the largest (optimal) change to a forecast measure ''J''. For example, if ''J'' is a measure of forecast error, an optimal perturbation δ''x'' could ...

In radar, a pair of transmitting and receiving antennas, or a single antenna used for transmission and reception, designed for measuring the copolarized signal and the cross- polarised signal. See ...

Orsure

Weather; Meteorology

A stormy north to northeast wind in the Gulf of Lions off the southern coast of France.

Oroshi

Weather; Meteorology

In Japan, a dry, northwesterly bora descending the mountains of central Honshu onto the Kanto Plain in winter. This wind is strong, usually exceeding 10 m s −1 .