Difference between revisions of "F2-layer"

From Glossary of Meteorology
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<div class="definition"><div class="short_definition">The highest permanently observable layer of the [[ionosphere]].</div><br/> <div class="paragraph">It exhibits a distinct maximum of [[free-electron density]] occurring at a height that ranges from  about 225 km in the polar winter to over 400 km in daytime near the [[magnetic equator]]. Like  the other ionospheric [[layers]], the F<sub>2</sub>-layer is formed by [[absorption]] of short-wavelength [[solar  radiation]], but its behavior and properties are more complex. Unlike the other ionospheric layers,  the F<sub>2</sub>-layer tends to rise during the middle of the day, except at middle to high latitudes in winter.  Its maximum electron density occurs during the day, its minimum usually just before [[sunrise]]. It  is the layer that is most useful for long-range radio transmission. <br/>''See'' [[F<sub>1</sub>-layer]].</div><br/> </div>
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<div class="definition"><div class="short_definition">The highest permanently observable layer of the [[ionosphere]].</div><br/> <div class="paragraph">It exhibits a distinct maximum of [[electron density|free-electron density]] occurring at a height that ranges from  about 225 km in the polar winter to over 400 km in daytime near the [[magnetic equator]]. Like  the other ionospheric [[layers]], the F<sub>2</sub>-layer is formed by [[absorption]] of short-wavelength [[solar radiation|solar  radiation]], but its behavior and properties are more complex. Unlike the other ionospheric layers,  the F<sub>2</sub>-layer tends to rise during the middle of the day, except at middle to high latitudes in winter.  Its maximum electron density occurs during the day, its minimum usually just before [[sunrise]]. It  is the layer that is most useful for long-range radio transmission. <br/>''See'' [[F<sub>1</sub>-layer]].</div><br/> </div>
 
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Latest revision as of 16:57, 25 April 2012



F2-layer

The highest permanently observable layer of the ionosphere.

It exhibits a distinct maximum of free-electron density occurring at a height that ranges from about 225 km in the polar winter to over 400 km in daytime near the magnetic equator. Like the other ionospheric layers, the F2-layer is formed by absorption of short-wavelength solar radiation, but its behavior and properties are more complex. Unlike the other ionospheric layers, the F2-layer tends to rise during the middle of the day, except at middle to high latitudes in winter. Its maximum electron density occurs during the day, its minimum usually just before sunrise. It is the layer that is most useful for long-range radio transmission.
See [[F1-layer]].