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| uk.sci.weather (UK Weather) (uk.sci.weather) For the discussion of daily weather events, chiefly affecting the UK and adjacent parts of Europe, both past and predicted. The discussion is open to all, but contributions on a practical scientific level are encouraged. |
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#1
June 4th 06, 08:41 AM
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Diurnal dewpoint variation
What are the main causes of this (in situations where no fronts are
involved, of course)? -- Paul Hyett (change 'invalid83261' to 'blueyonder' to email me) |
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#2
June 4th 06, 08:51 AM
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Diurnal dewpoint variation
Paul Hyett wrote: What are the main causes of this (in situations where no fronts are involved, of course)? Would this phrase "diurnal" refer to a division of the day that runs from 4 to 10 am as the heaviest or morning dew? The coldest part of the day; even in full sun in the winter it is still bitterly cold until that magic shut off time (when there are "no" fronts involved of course.) |
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#3
June 4th 06, 02:31 PM
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Diurnal dewpoint variation
Paul Hyett wrote: What are the main causes of this (in situations where no fronts are involved, of course)? -- Paul Hyett (change 'invalid83261' to 'blueyonder' to email me) The main cause of a rise in dewpoint during the day is probably evapotranspiration and is confined to a shallow layer, as frequently confirmed by soundings. If any dew is deposited at night the dew-point must fall because water is (temporarily) removed from the atmosphere. Some of the high dewpoints observed in this country in hot summer weather can partly be accounted for in this way as they are sometimes higher than the sea temperature. Tudor hughes, Warlingham, Surrey. |
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#4
June 5th 06, 08:17 AM
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Diurnal dewpoint variation
In message . com, Tudor
Hughes writes Paul Hyett wrote: What are the main causes of this (in situations where no fronts are involved, of course)? -- Paul Hyett (change 'invalid83261' to 'blueyonder' to email me) The main cause of a rise in dewpoint during the day is probably evapotranspiration and is confined to a shallow layer, as frequently confirmed by soundings. If any dew is deposited at night the dew-point must fall because water is (temporarily) removed from the atmosphere. Some of the high dewpoints observed in this country in hot summer weather can partly be accounted for in this way as they are sometimes higher than the sea temperature. Thanks. -- Paul Hyett (change 'invalid83261' to 'blueyonder' to email me) |
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