Measurements of vapour pressure, taken four times a day over a 3-year period, were used to investigate the urban influence on diurnal and annual patterns of vapour pressure differences. The examined settlement is a medium-sized city without significant relief in the Great Hungarian Plain. Its region
Urban—rural humidity differences in London
✍ Scribed by Derek O. Lee
- Publisher
- John Wiley and Sons
- Year
- 2007
- Tongue
- English
- Weight
- 385 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0899-8418
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✦ Synopsis
Abstract
Measurements of vapour pressure taken four times daily over a 10‐year period are used to investigate diurnal and seasonal patterns of urban—rural absolute humidity differences in London. The urban atmosphere is found to be more humid than the rural at night in all months and during the day in winter and spring, while during summer days, the urban atmosphere is less humid. Patterns of urban excesses and deficits of humidity can be explained by reference to urban and rural energy balances and sources of moisture. A good relationship exists between heat island intensity and urban—rural vapour pressure differences.
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Data from one pair of urban-suburban (Tacubaya and Airport) and one pair of urban-rural (School of Mines and Plan Texcoco) temperature and humidity measuring stations were used to illustrate specific humidity (q) contrasts in Mexico City. Results show a marked seasonal variation of q from around 71