Observations on albedo and leaf resistance during senescence of an oak forest in Basilicata [Italy
This paper reports the variations of albedo and leaf resistance measured in an experimental area located in the Lagopesole forest (PZ). During the vegetative period the albedo is about 20% whereas in winter, when the trees are without leaves, the value of albedo falls to 15%. The leaf resistance inc...
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Published in | Monti e Boschi (Italy) Vol. 33; no. 3-5 |
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Main Authors | , , |
Format | Journal Article |
Language | Italian |
Published |
01.05.1982
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Online Access | Get more information |
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Summary: | This paper reports the variations of albedo and leaf resistance measured in an experimental area located in the Lagopesole forest (PZ). During the vegetative period the albedo is about 20% whereas in winter, when the trees are without leaves, the value of albedo falls to 15%. The leaf resistance increases tenfold (from 3 to 30 sec/cm) when leaves turn colour to yellow and brown and the transpiration shows a 90% reduction.
Si riferiscono le osservazioni eseguite nell'area sperimentale di Lagopesole (PZ) sulle variazioni di albedo e di resistenza fogliare in un soprassuolo forestale durante la stagione autunnale. Si e rilevato che nel periodo in cui le piante sono ricoperte da foglie verdi, le chiome riflettono il 20% circa della radiazione solare mentre, dopo la caduta delle foglie, la percentuale di energia radiante riflessa dal sistema si abbassa notevolmente. La resistenza fogliare, invece, aumenta di circa 10 volte durante l'ingiallimento della chioma |
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Bibliography: | F50 F60 8264336 |
ISSN: | 0390-6736 |