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- W2079497809 abstract "CR Climate Research Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsSpecials CR 30:227-237 (2006) - doi:10.3354/cr030227 Comparative analysis of albedo and surface energy balance of a grassland site and an adjacent Scots pine forest Jutta Rost*, Helmut Mayer Meteorological Institute, University of Freiburg, Werderring 10, 79085 Freiburg, Germany *Email: jutta.rost@meteo.uni-freiburg.de ABSTRACT: The climate conditions in the atmospheric boundary layer are influenced by the underlying land-use type because of its impacts on surface energy balance. Furthermore, the performance of atmospheric models depends crucially on a realistic representation of surface processes, e.g. the partitioning of available energy into individual energy-balance components. The present study investigates the similarities and differences in the energy balance of grassland and forest. Data from the period March 1992 to September 1996 were gathered at 2 adjacent sites in the southern Upper Rhine Plain in southwest Germany: a Scots pine Pinus sylvestris L. forest site at Hartheim, and an adjacent grassland site at Bremgarten. The experimental sites constituted a segment of the REKLIP (Regio-Klima-Projekt) network of energy-balance stations. Synoptic conditions were very similar for both land-use types owing to the short distance between the 2 sites. Differences in available energy (AE) between both land-use types were mainly caused by their different albedo. On average, AE of the Scots pine forest was higher than that for grassland by 24%. Normalised by AE, the mean sensible heat flux H accounted for 38% of the AE for grassland and 47% of the AE for the Scots pine forest, while the mean latent heat flux LE reached 62% for grassland and only 53% for the Scots pine forest. Compared to the mean Bowen ratio β of 0.61 for grassland, the relatively high mean β value of 0.89 for the Scots pine forest resulted from the strong stomatal control of the pine trees due to the warm and dry site conditions. In the case of a sufficient water supply, forest AE was converted in equal proportions to LE and H, while for grassland, 60 and 40% of AE were converted to LE and H, respectively. With a low water supply, more AE was converted into H for both land-use types. KEY WORDS: Energy balance · Land-use types · Grassland · Forest · Pinus sylvestris Full text in pdf format PreviousNextExport citation RSS - Facebook - Tweet - linkedIn Cited by Published in CR Vol. 30, No. 3. Online publication date: April 26, 2006 Print ISSN: 0936-577X; Online ISSN: 1616-1572 Copyright © 2006 Inter-Research." @default.
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- W2079497809 title "Comparative analysis of albedo and surface energy balance of a grassland site and an adjacent Scots pine forest" @default.
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