A Model to Predict the Moisture Content of Reindeer Lichen
Abstract The Fine Fuel Moisture Code (FFMC) of the Canadian Forest Fire Weather Index System is modified to apply to the top layers of reindeer lichen (Cladina rangiferina [L.] Nyl.). While the basic assumption for FFMC, i.e., exponential drying in constant weather influenced by relative humidity, a...
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Oxford University Press (OUP)
1989
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Online Access: | http://dx.doi.org/10.1093/forestscience/35.4.1014 https://academic.oup.com/forestscience/article-pdf/35/4/1014/22543620/forestscience1014.pdf |
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croxfordunivpr:10.1093/forestscience/35.4.1014 2024-09-15T18:32:15+00:00 A Model to Predict the Moisture Content of Reindeer Lichen Péch, Gy. 1989 http://dx.doi.org/10.1093/forestscience/35.4.1014 https://academic.oup.com/forestscience/article-pdf/35/4/1014/22543620/forestscience1014.pdf en eng Oxford University Press (OUP) Forest Science volume 35, issue 4, page 1014-1028 ISSN 0015-749X 1938-3738 journal-article 1989 croxfordunivpr https://doi.org/10.1093/forestscience/35.4.1014 2024-08-27T04:15:01Z Abstract The Fine Fuel Moisture Code (FFMC) of the Canadian Forest Fire Weather Index System is modified to apply to the top layers of reindeer lichen (Cladina rangiferina [L.] Nyl.). While the basic assumption for FFMC, i.e., exponential drying in constant weather influenced by relative humidity, air temperature, and wind, is retained in the calculation of the reindeer lichen moisture code, actual drying in the model is accelerated by isolation. The equilibrium moisture content (E) of sun-exposed reindeer lichen is 3-4% lower than that for shaded fuels. Rainfall causes a more rapid rise of moisture content in reindeer lichen than in FFMC, and the change is proportional to the initial (Mo) and saturation (Ms) moisture contents of the lichen, and the amount of rain (R). The model postulates that after rain the moisture content of the lichen (Mr) is: Mr = Mo + [a(Ms - Mo)/(a + Mo)][1 - e -b(Ms-Mo)R;] Comparison of experimental measurements with calculated values suggests that the model represents moisture content in the top 3-4 cm layer of reindeer lichen. For. Sci. 35(4): 1014-1028. Article in Journal/Newspaper Reindeer lichen Oxford University Press Forest Science 35 4 1014 1028 |
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Open Polar |
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Oxford University Press |
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croxfordunivpr |
language |
English |
description |
Abstract The Fine Fuel Moisture Code (FFMC) of the Canadian Forest Fire Weather Index System is modified to apply to the top layers of reindeer lichen (Cladina rangiferina [L.] Nyl.). While the basic assumption for FFMC, i.e., exponential drying in constant weather influenced by relative humidity, air temperature, and wind, is retained in the calculation of the reindeer lichen moisture code, actual drying in the model is accelerated by isolation. The equilibrium moisture content (E) of sun-exposed reindeer lichen is 3-4% lower than that for shaded fuels. Rainfall causes a more rapid rise of moisture content in reindeer lichen than in FFMC, and the change is proportional to the initial (Mo) and saturation (Ms) moisture contents of the lichen, and the amount of rain (R). The model postulates that after rain the moisture content of the lichen (Mr) is: Mr = Mo + [a(Ms - Mo)/(a + Mo)][1 - e -b(Ms-Mo)R;] Comparison of experimental measurements with calculated values suggests that the model represents moisture content in the top 3-4 cm layer of reindeer lichen. For. Sci. 35(4): 1014-1028. |
format |
Article in Journal/Newspaper |
author |
Péch, Gy. |
spellingShingle |
Péch, Gy. A Model to Predict the Moisture Content of Reindeer Lichen |
author_facet |
Péch, Gy. |
author_sort |
Péch, Gy. |
title |
A Model to Predict the Moisture Content of Reindeer Lichen |
title_short |
A Model to Predict the Moisture Content of Reindeer Lichen |
title_full |
A Model to Predict the Moisture Content of Reindeer Lichen |
title_fullStr |
A Model to Predict the Moisture Content of Reindeer Lichen |
title_full_unstemmed |
A Model to Predict the Moisture Content of Reindeer Lichen |
title_sort |
model to predict the moisture content of reindeer lichen |
publisher |
Oxford University Press (OUP) |
publishDate |
1989 |
url |
http://dx.doi.org/10.1093/forestscience/35.4.1014 https://academic.oup.com/forestscience/article-pdf/35/4/1014/22543620/forestscience1014.pdf |
genre |
Reindeer lichen |
genre_facet |
Reindeer lichen |
op_source |
Forest Science volume 35, issue 4, page 1014-1028 ISSN 0015-749X 1938-3738 |
op_doi |
https://doi.org/10.1093/forestscience/35.4.1014 |
container_title |
Forest Science |
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35 |
container_issue |
4 |
container_start_page |
1014 |
op_container_end_page |
1028 |
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1810473994345775104 |