Latitude Considerations in Adapting the Canadian Forest Fire Weather Index System for Use in Other Countries. Alexander, M. E. In Lawson, B. D. & Armitage, O. B., editors, Weather Guide for the Canadian Forest Fire Danger Rating System, pages 67–73. Natural Resources Canada, Canadian Forest Service, Northern Forestry Centre. ![Latitude Considerations in Adapting the Canadian Forest Fire Weather Index System for Use in Other Countries [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper abstract bibtex [Excerpt: Introduction] Latitude, along with season or time of year, influences the effective day length [...] and thereby the amount of drying that occurs on any given day. For example, a day in June in British Columbia at 54° latitude has almost twice the drying power as a day in September with the same weather conditions [...]. [\n] In the development of the Canadian Forest Fire Weather Index (FWI) System, these seasonal effects were accounted for in the Duff Moisture Code (DMC) by an effective day length factor (Le) and in the Drought Code (DC) by a seasonal day length adjustment factor (Lf). Details regarding the derivation of Le and Lf were presented by Van Wagner (1970) and Turner (1972), respectively, and will not be covered here, except to say that the derivation of both factors was largely empirical, although for the DMC, “The daylength, varying with season, has an effect roughly proportional to three less than the number of hours between sunrise and sunset” (Van Wagner 1987). [\n] The FWI System was originally designed for the range of fuel and weather conditions found in Canada. However, increasing foreign use of the FWI System and the Canadian Forest Fire Danger Rating System (CFFDRS) has dictated that certain international standards be established. The purpose of this appendix is to discuss how day length considerations in the calculation of the DMC and the DC should be handled for locations outside of Canada. [\n] [....]
@incollection{alexanderLatitudeConsiderationsAdapting2008,
title = {Latitude Considerations in Adapting the {{Canadian Forest Fire Weather Index System}} for Use in Other Countries},
booktitle = {Weather Guide for the {{Canadian}} Forest Fire Danger Rating System},
author = {Alexander, Marty E.},
editor = {Lawson, B. D. and Armitage, O. B.},
date = {2008},
pages = {67--73},
publisher = {{Natural Resources Canada, Canadian Forest Service, Northern Forestry Centre}},
location = {{Edmonton, Alberta, Canada}},
url = {https://tinyurl.com/qttjykz},
abstract = {[Excerpt: Introduction] Latitude, along with season or time of year, influences the effective day length [...] and thereby the amount of drying that occurs on any given day. For example, a day in June in British Columbia at 54° latitude has almost twice the drying power as a day in September with the same weather conditions [...].
[\textbackslash n] In the development of the Canadian Forest Fire Weather Index (FWI) System, these seasonal effects were accounted for in the Duff Moisture Code (DMC) by an effective day length factor (Le) and in the Drought Code (DC) by a seasonal day length adjustment factor (Lf). Details regarding the derivation of Le and Lf were presented by Van Wagner (1970) and Turner (1972), respectively, and will not be covered here, except to say that the derivation of both factors was largely empirical, although for the DMC, “The daylength, varying with season, has an effect roughly proportional to three less than the number of hours between sunrise and sunset” (Van Wagner 1987).
[\textbackslash n] The FWI System was originally designed for the range of fuel and weather conditions found in Canada. However, increasing foreign use of the FWI System and the Canadian Forest Fire Danger Rating System (CFFDRS) has dictated that certain international standards be established. The purpose of this appendix is to discuss how day length considerations in the calculation of the DMC and the DC should be handled for locations outside of Canada.
[\textbackslash n] [....]},
isbn = {978-1-100-11565-8},
keywords = {~INRMM-MiD:z-MBDA6A6I,drought-code,droughts,duff-moisture-code,empirical-equation,fire-danger,fire-danger-rating,fire-weather-index,forest-fires,fuel-moisture,latitude,solar-radiation,wildfires}
}
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