HUSCAP logo Hokkaido Univ. logo

Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Engineering / Faculty of Engineering >
Peer-reviewed Journal Articles, etc >

Characterization of Lightning Occurrence in Alaska Using Various Weather Indices for Lightning Forecasting

Files in This Item:
FINAL Manuscript_JDR format.pdf677.78 kBPDFView/Open
Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/57923

Title: Characterization of Lightning Occurrence in Alaska Using Various Weather Indices for Lightning Forecasting
Authors: Farukh, Murad Ahmed Browse this author
Hayasaka, Hiroshi Browse this author →KAKEN DB
Kimura, Keiji Browse this author
Keywords: Lightning severity
LIFT
Environmental temperatures
Ordinary cell thunderstorm
Moisture
Issue Date: Jun-2011
Publisher: Fuji Technology Press
Journal Title: Journal of Disaster Research
Volume: 6
Issue: 3
Start Page: 343
End Page: 355
Abstract: Alaska lost 10% of its forest area due to vigorous forest fires in 2004 and 2005. Repeated lightning-caused forest fires annoy residents and influencing earth’s atmosphere in every fire season. The authors have reported on the weather conditions of Alaska’s most severe lightning occurrence in mid June 2005. This paper examines a range of weather indices like soar, instability, ‘dry lightning’ and others to the factors that could clearly explain lightning characteristics in Alaska. First, lightning occurrence days from May to September were classified into ‘non or small lightning’ days and ‘lightning’ days to determine threshold values. Second, ‘lightning’ days were categorized into ‘less severe’, ‘severe’, ‘very severe’, and ‘extremely severe’ to notice controlling factors on the lightning severity. Based on this analysis, the lifted index (LIFT) was selected as sensitive to assess upper air instability, and Te850 (environmental temperature at 850hPa) was selected as sensitive to assess warm and moist air masses. Finally, the possibilities of lightning forecasts in Alaska are discussed using lightning occurrence and LIFT and Te850 in 2005. As there is a time-lag between LIFT measurements (14:00) and the lightning peak (~17:00), and around one day time-lag between Te850 and lightning occurrence, lightning forecasts using LIFT and Te850 could provide a simply applicable forecast index for Alaska.
Type: article (author version)
URI: http://hdl.handle.net/2115/57923
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 早坂 洋史

Export metadata:

OAI-PMH ( junii2 , jpcoar )

MathJax is now OFF:


 

 - Hokkaido University