کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5780580 | 1413828 | 2016 | 46 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synoptic-scale fire weather conditions in Alaska
ترجمه فارسی عنوان
آتش سوزی در مقیاس آتشسوزی در آلاسکا
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علوم زمین و سیاره ای (عمومی)
چکیده انگلیسی
Recent concurrent widespread fires in Alaska are evaluated to assess their associated synoptic-scale weather conditions. Several periods of high fire activity from 2003 to 2015 were identified using Moderate Resolution Imaging Spectroradiometer (MODIS) hotspot data by considering the number of daily hotspots and their continuity. Fire weather conditions during the top six periods of high fire activity in the fire years of 2004, 2005, 2009, and 2015 were analyzed using upper level (500Â hPa) and near surface level (1000Â hPa) atmospheric reanalysis data. The top four fire-periods occurred under similar unique high-pressure fire weather conditions related to Rossby wave breaking (RWB). Following the ignition of wildfires, fire weather conditions related to RWB events typically result in two hotspot peaks occurring before and after high-pressure systems move from south to north across Alaska. A ridge in the Gulf of Alaska resulted in southwesterly wind during the first hotspot peak. After the high-pressure system moved north under RWB conditions, the Beaufort Sea High developed and resulted in relatively strong easterly wind in Interior Alaska and a second (largest) hotspot peak during each fire period. Low-pressure-related fire weather conditions occurring under cyclogenesis in the Arctic also resulted in high fire activity under southwesterly wind with a single large hot-spot peak.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polar Science - Volume 10, Issue 3, September 2016, Pages 217-226
Journal: Polar Science - Volume 10, Issue 3, September 2016, Pages 217-226
نویسندگان
Hiroshi Hayasaka, Hiroshi L. Tanaka, Peter A. Bieniek,