کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5780589 1413828 2016 26 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Diffusive summer methane flux from lakes to the atmosphere in the Alaskan arctic zone
ترجمه فارسی عنوان
تابش متان تابشی تابش از دریاچه ها به جو در ناحیه قطبی آلاسکا
کلمات کلیدی
متان، دریاچه ها، طول عمر فروتن، توندرا، آلاسکا،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علوم زمین و سیاره ای (عمومی)
چکیده انگلیسی
Dissolved methane concentrations (DM) in thirty lakes along Dalton Highway were measured in the open water season in 2008 and in 2012 to estimate diffusive flux from lake surfaces and to verify the enhancive effect of thawing permafrost on flux in the Alaskan arctic zone. An inverse relationship between lake size and DM was obtained in lakes in the regions as was found for European boreal lakes. There was no evidence indicating an effect of thawing permafrost on DM in these lakes. DM in lakes in the taiga region, however, were higher than those in the tundra region. All lake images on a map larger than 0.001 km2 were analyzed, and the area and number distributions were obtained in order to calculate regional mass fluxes of diffusive methane. The total area of all lakes (339,733) in the Alaskan Arctic zone (northern region from 64.00°N) is 25.5 × 103 km2. Regional summer diffusive flux of methane from lakes in the Alaskan arctic zone was estimated to be 22 Gg CH4 yr−1. Average diffusive flux density (per lake area) was 0.86 g CH4 m−2 yr−1, which is similar to that in European boreal lakes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polar Science - Volume 10, Issue 3, September 2016, Pages 303-311
نویسندگان
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