کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4445446 1311288 2005 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
QBO and QTO of the atmospheric trace element carbon dioxide—an update
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علم هواشناسی
پیش نمایش صفحه اول مقاله
QBO and QTO of the atmospheric trace element carbon dioxide—an update
چکیده انگلیسی

An analysis of CO2 (carbon dioxide) concentrations (monthly values and their 12-month running means) at various locations during 1970–2001 indicated a general increase of ∼10% in 2–3 decades. It was not uniform and was smaller (only ∼1.5% in 5 years) during 1990–1995. When the long-term (3 years or more) variation was estimated by calculating 3-year running means and was subtracted from the 12-month running means, small oscillations (range less than 0.2%) were noticed with peak spacings in the QBO, QTO (quasi-biennial and quasi-triennial oscillations, 2–3 and 3–4 year) ranges. In latitudes north of ∼30°N, the peaks resembled the QBO of stratospheric low latitude winds (peak spacings of ∼28 months). For latitudes south of 30°N, CO2 changes seemed to be associated with ENSO phenomenon, though the major El Niños of 1982–1983 and 1997–1998 seemed to have caused abnormal variations (∼exceeding 0.2%) only in one or two latitude belts.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Atmospheric Environment - Volume 39, Issue 14, May 2005, Pages 2559–2569
نویسندگان
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