کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6340238 1620382 2014 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of teleconnection patterns on the atmospheric routes, precipitation and deposition amounts in the north-eastern Iberian Peninsula
ترجمه فارسی عنوان
اثرات الگوی تلفیقی بر روی مسیرهای جوی، بارش و میزان رسوب در شبه جزیره شمال شرقی سواحل اقیانوس آرام
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علم هواشناسی
چکیده انگلیسی


- WeMO index better describes winter precipitation in the NE Iberian Peninsula than NAO.
- Element deposition was correlated with NAO and WeMO depending on air provenance.
- Few studies have analyzed the relationship between rain chemistry vs. NAO and WeMO.

The North Atlantic Oscillation (NAO) has been identified as one of the atmospheric patterns which mostly influence the temporal evolution of precipitation and temperature in the Mediterranean area. Recently, the Western Mediterranean Oscillation (WeMO) has also been proposed to describe the precipitation variability in the eastern Iberian Peninsula. This paper examines whether the chemical signature and/or the chemical deposition amounts recorded over NE Iberian Peninsula are influenced by these climatic variability patterns. Results show a more relevant role of the WeMO compared to NAO in the deposition of either marine (Cl−, Na+, Mg2+) or anthropogenic pollutants (H+, NH4+, NO3− and SO42−). A cluster classification of provenances indicated that in winter (December to March) fast Atlantic air flows correspond to positive WeMO indices, while negative WeMOi are associated to Northeastern and Southwestern circulations. The negative phase of WeMO causes the entry of air masses from the Mediterranean into the Iberian Peninsula, that are enriched with marine ions and ions of anthropogenic origin (NH4+, NO3− and SO42−). For these later, this suggests the advection over the Mediterranean of polluted air masses from southern Europe and the scavenging and deposition of this pollution by precipitation during the WeMO negative phases. This will carry transboundary pollutants to the NE Iberian Peninsula. However, local pollutants may also contribute, as precipitation events from the Mediterranean and the Atlantic (associated to both WeMO phases) may incorporate emissions that accumulate locally during the winter anticyclonic episodes typical of the region.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Atmospheric Environment - Volume 89, June 2014, Pages 482-490
نویسندگان
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