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Effects of teleconnection patterns on the atmospheric routes, precipitation and deposition amounts in the north-eastern Iberian Peninsula

机译：遥相关模式对伊比利亚东北半岛大气路径，降水和沉积量的影响

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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⁺, NH⁺/4, NO-/3 and SO2/4−). 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 (NH⁺/4, NO-/3 and SO2/4−). 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.
机译：北大西洋涛动（NAO）已被确定为主要影响地中海地区降水和温度随时间变化的一种大气模式。最近，还提出了西地中海涛动（WeMO）来描述伊比利亚东部半岛的降水变化。本文研究了东北伊比利亚半岛记录的化学特征和/或化学沉积量是否受到这些气候变化模式的影响。结果表明，与NAO相比，WeMO在海洋（Cl⁻，Na⁺，Mg²⁺）或人为污染物（H⁺，NH⁺/ 4，NO- / 3和SO2 / 4−）的沉积中具有更重要的作用。 。种源分类显示，在冬季（12月至3月），大西洋的快速气流对应着正的WeMO指数，而负的WeMOi与东北和西南环流相关。 WeMO的负相使空气团从地中海进入伊比利亚半岛，这些空气中富含海洋离子和人为来源的离子（NH 3/4，NO- / 3和SO2-4 /-）。对于后来的这些，这表明来自欧洲南部的受污染空气团在地中海上平流，并且在WeMO负相期间通过降水清除和沉积了这种污染。这将把越境污染物带到伊比利亚东北半岛。但是，当地的污染物也可能造成污染，因为来自地中海和大西洋的降水事件（与WeMO的两个阶段有关）可能合并了该地区典型的冬季反气旋事件在当地累积的排放。

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    Izquierdo Miguel Rebeca;

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  • 年度 2014
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