Climatic Cycles and Gradients of the El Niño Core Region in North Peru
Climatic Cycles and Gradients of the El Niño Core Region in North Peru
复制标题
秘鲁北部厄尔尼诺核心区的气候周期和梯度
DOI：
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Nestor Atarama
中科院分区：
文献类型：
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作者：
R. Rollenbeck;Fabian Bayer;Jan Münchow;M. Richter;R. Rodríguez;Nestor Atarama
Climatic processes in northern Peru are evaluated on surface observation independent of modelling studies. The region is characterized by regular oscillations, but episodic El Nino-events introduce strong disturbances. Conceptual models based on observations, remote sensing data, and output of regional climate models are compared with data from a new station network. The results show regular oscillations of all climate variables on the annual and daily time scale. The daily cycle is probably associated with thermotidal forcings, causing gravity waves to emanate from the Andes Cordillera. Main factors are the interaction of large scale pressure systems like the Southeast Pacific High and the intertropical convergence zone (ITCZ). Also, there are regional factors: an extended sea-breeze system, the barrier-effect of the Andes, additional energy input by elevated radiation absorption at the mountain slopes, local wind systems, and the variations of the sea surface temperature. At the coast, a low-level jet works as a thermodynamic energy sink, suppressing deep convection and supporting the aridity. Those patterns are found in most of the station data and the processes of this climate can generally be confirmed. The overturning of this stable system with the onset of El Nino-conditions is possibly caused by disruptions of the regional circulation.
东南热带太平洋对流层低层昼夜循环的区域模拟研究
影响因子：
4.6
作者：
Toniazzo T
通讯作者：
Toniazzo T