Climatic Cycles and Gradients of the El Niño Core Region in North Peru
Climatic processes in northern Peru are evaluated on surface observation independent of modelling studies. The region is characterized by regular oscillations, but episodic El Niño-events introduce strong disturbances. Conceptual models based on observations, remote sensing data, and output of regio...
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | Advances in Meteorology |
| Online Access: | http://dx.doi.org/10.1155/2015/750181 |
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| author | Rütger Rollenbeck Fabian Bayer Jannes Münchow Michael Richter Rodolfo Rodriguez Nestor Atarama |
| author_facet | Rütger Rollenbeck Fabian Bayer Jannes Münchow Michael Richter Rodolfo Rodriguez Nestor Atarama |
| author_sort | Rütger Rollenbeck |
| collection | DOAJ |
| description | Climatic processes in northern Peru are evaluated on surface observation independent of modelling studies. The region is characterized by regular oscillations, but episodic El Niño-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 Niño-conditions is possibly caused by disruptions of the regional circulation. |
| format | Article |
| id | doaj-art-213245c74bfb4cf2b91e390d7c6ee1c8 |
| institution | Kabale University |
| issn | 1687-9309 1687-9317 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Meteorology |
| spelling | doaj-art-213245c74bfb4cf2b91e390d7c6ee1c82025-02-03T06:13:52ZengWileyAdvances in Meteorology1687-93091687-93172015-01-01201510.1155/2015/750181750181Climatic Cycles and Gradients of the El Niño Core Region in North PeruRütger Rollenbeck0Fabian Bayer1Jannes Münchow2Michael Richter3Rodolfo Rodriguez4Nestor Atarama5Laboratory for Climatology and Remote Sensing (LCRS), Faculty of Geography, University of Marburg, 35032 Marburg, GermanyLaboratory for Climatology and Remote Sensing (LCRS), Faculty of Geography, University of Marburg, 35032 Marburg, GermanyInstitute of Geography, University of Erlangen-Nuremberg, 91052 Erlangen, GermanyInstitute of Geography, University of Erlangen-Nuremberg, 91052 Erlangen, GermanyFacultad de Ingeneria, Universidad de Piura, Piura 20000, PeruFacultad de Ingeneria, Universidad de Piura, Piura 20000, PeruClimatic processes in northern Peru are evaluated on surface observation independent of modelling studies. The region is characterized by regular oscillations, but episodic El Niño-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 Niño-conditions is possibly caused by disruptions of the regional circulation.http://dx.doi.org/10.1155/2015/750181 |
| spellingShingle | Rütger Rollenbeck Fabian Bayer Jannes Münchow Michael Richter Rodolfo Rodriguez Nestor Atarama Climatic Cycles and Gradients of the El Niño Core Region in North Peru Advances in Meteorology |
| title | Climatic Cycles and Gradients of the El Niño Core Region in North Peru |
| title_full | Climatic Cycles and Gradients of the El Niño Core Region in North Peru |
| title_fullStr | Climatic Cycles and Gradients of the El Niño Core Region in North Peru |
| title_full_unstemmed | Climatic Cycles and Gradients of the El Niño Core Region in North Peru |
| title_short | Climatic Cycles and Gradients of the El Niño Core Region in North Peru |
| title_sort | climatic cycles and gradients of the el nino core region in north peru |
| url | http://dx.doi.org/10.1155/2015/750181 |
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