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Title: An analysis of teleconnections in the Mediterranean region using RegCM4

Abstract

Atmospheric teleconnections have an important influence on the variability of the Mediterranean climate. This region has a unique and sensitive climate due to its complex topography and atmospheric circulation, thus making it challenging in climate simulations. This article focuses on the representation of five teleconnections in and around the Mediterranean region and how they affect one another and the region. The Regional Climate Model, RegCM4, has been used to simulate the climate from 1969 to 1999 for a domain covering the Mediterranean and the surrounding region. A generalized method for calculating the indices for these patterns was identified and the corresponding indices were constructed from the modelled data and compared with reanalysis data. The modelled data was found to be highly correlated with the 20th Century Reanalysis data and the probability density functions (PDFs) were very similar to the reanalysis data, showing that the teleconnections were successfully represented within the model. Maps of the influence of these teleconnections on temperature, precipitation and wind were also comparable to the reanalysis data, thereby suggesting that model data can be used for future projections of teleconnections and their effects on these parameters. With the use of this high-resolution data, inter-pattern relationships suggested inmore » previous studies (such as that between the Mediterranean Oscillation and North sea-Caspian Pattern) became more evident. This article also shows how the influence of teleconnections on winds affects the circulation and hence the temperature and precipitation of the region.« less

Authors:
 [1];  [1]
  1. Department of Physics, University of Malta, Msida Malta
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1565410
Resource Type:
Journal Article
Journal Name:
International Journal of Climatology
Additional Journal Information:
Journal Volume: 36; Journal Issue: 2; Journal ID: ISSN 0899-8418
Publisher:
Royal Meteorological Society
Country of Publication:
United States
Language:
English
Subject:
Meteorology & Atmospheric Sciences

Citation Formats

Ciarlo`, James M., and Aquilina, Noel J. An analysis of teleconnections in the Mediterranean region using RegCM4. United States: N. p., 2015. Web. doi:10.1002/joc.4383.
Ciarlo`, James M., & Aquilina, Noel J. An analysis of teleconnections in the Mediterranean region using RegCM4. United States. doi:10.1002/joc.4383.
Ciarlo`, James M., and Aquilina, Noel J. Mon . "An analysis of teleconnections in the Mediterranean region using RegCM4". United States. doi:10.1002/joc.4383.
@article{osti_1565410,
title = {An analysis of teleconnections in the Mediterranean region using RegCM4},
author = {Ciarlo`, James M. and Aquilina, Noel J.},
abstractNote = {Atmospheric teleconnections have an important influence on the variability of the Mediterranean climate. This region has a unique and sensitive climate due to its complex topography and atmospheric circulation, thus making it challenging in climate simulations. This article focuses on the representation of five teleconnections in and around the Mediterranean region and how they affect one another and the region. The Regional Climate Model, RegCM4, has been used to simulate the climate from 1969 to 1999 for a domain covering the Mediterranean and the surrounding region. A generalized method for calculating the indices for these patterns was identified and the corresponding indices were constructed from the modelled data and compared with reanalysis data. The modelled data was found to be highly correlated with the 20th Century Reanalysis data and the probability density functions (PDFs) were very similar to the reanalysis data, showing that the teleconnections were successfully represented within the model. Maps of the influence of these teleconnections on temperature, precipitation and wind were also comparable to the reanalysis data, thereby suggesting that model data can be used for future projections of teleconnections and their effects on these parameters. With the use of this high-resolution data, inter-pattern relationships suggested in previous studies (such as that between the Mediterranean Oscillation and North sea-Caspian Pattern) became more evident. This article also shows how the influence of teleconnections on winds affects the circulation and hence the temperature and precipitation of the region.},
doi = {10.1002/joc.4383},
journal = {International Journal of Climatology},
issn = {0899-8418},
number = 2,
volume = 36,
place = {United States},
year = {2015},
month = {6}
}

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