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Fourth Study Conference on BALTEX Scala Cinema Gudhjem

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characteristics of precipitati<strong>on</strong> over European c<strong>on</strong>tinent<br />

during different phases of the North Atlantic Oscillati<strong>on</strong>.<br />

Results show that although the NAO-related variability is<br />

largely resp<strong>on</strong>sible for the precipitati<strong>on</strong> patterns associated<br />

with mid-latitudinal cycl<strong>on</strong>es, there is a significant porti<strong>on</strong><br />

of variance, driven by processes, not associated with NAO.<br />

We also analysed the precipitati<strong>on</strong> patterns and the moisture<br />

transport characteristics during periods of 1960s - 1970s and<br />

the last two decades and found that these periods<br />

dem<strong>on</strong>strate str<strong>on</strong>g differences not <strong>on</strong>ly in the magnitude of<br />

the processes, but also in spatial patterns even under same<br />

(positive or negative) NAO phases, that might result form<br />

the NAO regime shift in the late 1970s.<br />

4. Acknowledgements<br />

This study is supported by Russian Foundati<strong>on</strong> for Basic<br />

Research (grant 02-56331) and the joint project “North<br />

Atlantic Oscillati<strong>on</strong>: regi<strong>on</strong>al impacts <strong>on</strong> European weather<br />

and climate”, funded by Volkswagen Stiftung (Hannover,<br />

Germany).<br />

References<br />

Gulev, S.K., O. Zolina, and S. Grigoriev, Extratropical<br />

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from the NCEP/NCAR Reanalysis data, Clim.<br />

Dynamics, 17, pp. 795-809, 2001.<br />

Ruprecht, E., S. S. Schroeder and S. Ubl, On the relati<strong>on</strong><br />

between NAO and water vapour transport towards<br />

Europe, Meteorologische Zeitschrift, 11, pp. 701-702,<br />

2002.<br />

Woodruff, S.D., H.F. Diaz, J.D. Elms, S.J. Worley, 1998:<br />

COADS Release 2 data and metadata enhancements for<br />

improvements of marine surface flux fields. Phys. Chem.<br />

Earth, 23, 5/6, 517-526.<br />

Zolina, O., and S.K. Gulev, Improving accuracy of mapping<br />

cycl<strong>on</strong>e numbers and frequencies, M<strong>on</strong>. Wea. Rev., 130,<br />

pp. 748-759, 2002.<br />

Zolina, O., A. Kapala, C .Simmer, and S.K. Gulev, 2004:<br />

Analyses of extreme precipitati<strong>on</strong> over Europe from<br />

different reanalyses: A comparative assessment. Global<br />

and Planetary Change, submitted.<br />

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