On the relationships between circulation types and changes in rainfall variability in Greece

被引:89
作者
Maheras, P
Tolika, K
Anagnostopoulou, C
Vafiadis, M
Patrikas, I
Flocas, H
机构
[1] Univ Thessaloniki, Dept Meteorol & Climatol, Thessaloniki 54124, Greece
[2] Univ Thessaloniki, Fac Technol, Div Hydraul, Thessaloniki 54124, Greece
[3] Univ Athens, Dept Appl Phys, Lab Meteorol, Athens, Greece
关键词
Greece; circulation types; trend analysis; multiple regression-cross-validation analysis; daily rainfall; seasonal rainfall; downscaling method;
D O I
10.1002/joc.1088
中图分类号
P4 [大气科学(气象学)];
学科分类号
0706 ; 070601 ;
摘要
An attempt is made to examine rainfall variability over the Greek area in relation to 500 hPa atmospheric circulation. Daily precipitation series from 22 evenly distributed Greek stations have been used for the period 1958-2000, along with he classification scheme of daily circulation types a, 500 hPa for the same period. The seasonal frequency and the trends of circulation types have been calculated. It was found that there is a general positive trend of anticyclonic circulation types and a negative one for cyclonic types. The seasonal trends of rainy days and the precipitation totals have also been calculated and analysed. A general decreasing tendency of winter rainfall is observed; the decreasing trend during autumn and spring is less significant. Concerning the frequency and intensity of rainfall per circulation type, a decreasing tendency becomes evident for the majority of the stations during winter, whereas there is an increasing tendency during autumn, A multiple regression-cross-validation model was developed using the seasonal frequency of circulation types as predictors and the seasonal rainfall totals as predictants. Only the winter modelled precipitation shows a good agreement with the observed precipitation, whereas for the other seasons the agreement is relatively poor. This could be caused by the influence of different factors that are not captured by the classification scheme used. The proposed model could serve as a circulation-based downscaling method that could be further applied to geopotential data available from general circulation models in order to study regional climatological consequences of future climate scenarios. Copyright (C) 2004 Royal Meteorological Society.
引用
收藏
页码:1695 / 1712
页数:18
相关论文
共 33 条
[1]   A HOMOGENEITY TEST APPLIED TO PRECIPITATION DATA [J].
ALEXANDERSSON, H .
JOURNAL OF CLIMATOLOGY, 1986, 6 (06) :661-675
[2]  
Anagnostopoulou C., 2003, Ph.D. Thesis
[3]   Atmospheric circulation and precipitation in Italy for the last 50 years [J].
Brunetti, M ;
Maugeri, M ;
Nanni, T .
INTERNATIONAL JOURNAL OF CLIMATOLOGY, 2002, 22 (12) :1455-1471
[4]  
DELFINER P, 1975, DISPLAY ANAL SPATIAL, P96
[5]   A 40-year climatological study of relative vorticity distribution over the Mediterranean [J].
Flocas, HA ;
Maheras, P ;
Karacostas, TS ;
Patrikas, I ;
Anagnostopoulou, C .
INTERNATIONAL JOURNAL OF CLIMATOLOGY, 2001, 21 (14) :1759-1778
[6]   Heavy precipitation processes in a warmer climate [J].
Frei, C ;
Schar, C ;
Luthi, D ;
Davies, HC .
GEOPHYSICAL RESEARCH LETTERS, 1998, 25 (09) :1431-1434
[7]   Links between circulation and changes in the characteristics of Iberian rainfall [J].
Goodess, CM ;
Jones, PD .
INTERNATIONAL JOURNAL OF CLIMATOLOGY, 2002, 22 (13) :1593-1615
[8]  
Goodess CM, 1998, INT J CLIMATOL, V18, P1051, DOI 10.1002/(SICI)1097-0088(199808)18:10<1051::AID-JOC304>3.0.CO
[9]  
2-1
[10]   Estimation of transboundary air pollution on the basis of synoptic-scale weather types [J].
Helmis, CG ;
Moussiopoulos, N ;
Flocas, HA ;
Sahm, P ;
Assimakopoulos, VD ;
Naneris, C ;
Maheras, P .
INTERNATIONAL JOURNAL OF CLIMATOLOGY, 2003, 23 (04) :405-416