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Trends and Variability of Storminess n the NE Atlantic-European region, 1874-2007 Xiaolan L. Wang, Francis, W. Zwiers, Val R. Swail, and Yang Feng Climate Research Division, Environment Canada

Trends and Variability of Storminess in the NE Atlantic-European region, 1874-2007

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Trends and Variability of Storminess in the NE Atlantic-European region, 1874-2007. Xiaolan L. Wang, Francis, W. Zwiers, Val R. Swail, and Yang Feng Climate Research Division, Environment Canada. Pressure triangles in the NE Atlantic-European region (similar to Alexandersson et al. 2000). - PowerPoint PPT Presentation

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Page 1: Trends and Variability of Storminess  in the NE Atlantic-European region, 1874-2007

Trends and Variability of Storminess in the NE Atlantic-European region, 1874-2007

Xiaolan L. Wang, Francis, W. Zwiers, Val R. Swail, and Yang Feng

Climate Research Division, Environment Canada

Page 2: Trends and Variability of Storminess  in the NE Atlantic-European region, 1874-2007

15E

60N

15W

Aberdeen

Prestwick

Torshavn

Stykkisholmur

de Bilt

Bergen

Vestervig

Nordby

Valentia

Jan Mayen

Bodo

Pressure triangles in the NE Atlantic-European region(similar to Alexandersson et al. 2000)

Page 3: Trends and Variability of Storminess  in the NE Atlantic-European region, 1874-2007

Area averages - 10 triangles in the region(similar to Alexandersson et al. 2000)

Annualpercentiles

However, there are significant seasonality and regional differences

11-point Gaussian low-pass filtered curves

Page 4: Trends and Variability of Storminess  in the NE Atlantic-European region, 1874-2007

15E

60N

15W

Stykkisholmur

Aberdeen

Torshavn

de Bilt

Bergen

Vestervig

Nordby

Valentia

Jan Mayen

Bodo

a. Winter (DJF) 99th percentiles

NTB

APVD

JTBJST

VST

VTAP

BBV

DAPV

APTB

BAPV

BTB

Page 5: Trends and Variability of Storminess  in the NE Atlantic-European region, 1874-2007

15E

60N

15W

Stykkisholmur

Aberdeen

Torshavn

de Bilt

Bergen

Vestervig

Nordby

Valentia

Jan Mayen

Bodo

b. Summer (JJA) 99th percentiles

NTB

APVD

JTBJST

VST

VTAP

BBV

DAPV

APTB

BAPV

BTB

Page 6: Trends and Variability of Storminess  in the NE Atlantic-European region, 1874-2007

Winter(DJF)

seasonalpercentiles

Summer(JJA)

seasonalpercentiles

Area averages - four triangles over the North Sea

Page 7: Trends and Variability of Storminess  in the NE Atlantic-European region, 1874-2007

15E

60N

15W

Stykkisholmur

Aberdeen

Torshavn

de Bilt

Bergen

Vestervig

Nordby

Valentia

Jan Mayen

Bodo

c. Spring (MAM) 99th percentiles

NTB

APVD

JTBJST

VST

VTAP

BBV

DAPV

APTB

BAPV

BTB

Page 8: Trends and Variability of Storminess  in the NE Atlantic-European region, 1874-2007

15E

60N

15W

Stykkisholmur

Aberdeen

Torshavn

de Bilt

Bergen

Vestervig

Nordby

Valentia

Jan Mayen

Bodo

NTB

d. Autumn (SON) 99th percentiles

NTB

APVD

JTBJST

VST

VTAP

BBV

DAPV

APTB

BAPV

BTB

Page 9: Trends and Variability of Storminess  in the NE Atlantic-European region, 1874-2007

Acknowledgements.

The authors wish to thank Dr. Gil Compo and other members of the

ISPD Working Group for providing us the in-situ pressure data analyzed

in this study.