List of Tables 
305 
List of Tables 
Atmospheric Circulation 
Table 2-1: Product survey. As to support assessments of recent states and evolutions, 
most figures include climatological information (from the base period 1971-2000) 
on the variables’ changeability on individual time scales (dd, mm, ...). References to 
figures and tables are clickable targets in the pdf-version of this document. 40 
Table 2-2: Calendar of daily weather types in 2008. Red: C & CDIR; Blue: A & ADIR; Bold 
(+, ++): Gale (severe, very severe) 43 
Table 2-3: Contingency table of weather types in 2008 (%) 43 
Table 2-4: Calendar of daily weather types in 2009. Red: C & CDIR; Blue: A & ADIR; Bold 
(+, ++): Gale (severe, very severe) 44 
Table 2-5: Contingency table of weather types in 2009 (%) 44 
Table 2-6: Calendar of daily weather types in 2010. Red: C & CDIR; Blue: A & ADIR; Bold 
(+, ++): Gale (severe, very severe) 45 
Table 2-7: Contingency table of weather types in 2010 (%) 45 
Table 2-8: Calendar of daily weather types in 2011. Red: C & CDIR; Blue: A & ADIR; Bold 
(+, ++): Gale (severe, very severe) 46 
Table 2-9: Contingency table of weather types in 2011 (%) 46 
Table 2-10: Calendar of reduced weather types in 2008 47 
Table 2-11: Monthly frequencies of reduced weather types in 2008 47 
Table 2-12: Calendar of reduced weather types in 2009 48 
Table 2-13: Monthly frequencies of reduced weather types in 2009 48 
Table 2-14: Calendar of reduced weather types in 2010 49 
Table 2-15: Mon thly frequencies of reduced wea ther types in 2010 49 
Table 2-16: Calendar of reduced weather types in 2011 50 
Table 2-17: Monthly frequencies of reduced weather types in 2011 50 
Table 2-18: Seasonal and annual relative frequencies of reduced weather types from 
2008 through 2011 51 
Table 2-19: Weather-type transitions for base period 1971-2000 (NCEP). 0: Count ma 
trix of rounded transition frequencies for the climatological year. P: Transition matrix 
of 1. order Markov chain, obtained from 0 via o^/RS,); n: Eigenvector (n-nP), stati 
onary (unconditional climatological) distribution. E: Embedded transition matrix (wit- 
hout sojourn times, from 0 as P for $¡¡=0) 56 
Table 2-20: As Table 2-19, except for the years 2008 (top) through 2011 (bottom) 58 
Table 2-21: North Sea Wind. Seasonal and annual statistics: Means and standard devi 
ations (m/s) for zonal (u, s u ) and meridional wind components (v, s v ), vector wind and 
direction (V, Vdir), velocity (Vel), persistence (V/Vel in %), and „area“ of 50 %-proba- 
bility ellipse (FE 50 - 1.3863 ns a s b in J/kg). Directional terms are based on a 16 point 
compass; directional classification of seasonal SLP fields (e. g. Figure 2-9) employs 
identical numerical data, but an 8 point compass, only. 69 
Table 2-22: North Sea Wind. Monthly statistics: Wind direction, vector (V) and scalar (Vel) 
wind speed (m/s) and persistence (V/Vel in %). The comment on directional terms 
given in the caption of Table 2-21 applies mutatis mutandis 70 
Table 2-23: Number of severe and very severe gale days fSG| VSG) 73 
Table 2-24: Total number of gale days (G+SG+VSG) 74