Baltic  Sea  Ice  Climate  Workshop  2005

44

strong  wind  speed  (7-9  m/s)  and  hence  the  wind  direction  is  more  important  than  the  wind
speed  for  the  ice  deformation  during  winter  2002/03.

>■  O.OM
~r\

0.0CK2S

o

■o
<L>
£

0.002

.g  0.0013

o
Cl
-i—r
a

0.001

3=  0.0005
Q
o

0  M  100  150  200  250  3»  550
Wind  direction  (deg)

Fig.  6.  Deformed  ice  growth  rate  and  wind  direction.  The  numbers  on  the  plot  are  date.

Conclusions
The  correlations  were  found  between  the  wind  direction,  wind  speed  and  deformed  ice  growth
rate.  The  strongest  wind  blow  from  SW  and  NNE  in  winter  2003.  The  most  intensive  ridging
events  occurs  during  wind  blowing  from  SW,  SE  and  NW.  The  growth  rate  of  deformed  ice  was
not  strongly  dependent  on  wind  speed.  The  mean  total  concentration  of  deformed  ice  was  up  to
12%  from  the  area  of  Gulf  of  Finland.  The  modelled  largest  fraction  of  the  deformed  ice  was
located  at  26.5-28  E.  Comparatively  less  deformed  ice  was  produced  at  25.5-26.5E.