Baltic Sea Ice Climate Workshop 2005 
48 
Source material 
1: The reconstruction of ice winter severity in the Western Baltic for the period 1879-2005 is 
based on the accumulated areal ice volume along the German Baltic coast (Koslowski, 1989; 
Schmelzer, 1994). 
m 
40 I- 
1 
35 
30 
25 
20 
15 
10 
Journal notes from signal stations + temperature series + regression equation 
Official observations of day of ice occurrence + regression equation 
I Official observations and measurements of ice 
^ -111111 ■ 111 ■ « 11 ■ I ■ 1111 ■ I 
j L i.l-.l >1. ... 
-4M 
11Tini1111111111 
r^aOOOCDCDOO-i— -i— CMCMOOOO'sl-'Nl-LOLOCOCOh-h-OOOOCDCDO 
COCOCOOOOOCDCDCDCDCDCDCDCDCDCDCDCDCDCDCDCDCDCDCDCDO 
Fig. 2. Accumulated areal ice volume on the German Baltic coast in the period 1879-2005 
2: The reconstruction of ice winter severity in the Western Baltic for the period 1701-1878 is 
based on the accumulated areal ice volume, subdivided into seven classes (ice winter severity 
types), (Koslowski and Glaser, 1995) 
Ice winter index numerals 
in m 
Ice 
Weak 
< 0,50 
0 
Moderate. 
0,50-2,00 
0.1 
Moderate + 
2,01-4,00 
0.3 
Strong. 
4,01-6,00 
0.5 
Strong + 
6,01-9,00 
1 
Very strong 
9,01-20,00 
2 
Extreme 
>20,00 
3 
O 
h- 
OO 
LO 
CM 
CD 
CO 
OO 
o 
"M" 
T— 
OO 
LO 
CM 
CD 
co 
h- 
OO 
CD 
CD 
o 
CM 
CM 
CO 
-M- 
■M" 
LO 
CO 
CO 
h- 
h- 
h- 
h- 
h- 
OO 
OO 
OO 
OO 
OO 
00 
OO 
OO 
OO 
OO 
00 
-1— 
-1— 
-1— 
-1— 
-1— 
-1— 
-1— 
-1— 
-1— 
-1— 
-1— 
-1— 
-1— 
-1— 
-1— 
Fig. 3. Ice winter index numerals 1701 - 1878