3 
CONTENTS 
Preface 5 
List of participants 9 
Program 13 
History of Baltic Sea Ice Climate Workshops 
Matti Leppàranta 15 
Influence of the Temperature on Ice Conditions in the Bay of Bothnia (Baltic Sea) 
Élise Lépy. 23 
Sea Ice Station Umeà, Winter 2005 
Matti Leppàranta, Kunio Shirasawa, Jari Uusikivi, Keguang Wang, Olli-Pekka Mattila 
and Antti Kangas 29 
Analysis of the Ice Model Simulation for the Gulf of Finland in 2002/2003 
Ove Pam and Jari Haapala 37 
Ice Winter Severity in the Western Baltic Sea in the Period 1301-1500 
Gerhard Koslowski and Natalija Schmelzer. 47 
Sea Ice Conditions in Gulf of Gdansk in 15 century 
Marzenna Sztobryn 57 
Some Ideas on Sea Ice Climate and Navigation in the Baltic Sea 
Klaus Strübing 67 
Reconstruction of Annual Maximum Ice Extent in the Baltic Sea 1660-2005 
Lars Axell and Katarina Lindquist. 79 
Numerical Sea Ice Forecast Experiment of PIC Model for the Bohai Sea (Abstract) 
LIU Yu, BAI Shan, LIU Qinzheng and WU Huiding 81 
Sensitivity of Arctic Sea ice in Rossby Centre numerical models (Abstract) 
Ralf Dôscher, Markus Meier and Klaus Wyser. 83