The ice conditions were getting worse at a high speed, as in a short time, the floating ice in the Liaodong Bay extended its scale from 38 sea miles to 71 sea miles, and of the floating ice in the Laizhou Bay grew from 16 sea miles to 46 sea miles, the largest sea ice scale in the last 40 years. 
The ice disaster in the winters of 2009 and 2010 in the Bohai Sea and the northern part of the Yellow Sea had serious impact on society and economy of coastal areas and caused huge losses. It affected 61.000 people in the three provinces Liaoning, Hebei and Shandong and the city of Tianjin, destroyed 7,157 ships, froze 296 ports and docks and damaged 207,870 hectares of aquaculture. The direct economic loss was summed up to RMB 6.318 billion. 
Sea Level Rise 
The rise of the sea level is a slow onset natural disaster, and a global phenomenon caused by global warming, polar ice melting and upper occan heat expansion. The average sea level from 1975 to 1986 is defined by the international community as the annual mean sea level. The margin of sea level rise is a numerical value by which the sea level rises or drops compared with the annual average sea level. The global sea level has risen by 10 to 20 centimeters in the recent years and shows an accelerating rise tendency. However, actual changes of the sea level in a given area of the world are also conditioned by local vertical land movements: slow crustal movements and local ground subsidence. As a slow-onset marine disaster,the cumulative effects of long-term sea level rise will aggravate the disaster severity of storm tides, coastal erosion, sea water intrusion, soil salinization,salt water intrusion and other marine disasters and cause related disasters