Tham khảo tài liệu 'climate management - solving the problem part 3', khoa học tự nhiên, địa lý phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 42 CLIMATE MANAGEMENT and Europe would be on average 9 F 5 C cooler. If this extensive current were to shut down it would have a negative impact on the entire ocean atmospheric system and cause adverse effects worldwide not only in ocean circulation but also in the jet stream in the atmosphere that drives storm systems. Based on evidence retrieved from ice cores in Greenland scientists have determined that the THC has been shut down in the past and that every time it has been shut down an abrupt climate change has occurred. The chief mechanism for shutting down the THC is the addition of freshwater. The report goes on to analyze how an abrupt climate change scenario could potentially de-stabilize the geopolitical environment leading to skirmishes battles and even war due to resource constraints such as 1. Food shortages due to decreases in net global agricultural production 2. Decreased availability and quality of freshwater in key regions due to shifted precipitation patterns causing more frequent floods and drought 3. Disrupted access to energy supplies due to extensive sea ice and storminess. As these conditions persist and global and local carrying capacities are reduced tensions could mount around the world leading to two principal strategies defensive and offensive. Nations that have the resources and are in a position to do so may build fortresses around their countries protecting and keeping the resources for themselves. Less fortunate nations especially those who share borders with warring nations may engage in battle for access to food clean water or energy. Unlikely alliances could be formed as defense priorities shift and the goal becomes resources for survival instead of religion ideology or national honor. If these chains of events were to occur it would pose new challenges for the United States. Randall and Schwartz suggest that in order to be prepared to deal with such changes it is important that the United States The . Political Arena 43 .
