The blizzard hit central eastern america again
Since the winter of 2014, united states blizzards have changed their normality and come in frequent, with some parts of the country experiencing a record snowfall breakthrough and 20 blizzard weather processes. Of these, there were six large-scale blizzard weather processes with high frequency, snow volume and low temperature. From 3 to 8 january 2015, extreme cold weather in the central east of the united states reduced the lowest temperature in parts to -45°c; on 1 february, snow fell to 41 centimetres at the chicago o'hare international airport, setting a new record of 49 centimetres in parts of chicago. As of 2 march, boston accumulated 2. 6 metres of snow, exceeding the 1995-1996 winter record. Owing to severe weather conditions, extensive flights were cancelled and delayed throughout the united states, multiple highways were closed and public schools in new york, boston and elsewhere were suspended, resulting in at least 11 deaths due to weather conditions. Cold winter weather has prevented many businesses from starting their work normally, the transport environment has been hampered and the commercial supply chain has been broken, while discouraging investors ' willingness to go out for consumption. In addition, additional heating costs incurred by the population to cope with cold weather have led to the crowding out of funds that should have been spent on personal consumption. The blizzard has caused huge economic losses to the united states, and why has it become a blizzard in the winter
(100 degrees map -- united states topographic map)
As can be seen from the united states map, the eastern and western parts of the united states have mountains on both sides, and the mountains are moving north-south, with large large plains in the middle, high east-west and low mid-west, with no east-west mountains, open north-south, and cold air at mid-latitudes rapidly south in winter. At the same time, the united states has the world's largest five freshwater lakes in the north-eastern part of the world, and the great lakes region has a “great lakes effect” (meaning that cold air comes into contact with the relatively warm surfaces of the water from which large areas of unfrozen water surfaces (usually lakes) are derived, followed by precipitation, usually in the form of snow, on the banks of windward lakes)。
This makes the united states highly vulnerable to low-temperature and blizzard weather during the winter, influenced by natural geographical factors such as weather and topography。
Author: guo xiaoqing
