Observatory Records Lesser Hazy Days in Shenzhen
Shenzhen seen its lowest amount of hazy days since 2001 so far. The Shenzhen National Climate Observatory said that as of Tuesday the city only had 54 reports of hazy days in 2012. Which is 30 days less that the amount of hazy days through October of 2011 with an average visibility of 15 kilometers this year which is 0.4 kilometers more than the average compared with the same period last year. In September there were 10 fewer hazy days compared in September of 2011.
The observatory attributed the reduction of hazy days to a stronger atmospheric circulation and monsoon systems coming from the South China Sea which brought clean fresh air to the city together with fewer northerly winds and an increased amount of rainy days in the spring. Although Shenzhen is currently is experiencing a prolonged dry spell in which some scientists are calling the worst that is happening in decades.
The observatory said that the industrial waste and vehicle emissions are said to be the major source of haze in the city, and in October brought greater haze than in other parts of the year. Also Shenzhen is not expected to enter autumn until November this year even with a weak cold front that lowered local temperature this week. The city starts its autumn season when the average temperature in Shenzhen is below 22 degrees Celsius for 5 straight days but recent temperature readings have ranged from 22 to 31 degrees.