关键词: 硅藻土, 硅藻土, 废水处理, 吸附, 行业废水, 城镇污水

Abstract: [Objective][Method]There is no winter throughout the year in Hainan island. The abnormal cold winter often have adverse effect to the tropical fruit, rubber trees and other agricultural and tourism. Using the monthly mean temperature observation data from Hainan province Nearly 40 years and the NCEP/NCAR reanalysis datasets of 1977-2017 and NOAA ERSST date and Nino3.4 index and AO index and 74 circulation index from National Climate Center, this paper study the atmospheric circulation characteristics of the cold winter and its application in the trend forecast of cold winter temperature. [Result]The results show that: The temperature of winter over Hainan has the interannual characteristic. In recent years, the cold winter appeared 12 years and happened frequently. During the cold winter, the cold high pressure in low level and the East Asian winter monsoon strengthen. The ENSO and AO index can be used in the cold winter forecast. [Conclusion]The collective effect of cold phase of ENSO index and positive phase of AO index is beneficial to lead to low temperature over Hainan and then causing the cold winter. In addition,the accuracy of the regression forecast equation established by the atmospheric circulation index can be well used in the cold winter temperature trend forecast.