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Effect of global climate change on cyanobacteria bloom in Taihu Lake |
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Abstract Based on the analysis of 47 years observation data from the 4 weather stations around Taihu Lake, before the 1980's, the annual scale fluctuation of weather condition around Taihu Lake was against the growth of cyanobacteria, while it was becoming propitious for the cyanobacteria after the 1980's, especially after the 1990's with the significant change in air temperature, wind speed and precipitation. The meteorological index of the cyanobacteria bloom was defined, which was proved to be a good reflection of the annual cyanobacteria bloom situation. Furthermore, the relation between the Ni?o3 Index, a reflection of the change in ENSO circulation, and the change in climate conditions of Taihu Lake Basin was studied. An obvious relevance in annual scale between the ENSO circulation and the wind speed/precipitation was indicated in Taihu Lake Basin. During 2000 to 2020, the cyanobacteria bloom index would continue keeping in the high value. If there was no effective control and decrease in the nutrients, the cyanobacteria bloom may continue happening extensively each year in Taihu Lake.
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Received: 26 November 2009
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