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Air temperature plays an important role in the recruitmen, growth, and formation of cyanobacteria bloom, as well as, the large area outbreak and decline of water bloom in Lake Taihu. In order to find out the relationships between the formation of cy⁃ anobacteria bloom in Lake Taihu and surface temperature, meteorological data and satellite observations of the lake and surrounding areas from 2003 to 2013 were used to perform quantitative analysis in this paper. It is found that there is a wide range of daily aver⁃ age temperature (0-35.0°C)suitable for cyanobacteria bloom appearing. Specifically, when daily average temperature falls between 15.1 and 35.0°C, the frequency of cyanobacteria bloom occurrences increases, leading to the accumulate frequency and accumulate area of cyanobacteria bloom accounted for 85% and 90% , respectively. The large area of cyanobacteria bloom mainly occurs in the daily average temperature range from 20.1 to 35.0°C, with the accumulate frequency and accumulate area accounted for 72% and 73% , respectively. Meanwhile, the probability of cyanobacteria bloom appearance increases as average temperature rising, showing a quadratic positive correlation. Moreover, single average area of cyanobacteria bloom fluctuates near the mean value of tempera⁃ ture, which decreases rapidly when daily average temperature reaches 33°C .It shows that temperature is not the limiting factor for appearance of cyanobacteria bloom after it is resuscitated. Moderate high temperature benefits formation of cyanobacteria bloom, and becomes inhibiting factor when it reaches above 33°C . On the basis of analysis, the relationship to temperature, quantitative in⁃ dicators of four stages of cyanobacteria bloom are identified. These four stages include dormant, recruitmen, growth and decline pe⁃ ∗ 江苏省基础研究计划太湖专项(BK2007745)、江苏省科技支撑计划项目(BE2011840)和江苏省气象局重点项目 (KZ201403)联合资助. 2015 10 22 收稿;2016 01 20 收修改稿. 李亚春(1966~ ),男,硕士,研究员级高级工程 师; E⁃mail: jsqxlyc@ 163.com. 李亚春等:结合卫星遥感技术的太湖蓝藻水华形成温度特征分析 1257 riods, and their initial and final critical temperature are (0°C,5°C),(5°C,15°C),(15°C,30°C) and (30°C,0°C), respectively. Relating to critical temperature, the corresponding date could be pinpointed for the four stages of cyanobacteria bloom. This study provides a basis for the prevention and control of algae bloom.

Applying remote sensing techniques in analysis of temperature features causing cyanobacteria bloom in Lake Taihu