摘要
基于中国科学院太湖湖泊生态系统研究站1993年以来的常规监测资料,利用比较与数理统计相关分析方法对太湖地区的太阳辐射和水温变化特征及其对水体叶绿素a浓度的影响进行分析.结果显示,太湖地区太阳总辐射、光合有效辐射、光合有效辐射占总辐射的比例及水温总体上都呈上升的趋势.其中,光合有效辐射的增长速率大于总辐射的增长速率,年际水温增长率春季>秋季>夏季.太阳辐射及水温的年内变化呈夏季大,春秋季次之,冬季最小的特征.此外,太阳辐射和水温与叶绿素a呈显著正相关关系(p<0.01),太阳辐射特别是光合有效辐射和水温的增加为藻类的大量生长和水华暴发提供了良好的物理条件,太湖蓝藻水华初始暴发时间有逐年前移的趋势且水华持续时间逐年增加.
Variations of sunlight and water temperature in the Taihu region since 1993 and their influence on chlorophyll-a in Lake Taihu were analyzed using the routine observations of the Taihu Laboratory for Lake Ecosystem Research （TLLER）, Nanjing Institute of Geography ＆ Limnology, CAS. The results of the multi-year study show that the global solar radiation, photosynthetically available radiation （ PAR）, and the ratio of global solar radiation to PAR and water temperature tend to increase in recent years. Among these, the rate of increase of PAR is higher than that of global solar radiation. The multi-year increase rate of water temperature in spring is highest, followed by autumn, while that in summer is smallest. The maximum value of＇global solar radiation and water temperature occur in summer, are approximately the same in spring and autumn, and are at a minimum in winter. There is a significant positive correlation （p 〈 0.01 ） among solar radiation, water temperature and chlorophyll-a which reveals that the increasing global solar radiation, especially PAR and water temperature, favor the growth of algae and algal blooms, resulting in the first algal bloom in Lake Taihu.
出处
《环境科学学报》
CAS
CSCD
北大核心
2009年第1期199-206,共8页
Acta Scientiae Circumstantiae
基金
国家自然科学基金项目(No.30670351)
中国科学院资源环境领域野外台站基金项目~~
关键词
太阳辐射
水温
蓝藻水华
太湖
solar radiation
water temperature
algae bloom
Lake Taihu
