| 摘要: |
| 以1961-2003年伊春林区逐日平均气温、最高气温、最低气温、降水量、平均气压、平均相对湿度、平均风速和平均辐射量为气象资料,探讨了气温、降水量、日平均辐射量等表征气候特征的指标及湿润指数(K)、植被覆盖指数(VCI)、灾害指数(DI)等表征生态环境质量的指标43年来的变化趋势,并对林区气候变化与生态环境质量变化的关系进行了分析。结果表明,伊春林区43年来平均气温呈增高趋势,年降水量、日平均辐射量均呈减少趋势。气温、降水量、日平均辐射量等气候因子的变化趋势存在季节性差异,其中冬、春两季气温升幅高于夏、秋季节;降水量在冬、春两季增多,而在夏、秋两季减少;日平均辐射量在冬季增高,而在其他三季下降。VCI在1984年前呈下降趋势,而在1984年后呈上升趋势;DI值在1961-1972年和1985-2003年较低,而在1973-1984年较高;K值总体呈小幅下降趋势,与生态环境质量综合指数(EEQ II)变化趋势相似。EEQ II值基本介于55%-70%,属于生态环境质量良好状态。对伊春林区气候条件与生态环境质量各指标进行相关性分析可知,气温、降水量、日平均辐射量等气候因子的变化趋势对生态环境质量具有显著影响,其中气温、降水量的影响较大,日平均辐射量的影响相对较小。 |
| 关键词: 气候变化 生态环境质量 伊春林区 湿润指数 植被覆盖指数 灾害指数 |
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| 基金项目:中国气象局气象新技术推广项目（CMATG2004M21） |
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| Influence of climatic change trend on ecological environment quality of Yichun forest region from 1961 to 2003 |
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| Abstract: |
| Based on daily meteorological data of average,maximum and minimum air temperature,rainfall,average air pressure,average relative humidity,average wind speed and average radiation in Yichun forest region from 1961 to 2003,the change trends of token climatic characteristic indexes and token ecological environment quality indexes were discussed from 1961 to 2003,the relations were analyzed between climatic change and ecological environment quality change in Yichun forest region.The results show that,the change trend of average air temperature increased,and the yearly rainfall and daily average radiation decreased.The change trends of climatic factors were different in different seasons.Increasing extents of air temperature in winter and spring were higher than those in summer and autumn;rainfall increased in winter and spring but decreased in summer and autumn;daily average radiation increased in winter season and decreased in other three seasons.Furthermore,VCI decreased before 1984,but increased after 1984;DI value was lower during 1961-1972 and 1985-2003,but higher during 1973-1984;K value decreased slightly as a whole,whose change trend was similar to ecological environment quality integrated index (EEQII).EEQII value was basically during 55%-70%,which showed the better state of ecological environment quality.The relativities were analyzed between climatic factors indexes and ecological environment quality indexes in Yichun forest region,and the results are that,the climatic change trends such as air temperature,rainfall,daily average radiation,etc,influenced markedly the ecological environment qualities.The influences of air temperature and rainfall were prominent,while that of daily average radiation was less. |
| Key words: climatic change,ecological environment quality,Yichun forest region,wet index,vegetation coverage index,disaster index |
