上海佘山国家森林公园空气负离子动态及其主要影响因子

以上海佘山国家森林公园为研究地,通过定点观测,对比分析了林内与空地的空气负离子在日变化和季节变化上的规律。研究结果表明:在一日内的上午、中午、下午3个时段,林内与空地的空气负离子浓度和安培空气离子评价系数(CI)值均无显著性差异;而在这3个时段,林内的空气负离子浓度和CI值均显著高于空地;季节上,林内与空地的负离子浓度、CI值以及空气清洁程度均为夏秋季大于春季大于冬季,林内和空地在夏秋两季负离子浓度和CI值都显著大于空地。同时林内的空气清洁程度在4个季节皆高于空地。通过多元回归分析得出,总悬浮颗粒物(TSP)是影响夏秋两季林内负离子浓度和CI值的主要影响因素;相对湿度是影响夏秋两季空地空气负离子浓度和CI值的主要影响因素。

Aero -Anion Dynamics and Its Influence Factors in Sheshan National Forest Park,Shanghai

The diurnal and seasonal variations of aero-anions in forests and open spaces were measured in Shanghai Sheshan National Forest Park on fixed-point observations. The results showed that the aero-anion concentrations and Ampere air ion evaluation coefficient（CI） were not significantly different in the morning, at noon and in the afternoon between forests and open spaces, but these values in forests were significantly higher than in open spaces in the morning, at noon and in the afternoon. Aero anion concentrations, CI values and air cleanliness were higher in summer and autumn than in spring, and the lowest in winter. Aero anion concentrations and CI values were significantly higher in forests than in open spaces in summer and autumn. The air cleanliness was higher in forests than in open spaces in all seasons. By multivariate regression analysis, total suspended particulates （TSP） were the dominant determining factor of aero-anion concentrations and the CI values of forests in summer and autumn, and relative humidity was the dominant determining factor of open spaces in summer and autumn.