伊犁河谷大气负氧离子时空变化与气象因子的关系

Relationship between Spatial and Temporal Variation of Atmospheric Negative Oxygen Ions and Meteorological Factors in Yili Valley

摘要: 该研究以2018~2021年度伊犁河谷地区喀拉峻、库尔德宁及其周边县大气负氧离子监测站、气象站采集的数据为基础，研究了该地区大气负氧离子在时空中的分布特点。通过选取并分析与气象要素相关的负氧离子数据，旨在阐明大气中负氧离子含量与气象条件、地表覆盖类型之间的内在联系。研究发现：城市地区森林草原地区空气负氧离子浓度显著升高；植被覆盖度是对负氧离子浓度的直接正面影响；并且，在季节变化的不同表层类型中，负氧离子的分布呈现出明显的差异。进一步分析表明，在不同的天气状况下，负氧离子浓度都与气温呈正相关，雨天相关性更好，值得注意的是，雨天相较于非雨天，负氧离子浓度的上升趋势更为突出，而在这两种情况下，相对湿度均表现出与负氧离子浓度的反向关系，这一结果与普遍认知存在较大出入。

Abstract: This study, based on the data collected by negative oxygen ion monitoring stations and meteorological stations in the Karajun, Kuerdenin and surrounding counties of the Ili Valley from 2018 to 2021, studied the distribution characteristics of negative oxygen ions in space and time in the region. By selecting and analyzing negative oxygen ion data related to meteorological elements, the study aimed to clarify the intrinsic connection between negative oxygen ion content in the atmosphere and meteorological conditions and surface cover types. The study found that the concentration of negative oxygen ions in urban and forest-grassland areas was significantly higher; Vegetation coverage had a direct positive impact on negative oxygen ion concentration; And negative oxygen ion distribution showed obvious differences in different surface types in seasonal changes. Further analysis showed that negative oxygen ion concentration was positively correlated with temperature in all weather conditions, with a better correlation in rainy days. It is worth noting that the trend of negative oxygen ion concentration was more prominent in rainy days compared to non-rainy days, while relative humidity showed an inverse relationship with negative oxygen ion concentration in both cases, which is contrary to the general perception.