Koganei空气质量
Koganei的实时空气质量数据暂时不可用。下方的逐小时预报将在监测网络恢复上报后自动更新。
Koganei Air Pollution – Real‑time AQI
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About This Air Quality Data
Data Source
Real-time air quality measurements are provided by OpenWeatherMap's Air Pollution API, which aggregates data from multiple ground-based monitoring stations worldwide. The data is updated hourly to ensure accuracy and timeliness.
AQI Calculation Method
The Air Quality Index (AQI) is calculated using the United States Environmental Protection Agency (US EPA) standard methodology. This involves:
- Converting raw pollutant concentrations (PM2.5, PM10, NO₂, SO₂, CO) to individual AQI values
- Using EPA-defined breakpoint tables for each pollutant type
- Taking the maximum individual AQI as the overall AQI (dominant pollutant approach)
- Applying unit conversions: CO (ppm), NO₂ and SO₂ (ppb) from µg/m³
Note: AQI values are indicative and should be used for general awareness. Sensitive groups (children, elderly, those with respiratory conditions) should take extra precautions when AQI exceeds 100.
空气质量指数如何计算
| 指数 | 等级 | 含义 |
|---|---|---|
| 0–50 | 优 | 空气质量令人满意，基本无风险。所有人都可以正常进行户外活动。 |
| 51–100 | 良 | 空气质量可接受。对空气污染异常敏感的人群应减少长时间的户外剧烈活动。 |
| 101–150 | 轻度污染 | 儿童、老年人以及哮喘或心脏病患者应减少长时间或高强度的户外活动。 |
| 151–200 | 中度污染 | 所有人都可能开始出现不适。请减少长时间的户外活动；敏感人群应尽量留在室内。 |
| 201–300 | 重度污染 | 健康警报。请避免户外活动并关闭门窗。敏感人群应留在室内。 |
| 301–500 | 严重污染 | 紧急状况。所有人都应避免一切户外活动，留在室内并尽量使用空气净化器。 |
这一数值如何得出
这些数值来自OpenWeather分发的哥白尼大气模型，按Koganei的坐标取样。它们是网格上的模拟浓度，而非镇内监测站的实测数据，因此同一网格内的邻近地区会显示相近的数值。请将其视为区域性参考，而非您所在街道的实际测量值。
