CO 3daily data

This online platform uses data from the Copernicus Sentinel-5P satellite and shows the averaged carbon monoxide concentrations across the globe — using a 3-day moving average. Using a 3 day average eliminates most data gaps and improves data quality by reducing random noise. Satellite measurements of concentrations of pollutants like Carbon Monoxide, having a life-time in the atmosphere of about 1 month, can be used to monitor trans-boundary movement of air pollution. Carbon monoxide (CO) is a colorless, odorless, and tasteless gas that is toxic to humans as it can disrupt the transport of oxygen by the blood. In the atmosphere, it is spatially variable and has a life-time of about 1 month. It is produced primarily by the incomplete combustion or oxidation of carbonaceous materials or substances used for fuel in transportation by internal combustion motor vehicles, in industrial heating and processing, and in the heating of homes and buildings. Other sources of CO production are open burning and aircraft emission. The Copernicus Sentinel-5P CO measurements were first filtered according to the recommendation in the Product Readme file (only data with a qa_value > 0.50 was used). Then the measurements are mapped on a fixed latitude-longitude grid of 4096 x 8192 pixels. The grid is turned into an EPSG:4326 geotiff file using the appropriate color scale, which is again turned into an EPSG:3857 tile map.

本在线平台利用 Copernicus Sentinel-5P 卫星数据，展现了全球范围内平均一氧化碳浓度的分布情况，采用 3 天滑动平均法进行计算。采用 3 天平均法可以有效消除大部分数据缺失，并通过减少随机噪声来提升数据质量。卫星对大气中一氧化碳等污染物浓度的测量，这类污染物在大气中的寿命约为 1 个月，可用于监测跨境空气污染的迁移。一氧化碳（CO）是一种无色、无味、无臭的气体，对人体具有毒性，因为它会干扰血液运输氧气。在大气中，一氧化碳的浓度呈空间变异性，寿命约为 1 个月。其主要产生于碳基材料的不完全燃烧或氧化，以及内燃机车辆、工业加热与处理、以及住宅和建筑物的供暖过程中使用的燃料。其他一氧化碳的产生来源包括露天燃烧和飞机排放。Copernicus Sentinel-5P 卫星的一氧化碳测量数据首先根据产品说明文件中的建议进行了筛选（仅使用 qa_value > 0.50 的数据）。随后，测量数据被映射到一个固定的经纬度网格上，该网格由 4096 x 8192 像素组成。该网格通过适当的颜色尺度转换为 EPSG:4326 地理图象文件（geotiff），进而转换为 EPSG:3857 瓦片地图。