Pandora Measured Total Column NO2 Every 80 Seconds
Time series for NO2 obtained from Pandora instrument measurements every 80 seconds throughout each day (light grey circles). Approximately 90-day running average of NO2 (red line) showing that there is no significant annual cycle for these 4 sites. Amounts over 1 DU are highly polluted.
Two examples of daily variation of total column NO2 amounts at NASA Headquarters in Washington, DC. NASA HQ is located adjacent to a major highway.
Two examples of daily variation of total column NO2 amounts at the Mauna Loa Observatory Hawaii. Since the observatory is at 3.4 km, there are few local sources of NO2. The values are close to the background values typical of the stratosphere (~20 km) that are usually less than 0.1 DU.
Two examples of daily variation of total column NO2 amounts near Four Corners NM. Some of the variation in NO2 is caused by a nearby power plant.
