no2 concentrations amid lockdown

Measured by sentinel-5

Nitrogen dioxide (NO2) and nitrogen oxide (NO) together are usually referred to as nitrogen oxides (NOx = NO + NO2). They are important trace gases in the Earth’s atmosphere, present in both the troposphere and the stratosphere. They enter the atmosphere as a result of anthropogenic activities (notably fossil fuel combustion and biomass burning) and natural processes (such as microbiological processes in soils, wildfires and lightning).

// get the data
var y2019 = ee.ImageCollection("COPERNICUS/S5P/OFFL/L3_NO2").filterDate("2019-02-01","2019-02-28");
var y2020 = ee.ImageCollection("COPERNICUS/S5P/OFFL/L3_NO2").filterDate("2020-02-01","2020-02-28");

// get the layer with all countries
var countries = ee.FeatureCollection("USDOS/LSIB_SIMPLE/2017").filter(ee.Filter.eq("country_co", "CH"))

// add layers to map
Map.addLayer(y2019.max().select("NO2_column_number_density").clip(countries),{min:0.00002,max:0.0005,palette:"lightblue,orange,yellow,red,purple"},"Feb 2019");
Map.addLayer(y2020.max().select("NO2_column_number_density").clip(countries),{min:0.00002,max:0.0005,palette:"lightblue,orange,yellow,red,purple"},"Feb 2020");


One comment

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s