This site is undergoing regular testing of non-ambient air, so the data will look “strange” on occasion as SCRIPPS scientists put the system through rigorous tests. Earth Networks will launch soon a new site at SCRIPPS that will only measure ambient air.

The Scripps site is located on the Pacific sea shore. Unlike all other Earth Networks GHG sites, this site samples air from a long pier extending into the Pacific, not from a high tower.

The provisional site status indicates that the site is not yet calibrated. The instruments are turned on and connected to the network. Engineers are in the process of calibrating the instruments. A site will go into this state during the initial setup or when undergoing maintenance.

The AWSHQ site is located in Germantown, MD at Earthnetworks.com Headquarters.

The provisional site status indicates that the site is not yet calibrated. The instruments are turned on and connected to the network. Engineers are in the process of calibrating the instruments. A site will go into this state during the initial setup or when undergoing maintenance.

The GHG01 site is located on Maryland's Eastern Shore.

The provisional site status indicates that the site is not yet calibrated. The instruments are turned on and connected to the network. Engineers are in the process of calibrating the instruments. A site will go into this state during the initial setup or when undergoing maintenance.

The Earth Networks GHG site is equipped with a high precision Picarro instrument that measures the concentration of CO₂ and Methane in the air. The gas levels are represented in Particles per Million (PPM) or Particles per Billions (PPB). Each site is also equipped with a high-end Weather station that broadcasts 27 observations to Earth Networks every 2 seconds. The data on this site is updated every minute. The live weather and GHG data is updated every 2 seconds. Use the Earth Networks drop down box to switch to another GHG site or click the info icon to learn more about the site.

This illustrates our preliminary results in identifying likely locations of carbon sources by backtracking the parcels of air containing CO₂ particles that arrive at this sensor site now. These plots are based on flow history over the last 24 hours. They show locations where CO₂ emission or absorption may have influenced the measured mixing ratio. Imagine one air parcel right above this site (white dot on the map). The Earth Networks GHG model is based on laws of atmospheric physics, uses the latest meteorological observations and accounts for many other factors to indicate where that parcel was for the last 24 hours. The darker the shaded area, the higher the likelihood is that parcel spent time in that area, and the higher the chance that its CO₂ mixing ratio was changed by carbon sources or sinks in that area. When wind direction is steady, parcels get closer to the site with time, and in this case the distance of a point in the plume from the site represents elapsed time from the present going back in history. In most cases, the combination of the plume colors and shape can help to identify where likely sources of CO₂ were during the previous day.

The graphs display live observations of CO₂ and Methane levels, outdoor temperature, wind speed and wind direction measured onsite. All graphs are synchronized. When viewing the 10 minute interval; mousing over one graph will display a time line and show tool tips of all the graphs. The tool tips contain the date and actual observation.

By default the graphs show observations from the last 24 hours. Change the time interval by selecting one of the other radio buttons. Time intervals are available for selection between 10 minutes and one week. Changing the time interval will not affect the 10 seconds update interval.

For every graph there are 300 points displayed.

For all data 8 hours and greater, we are averaging.

For the 10 minute graph, the data is updated every 2 seconds (not averaged).

For the 30 minute graph, the data is updated every 6 seconds (not averaged).

For the 8 hour graph, we are averaging the data approximately every 1.6 minutes.

For the 24 hour graph, we are averaging the data over 5 minutes.

For the 48 hour graph, we are averaging the over 10 minutes.

For the 1 week graph, we are averaging the data over 35 minutes.

The graphs display live observations of CO₂ and Methane levels, outdoor temperature, wind speed and wind direction measured onsite. All graphs are synchronized. Mousing over a graph will display a time line and show tool tips for that graph. The tool tips contain the date and actual observation.

By default the graphs show observations from the last 24 hours. Change the time interval by selecting one of the other radio buttons. Time intervals are available for selection between 8 hours and one week. Changing the time interval will not affect the 10 seconds update interval.

For every graph there are 300 points displayed.

For all data 8 hours and greater, we are averaging.

For the 8 hour graph, we are averaging the data approximately every 1.6 minutes.

For the 24 hour graph, we are averaging the data over 5 minutes.

For the 48 hour graph, we are averaging the over 10 minutes.

This map illustrates our preliminary results in identifying likely locations of carbon sources by backtracking the parcels of air containing CO₂ particles that arrive at this sensor site in the last 8, 24, or 48 hours. Move your mouse over the graphs below, or click the animate button to see the source map change over time. These plots are based on flow history over the 24 hours before the parcel reached our sensor. They show locations where CO₂ emission or absorption may have influenced the measured mixing ratio. Imagine one air parcel right above this site (white dot on the map). The Earth Networks GHG model is based on laws of atmospheric physics, uses the latest meteorological observations and accounts for many other factors to indicate where that parcel was for the last 24 hours. The darker the shaded area, the higher the likelihood is that parcel spent time in that area, and the higher the chance that its CO₂ mixing ratio was changed by carbon sources or sinks in that area. When wind direction is steady, parcels get closer to the site with time, and in this case the distance of a point in the plume from the site represents elapsed time from the present going back into history. In most cases, the combination of the plume colors and shape can help to identify regions where CO₂ sources or sinks would have influenced the mixing ratio measured at this site at a given time.