Terra Instruments

Image from TERRA
Mon, 27 Apr 2020 12:33 EDT

Wildfires in Siberia are bringing even more misery to an area which is already on lockdown due to the coronavirus pandemic.

Image from TERRA
Mon, 20 Apr 2020 08:15 EDT

When It Comes to Water, You Have to Think Global

Image from TERRA
Fri, 17 Apr 2020 10:04 EDT

On April 17, 2020, NASA's Terra satellite captured this image of new fires breaking out near the Chernobyl Nuclear Power Plant in Ukraine.

MOPITT

Measurement of Pollution in the Troposphere

Carbon monoxide from African fires, February 2004

Widespread fires in western Africa release carbon monoxide into the atmosphere (red) in February 2004.

Measurement of Pollution in the Troposphere (MOPITT) is an instrument designed to enhance our knowledge of the lower atmosphere and to observe how it interacts with the land and ocean biospheres. MOPITT’s specific focus is on the distribution, transport, sources, and sinks of carbon monoxide in the troposphere. Carbon monoxide, which is expelled from factories, cars, and forest fires, hinders the atmosphere’s natural ability to rid itself of harmful pollutants.

MOPITT is one of the earliest satellite sensors to use gas correlation spectroscopy. The sensor measures emitted and reflected radiance from the Earth in three spectral bands. As this light enters the sensor, it passes along two different paths through onboard containers of carbon monoxide. The different paths absorb different amounts of energy, leading to small differences in the resulting signals that correlate with the presence of these gases in the atmosphere.

MOPITT’s spatial resolution is 22 km at nadir and it ‘sees’ the Earth in swaths that are 640 km wide. Moreover, it can measure the concentrations of carbon monoxide in 5-km layers down a vertical column of atmosphere, to help scientists track the gas back to its sources.

MOPITT web site at the University of Toronto
MOPITT web site at the National Center for Atmospheric Research

MOPITT in the News