Terra Instruments

Image from TERRA
Thu, 16 Jan 2020 10:13 EST

In the northern Mexican state of Cohuilla lies the Cuatro Cienegas Basin.

Image from TERRA
Fri, 10 Jan 2020 14:16 EST

These views of Earth from 2019 were taken with a variety of different science instruments and data tools, all helping us see our planet more clearly.

Image from TERRA
Tue, 07 Jan 2020 11:11 EST

Kangaroo Island, off the coast of Australia, has not been immune to the devastating bushfires that have been affected the eastern coast of the continent.

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