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German Satellite Achieves First Simultaneous CO2 and NO2 Measurements from Power Plant Emissions
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German Satellite Achieves First Simultaneous CO2 and NO2 Measurements from Power Plant Emissions
by Robert Schreiber
Berlin, Germany (SPX) May 12, 2025

A research team from the Max Planck Institute for Chemistry in Mainz and Heidelberg University has achieved a significant breakthrough, using the German environmental satellite EnMAP (Environmental Mapping and Analysis Program) to simultaneously detect carbon dioxide (CO2) and nitrogen dioxide (NO2) in emission plumes from power plants for the first time. This advancement, enabled by the satellite's high spatial resolution of just 30 meters, marks a new era in precision satellite-based emissions monitoring.

The newly developed approach allows scientists to directly measure CO2 and NO2 over individual power plants, providing critical data for understanding atmospheric processes and industrial emissions. The findings, published in the journal Environmental Research Letters, demonstrate that EnMAP can effectively track emissions over distances of several tens of kilometers, a feat previously considered unfeasible for a satellite not explicitly designed for atmospheric measurements.

Power plants release CO2 and nitrogen oxides (NOx) as part of their regular operations, both of which significantly contribute to air pollution and climate change. CO2, a primary greenhouse gas, and NOx, a precursor to ground-level ozone, have traditionally been challenging to monitor at high spatial resolutions from space.

Most satellite instruments lack the fine-scale detail required to distinguish individual emission sources against the background atmospheric concentrations. EnMAP, however, overcomes these challenges with its unique capability to capture detailed 30 x 30 meter resolution imagery.

"Using the EnMAP data, we were able to determine the distribution of CO2 and NO2 in emission plumes from individual power plants - for example, from facilities in Saudi Arabia and the South African Highveld region, one of the world's largest emission hotspots," said Christian Borger, the study's first author and former postdoctoral researcher in the Satellite Remote Sensing Group at the Max Planck Institute for Chemistry. Borger now conducts research at the European Centre for Medium-Range Weather Forecasts (ECMWF) in Bonn.

This approach also allows for the calculation of NOx/CO2 ratios, which provide insights into the efficiency and operating conditions of power plants. Such ratios are important for understanding the technical performance of power plants and could eventually be used to estimate CO2 emissions based solely on NO2 data, reducing the need for direct CO2 measurements in some cases.

The research demonstrates that high-resolution satellites like EnMAP can play a critical role in global emissions monitoring, complementing broader initiatives such as the European CO2M satellite program. As the need for precise, independent emissions data grows, this approach may form a cornerstone of future climate monitoring efforts.

Research Report:High-resolution observations of NO2 and CO2 emission plumes from EnMAP satellite measurements

CONTACT: [email protected] [email protected] Related Links
Max Planck Institute for Chemistry
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