BEIJING, Dec. 12, 2023 (Xinhua) – Chinese researchers have succeeded in obtaining the first global map of atmospheric ammonia (NH3) monitored by the Chinese Fengyun meteorological satellite, demonstrating its ability to detect global ammonia concentrations on a quantitative basis.
Global monitoring of ammonia is critical because it is a chemically active trace gas that plays an important role in atmospheric and climate change.
However, traditional methods for monitoring ammonia concentration make it difficult to obtain relevant data from polar regions, deserts, oceans and forests.
Researchers from the Institute of Atmospheric Physics of the Chinese Academy of Sciences created a retrieval algorithm to extract an ammonia plume from the Ultra-Broad Spectrum Infrared Atmospheric Sounder aboard the Fengyun-3D satellite and provide the first global map of an atmospheric ammonia plume observed by a probe instrument. Infrared atmosphere.
The algorithm can also retrieve interfering parameters such as ozone, carbon dioxide, water vapor and land surface temperature simultaneously when retrieving ammonia.
In the future, the researchers plan to further improve the retrieval algorithm and introduce a neural network algorithm to increase the retrieval accuracy and quality of effective monitoring data in oceans and high latitude regions.
