Conference papers
Satellite monitoring of ammonia: from point sources to long-term trends
Abstract : IASI satellite ammonia (NH3) measurements are used to identify, categorise and quantify world's NH3 emission hotspots. In particular, applying spatial oversampling and supersampling techniques on more than 10 years of IASI measurements, we are able to track-down more than 500 localized point sources of agricultural, industrial (fertilizer, coking, soda ash, geothermal and explosives industries), urban and natural origin. We present an on-line global NH3 point sources catalogue, consisting of an interactive global map, visualizing the distribution, type and time evolution of the different point sources (http://www.ulb.ac.be/cpm/NH3-IASI.html). Calculated satellite-based emissions of NH3 suggest a drastic underestimation of point sources in bottom-up inventories, especially those of industrial emitters. Temporal analysis revealed rapid shifts in anthropogenic activities, such as the opening or closure of industrial plants. These results demonstrate that using NH3 satellite data will be hugely beneficial for improving bottom-up emission inventories.
A recently obtained homogeneous data record of NH3 total columns from IASI (ANNI-NH3-v3R) is also used to derive trends over the last decade. We apply a bootstrap resampling method to determine the trends and to assess whether the calculated values are significant or not. We obtain the first global distribution (0.5°×0.5°) of atmospheric NH3 trends based on 11 years (2008-2018) of IASI/Metop-A observations. Distinct temporal patterns are extracted and are analysed in light of anthropogenic activities and biomass burning events. National absolute and relative trends are also calculated and discussed.
https://hal-insu.archives-ouvertes.fr/insu-03018523
Contributor : Catherine Cardon <>
Submitted on : Sunday, November 22, 2020 - 8:10:52 PM
Last modification on : Tuesday, November 24, 2020 - 3:30:18 AM
Contributor : Catherine Cardon <>
Submitted on : Sunday, November 22, 2020 - 8:10:52 PM
Last modification on : Tuesday, November 24, 2020 - 3:30:18 AM
Licence
Distributed under a Creative Commons Attribution 4.0 International License