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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 18:04 |
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Conference: Bucharest University Faculty of Physics 2022 Meeting
Section: Atmosphere and Earth Science; Environment Protection
Title:
Insights into spatial distribution of NO2 pollution over Bucharest using multiple instruments (satellite, aircraft, ground-based): preliminary results of selected case-studies
Authors:
Sebastian IANCU(1,2), Alexis MERLAUD(3), Gabriela IORGA(1,6), Valeriu FILIP(1), Anca NEMUC(4), Alin SCARLAT(2), Alexandru TUDOR(2), Daniel CONSTANTIN(5), Adrian ROȘU(5), Denisa URLEA (7), Andreea CALCAN(2)
*
Affiliation:
1) Faculty of Physics, University of Bucharest, Măgurele, Romania
2) National Institute for Aerospace Research ”Elie Carafoli”, Bucharest, Romania
3) Royal Belgian Institute for Space Aeronomy, Brussels, Belgium
4) National Institute of Research and Development for Optoelectronics, Măgurele, Romania
5) ”Dunărea de Jos” University of Galați, Faculty of Sciences and Environment, Galați, Romania
6) University of Bucharest, Department of Physical Chemistry, Bd. Regina Elisabeta 4-12, 030018, Bucharest, România
7) ROMATSA, Bucharest, Romania
E-mail
iancu.stefan@incas.ro
Keywords:
NO2 urban air pollution, satellite data, airborne measurements, ground-based measurements
Abstract:
Atmospheric pollution has well-known impact on the human life; therefore observing the emissions of trace gases is an important part of monitoring the atmospheric composition. In this study, we present preliminary results obtained from measurements in Bucharest, Romania, using several platforms. The measurements are performed in the context of Sentinel 5P calibration and validation activities and the strategy is to have recurrent flights for the extent of one year, as well as ground-based measurements. The goal is to observe the variation of the city’s pollution, as the sources change from one season to another. Measurements have started in the Summer of 2021 and covered so far the time-frame until Spring 2022. The region of interest is Bucharest, capital of Romania, and its metropolitan surroundings, a region with a 112 km perimeter and an area of 850 km2. The main sources of pollution are represented by the city’s power and thermal plants and the car traffic. Apart from the scientific flights, there were performed ground-based measurements, both from a fixed location and a mobile platform. We report here results from three days of measurements: two late Autumn days, namely 11th and 22nd November 2021 and one Winter day, 23rd December 2021. Several instruments were used, airborne and ground-based (mobile and static) that employ teledetection as well as in-situ techniques. This multiple case-study research has shown that both airborne and satellite observations present large spatial variations of NO2 levels over the Bucharest region with significant differences even from day to day as the atmospheric conditions vary. The results also show good correlation between the airborne DOAS imaging system and the TROPOMI satellite observations, with correlation coefficients up to 0.96.
Acknowledgement:
The research leading to these results has received funding from:
NO Grants 2014-2021, under Project EEA-RO-NO-2019-0423, contract no 31/01.09.2020;
Project "Technical Assistance for a Romanian Atmospheric Observation System - RAMOS", contract no. 4000118115/16/NL/FF/gp, funded by the European Space Agency;
Project "Atmospheric Composition Uncertainty Field Studies - QA4EO", contract no. 4000128426/19/NL/FF/ab, funded by the European Space Agency;
AEROEXPERT 2019- 2022 programme, project code PN19010502, contract no. 8N/2019 funded by Romanian Ministry of Research and Innovation;
Project "ActiveCAART", contract no. 32PFE/2021 funded by the Romanian Ministry of Research, Innovation and Digitalization through Programme 1- Development of the national research and development system, Subprogram 1.2 Institutional performance - Funding programs of excellence in RDI.
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