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TROPOSPHERIC EXPLORATION ABOVE MOLDAVIA PROVINCE: Trace gas measurements
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TROPOSPHERIC EXPLORATION ABOVE MOLDAVIA PROVINCE: Trace gas measurements

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The chemistry flight as0729 performed on the 16th of July 2007, between 14h20 and 16h20 local time was dedicated to pollution tracking above the Moldavia province in Romania. We wanted to explore two ...

The chemistry flight as0729 performed on the 16th of July 2007, between 14h20 and 16h20 local time was dedicated to pollution tracking above the Moldavia province in Romania. We wanted to explore two urban agglomerations: Iasi (47´09N; 27´37E) and Roman (46´55N; 26´54E) distant about 50 km from one another in straight line. Industrial zones are implanted in these areas. We went to explore the vertical distribution of the pollutants above these two areas. Moreover, a European road passes by the north of the two cities. We also went to track traffic emissions. Trace gas species measured during the flight were NOx, O3 and CO. Our goal is to establish the lower troposphere distribution of these pollutants in the area, in order to evaluate the photochemical production of ozone in an urban/industrial plume. The aim of our experimental strategy is to cover a horizontal and vertical dimension of the region.

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TROPOSPHERIC EXPLORATION ABOVE MOLDAVIA PROVINCE: Trace gas measurements TROPOSPHERIC EXPLORATION ABOVE MOLDAVIA PROVINCE: Trace gas measurements Presentation Transcript

  • TROPOSPHERIC EXPLORATION ABOVE MOLDAVIA PROVINCE: Trace gas measurements ATR-42 flight as0729 on the 16th of July 2007
    • Joelle Bechara Université Paris 12 et CNRS-Paris FR
    • Alexis Merlaud Belgian Institute for Space Aeronomy-Brussels-BL
    • Adrian Covasnianu Faculty of Geography-Geology- Univ of “Al.I.Cuza” Iasi-RO
    • Mihai Cazacu Faculty of Physics Univ of “Al.I. Cuza” – Iasi-RO
    • Victor-Daniel Carbunaru- ANM-Bucuresti-RO
    • Daniel-Eduard Constantin- University of “Dunarea de Jos”-Galati-RO
    Copyright © Eufar
  • Contents
    • What is EUFAR ?
    • Purpose of the Eufar Summer School
    • The aim of the flight
    • Flight planning and performances
    • Problems occured during the flight
    • Data obtained and their interpretation
    • Conclusions
    Copyright © Enviroscopy SRL
  • 1. What is EUFAR?
    • EUFAR ( Eu ropean F leet for A irborne R esearch) is an Infrastructure Cooperation Network of the European Commission HPRI programme under FP5/FP6. EUFAR aims at coordinating the operations of the European fleet of instrumented aircraft in the field of environmental research in the atmospheric, marine, terrestrial and Earth sciences.
    • EUFAR aims at:
      • Providing users with Transnational Access (TA) to the infrastructures,
      • Extending TA to national funding sources,
      • Promoting airborne research in the academic community,
      • Developing research activities in airborne instrumentation.
    Copyright http://www.eufar.net
  • 2. Purpose of the EUFAR Summer School
    • EUFAR summer school dealt with boundary-layer research with instrumented aircraft. Was organized by the Romanian National Meteorological Administration from 10th to 20th July 2007 in Iasi Airport, Romania.
    • The aim of the school was to train the students on airborne research.
    • The courses provided a theoretical background on boundary layer dynamics and associated physical processes, as well as training on airborne instrumentation, measurement, data analysis and interpretation. The aircraft operator (SAFIRE) informed the students about issues specific to airborne measurements, such as safety rules, flight plan design and constraints, instrument calibration and operation.
    • Each student had the opportunity to design his own experiment and perform research flights on the SAFIRE instrumented ATR-42 to collect data. The data was then processed and analyzed with the support of experienced users of airborne facilities.
    Copyright © Enviroscopy SRL
  • 3. The aim of the flight
    • pollution tracking above the Moldavia province (Nox, CO and O3)
    • explore two urban agglomerations : Iasi ( 47 ° 09´N;
    • 27 ° 37´E) and Roman ( 46 ° 55´N; 26 ° 54´E) + E 581
    • to explore the vertical distribution of the pollutants above these two areas and the European road
    • Our goal was to establish the lower troposphere distribution of these pollutants in the area, in order to evaluate the photochemical production of ozone in an urban/industrial area.
  • 4. Flight planning and performances
    • Forecast announced favorable conditions for photochemical O3 production
        • High temperatures up to 35°C  important photochemistry
        • Anticyclone conditions  stability
        • Low wind from the NW at 3 m/s
    • Flight strategy : performing a vertical exploration of three domains: 2 urban zones and 1 remote atmosphere above a forest separating the two cities
  • 4.1. Flight trajectory Iasi Roman FL180 @500’/min 2000’QNH European Road Illustration of the 3 soundings Horizontal projections of the achieved flight 3D view of the flight trajectory
  • 5. Problems occurred during the flight
    • Chemistry rack on the ATR-42 consists of:
          • An O3 monitor Thermo-Electron 49PS
          • A CO monitor Thermo-Electron 48CS
          • A NOx monitor Thermo-Electron 42C- problems
    noise NOx concentration profiles above Roman
  • 6. Data obtained and their interpretation
  • 6. Data obtained and their interpretation PBL -free troposphere interface at 2200m Potential temperature (Celsius degrees) Absolute humidity (g/m3) Potential temperature and absolute humidity profiles above Iasi during the flight
  • 6. Data obtained and their interpretation Ozone horizontal exploration at 2500 feet above IASI (concentrations in ppb ) wind direction 70 55
  • 6. Data obtained and their interpretation IASI FOREST ROMAN IASI FOREST ROMAN Ozone and CO profiles for the 3 soundings above Iasi, forest area and Roman
  • 6. Data obtained and their interpretation CO vs. O3 concentrations above Iasi CO O3
  • 7. Conclusions
    • Interesting observations concerning O 3 and CO distributions over these 2 cities, especially because photochemistry is enhanced during solar hours
    • O 3 and CO concentrations appear higher downwind the cities which is in accordance to what we expected
    • More observations, in particular at higher altitudes, let us think of O 3 intrusions due to long range transport
    • A correlation seems also to exist between the two species above the PBL
    • The lack in NOx data is a potential handicap that restrains the possibility of evaluation of photochemical pollution
  • Problems…
    • Lack of experience in the usage of airborne technique
    • Short time in the experiment
    • Too ambitious
  • Some pictures… ATR-42 at Iasi Airport
  • Some pictures… Industrial zone-Iasi
  • Some pictures… Antibiotice Iasi
  • Raul Siret- in apropiere de Roman Some pictures…
  • Roman Some pictures…
  • Mittal Steel Roman Some pictures…
  • Special thanks to: EUFAR committee Enviroscopy SRL Safire team Univ “Al. I. Cuza” Iasi Thank you for your attention!