Projekt

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Saisonale und räumliche Charakteriseriung von CO2 Quellregionen basierend auf kontinuierlichen Messungen stabiler CO2 Isotopen mittels Laserspektroskopie am Jungfraujoch

Titel Englisch Seasonal and spatial characterization of CO2 source regions based on continuous QC-laser spectroscopy measurements of stable isotopes at Jungfraujoch
Gesuchsteller/in Emmenegger Lukas
Nummer 126816
Förderungsinstrument Projektförderung (Abt. I-III)
Forschungseinrichtung Luftfremdstoffe / Umwelttechnik EMPA
Hochschule Eidg. Materialprüfungs- und Forschungsanstalt - EMPA
Hauptdisziplin Klimatologie, Atmosphärenphysik, Aeronomie
Beginn/Ende 01.05.2011 - 31.10.2012
Bewilligter Betrag 168'000.00
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Keywords (4)

stable CO2 isotopes; laser spectroscopy; Lagrange transport model; regional characterization

Lay Summary (Englisch)

Lead
Lay summary

The increase of carbon dioxide concentration in the earth's atmosphere is the dominating driver for global warming and climate change. Its ecological and economical impacts are widely recognized, and the quantification of the sources and sinks of 2CO is thus of great scientific, political and economical interest. CO2 concentration measurements alone are not sufficient to gain information about the gross exchange fluxes between the different carbon pools (ocean, biosphere and atmosphere) because they resemble net exchanges. However, individual fluxes are marked with specific isotopic 2CO signatures, which make the study of the stable CO2 isotope ratios (d13C-2CO and d18O-2CO) highly attractive.

cycle and the corresponding models it would, however, be highly valuable to complement this information with 2 sources has mainly been performed on solid or liquid substrates, or in the gas phase close to the source. With respect to the global CO2To date, isotopic characterization of COseasonal and regional signatures of 2CO sources. Such large-scale, integrated information can be obtained from continuous, high-precision measurements performed at the high Altitude Research station Jungfraujoch, combined with state of the art Lagrangian transport simulations. One key element of this project is the long-term monitoring of d13C-2CO and d18O-2CO at a time scale of minutes, using a quantum cascade laser absorption spectrometer. This instrument has successfully been employed in several field campaigns, reaching a precision better than 0.05 ‰ in nearly unattended operation.

Direktlink auf Lay Summary Letzte Aktualisierung: 21.02.2013

Verantw. Gesuchsteller/in und weitere Gesuchstellende

Mitarbeitende

Publikationen

Publikation
Tracking isotopic signatures of CO2 at the high altitude site Jungfraujoch with laser spectroscopy: Analytical improvements and representative results
Sturm P. (2013), Tracking isotopic signatures of CO2 at the high altitude site Jungfraujoch with laser spectroscopy: Analytical improvements and representative results, in Atmospheric Measurement Techniques, 1659-1671.
Continuous isotopic composition measurements of tropospheric CO2 at Jungfraujoch (3580 m a.s.l.), Switzerland: real-time observation of regional pollution events
Tuzson B. (2011), Continuous isotopic composition measurements of tropospheric CO2 at Jungfraujoch (3580 m a.s.l.), Switzerland: real-time observation of regional pollution events, in Atmospheric Chemistry and Physics, 24563-2459.

Zusammenarbeit

Gruppe / Person Land
Formen der Zusammenarbeit
Dr. Pirmin Kaufmann and Dr. Philippe Steiner, Meteoschweiz, Zürich. Schweiz (Europa)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
M. Zahniser PhD / Center for Atmospheric and Environmental Chemistry / Aerodyne Research Vereinigte Staaten von Amerika (Nordamerika)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
- Forschungsinfrastrukturen
- Austausch von Mitarbeitern
- Industrie/Wirtschaft/weitere anwendungs-orientierte Zusammenarbeit
Alpes Lasers Schweiz (Europa)
- Industrie/Wirtschaft/weitere anwendungs-orientierte Zusammenarbeit
Univ. Berne Schweiz (Europa)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
ETHZ Institute of Agricultural Sciences Schweiz (Europa)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
- Forschungsinfrastrukturen
ETHZ Quantum Optoelectronics Deutschland (Europa)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten

Wissenschaftliche Veranstaltungen

Aktiver Beitrag

Titel Art des Beitrags Titel des Artikels oder Beitrages Datum Ort Beteiligte Personen
WMO Global Atmosphere Watch (WMO/GAW) Fall Meeting Vortrag im Rahmen einer Tagung Frontier of QCLAS for stable CO2 isotopes 09.11.2012 Zürich, Schweiz Emmenegger Lukas;
Swiss Chemical Society Fall Meeting 2012 Vortrag im Rahmen einer Tagung Stable Isotopes at Jungfraujoch 13.09.2012 Zürich, Schweiz Emmenegger Lukas;
JESIUM2012 Vortrag im Rahmen einer Tagung Continuous isotopic composition measurements of tropospheric CO2 at Jungfraujoch 03.09.2012 Leipzig, Deutschland Emmenegger Lukas; Sturm Patrick;
Laser Optics Conference Vortrag im Rahmen einer Tagung QCLAS for stable isotopes of CO2 25.06.2012 St. Petersburg, Russland Emmenegger Lukas; Sturm Patrick;
GEO-Carbon Vortrag im Rahmen einer Tagung Continuous isotopic composition measurements of tropospheric CO2 at Jungfraujoch 24.10.2011 Rome, Italien Emmenegger Lukas; Sturm Patrick;


Veranstaltungen zum Wissenstransfer



Selber organisiert

Titel Datum Ort
Fachtagung Feinstaub: Inhaltsstoffe und Quellenzuordnung 19.01.2012 Dübendorf, Schweiz

Auszeichnungen

Titel Jahr
Best Poster Award 2012

Verbundene Projekte

Nummer Titel Start Förderungsinstrument
136273 CarboCount CH: Quantifying greenhouse gas fluxes and their sensitivity to climate variations: A case study in Central Europe and Switzerland 01.01.2012 Sinergia
125336 Kontinuierliche Bestimmung von N2O Isotopomeren in Umgebungsluft mittels Quantenkaskadenlaser-Absorptionspektrometrie 01.11.2009 Projektförderung (Abt. I-III)

Abstract

The increase of carbon dioxide concentration in the earth's atmosphere is the dominating driver for global warming and climate change. Its ecological and economical impacts are widely recognized, and the quantification of the sources and sinks of CO2 is thus of great scientific, political and economical interest. CO2 concentration measurements alone are not sufficient to gain information about the gross exchange fluxes between the different carbon pools (ocean, biosphere and atmosphere) because they resemble net exchanges. However, individual fluxes are marked with specific isotopic CO2 signatures, which make the study of the stable CO2 isotope ratios (d13C-CO2 and d18O-CO2) highly attractive.Isotope discrimination in d13C-CO2 is mainly driven by photosynthesis, and only to a minor extend by senescence, bacterial decomposition and respiration. Additional fractionation occurs through the transformation of organic material to fossil fuels. In contrast, d18O-CO2 in natural processes is largely governed by the isotope exchange between CO2 and water. Exchange fluxes of atmospheric CO2 with ocean water are high and drive d18O-CO2 towards zero on the VPDB-CO2 scale. However, oxygen exchange with leaf water (enriched in 18O) during photosynthesis and with ground water (depleted in 18O) during respiration modify the d18O-CO2 signature of the related CO2 sources.To date, isotopic characterization of CO2 sources has mainly been performed on solid or liquid substrates, or in the gas phase close to the source. With respect to the global CO2 cycle and the corresponding models it would, however, be highly valuable to complement this information with seasonal and regional signatures of CO2 sources. Such large-scale, integrated information can be obtained from continuous, high-precision measurements performed at the high Altitude Research station Jungfraujoch (46.548°N, 7.987°E, 3580 m a.s.l.) combined with state of the art Lagrangian transport simulations. One key element of this project is the long-term monitoring of d13C-CO2 and d18O-CO2 at a time scale of minutes, using a quantum cascade laser absorption spectrometer. This instrument has successfully been employed in several field campaigns, reaching a precision better than 0.05 ‰ in nearly unattended operation, without the need for liquid nitrogen.Competence in three strongly linked fields is combined within this project to reach its ambitious goals: isotope related climate research (Univ. Bern / M. Leuenberger), laser spectroscopy for isotope specific gas analysis (Empa / L. Emmenegger), and trajectory statistics and Lagrangian Particle Dispersion Models for source characterization (Empa / D. Brunner).
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