Physical Sciences and Mathematics | Open Access Articles

Validation Of Mipas Clono2 Measurements, M Hopfner, T Von Clarmann, Nicholas B. Jones, David W. Griffith, G C. Toon, E Mahieu, R Zander, S Wood, T Blumenstock, J Hannigan, M Coffey, F Hase, H W. Fischer, J Mellqvist, A Strandberg, Thorsten Warneke, C E. Blom, C Piesch, K W. Jucks, K Chance, W Kouker, T Reddmann, C Boone, H Oelhaf, C Keim, N Glatthor, M Kiefer, S Kellmann, R Ruhnke, A Linden, G Y. Liu, B Funke, M Milz, M Schneider, G Wetzel, T Steck, A Kleinert, S Mikuteit, G P. Stiller, U Grabowski, K A. Walker, P Bernath, F Friedl-Vallon, Justus Notholt

Faculty of Science - Papers (Archive)

Altitude profiles of ClONO2 retrieved with the IMK (Institut fur Meteorologie und Klimaforschung) science-oriented data processor from MIPAS/Envisat (Michelson Interferometer for Passive Atmospheric Sounding on Envisat) mid-infrared limb emission measurements between July 2002 and March 2004 have been validated by comparison with balloon-borne (Mark IV, FIRS2, MIPASB), airborne (MIPAS-STR), ground-based (Spitsbergen, Thule, Kiruna, Harestua, Jungfraujoch, Izana, Wollongong, Lauder), and spaceborne (ACE-FTS) observations. With few exceptions we found very good agreement between these instruments and MIPAS with no evidence for any bias in most cases and altitude regions. For balloon-borne measurements typical absolute mean differences are below 0.05 ppbv over the …

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Long-Term Tropospheric Formaldehyde Concentrations Deduced From Ground-Based Fourier Transform Solar Infrared Measurements, Nicholas B. Jones, K Riedel, Barbara M. Allen, S. W. Wood, Paul Palmer, K Chance, Justus Notholt

Faculty of Science - Papers (Archive)

We report a 13-year (1992–2005) dataset of total column measurements of formaldehyde (HCHO) over Lauder, New Zealand, inferred from solar infrared spectra measured using a high-resolution Fourier Transform Spectrometer (FTS). Ambient HCHO concentrations at this rural location are often close to levels typical of remote marine environments (<250 ppt), which are close to the detection limit using standard techniques. Consequently we develop a new method that successfully produces HCHO columns with sufficient sensitivity throughout the whole season. HCHO columns over Lauder have a strong seasonal cycle (±50%), with a mean column of 4.9×1015 molecules cm−2, peaking during summer months. A simple box model of CH4 oxidation reproduces the observed broad-scale seasonal cycle, but significantly underestimates the seasonal peak HCHO ground concentrations during summer. This suggests the existence of an additional significant source of HCHO, possibly isoprene that cannot be explained by oxidation of CH4 alone. The ground-based FTS column data compare well with collocated HCHO column measurements from the Global Ozone Monitoring Experiment (GOME) satellite instrument during the operational period of GOME (1996–2001, r2=0.65, mean bias=10%, n=48).

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The Tropical Forest And Fire Emissions Experiment: Overview And Airborne Fire Emission Factor Measurements, Robert Yokelson, Thomas Karl, P Artaxo, D Blake, Theodore Christian, David W. Griffith, A Guenther, W M Hao

Faculty of Science - Papers (Archive)

The Tropical Forest and Fire Emissions Experiment (TROFFEE) used laboratory measurements followed by airborne and ground based field campaigns during the 2004 Amazon dry season to quantify the emissions from pristine tropical forest and several plantations as well as the emissions, fuel consumption, and fire ecology of tropical deforestation fires. The airborne campaign used an Embraer 110B aircraft outfitted with whole air sampling in canisters, mass-calibrated nephelometry, ozone by UV absorbance, Fourier transform infrared spectroscopy (FTIR), and proton-transfer mass spectrometry (PTR-MS) to measure PM10, O3, CO2, CO, NO, NO2, HONO, HCN, NH3, OCS, DMS, CH4, and up to 48 non-methane …

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Co Measurements From The Ace-Fts Satellite Instrument: Data Analysis And Validation Using Ground-Based, Airborne And Spaceborne Observations, C Clerbaux, M George, S Turquety, K A. Walker, Nicholas B. Jones, David W. Griffith, C P Rinsland, E Mahieu, M De Maziere, A. Kagawa, J Hannigan, M Coffey, F Hase, M Hopfner, P Duchatelet, I Kramer, A Strandberg, K Strong, Y Kasai, B Barret, P Ricaud, D Murtagh, E Dupuy, V Catoire, C Robert, C Senten, N J. Livesey, M Luo, M Lopez-Puertas, Ph Medelec, A Pazmino, H Pumphrey, T Borsdorff, P F. Coheur, J P. Cammas, James Drummond, R De Zafra, M Deeter, L Emmons, F Eddounia, J C. Gille, E Le Flochmoen, C Boone, B Funke, M Schneider, G P. Stiller, P Bernath, D P. Edwards

Faculty of Science - Papers (Archive)

The Atmospheric Chemistry Experiment (ACE) mission was launched in August 2003 to sound the atmosphere by solar occultation. Carbon monoxide (CO), a good tracer of pollution plumes and atmospheric dynamics, is one of the key species provided by the primary instrument, the ACE-Fourier Transform Spectrometer (ACE-FTS). This instrument performs measurements in both the CO 1-0 and 2-0 ro-vibrational bands, from which vertically resolved CO concentration profiles are retrieved, from the mid-troposphere to the thermosphere. This paper presents an updated description of the ACE-FTS version 2.2 CO data product, along with a comprehensive validation of these profiles using available observations (February …

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Faculty of Science - Papers (Archive)

Long-Term Tropospheric Formaldehyde Concentrations Deduced From Ground-Based Fourier Transform Solar Infrared Measurements, Nicholas B. Jones, K Riedel, Barbara M. Allen, S. W. Wood, Paul Palmer, K Chance, Justus Notholt

Faculty of Science - Papers (Archive)

The Tropical Forest And Fire Emissions Experiment: Overview And Airborne Fire Emission Factor Measurements, Robert Yokelson, Thomas Karl, P Artaxo, D Blake, Theodore Christian, David W. Griffith, A Guenther, W M Hao

Faculty of Science - Papers (Archive)

Faculty of Science - Papers (Archive)