Shipborne solar absorption measurements of CO2, CH4, N2O and CO and comparison with SCIAMACHY WFM-DOAS retrievals
Item
Title (Dublin Core)
Shipborne solar absorption measurements of CO2, CH4, N2O and CO and comparison with SCIAMACHY WFM-DOAS retrievals
Description (Dublin Core)
CO, CH<sub>4</sub>, N<sub>2</sub>O and CO<sub>2</sub> were retrieved from high resolution solar absorption spectra obtained during a ship cruise from Capetown to Bremerhaven in January/February 2003 by Fourier Transform Infrared (FTIR) spectroscopy. Precisions of better than 0.5% for the column averaged volume mixing ratios (VMR) of CH<sub>4</sub> and CO<sub>2</sub> are achieved using of O<sub>2</sub> as a reference gas. Shipborne FTIR-measurements of CO and data from SCIAMACHY/ENVISAT retrieved by the Weighting Function Modified Differential Optical Absorption Spectroscopy (WFM-DOAS) retrieval algorithm show qualitatively the same latitudinal variations. WFM-DOAS data of CH<sub>4</sub>, N<sub>2</sub>O and CO<sub>2</sub> measured over sea exhibit a great spread. The spread is significantly reduced for satellite measurements over land and a reasonable agreement can be obtained if the shipborne data are compared with the closest SCIAMACHY measurements over land. The number of comparisons is too small to draw conclusions. However, by including only WFM-DOAS data with small errors the shipborne and WFM-DOAS data compare within 5% for CH<sub>4</sub> and CO<sub>2</sub> and within 30% for N<sub>2</sub>O.
Creator (Dublin Core)
Warneke, T.
Beek, R.
Buchwitz, M.
Notholt, J.
Schulz, A.
Velazco, V.
Schrems, O.
Date (Dublin Core)
2018-06-28
Type (Dublin Core)
Text
Format (Dublin Core)
application/pdf
Identifier (Dublin Core)
10.5194/acp-5-2029-2005
https://acp.copernicus.org/articles/5/2029/2005/
Source (Dublin Core)
eISSN: 1680-7324
Language (Dublin Core)
eng
