Back to Search
Start Over
Using XCO2 retrievals for assessing the long-term consistency of NDACC/FTIR data sets.
- Source :
- Atmospheric Measurement Techniques; 2015, Vol. 8 Issue 3, p1555-1573, 19p
- Publication Year :
- 2015
-
Abstract
- Within the NDACC (Network for the Detection of Atmospheric Composition Change), more than 20 FTIR (Fourier-transform infrared) spectrometers, spread worldwide, provide long-term data records of many atmospheric trace gases. We present a method that uses measured and modelled XCO<subscript>2</subscript> for assessing the consistency of these NDACC data records. Our XCO<subscript>2</subscript> retrieval setup is kept simple so that it can easily be adopted for any NDACC/FTIR-like measurement made since the late 1950s. By a comparison to coincident TCCON (Total Carbon Column Observing Network) measurements, we empirically demonstrate the useful quality of this suggested NDACC XCO<subscript>2</subscript> product (empirically obtained scatter between TCCON and NDACC is about 4‰ for daily mean as well as monthly mean comparisons, and the bias is 25 ‰). Our XCO<subscript>2</subscript> model is a simple regression model fitted to CarbonTracker results and the Mauna Loa CO<subscript>2</subscript> in situ records. A comparison to TCCON data suggests an uncertainty of the model for monthly mean data of below 3 ‰.We apply the method to the NDACC/FTIR spectra that are used within the project MUSICA (multi-platform remote sensing of isotopologues for investigating the cycle of atmospheric water) and demonstrate that there is a good consistency for these globally representative set of spectra measured since 1996: the scatter between the modelled and measured XCO<subscript>2</subscript> on a yearly time scale is only 3 ‰. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 18671381
- Volume :
- 8
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- Atmospheric Measurement Techniques
- Publication Type :
- Academic Journal
- Accession number :
- 102024699
- Full Text :
- https://doi.org/10.5194/amt-8-1555-2015