| Volumes and Issues Contents of Issue 4 |
www.atmos-meas-tech-discuss.net/3/3105/2010/
doi:10.5194/amtd-3-3105-2010
© Author(s) 2010. This work is distributed
under the Creative Commons Attribution 3.0 License.
H2O and δD profiles remotely-sensed from ground in different spectral infrared regions
1Karlsruhe Institute of Technology (KIT), IMK-ASF, Karlsruhe, Germany
2Jet Propulsion Laboratory (JPL), California Institute of Technology, Pasadena, USA
3Jet Propulsion Laboratory (JPL), California Institute of Technology, Wrightwood, USA
*now at: Agencia Estatal de Meteorología (AEMET), CIAI, Santa Cruz de Tenerife, Spain
Abstract. We present ground-based FTIR (Fourier transform infrared) water vapour analyses performed for three different spectral regions: in the mid-infrared at 790–1330 cm−1 and 2650–3180 cm−1 as well as in the near infrared at 4560–4710 cm−1. All three analyses allow the retrieval of lower, middle, and upper tropospheric water vapour amounts with a vertical resolution of about 2, 4, and 6 km, respectively. The mid-infrared analyses allow in addition the retrieval of lower and middle/upper tropospheric δD values with a vertical resolution of 3 and 7 km, respectively. The H2O profiles retrieved in all three spectral regions show a very good agreement with coincident Vaisala RS92 radiosonde measurements performed on seven different days during the Measurements of Humidity in the Atmosphere and Validation Experiment (MOHAVE) 2009 campaign. We analyse 325 ground-based FTIR spectra measured on 11 different days. For optimised line parameters we find that the 325 H2O profiles retrieved in each of the three spectral regions and the 325 δD profiles retrieved in the two mid-infrared regions agree very well. Spectroscopic parameters are the major error source for the ground-based remote sensing of δD profiles. Our inter-comparison of the two different mid-infrared spectral regions allows thus an empirical estimation of the precision of the remotely-sensed δD data of 10 and 20‰, for the lower and middle/upper troposphere, respectively.
Discussion Paper (PDF, 2233 KB) Interactive Discussion (Closed, 4 Comments) Final Revised Paper (AMT)
Notice on Discussion StatusCitation: Schneider, M., Toon, G. C., Blavier, J.-F., Hase, F., and Leblanc, T.: H2O and δD profiles remotely-sensed from ground in different spectral infrared regions, Atmos. Meas. Tech. Discuss., 3, 3105-3132, doi:10.5194/amtd-3-3105-2010, 2010. Bibtex EndNote Reference Manager XML
