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Ptashnik, I. V. (2007)
Publisher: Elsevier Ltd.
Languages: English
Types: Article
Subjects: 551
The water vapour continuum absorption is an important component of molecular absorption of radiation in atmosphere. However, uncertainty in knowledge of the value of the continuum absorption at present can achieve 100% in different spectral regions leading to an error in flux calculation up to 3-5 W/m2 global mean. This work uses line-by-line calculations to reveal the best spectral intervals for experimental verification of the CKD water vapour continuum models in the currently least studied near-infrared spectral region. Possible sources\ud of errors in continuum retrieval taken into account in the simulation include the sensitivity of laboratory spectrometers and uncertainties in the spectral line parameters in HITRAN-2004 and Schwenke-Partridge database. It is shown that a number of micro-windows in near-IR can\ud be used at present for laboratory detection of the water vapour continuum with estimated accuracy from 30 to 5%.
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    • 1. Clough SA, Kneizys FX, Davies RW. Line shape and water vapour continuum. Atmos Res 1989; 23:229-241.
    • 2. Mlawer EJ, Clough SA, Brown PD, Tobin DC. Recent developments in the water vapour continuum. Ninth ARM Science Team Meeting Proceedings, March 22-26, 1999, San Antonio, TX, p.1-6.
    • 3. Mlawer EJ, Tobin DC, Clough SA. A revised perspective on the water vapour continuum: The MT_CKD model. JQSRT, in preparation.
    • 4. Zhong W, Haigh JD, Belmiloud D, Schermaul R, Tennyson J. Note on 'The impact of new water vapour spectral line parameters on the calculation of atmospheric absorption'. QJR Meteorol Soc 2002;128:1387-1388.
    • 5. Ptashnik IV, Shine KP. Calculation of solar radiative fluxes in the atmosphere: the effect of updates in spectroscopic data. Atmos Oceanic Opt 2003;16(3):251-255.
    • 6. Fomin BA, Udalova TA, Zhitnitskii EA. Evolution of spectroscopic information over the last decade and its effect on line-by-line calculations for validation of radiation codes for climate models. JQSRT 2004;86:73-85.
    • 7. Birch DE, Alt RL. Continuum absorption in the 700-1200 cm-1 and 2400-2800 cm-1 windows. Rep. AFGL-TR-84-0128 (U.S. Air Force Geophysics Laboratory), 1984.
    • 8. Tobin DC, Strow LL, Lafferty WJ, Olson WB. Experimental investigation of the self- and N2-broadened continuum within the ν2 band of water vapour. Appl Opt 1996;35:4724- 4734.
    • 9. Han Y, Shaw JA, Churnside JH, Brown PD, Clough SA. Infrared spectral radiance measurements in the tropical Pacific atmosphere. J Geophys Res 1997;102:4353-4356.
    • 10. Tobin DC, Best FA, Brown PD, Clough SA, Dedecker RG, Ellingson RG, Garcia RK, Howell HB, Knuteson RO, Mlawer EJ, Revercomb HE, Short JF, van Delst PF, Walden VP. Down-welling spectral radiance observation at SHEBA ice station: Water vapour continuum measurements from 17-26 μm. J Geophys Res 1999;104: 2081-2092.
    • 11. Penner SS and Varanasi P. Spectral absorption coefficients in the pure rotation spectrum of water vapour. JQSRT 1967; 7: 687-690.
    • 12. Varanasi P, Chou S, Penner SS. Absorption coefficients for water vapour in the 600-1000 cm-1 region. JQSRT 1968; 8: 1537-1541.
    • 13. Ptashnik IV, Smith KM, Shine KP, Newnham DA. Laboratory measurements of water vapour continuum absorption in spectral region 5000-5600 cm-1: Evidence for water dimers. QJR Meteorol Soc 2004;130:2391-2408.
    • 14. Daniel JS, Solomon S, Kjaergaard HG, Schofield DP. Atmospheric water vapour complexes and the continuum. Geophys Res Letters 2004;31:L06118.
    • 15. Cormier JG, Hodges JT, Drummond JR. Infrared water vapour continuum absorption at atmospheric temperatures. J Chem Phys 2005;122:114309.
    • 16. Birch DE. Absorption by H2O in narrow windows between 3000-4200 cm-1. Rep. AFGLTR-85-0036 (U.S. Air Force Geophysics Laboratory), 1985.
    • 17. Fulghum SF, Tilleman MM. Interferometric calirometer for the measurement of watervapour absorption. J Opt Soc Amer 1991;8B:2401-2413.
    • 18. Tikhomirov AB, Ptashnik IV, Tikhomirov BA. Photoacoustic measurements of the water vapour continuum absorption in the 14400 cm-1 (0.694 μm) wavenumber region. Optics and Spectroscopy 2006;101(1):80-89.
    • 19. Sierk B, Solomon S, Daniel JS, Portmann RW, Gutman SI, Langford AO, Eubank CS, Dutton EG, Holub KH. Field measurements of water vapour continuum absorption in the visible and near-infrared. J Geophys Res 2004;109:D08307.
    • 20. Mitsel' AA, Ptashnik IV, Firsov KM, Fomin BA. Efficient technique for line-by-line calculating the transmittance of the absorbing atmosphere. Atmos Oceanic Opt 1995;8(10):847.
    • 21. Schwenke DW, Partridge H. Convergence testing of the analytic representation of an abinitio dipole moment function for water: Improved fitting yields improved intensities. J Chem Phys 2000;113:6592-6597.
    • 22. Rothman LS, Jacquemart D, Barbe A, D. Chris Benner, Birk M, Brown LR, Carleer MR, Chackerian C Jr., Chance K, Dana V, Devi VM, Flaud J.-M, Gamache RR, Goldman A, Hartmann J.-M, Jucks KW, Maki AG, Mandin J.-Y, Massie ST, Orphal J, Perrin A, Rinsland CP, Smith MAH, Tennyson J, Tolchenov RN, Toth RA, Vander J Auwera, Varanasi P, Wagner G. The HITRAN 2004 Molecular Spectroscopic Database. JQSRT 2005;96(2):139-204.
    • 23. Coheur P.-F, Fally S, Carleer M, Clerbaux C, Colin R, Jenouvrier A, Merienne M.-F, Hermans C, Vandaele AC. New water vapour line parameters in the 26000-13000 cm-1 region. JQSRT 2002;74:493-510.
    • 24. Ptashnik IV, Smith KM, Shine KP. Self-broadened line parameters for water vapour in the spectral region 5000-5600 cm-1. J Mol Spectrosc 2005;232(2):186-201.
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