Atmospheric Measurement Techniques www.atmos-meas-tech.net 1867-1381 1867-8548 2 2 2009 10.5194/amt-2-423-2009 http://www.atmos-meas-tech.net/2/423/2009/ http://www.atmos-meas-tech.net/2/423/2009/amt-2-423-2009.html http://www.atmos-meas-tech.net/2/423/2009/amt-2-423-2009.pdf 423 435 2009-08-05 Stratospheric isotopic water profiles from a single submillimeter limb scan by TELIS A. de Lange a.de.lange@sron.nl J. Landgraf R. Hoogeveen SRON Netherlands Institute for Space Research, Sorbonnelaan 2, Utrecht, The Netherlands Around 490 GHz relatively strong HDO and H₂¹⁸O emission lines can be found in the submillimeter thermal-emission spectrum of the Earth's atmosphere, along with lines of the principal isotopologue of water vapour. These can be used for remote sensing of the rare/principal isotope ratio in the stratosphere. A sensitivity study has been performed for retrieval simulations of water isotopologues from balloon-borne measurements by the limb sounder TELIS (TErahertz and submillimeter LImb Sounder). The study demonstrates the capability of TELIS to determine, from a single limb scan, the profiles for H₂¹⁸O and HDO between 20 km and 37 km with a retrieval error of ≈3 and a spatial resolution of 1.5 km, as determined by the width of the averaging kernel. In addition HDO can be retrieved in the range of 10–20 km, albeit with a strongly deteriorated retrieval error. Expected uncertainties in instrumental parameters have only limited impact on the retrieval results. Anderson, G., Chetwynd, J., Clough, S., Shettle, E., and Kneizys, F.: AFGL atmospheric constituent profiles (0-120km), Tech. Rep. AFGL-TR-86-0110, Air Force Geophysics Laboratory, Hanscom Air Force Base, Bedford, Mass., 1986. Brewer, A.: Evidence for a world circulation provided by the measurements of helium and water vapor distribution in the stratosphere, Q. J. Roy.\ Meteorol. Soc., 75, 351–363, 1949. Danielsen, E.: A dehydration mechanism for the stratosphere, Geophys. Res.\ Lett., 9, 605–608, 1982. Franz, P. and Röckmann, T.: High-precision isotope measurements of H2-16O, H2-17O, H2-18O, and the Delta 17O-anomaly of water vapor in the southern lowermost stratosphere, Atmos. Chem. Phys., 5, 2949–2959, 2005. Friedl-Vallon, F., Maucher, G., Seefeldner, M., Trieschmann, O., Kleinert, A., Lengel, A., Keim, C., Oelhaf, H., and Fischer, H.: Design and characterization of the balloon-borne michelson interferometer for passive atmospheric sounding (MIPAS-B2), Appl. Opt., 43, 3335–3355, 2004. Hansen, P.: Analysis of discrete ill posed problems by means of the L-curve, SIAM Rev., 34, 561–580, 1992. Holton, J. and Gettelman, A.: Horizontal transport and the dehydration of the stratosphere, Geophys. Res. Lett., 28, 2799–2802, 2001. Hoogeveen, R., Yagoubov, P., de~Lange, A., Selig, A., Koshelets, V., Ellison, B., and Birk, M.: Superconducting integrated receiver development for TELIS, Proc. SPIE, 5978, 440–450, 2005. Johnson, D., Jucks, K., Traub, W., and Chance, K.: Isotopic composition of stratospheric water vapor: Implications for transport, J. Geophys. Res., 106, 12219–12226, 2001. Koshelets, V., Ermakov, A., Filippenko, L., Lyudmila, V., Khudchenko, A., Kiselev, O., Sobolev, A., Alexander, S., Torgashin, M., Yagoubov, P., Hoogeveen, R., and Wild, W.: Superconducting integrated submillimeter receiver for TELIS, IEEE T. Appl. Supercon., 17, 336–342, \doi10.1109/TASC.2007.898622, 2007. Liebe, H.: MPM-An atmospheric millimeter-wave propagation model, Int. J.\ Infrared and Millimeter Waves, 10, 631–650, 1989. Moyer, E., Irion, F., Yung, Y., and Gunson, M.: ATMOS stratospheric deuterated water and implications for troposphere-stratosphere transport, Geophys.\ Res. Lett., 23, 2385–2388, 1996. Nassar, R., Bernath, P F., Boone, C D., Gettelman, A., McLeod, S D., and Rinsland, C P.: Variability in HDO/H₂O abundance ratios in the tropical tropopause layer, J. Geophys. Res., 112, D21305, \doi10.1029/2007JD008417, 2007. Phillips, P.: A technique for the numerical solution of certain integral equations of the first kind, J. Assoc. Comput. Mach., 9, 84–97, 1962. Read, W., Schwartz, M., Lambert, A., Su, H., Livesey, N., Daffer, W., and Boone, C.: The roles of convection, extratropical mixing, and in-situ freeze-drying in the Tropical Tropopause Layer, Atmos. Chem. Phys., 8, 6051–6067, 2008. Ridal, M., Jonsson, A., Werner, M., and Murtagh, D P.: A one-dimensional simulation of the water vapor isotope HDO in the tropical stratosphere, J.\ Geophys. Res., 106, 32283–32294, 2001. Rodgers, C D.: Inverse Methods for Atmospheric Sounding: Theory and Practice, World Scientific, River Edge, N. J., 2000. Rosenlof, K H.: How Water Enters the Stratosphere, Science, 302, 1691–1692, 2003. Rothman, L., Jacquemart, D., Barbe, A., Benner, D C., Birk, M., Brown, L., Carleer, M., Jr., C C., Chance, K., Coudert, L., Dana, V., Devi, V., Flaud, J.-M., Gamache, R., Goldman, A., Hartmann, J.-M., Jucks, K., Maki, A., Mandin, J.-Y., Massie, S., Orphal, J., Perrin, A., Rinsland, C., Smith, M., Tennyson, J., Tolchenov, R., Toth, R., Auwera, J V., Varanasi, P., and Wagner, G.: The HITRAN 2004 molecular spectroscopic database, J. Quant. Spectrosc. Radiat. Transfer, 96, 139–204, 2005. Sherwood, S. and Dessler, A.: On the control of stratospheric humidity, Geophys. Res. Lett., 27, 2513–2516, 2000. Smith, J., Ackerman, A., Jensen, E., and Toon, O.: Role of deep convection in establishing the isotopic composition of water vapor in the tropical transition layer, Geophys. Res. Lett., 33, L06812, \doi10.1029/2005GL024078, 2006. Steinwagner, J., Milz, M., von Clarmann, T., Glatthor, N., Grabowski, U., Höpfner, M., Stiller, G P., , and Röckmann, T.: HDO measurements with MIPAS, Atmos. Chem. Phys., 7, 2601–2615, 2007. Tikhonov, A.: On the solution of incorrectly stated problems and a method of regularization, Dokl. Akad. Nauk SSSR, 151, 501–504, 1963. Twomey, S.: On the numerical solution of Fredholm integral equations of the first kind by inversion of the linear system produced by quadrature, J.\ Assoc. Comput. Mach., 10, 97–101, 1963. Urban, J., Lautié, N., Murtagh, D., Eriksson, P., Kasai, Y., Loßow, S., Dupuy, E., de~La~Noë, J., Frisk, U., Olberg, M., Flochmoën, E L., and Ricaud, P.: Global observations of middle atmospheric water vapour by the Odin satellite, Planet. Space Sc., 55, 1093–1102, 2007. Vleck, J V. and Weisskopf, V.: On the Shape of Collision-Broadened Lines, Rev. Mod. Phys., 17, 227–236, 1945. Webster, C. and Heymsfield, A.: Water Isotope Ratios D/H, 18O/16O, 17O/16O in and out of Cloud Map Dehydration Pathways, Science, 302, 1742–1745, 2003. Weidner, F., Bösch, H., Bovensmann, H., Burrows, J., Butz, A., Camy-Peyret, C., Dorf, M., Gerilowski, K., Gurlit, W., Platt, U., von Friedeburg, C., Wagner, T., and Pfeilsticker, K.: Balloon-borne limb profiling of UV/vis skylight radiances, O₃, NO₂, and BrO: technical set-up and validation of the method, Atmos. Chem. Phys., 5, 1409–1422, 2005. Worden, J., Bowman, K., Noone, D., Beer, R., Clough, S., Eldering, A., Fisher, B., Goldman, A., Gunson, M., Herman, R., Kulawik, S S., Lampel, M., Luo, M., Osterman, G., Rinsland, C., Rodgers, C., Sander, S., Shephard, M., , and Worden, H.: Tropospheric Emission Spectrometer observations of the tropospheric HDO/H2O ratio: Estimation approach and characterization, J.\ Geophys. Res., 111, D16309, \doi10.1029/2005JD006606, 2006. Yagoubov, P., de~Lange, G., Golstein, H., de~Jong, L., de~Lange, A., van Kuik, B., de~Vries, E., Dercksen, J., Hoogeveen, R., Filippenko, L., Ermakov, A., and Koshelets, V.: Superconducting Integrated Receiver on Board TELIS, in: Proceedings of the 19th International Symposium on Space Terahertz Technology, SRON Netherlands Institute for Space Research, Groningen, the Netherlands, 2008. Zahn, A., Franz, P., Bechtel, C., Grooss, J.-U., and Röckmann, T.: Modelling the budget of middle atmospheric water vapour isotopes, Atmos. Chem. Phys., 6, 2073–2090, 2006. Zelinger, Z., Barret, B., Kubát, P., Ricaud, P., Attie, J.-L., Urban, E. L. F J., Murtagh, D., and St\vriž\'ik, M.: Observation of HD-18O, CH3OH and vibrationally-excited N2O from Odin/SMR measurements, Molec.\ Phys., 104, 2815–2820, 2006.