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In the Pipeline

    Articles

      2023 Back to top

    1. John, V. O., L. Shi, E.-S. Chung, R. P. Allan, S. A. Buehler, and B. J. Soden (2023), Upper tropospheric humidity [in "State of the Climate in 2022"], Bull. Amer. Met. Soc., 104(9), S55–S56, doi:10.1175/2023BAMSStateoftheClimate.1.
    2. Roemer, F. E., S. A. Buehler, M. Brath, L. Kluft, and V. O. John (2023), Direct observation of Earth's spectral long-wave feedback parameter, Nature Geosci., doi:10.1038/s41561-023-01175-6.

      3. 2022 Back to top

    3. John, V. O., L. Shi, E.-S. Chung, R. P. Allan, S. A. Buehler, and B. J. Soden (2022), Upper tropospheric humidity [in "State of the Climate in 2021"], Bull. Amer. Met. Soc., 103(8), S54–S55, doi:10.1175/2022BAMSStateoftheClimate.1.

      4. 2021 Back to top

    4. John, V. O., L. Shi, E.-S. Chung, R. P. Allan, S. A. Buehler, and B. J. Soden (2021), Upper tropospheric humidity [in "State of the Climate in 2020"], Bull. Amer. Met. Soc., 102(8), S55–S56, doi:10.1175/2021BAMSStateoftheClimate.1.

      5. 2020 Back to top

    5. John, V. O., L. Shi, E.-S. Chung, R. P. Allan, S. A. Buehler, and B. J. Soden (2020), Upper tropospheric humidity [in "State of the Climate in 2019"], Bull. Amer. Met. Soc., 101(8), S45–S46, doi:10.1175/2020BAMSStateoftheClimate.1.
    6. Lang, T., S. A. Buehler, M. Burgdorf, I. Hans, and V. O. John (2020), A New Climate Data Record of Upper-Tropospheric Humidity from Microwave Observations, Sci. Data, 7(218), doi:10.1038/s41597-020-0560-1.
    7. Buehler, S. A., M. Prange, J. Mrziglod, V. O. John, M. Burgdorf, and O. Lemke (2020), Opportunistic Constant Target Matching — A New Method for Satellite Intercalibration, Earth and Space Sci., 7(5), e2019EA000856, doi:10.1029/2019EA000856.
    8. Tivig, M., V. Grützun, V. O. John, and S. A. Buehler (2020), Trends in Upper Tropospheric Humidity: Expansion of the Subtropical Dry Zones?, J. Climate, 33(6), 2149–2161, doi:10.1175/JCLI-D-19-0046.1.

      9. 2019 Back to top

    9. John, V. O., L. Shi, E.-S. Chung, R. P. Allan, S. A. Buehler, and B. J. Soden (2019), Upper tropospheric humidity [in "State of the Climate in 2018"], Bull. Amer. Met. Soc., 100(9), S28–S29, doi:10.1175/2019BAMSStateoftheClimate.1.
    10. Hans, I., M. Burgdorf, S. A. Buehler, M. Prange, T. Lang, and V. O. John (2019), An uncertainty quantified fundamental climate data record for microwave humidity sounders, Rem. Sens., 11(5), 548, doi:10.3390/rs11050548.

      11. 2018 Back to top

    11. John, V. O., L. Shi, E.-S. Chung, R. P. Allan, S. A. Buehler, and B. J. Soden (2018), Upper tropospheric humidity [in "State of the Climate in 2017"], Bull. Amer. Met. Soc., 99(8), S27–S28, doi:10.1175/2018BAMSStateoftheClimate.1.
    12. Bobryshev, O., S. A. Buehler, V. O. John, M. Brath, and H. Brogniez (2018), Is there really a closure gap between 183.31 GHz satellite passive microwave and in-situ radiosonde water vapor measurements?, IEEE T. Geosci. Remote, 56(5), 2904–2910, doi:10.1109/TGRS.2017.2786548.

      13. 2017 Back to top

    13. John, V. O., L. Shi, E.-S. Chung, R. P. Allan, S. A. Buehler, and B. J. Soden (2017), Upper tropospheric humidity [in "State of the Climate in 2016"], Bull. Amer. Met. Soc., 98(8), S25–S26, doi:10.1175/2017BAMSStateoftheClimate.1.
    14. Hans, I., M. Burgdorf, V. O. John, J. Mittaz, and S. A. Buehler (2017), Noise performance of microwave humidity sounders over their life time, Atmos. Meas. Tech., 10(12), 4927–4945, doi:10.5194/amt-10-4927-2017.

      15. 2016 Back to top

    15. Kottayil, A., V. O. John, S. A. Buehler, and K. Mohanakumar (2016), Evaluating the diurnal cycle of upper tropospheric humidity in two different climate models using satellite observations, Rem. Sens., 8(4), 325, doi:10.3390/rs8040325.
    16. Larsson, R., M. Milz, P. Rayer, R. Saunders, W. Bell, A. Booton, S. A. Buehler, P. Eriksson, and V. O. John (2016), Modeling the Zeeman effect in high-altitude SSMIS channels for numerical weather prediction profiles: comparing a fast model and a line-by-line model, Atmos. Meas. Tech., doi:10.5194/amt-9-841-2016.

      17. 2013 Back to top

    17. Moradi, I., S. A. Buehler, V. O. John, A. Reale, and R. R. Ferraro (2013), Evaluating instrumental inhomogeneities in global radiosonde upper tropospheric humidity data using microwave satellite data, IEEE Geosci. Remote Sens., 51(6), 3615–3624, doi:10.1109/TGRS.2012.2220551.
    18. John, V. O., R. P. Allan, B. Bell, S. A. Buehler, and A. Kottayil (2013), Assessment of inter-calibration methods for satellite microwave humidity sounders, J. Geophys. Res., 118, 4906–4918, doi:10.1002/jgrd.50358.
    19. John, V. O., G. Holl, N. Atkinson, and S. A. Buehler (2013), Monitoring scan asymmetry of microwave humidity sounding channels using simultaneous all angle collocations (SAACs), J. Geophys. Res., 118, 1536–1545, doi:10.1002/jgrd.50154.
    20. Kottayil, A., V. O. John, and S. A. Buehler (2013), Correcting diurnal cycle aliasing in satellite microwave humidity sounder measurements, J. Geophys. Res., 118(1), 101–113, doi:10.1029/2012JD018545.

      21. 2012 Back to top

    21. Buehler, S. A., S. Östman, C. Melsheimer, G. Holl, S. Eliasson, V. O. John, T. Blumenstock, F. Hase, G. Elgered, U. Raffalski, T. Nasuno, M. Satoh, M. Milz, and J. Mendrok (2012), A multi-instrument comparison of integrated water vapour measurements at a high latitude site, Atmos. Chem. Phys., 12(22), 10925–10943, doi:10.5194/acp-12-10925-2012.
    22. Kottayil, A., S. A. Buehler, V. O. John, L. M. Miloshevich, M. Milz, and G. Holl (2012), On the importance of Vaisala RS92 radiosonde humidity corrections for a better agreement between measured and modeled satellite radiances, J. Atmos. Oceanic Technol., 29, 248–259, doi:10.1175/JTECH-D-11-00080.1.
    23. John, V. O., G. Holl, S. A. Buehler, B. Candy, R. W. Saunders, and D. E. Parker (2012), Understanding inter-satellite biases of microwave humidity sounders using global simultaneous nadir overpasses, J. Geophys. Res., 117(D2), D02305, doi:10.1029/2011JD016349.

      24. 2011 Back to top

    24. John, V. O., G. Holl, R. P. Allan, S. A. Buehler, D. E. Parker, and B. J. Soden (2011), Clear-sky biases in satellite infra-red estimates of upper tropospheric humidity and its trends, J. Geophys. Res., 116, D14108, doi:10.1029/2010JD015355.
    25. Eliasson, S., S. A. Buehler, M. Milz, P. Eriksson, and V. O. John (2011), Assessing observed and modelled spatial distributions of ice water path using satellite data, Atmos. Chem. Phys., 11, 375–391, doi:10.5194/acp-11-375-2011.

      26. 2010 Back to top

    26. Moradi, I., S. A. Buehler, V. O. John, and S. Eliasson (2010), Comparing upper tropospheric humidity data from microwave satellite instruments and tropical radiosondes, J. Geophys. Res., 115, D24310, doi:10.1029/2010JD013962.
    27. Xavier, Prince K., V. O. John, S. A. Buehler, R. S. Ajayamohan, and S. Sijikumar (2010), Variability of Indian summer monsoon in a new upper tropospheric humidity data set, Geophys. Res. Lett., 37, L05705, doi:10.1029/2009GL041861.
    28. Buehler, S. A., V. O. John, A. Kottayil, M. Milz, and P. Eriksson (2010), Efficient Radiative Transfer Simulations for a Broadband Infrared Radiometer — Combining a Weighted Mean of Representative Frequencies Approach with Frequency Selection by Simulated Annealing, J. Quant. Spectrosc. Radiat. Transfer, 111(4), 602–615, doi:10.1016/j.jqsrt.2009.10.018.

      29. 2009 Back to top

    29. Milz, M., S. A. Buehler, and V. O. John (2009), Comparison of AIRS and AMSU-B monthly mean estimates of upper tropopsheric humidity, Geophys. Res. Lett., L10804, doi:10.1029/2008GL037068.

      30. 2008 Back to top

    30. Buehler, S. A., M. Kuvatov, V. O. John, M. Milz, B. J. Soden, D. L. Jackson, and J. Notholt (2008), An Upper Tropospheric Humidity Data Set From Operational Satellite Microwave Data, J. Geophys. Res., 113, D14110, doi:10.1029/2007JD009314.
    31. Sreerekha, T. R., S. A. Buehler, U. O'Keeffe, A. Doherty, C. Emde, and V. O. John (2008), A strong ice cloud event as seen by a microwave satellite sensor: Simulations and Observations, J. Quant. Spectrosc. Radiat. Transfer, 109(9), 1705–1718, doi:10.1016/j.jqsrt.2007.12.023.

      32. 2007 Back to top

    32. Buehler, S. A., C. Jiménez, K. F. Evans, P. Eriksson, B. Rydberg, A. J. Heymsfield, C. Stubenrauch, U. Lohmann, C. Emde, V. O. John, T. R. Sreerekha, and C. P. Davis (2007), A concept for a satellite mission to measure cloud ice water path and ice particle size, Q. J. R. Meteorol. Soc., 133(S2), 109–128, doi:10.1002/qj.143.
    33. Buehler, S. A., M. Kuvatov, T. R. Sreerekha, V. O. John, B. Rydberg, P. Eriksson, and J. Notholt (2007), A cloud filtering method for microwave upper tropospheric humidity measurements, Atmos. Chem. Phys., 7(21), 5531–5542, doi:10.5194/acp-7-5531-2007.
    34. Pietranera, L., S. A. Buehler, P. G. Calisse, C. Emde, D. Hayton, V. O. John, B. Maffei, L. Piccirillo, G. Pisano, G. Savini, and T. R. Sreerekha (2007), Observing CMB polarisation through ice, Mon. Not. R. Astron. Soc., 376, 645–650, doi:10.1111/j.1365-2966.2007.11464.x.

      35. 2006 Back to top

    35. John, V. O., S. A. Buehler, A. von Engeln, P. Eriksson, T. Kuhn, E. Brocard, and G. Koenig-Langlo (2006), Understanding the variability of clear-sky outgoing long-wave radiation based on ship-based temperature and water vapor measurements, Q. J. R. Meteorol. Soc., 132(621), 2675–2691, doi:10.1256/qj.05.70.
    36. Buehler, S. A., N. Courcoux, and V. O. John (2006), Radiative transfer calculations for a passive microwave satellite sensor: Comparing a fast model and a line-by-line model, J. Geophys. Res., 111, D20304, doi:10.1029/2005JD006552.
    37. John, V. O., S. A. Buehler, and N. Courcoux (2006), A cautionary note on the use of Gaussian statistics in satellite based UTH climatologies, IEEE Geosci. Remote Sens. Let., 3(1), 130–134, doi:10.1109/LGRS.2005.859350.
    38. Buehler, S. A., A. von Engeln, E. Brocard, V. O. John, T. Kuhn, and P. Eriksson (2006), Recent developments in the line-by-line modeling of outgoing longwave radiation, J. Quant. Spectrosc. Radiat. Transfer, 98(3), 446–457, doi:10.1016/j.jqsrt.2005.11.001.

      39. 2005 Back to top

    39. Buehler, S. A., M. Kuvatov, and V. O. John (2005), Scan asymmetries in AMSU-B data, Geophys. Res. Lett., 32, L24810, doi:10.1029/2005GL024747.
    40. Houshangpour, A., V. O. John, and S. A. Buehler (2005), Retrieval of upper tropospheric water vapor and upper tropospheric humidity from AMSU radiances, Atmos. Chem. Phys., 5, 2019–2028, SRef-ID:1680-7324/acp/2005-5-2019, doi:10.5194/acp-5-2019-2005.
    41. John, V. O. and S. A. Buehler (2005), Comparison of microwave satellite humidity data and radiosonde profiles: A Survey of European stations, Atmos. Chem. Phys., 5, 1843–1853, SRef-ID:1680-7324/acp/2005-5-1843, doi:10.5194/acp-5-1843-2005.
    42. Melsheimer, C., C. Verdes, S. A. Buehler, C. Emde, P. Eriksson, D. G. Feist, S. Ichizawa, V. O. John, Y. Kasai, G. Kopp, N. Koulev, T. Kuhn, O. Lemke, S. Ochiai, F. Schreier, T. R. Sreerekha, M. Suzuki, C. Takahashi, S. Tsujimaru, and J. Urban (2005), Intercomparison of General Purpose Clear Sky Atmospheric Radiative Transfer Models for the Millimeter/Submillimeter Spectral Range, Radio Sci., 40, RS1007, doi:10.1029/2004RS003110.
    43. Jiménez, C., P. Eriksson, V. O. John, and S. A. Buehler (2005), A practical demonstration on AMSU retrieval precision for upper tropospheric humidity by a non-linear multi-channel regression method, Atmos. Chem. Phys., 5, 451–459, doi:10.5194/acp-5-451-2005.
    44. Buehler, S. A. and V. O. John (2005), A Simple Method to Relate Microwave Radiances to Upper Tropospheric Humidity, J. Geophys. Res., 110, D02110, doi:10.1029/2004JD005111.

      45. 2004 Back to top

    45. John, V. O. and S. A. Buehler (2004), The impact of ozone lines on AMSU-B radiances, Geophys. Res. Lett., 31, L21108, doi:10.1029/2004GL021214.
    46. Buehler, S. A., M. Kuvatov, V. O. John, U. Leiterer, and H. Dier (2004), Comparison of Microwave Satellite Humidity Data and Radiosonde Profiles: A Case Study, J. Geophys. Res., 109, D13103, doi:10.1029/2004JD004605.

    Books and Book Contributions

      Theses

        2005 Back to top

      1. John, V. O. (2005), Analysis of upper tropospheric humidity measurements by microwave sounders and radiosondes, Berichte aus dem Institut fuer UmweltphysikLogos Verlag Berlin, Ph. D. Thesis, University of Bremen, ISBN 3-8325-1010-9.

        2. 2000 Back to top

      2. John, V. O. (2000), Impact of pollution on precipitation at an urban station - Pune, Master's thesis, Cochin University of Science and Technology, M. Tech., Atmospheric Sciences.

      Technical Reports and Proposals

        2013 Back to top

      1. John, V. O., D. E. Parker, S. A. Buehler, J. Price, and R. W. Saunders (2013), Analysis of upper-tropospheric humidity in tropical descent regions using observed and modelled radiances, Atmos. Chem. Phys. Discuss., 13, 10547–10560, doi:10.5194/acpd-13-10547-2013.

        2. 2004 Back to top

      2. von Engeln, Axel, E. Brocard, S. A. Buehler, P. Eriksson, V. Oommen John, and T. Kuhn (2004), ACE+ Climate Impact Study: Radiation Part, Final Report, ESTEC Contract No 17479/03/NL/FF.
      3. von Engeln, Axel, E. Brocard, S. A. Buehler, P. Eriksson, V. Oommen John, and T. Kuhn (2004), ACE+ Climate Impact Study: Radiation Part, Executive Summary, ESTEC Contract No 17479/03/NL/FF.

      Articles in Conference Proceedings and Newsletters

        2010 Back to top

      1. Moradi, I, S. A. Buehler, and V. O. John (2010), Comparing upper tropospheric humidity from microwave satellite instruments and IGRA radiosonde data, In: Microwave Radiometry and Remote Sensing of the Environment (MicroRad), 2010 11th Specialist Meeting on, pp. 146–151, IEEE, doi:10.1109/MICRORAD.2010.5559573.

        2. 2009 Back to top

      2. Allan, R. P. and V. O. John (2009), Monitoring changes in precipitation and radiative energy using satellite data and climate models, In: proceedings of the 2009 EUMETSAT METEOROLOGICAL SATELLITE CONFERENCE, P.55, S6, 25, ISSN 1011-3932.

        3. 2006 Back to top

      3. John, V. O., S. A. Buehler, M. Kuvatov, B. J. Soden, and T. R. Sreerekha (2006), Toward a long-term homogenized UTH data set derived from satellite microwave measurements, In: Proceedings of SPIE Conference on Microwave Remote Sensing of the Atmosphere and Environment V, November 13-17, 2006, Goa, India, doi:10.1117/12.694305.

        4. 2005 Back to top

      4. John, V. O. and S. A. Buehler (2005), Analysis of upper tropospheric humidity measurements by microwave sounders and radiosondes, In: Proceedings of the UTLS OZONE / CWVC Workshop on 'Water Vapour in the UTLS'.

        5. 2004 Back to top

      5. John, V. O. and S. A. Buehler (2004), Scaling of microwave radiances to layer averaged relative humidity, In: IASTA Bulletin, International conference on: aerosols, clouds, and climate., pp. 293–296, ISSN 0971-4510.

        6. 2003 Back to top

      6. John, V. O., S. A. Buehler, and M. Kuvatov (2003), Comparison of AMSU-B Brightness Temperature with Simulated Brightness Temperature using Global Radiosonde Data, In: Thirteenth International TOVS Study Conference (ITSC - XIII), St. Adele, Montreal, Canada.

        7. 2002 Back to top

      7. John, V. O., M. Kuvatov, and S. A. Buehler (2002), ARTS - A New Radiative Transfer Model for AMSU, In: Twelfth International TOVS Study Conference (ITSC - XII), Lorne, Australia.

      Internal Reports