Development  of  methodologies  envisaged  to  obtain  vertical  profiling  of  HDO/H216O,  and  corresponding validation  and comparison with in-situ airborne and ground-based observations  during the MUSICA remote sensing  validation  campaign  were  performed  during  2014  and  2105.  The  project  MUSICA  (MUlti-platform remote  Sensing  of  Isotopologues  for  investigating  the  Cycle  of  Atmospheric  water,  supported  by  the  European  Research  Council  within  the  Seventh  Framework Programme (FP7/2007-2013/ERC Grant Agreement, nº 256961), has as main goal the generation of a highquality  database  in  a  global  scale  of  tropospheric  water  vapour  isotopologues  (H216O  y  HD16O)  from ground-based  remote  measurements  (Fourier  Transform  InfraRed  spectrometers,  FTIR) and  space -based platforms (Infrared Atmospheric Sounding Interferometer, IASI, on board the satellites EUMETSAT/MetOp -A and MetOp-B).

The Izaña Tesbed has played a very active role in MUSICA being the main station supporting different  experiments.  The  results  of  this  project  will  contribute  to  a  better  understanding  of  the  different processes affecting the cycle of atmospheric water and its link to the energy balance at a global scale.

Publications:

• Dyroff, C., Sanati, S., Christner, E., Zahn, A., Balzer, M., Bouquet, H., McManus, J. B., González-Ramos, Y., and Schneider, M.: Airborne in situ vertical profiling of HDO / H₂¹⁶O in the subtropical troposphere during the MUSICA remote sensing validation campaign, Atmos. Meas. Tech., 8, 2037–2049, https://doi.org/10.5194/amt-8-2037-2015, 2015.

• González, Y., Schneider, M., Dyroff, C., Rodríguez, S., Christner, E., García, O. E., Cuevas, E., Bustos, J. J., Ramos, R., Guirado-Fuentes, C., Barthlott, S., Wiegele, A., and Sepúlveda, E.: Detecting moisture transport pathways to the subtropical North Atlantic free troposphere using paired H₂O-δD in situ measurements, Atmos. Chem. Phys., 16, 4251–4269, https://doi.org/10.5194/acp-16-4251-2016, 2016.

• Schneider, M., González, Y., Dyroff, C., Christner, E., Wiegele, A., Barthlott, S., García, O. E., Sepúlveda, E., Hase, F., Andrey, J., Blumenstock, T., Guirado, C., Ramos, R., and Rodríguez, S.: Empirical validation and proof of added value of MUSICA’s tropospheric δD remote sensing products, Atmos. Meas. Tech., 8, 483–503, https://doi.org/10.5194/amt-8-483-2015, 2015.

• Schneider, M., Wiegele, A., Barthlott, S., González, Y., Christner, E., Dyroff, C., García, O. E., Hase, F., Blumenstock, T., Sepúlveda, E., Mengistu Tsidu, G., Takele Kenea, S., Rodríguez, S., and Andrey, J.: Accomplishments of the MUSICA project to provide accurate, long-term, global and high-resolution observations of tropospheric {H₂O,δD} pairs – a review, Atmos. Meas. Tech., 9, 2845–2875, https://doi.org/10.5194/amt-9-2845-2016, 2016.

• Scheepmaker, R. A., Frankenberg, C., Deutscher, N. M., Schneider, M., Barthlott, S., Blumenstock, T., Garcia, O. E., Hase, F., Jones, N., Mahieu, E., Notholt, J., Velazco, V., Landgraf, J., and Aben, I.: Validation of SCIAMACHY HDO/H2O measurements using the TCCON and NDACC-MUSICA networks, Atmos. Meas. Tech. Discuss., 7, 11799-11851, doi:10.5194/amtd-7-11799-2014, 2014.

• Wiegele, A., Schneider, M., Hase, F., Barthlott, S., García, O. E., Sepúlveda, E., González, Y., Blumenstock, T., Raffalski, U., Gisi, M., and Kohlhepp, R.: The MUSICA MetOp/IASI H₂O and δD products: characterisation and long-term comparison to NDACC/FTIR data, Atmos. Meas. Tech., 7, 2719–2732, https://doi.org/10.5194/amt-7-2719-2014, 2014.