{"references": ["SPARC, 2017. The SPARC Data Initiative: Assessment of stratospheric trace gas and aerosol climatologies from satellite limb sounders. By M. I. Hegglin and S. Tegtmeier (eds.), SPARC Report No. 8, WCRP-5/2017, doi:10.3929/ethza- 010863911.", "Hegglin, M.I., Tegtmeier, S., Anderson, J., Bourassa, A.E., Brohede, S., Degenstein, D., Froidevaux, L., Funke, B., Gille, J., Kasai, Y., Kyr\u00f6l\u00e4, E., Lumpe, J., Murtagh, D., Neu, J.L., P\u00e9rot, K., Remsberg, E., Rozanov, A., Toohey, M., Urban, U., von Clarmann, T., Walker, K.A., Wang, H.-J., Arosio, C., Damadeo, R., Fuller, R., Lingenfelser, G., McLinden C., Pendlebury, D., Roth, C., Ryan, N.J., Sioris, C., Smith, L., and Weigel, K., Overview and update of the SPARC Data Initiative: Comparison of stratospheric composition measurements from satellite limb sounders, ESSD, https://doi.org/10.5194/essd-2020-342, 2020.", "Tegtmeier, S., Hegglin, M.I., Anderson, J., Bourassa, A., Brohede, S., Degenstein, D., Froidevaux, L., Fuller, R., Funke, B., Gille, J. and Jones, A., 2013. SPARC Data Initiative: A comparison of ozone climatologies from international satellite limb sounders. Journal of Geophysical Research: Atmospheres, 118(21), pp.12-229.", "Hegglin, M.I., Tegtmeier, S., Anderson, J., Froidevaux, L., Fuller, R., Funke, B., Jones, A., Lingenfelser, G., Lumpe, J., Pendlebury, D. and Remsberg, E., 2013. SPARC Data Initiative: Comparison of water vapor climatologies from international satellite limb sounders. Journal of Geophysical Research: Atmospheres, 118(20), pp.11-824.", "Toohey, M., Hegglin, M.I., Tegtmeier, S., Anderson, J., A\u00f1el, J.A., Bourassa, A., Brohede, S., Degenstein, D., Froidevaux, L., Fuller, R. and Funke, B., 2013. Characterizing sampling biases in the trace gas climatologies of the SPARC Data Initiative. Journal of Geophysical Research: Atmospheres, 118(20), pp.11-847.", "Neu, J.L., Hegglin, M.I., Tegtmeier, S., Bourassa, A., Degenstein, D., Froidevaux, L., Fuller, R., Funke, B., Gille, J., Jones, A. and Rozanov, A., 2014. The SPARC Data Initiative: Comparison of upper troposphere/lower stratosphere ozone climatologies from limb\u2010viewing instruments and the nadir\u2010viewing Tropospheric Emission Spectrometer. Journal of Geophysical Research: Atmospheres, 119(11), pp.6971-6990.", "Tegtmeier, S., Hegglin, M. I., Anderson, J., Funke, B., Gille, J., Jones, A., Smith, L., von Clarmann, T., and Walker, K. A.: The SPARC Data Initiative: comparisons of CFC-11, CFC-12, HF and SF6 climatologies from international satellite limb sounders, Earth Syst. Sci. Data, 8, 61-78, doi:10.5194/essd-8-61-2016, 2016.", "Hegglin, M.I., Plummer, D.A., Shepherd, T.G., Scinocca, J.F., Anderson, J., Froidevaux, L., Funke, B., Hurst, D., Rozanov, A., Urban, J. and Von Clarmann, T., 2014. Vertical structure of stratospheric water vapour trends derived from merged satellite data. Nature Geoscience, 7(10), pp.768-776.", "Shepherd, T.G., Plummer, D.A., Scinocca, J.F., Hegglin, M.I., Fioletov, V.E., Reader, M.C., Remsberg, E., Von Clarmann, T. and Wang, H.J., 2014. Reconciliation of halogen-induced ozone loss with the total-column ozone record. Nature Geoscience, 7(6), pp.443-449."]}

The SPARC Data Initiative dataset is the most comprehensive compilation of vertically resolved stratospheric composition measurements to date and consists of four decades of monthly zonal mean climatologies (1978-2018) from a range of satellite limb sounders including LIMS, SAGE I/II/III, HALOE, UARS-MLS, POAMII/III, OSIRIS, SMR, MIPAS, GOMOS, SCIAMACHY, ACE-FTS, ACE-MAESTRO, Aura-MLS, HIRDLS, SMILES, OMPS-LP and SAGE III-ISS. The dataset includes most major long-lived trace gases (O3, H2O, N2O, CH4, CCl3F, and CCl2F2), transport tracers (HF, SF6, HCl, CO, HNO3, NOy), and shorter-lived trace gases important to stratospheric chemistry including nitrogens (NO, NO2, NOx, N2O5,and HNO4), halogens (BrO, ClO, ClONO2 and HOCl), and other minor species (OH, HO2, CH2O, CH3CN). The observations considered have been compiled in units of volume mixing ratio (VMR) and on a common latitude-pressure grid, covering the region from the upper troposphere to the lower mesosphere (300-0.1 hPa) with a latitudinal resolution of 5 degrees.

Dataset can be downloaded in full as zip-file (use SPARC-Data-Initiative.zip) or individually for each instrument, trace gas, and year. When used as a source, cite this dataset with its full zenodo citation including doi-number. In addition, publications using this dataset should also cite the SPARC report no. 8 (SPARC, 2017), Hegglin et al. (ESSD, 2020), and any other relevant references relevant to the specific trace gas used (see reference list below). Distribution liability: no warranty (expressed or implied) regarding these data is made, nor does the fact of distribution constitute such a warranty. No liability for any damages caused by any errors or omissions in these data are assumed. The authors cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.