ESA / ECSAT CCIWV.REP.022 Water Vapour Climate Change Initiative (WV_cci) - CCI+ Phase 2 D2.2 RD-10. Hoor, P., C. Gurk, D. Brunner, M. I. Hegglin, H. Wernli, and H. Fischer (2004): Seasonality and extent of extratropical TST derived from in-situ CO measurements during SPURT, Atmos. Chem. Phys., 4, 1427–1442. RD-11. Hegglin, M. I., D. Brunner, Th. Peter, P. Hoor, H. Fischer, J. Staehelin, M. Krebsbach, C. Schiller, U. Parchatka, and U. Weers (2006): Measurements of NO, NOy, N2O, and O3 during SPURT: Implications for transport and chemistry in the lowermost stratosphere, Atmos. Chem. Phys., 6, 1331-1350. RD-12. Hegglin, M. I., C. D. Boone, G. L. Manney, T. G. Shepherd, K. A. Walker, P. F.
Bernath, W. H. Daffer, P. Hoor, and C. Schiller (2008): Validation of ACE-FTS satellite data in the upper troposphere/lower stratosphere (UTLS) using non- coincident measurements, Atmos. Chem. Phys., 8, 1483–1499. RD-13. Hegglin, M. I., C. D. Boone, G. L. Manney, and K. A. Walker (2009): A global view of the extratropical tropopause transition layer (ExTL) from Atmospheric Chemistry Experiment Fourier Transform Spectrometer O3, H2O, and CO, J. Geophys. Res., 114, D00B11, doi: 10.1029/2008JD009984. RD-14. Schwartz, M. J., G. L. Manney, M. I. Hegglin, N. J. Livesey, M. L. Santee, W. H.
Daffer, Climatology and variability of trace gases in extratropical double- tropopause regions from MLS, HIRDLS, and ACE-FTS measurements, J. Geophys. Res. Atmos., 120, doi:10.1002/2014JD021964, 2015. RD-15. ESA CCI Water Vapour: Product Validation and Intercomparison Report, Part 2. H. Ye, M. Hegglin, M.Schrцder, A. Niedorf. Issue 2.0, 1 June 2022. 25