edu.ucar.opensky::articles:27005 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T19:21:52.677531 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7q52tsc https://doi.org/10.5445/IR/1000093970 https Related Dataset #1 Water vapour profiles from WAVAS SAtellite component in HARmonized format (WAVAS_SAHAR) The SPARC water vapour assessment II: Biases and drifts of water vapour satellite data records with respect to frost point hygrometer records 2023-10-12T00:00:00Z publication https://n2t.org/ark:/85065/d7q52tsc https://doi.org/10.5194/amt-16-4589-2023 Kiefer, M. author Hurst, D. F. author Stiller, G. P. author Lossow, S. author Vömel, Holger author Anderson, J. author Azam, F. author Bertaux, J. author Blanot, L. author Bramstedt, K. author Burrows, J. P. author Damadeo, R. author Dinelli, B. M. author Eriksson, P. author García-Comas, M. author Gille, John author Hervig, M. author Kasai, Y. author Khosrawi, F. author Murtagh, D. author Nedoluha, G. E. author Noël, S. author Raspollini, P. author Read, W. G. author Rosenlof, K. H. author Rozanov, A. author Sioris, C. E. author Sugita, T. author von Clarmann, T. author Walker, K. A. author Weigel, K. author UCAR/NCAR - Library publisher Satellite data records of stratospheric water vapour have been compared to balloon-borne frost point hygrometer (FP) profiles that are coincident in space and time. The satellite data records of 15 different instruments cover water vapour data available from January 2000 through December 2016. The hygrometer data are from 27 stations all over the world in the same period. For the comparison, real or constructed averaging kernels have been applied to the hygrometer profiles to adjust them to the measurement characteristics of the satellite instruments. For bias evaluation, we have compared satellite profiles averaged over the available temporal coverage to the means of coincident FP profiles for individual stations. For drift determinations, we analysed time series of relative differences between spatiotemporally coincident satellite and hygrometer profiles at individual stations. In a synopsis we have also calculated the mean biases and drifts (and their respective uncertainties) for each satellite record over all applicable hygrometer stations in three altitude ranges (10-30 hPa, 30-100 hPa, and 100 hPa to tropopause). Most of the satellite data have biases <10 % and average drifts <1 % yr(-1) in at least one of the respective altitude ranges. Virtually all biases are significant in the sense that their uncertainty range in terms of twice the standard error of the mean does not include zero. Statistically significant drifts (95 % confidence) are detected for 35 % of the approximate to 1200 time series of relative differences between satellites and hygrometers. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. None eng geoscientificInformation