ESA / ECSAT CCIWV.REP.022 Water Vapour Climate Change Initiative (WV_cci) - CCI+ Phase 2 D2.2 INDEX OF FIGURES Figure 2-1: Example of SPARC Data Initiative climatology variables. The example shown here is for MIPAS April 2008. ............................................................................................. 9 Figure 2-2: Steps involved in the merging algorithm of CDR-3. (a) The water vapour time series of the different instruments are given in colours (see legend), the CCM in grey. (b) Instrumental differences to the CCM, here CMAM is used. (c) Bias-corrected instrument offsets.
(d) Bias-corrected instrument time series and final merged dataset (black line with red diamonds) transferred back to the instrumental reference (average of Aura-MLS, ACE-FTS, and MIPAS). .................................. 11 Figure 3-1: Comparison of water vapour vertical profiles relative to thermal tropopause height from different satellite instruments and in-situ observations. The satellite observations are from the period 2010 to 2012, and the JULIA and FPH/CFH data from the period 2000 to 2016. From top to bottom: DJF, MAM, JJA and SON. From left to right: 90°S–60°S, 60°S–30°S, 30°S–30°N, 30°N–60°N, and 60°N–90°N.
The water vapour mixing ratio is calculated for each 1 km altitude bin from -6 to +6 km range, with the mid-points of the altitude grid boxes at -5.5, -4.5, -3.5,…, +5.5 km, respectively. The grey and green shadings show the mean absolute deviation (MAD) of the mean mixing ratio from JULIA (black) and FPH/CFH (green), respectively. .......................................................................................................... 15 Figure 3-2: Example for the bias-correction method with the quantile-mapping technique with the MLS measurements. ............................................................................................. 16 Figure 3-3:
Example of bias-correction on MLS observation with reference to BBH profiles. Figure shows the water vapour horizontal distribution at pressure levels from top to bottom: 70 hPa, 100 hPa, 150 hPa, 200 hPa, 250 hPa, and 300 hPa. From left to right, the data are from: original satellite mean, bias-corrected satellite mean, ERA- 5, and MERRA-2. The water vapour values are averaged from 2010 to 2014. ... 18 Figure 3-4: Same as Figure 3-3 but for bias-correction on MLS observation with reference to ACE- FTS profiles. .......................................................................................................... 19 Figure 3-5:
Merged VRWV monthly product at 250 hPa for July 2010........................................... 20 vi