Water vapour
Upper tropospheric water vapour variability at high latitudes – Part 1: Influence of the annular modes
... ture (from analyses of the GEM assimilation system) is also studied (Fig. 11). This anti-correlation is not strong (R = −0.34 at 5.5 km, and monotonically less correlated with increasing height through the troposphere up ...
39
Quantification of uncertainties of water vapour column retrievals using future instruments
... high water vapour, the lowest uncertainties were found for the retrieval using the absorption channel at 905 ...low water vapour contents, the uncertainties are quite ...
12
Detection of water vapour absorption around 363 nm in measured atmospheric absorption spectra and its effect on DOAS evaluations
... weak water absorptions on the margins of ...of water vapour absorption, but probably do not pre- dict the spectral shape of the absorption peak as accurately as ...the water dipole moment for ...
25
Evolution of stratospheric ozone and water vapour time series studied with satellite measurements
... for water vapour using four instruments, SAGE II, HALOE, SMR, and ...2004–2005 water vapour concentra- tions have generally been steady, while some bins have even shown signs of increasing ...
21
Validation of water vapour profiles (version 13) retrieved by the IMK/IAA scientific retrieval processor based on full resolution spectra measured by MIPAS on board Envisat
... Satellite-borne instruments offer the opportunity to mea- sure stratospheric water vapour with global coverage. One such instrument is the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) ...
21
Validation of water vapour profiles from the Atmospheric Chemistry Experiment (ACE)
... Rayleigh and Raman channels uses a frequency doubled YAG laser, which produces 600 mJ pulses at a pulse-repetition-frequency of 20 Hz, i.e. 12 W average power, at a wavelength of 532 nm. The PCL receiver is based on a ...
61
Validation of stratospheric water vapour measurements from the airborne microwave radiometer AMSOS
... Fig. 12. Comparison of AMSOS profiles with in-situ measurements from FLASH and FISH son- des onboard aircraft Geophysica during SCOUT-O3 Darwin campaign. Plot (a) shows the mea- sured volume mixing ratio of the ...
37
Quantification of uncertainties of water vapour column retrievals using future instruments
... spheric case the information content behaves like described before (apart from 880 and 885 nm), only the magnitudes differ between the channels. If based exclusively on the findings from Fig. 8, it is hard to decide ...
33
Retrieval of global water vapour columns from GOME-2 and first applications in polar regions
... In addition to GOME and SCIAMACHY there are various other space-borne instru- ments providing global water vapour data, some of them with much longer heritage. Most notably here is the series of Special ...
22
Middle atmosphere water vapour and dynamical features in aircraft measurements and ECMWF analyses
... stratosphere (Fig. 8a, 475 K to 1000 K). However, the limited temporal and spatial coverage of the AMSOS missions does not allow more quantitative statistics on the exact positional agreement. As a qualitative example, ...
17
Middle atmosphere water vapour and dynamical features in aircraft measurements and ECMWF analyses
... to the very high horizontal resolution measurements of AMSOS. In reverse, we can use ECMWF dynamical and moisture fields to investigate the geophysical reality of the AM- SOS data at horizontal resolutions in the range ...
41
On the relative absorption strengths of water vapour in the blue wavelength range
... 2. Longpath (LP)-DOAS Measurements were analysed for water vapour using data from the intensive campaign called “HaloCaVe” at the Cape Verde Atmospheric Observatory (CVAO, Carpenter et al., 2010) during ...
42
Tropospheric water vapour and relative humidity profiles from lidar and microwave radiometry
... and water vapour, which permits the study of the same air volume, is a powerful and attractive approach to study aerosol–climate interactions, be- cause the optical properties of particles strongly depend ...
11
The isotope composition of water vapour: A powerful tool to study transport and chemistry of middle atmospheric water vapour
... A one-dimensional chemistry model is applied to study the stable hydrogen (D) and stable oxygen isotope ( 17 O, 18 O) composition of water vapour in stratosphere and mesosphere. The stable isotope ratios of ...
46
Validation of SCIAMACHY AMC-DOAS water vapour columns
... In confirmation of previous results it could be shown that SCIAMACHY derived water vapour columns are typically slightly lower than both SSM/I and ECMWF data, espe- cially over ocean areas. However, these ...
18
Variability of water vapour in the Arctic stratosphere
... January–February-mean water vapour mixing ratios above Sodankylä from the FinROSE simulation (black), ECMWF ERA-Interim reanal- ysis (green), MLS satellite measurements (blue), and frostpoint hygrometer ...
33
Water vapour profiles from SCIAMACHY solar occultation measurements derived with an onion peeling approach
... including water vapour – be- tween typically 10 and 100 ...– water vapour ...ACE water vapour profiles have been validated by comparisons with results from several space-borne, ...
13
Modelling and interpreting the isotopic composition of water vapour in convective updrafts
... of water vapour and its condensates have long been used as tracers of the global hydrological cycle, but may also be useful for understand- ing processes within individual convective ...alter water ...
33
Tomographic retrieval of water vapour and temperature around polar mesospheric clouds using Odin-SMR
... the water vapour line is dominated by Doppler (compared to pressure-) broadening at the observed altitudes, and the number density of molecules decrease exponentially with altitude, any pointing error (or ...
48
Water vapour profiles by ground-based FTIR spectroscopy: study for an optimised retrieval and its validation
... ter vapour in the UT/LS. The quick changes of atmospheric water vapour concentrations with time, their large horizontal gradients, and their decrease of several orders of magnitude with height makes ...
20