Conveners
Vertically resolved water vapour: In-situ, balloon and satellite observations
- Richard Siddans (RAL)
- Daan Hubert (BIRA-IASB)
Vertically resolved water vapour: GPS RO & surface observation
- Hao Ye (University of Reading)
- Ulrike Falk (DWD)
The JULIA (the Jülich In-Situ Airborne) data base comprises water vapor measurements from more than 50 research aircraft field campaigns spanning over a time period more than 20 years starting in 1997.
We analyzed the JULIA water vapor data set together with JETPAC Merra2 meteorological data in the frame of the SPARC OCTAVE-UTLS initiative. We show that water vapor variability in the UTLS...
The water vapour and Relative Humidity (RH) data set provided by the IAGOS research infrastructure (www.iagos.org) since 1994 covers the troposphere and extratropical tropopause regions in the Northern Hemisphere and the upper troposphere of the subtropics to tropics. Besides data provision by open access, an automated tool for data processing and quality control permits near-real-time...
STRATEOLE 2 is a French-American project based on long-duration measurements under superpressure balloon to study dynamics and processes in the TTL and the lower stratosphere. Here we present water vapor measurements by the Pico-SDLA diode laser spectrometer during the first campaign (Dec. 2019 - Feb. 2020).
In this presentation, we analyse the regional in situ tape recorder signal obtained....
This presentation describes the Stratospheric Water and Ozone Satellite Homogenized (SWOOSH) database, which includes vertically resolved ozone and water vapor data from a subset of the limb profiling satellite instruments operating since the 1980s. The primary SWOOSH product is a vertically-resolved zonal-mean monthly-mean merged timeseries. This presentation details the choice of reference...
Tropospheric water vapour isotopologue ratios (expressed as δD) give unique insight into moisture sources and cloud processes, in particular if analysed together with the water vapour concentration. In this presentation we briefly introduce the theory of {H2O,δD}-pair distributions, present the recently published MUSICA IASI {H2O,δD}-pair data set (1.5 billion individual data points, offering...
Satellite based Radio Occutations (GNSS-RO) are used to produce water vapour climate data records, with high vertical resolution. In the tropopshere the RO measurement, in combination with background model data, can be inverted to a water vapour product. The RO technique is calibration free, thus to some extend free from instability issues, but the inclusion of model background data may cause...
Many studies have by now demonstrated the accuracy of GNSS Radio Occultation (RO) data, and their usefulness as a stable climate reference. Because of this RO is now firmly established in climate reanalysis, where data are assimilated without bias correction. However, retrieval of water vapor data in the troposphere from RO refractivity requires a priori (background) information, which means...
HadISDH is a global gridded surface humidity climate monitoring product based on quality controlled and bias adjusted in situ observations from weather stations and ships. It shows that while the amount of surface water vapour has increased since the 1970s, the air has become less saturated. Similar results are found in the ERA5 reanalysis but there are temporal and spatial differences that...