COST Action ES0604: Atmospheric Water
Vapour in the Climate System (WaVaCS)
Working Group 1 Homepage

First Workshop on atmospheric water vapour measurements

21. - 23. May 2008

Deutscher Wetterdienst, Lindenberg Meteorological Observatory, Germany

In accordance with the overall aims of the WG 1 of WAVACS the first workshop was dedicated to:

Evaluation of the accuracy of existing and emerging measurement techniques

All available techniques and instruments were taken into account. These are, first of all, in situ instruments, such as radiosondes, balloon-borne air-borne hygrometers. Furthermore remote sensing instruments, such as Fourier transform infra-red spectrometers (FTIR), Raman and DIAL (differential absorption) lidar, microwave radiometers, solar and star occultation sensors, and active microwave links. A thorough characterization of the satellite instruments was of particular importance, since their global data sets are widely used in the community, and have a large impact on models.

Preparation of the cross-validation of observations

Coordinated observations campaigns using ground, balloon, aircraft, and satellite based instruments have been and will be conducted within several European projects, e.g. AIDA. Utilizing the spatial and temporal coincidence of these measurements will allow to assess the biases between the different measurement techniques. The workshop addressed such issues and particularly acted to prepare the LUAMI-2008 campaign.