****************************************************************************** dorismail 06-Jan-2019 16:23:32 Message No 1157 ****************************************************************************** Author: Pacione Rosa Subject: Atmospheric Session at EGU GA 2019 ** We apologize for multiple posting ** Dear Colleagues The next General Assembly of the European Geosciences Union will be held in Vienna, Austria, 7-12 April 2019. We would like to draw your attention to session G5.2/AS5.11 Atmospheric Sensing and Applications of Space-Geodetic Techniques: State-of-the-Art and Challenges The description of the session is given below and it can also be found at https://meetingorganizer.copernicus.org/EGU2019/session/30168 We encourage you to participate in it by submitting abstracts. Notice that the DEADLINE FOR ABSTRACT SUBMISSION IS 10 JANUARY 2019, 13:00 The session G5.2/AS5.11 will also participate in the peer-reviewed joint proceedings of the geodesy division that will be published in the EGU open-access journal Advances in Geosciences (see https://www.advances-in-geosciences.net/). Do not hesitate to contact us directly if you have any questions. We are looking forward to welcoming you in Vienna! All the best for the New Year! Rosa Pacione, Gert Mulder, Maximilian Semmling, Norman Teferle, Henrik Vedel Geodesy contributes to Atmospheric Science by providing some of the Essential Climate Variables of the Global Climate Observing System (GCOS) such as: sea level from radar altimetry, mass changes of ice and terrestrial water from satellite gravimetric missions, atmospheric water vapor from ground-based and space-based GNSS, as well as from VLBI and DORIS, atmospheric temperature from GNSS RO. Sensing of the neutral atmosphere with space geodetic techniques is an established field of research and applications, thanks to the availability of regional and global ground-based networks as well as satellite-based missions. Water vapor, the most abundant greenhouse gas of the atmosphere, is under-sampled in the current meteorological and climate observing systems, therefore obtaining and exploiting more high-quality humidity observations is essential to weather forecasting and climate monitoring. The production, exploitation and evaluation of operational GNSS-Meteorology for weather forecasting is well established in Europe due to two decades of outstanding cooperation between the geodetic community and European national meteorological services. Advancements in Numerical Weather Prediction Models (NWP) to improve forecasting of extreme precipitation, require GNSS troposphere products with a higher resolution in space and shorter delivery times than are currently in use. Homogeneously reprocessed GNSS observations on a regional and global scale have high potential for monitoring water vapor climatic trends and variability. With shortening orbit repeat periods SAR measurements are a new potential source of information to improve NWP models. At the same time, high-resolution NWP data have recently been used for deriving a new generation of mapping functions. In real-time GNSS processing these data can be employed to initialize Precise Point Positioning (PPP) processing algorithms, shortening convergence times and improving positioning. Furthermore, GNSS-reflectometry is establishing itself as an alternative method for retrieving soil moisture and has the potential to be used to retrieve near-surface water vapor. We welcome, but not limit, contributions on the subjects below: · Estimates of the state of the neutral atmosphere using ground-based and space-based geodetic data, use of those estimates in weather forecasting and climate monitoring. · Multi-GNSS and multi-instruments approaches to retrieve and inter-compare tropospheric parameters. · Real-Time and reprocessed tropospheric products for now-casting, forecasting and climate monitoring. · Assimilation of GNSS tropospheric products in NWP and in climate reanalysis models. · Production of SAR-based tropospheric parameters and use of them in NWP. · Methods for homogenization of long-term GNSS tropospheric products. · Studies of the delay properties of the GNSS signals for Earth-space propagation experiments. · Usage of NWP data in GNSS data processing. · Techniques on retrieval of soil moisture from GNSS observations and of ground-atmosphere boundary interactions. · Usage of satellite gravity observations, as obtained from GRACE and its successor GRACE-FO, for studying the atmospheric water cycle.