CM SAF Week 2012

Session 1

This presentation will give a general overview on the duties of CM SAF and the data and services it provides.

Recording Christine Träger-Chatterjee

This presentation is an introduction on the software tools cdo and R that are well suited to handle CM SAF data. Both tools are freeware and can be installed under Windows and Unix environments. Scripts for cdo and R for basic operations on CM SAF products are provided and will be explained in this presentation. Time to install cdo and R and to order CM SAF data via the web user interface (WUI)

Recording Jörg Trentmann

Session 2

Karl-Göran Karlsson speaks in this presentation of the CM SAF products about the inherent problems detecting clouds in satellite imagery. He explains the used approaches and algorithms and analyses the shortcomings of the used methods in twilight and cold winter situations. Then he comes to speak about cloud top determination. This task is more difficult than cloud detection and requires sophisticated methods depending on radiative transfer calculations. The last part of the presentation is dedicated to the analysis of cloud properties on the microscale. Here, the near infra-red channels offer possibilities to discriminate between ice and water phase. The CM SAF uses here methods developed by KNMI.

Recording Karl-Göran Karlsson

The so called Global Area Coverage (GAC) climate dataset, derived from AVHRR data, provides information on cloud and radiation parameters from 1982 – 2009 covering the entire globe. This presentation gives an overview on the GAC dataset ranging from technical information, such as spatial resolution, time resolution, sensors used, climate variables covered by the dataset, accuracy of the data to some real world application examples.

Recording Karl-Göran Karlsson

Radiation parameters at the top of the atmosphere are especially important for atmospheric modelling. To derive information on radiation conditions at the top of the atmosphere satellites are the only data source. This presentation will cover the basic retrieval principals, technical information on the data as well as application examples. Time to work through the provided exercises and / or to work on your own project using CM SAF data. Support will be provided via online discussion fora.

Recording Nicolas Clerbaux

Session 3

In this first part of the presentation on short wave solar radiation fluxes, Rebekka Posselt explains the algorithms used for calculation of the products from MeteoSat first generation satellite data. Two algorithms are presented; MagicSol for the retrieval of historical radiation data and a lookup table method for the operational radiation products. In the second part of the presentation, Aku Riihelä explains the (Surface ALbedo) SAL retrieval algorithm. He also gives an introduction on the various corrections applied to the data to take into account for topography, surface characteristics and sun elevation.

Recording Rebekka Posselt and Aku Riihelä

CM SAF provides a surface radiation climate dataset derived from Meteosat satellites covering the period 1983 – 2005 and the area seen by the Meteosat satellite located at 0° longitude and 0° latitude. This presentation gives an overview on the dataset ranging from technical information, such as spatial resolution, time resolution, radiation variables covered by the dataset, accuracy of the data to some real world application examples.

Recording Rebekka Posselt

In addition to the climate datasets covering time periods of 2 decades or more, CM SAF also provides operational products. While the climate datasets need several years to be available, the operational products are available within 8 weeks. The operational products available at CM SAF are introduced together with the most important technical details and some application examples. Time to work through the provided exercises and / or to work on your own project using CM SAF data. Support will be provided via online discussion fora.

Recording Anke Kniffka

Session 4

The Hamburg Ocean Atmosphere Parameters and Fluxes from Satellite Data (HOAPS) climatology provides information on various atmospheric and oceanic parameters for the period 1987 – 2006 covering the global ice-free oceans. This presentation gives an overview on the HOAPS climate dataset ranging from technical information, such as spatial resolution, time resolution, sensors used, climate variables covered by the dataset, accuracy of the data to some real world application examples.

Recording Karsten Fennig

In addition to the HOAPS climate dataset that provides data over the ice free ocean, CM SAF also provides operational global products on water vapour and temperature for different layers of the atmosphere. Those operational products are available from 2004 until present with a maximum delay of 8 weeks between the measurement and the availability of the products. The temperature and humidity products are introduced together with the most important technical details and some application examples.Time to work through the provided exercises and / or to work on your own project using CM SAF data. Support will be provided via online discussion fora.

Recording Nathalie Courcoux

Session 5

This presentation provides an outlook on what is to be expected from the CM SAF within the next five years.

No recording available