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This book presents edited and peer-reviewed papers from the 3rd International Workshop on Occultations for Probing Atmosphere and Climate (OPAC-3), held in Austria. It provides a key reference on the current status in the field and looks toward new horizons.
Use of occultation methodology for observing the Earth's atmosphere and climate has become so broad as to comprise solar, lunar, stellar, navigation and satellite crosslink occultation methods. The atmospheric parameters obtained extend from the fundamental variables temperature, density, pressure, water vapor, and ozone via a multitude of trace gas species to particulate species such as aerosols and cloud liquid water. Ionospheric electron density is sensed as well. The methods all share the key properties of self-calibration, high accuracy and vertical resolution, global coverage, and (if using radio signals) all-weather capability. Occultation data are thus of high value in a wide range o...
This book presents carefully edited and peer-reviewed papers from the 2nd International Workshop on Occultations for Probing Atmosphere and Climate (OPAC-2), held in Graz, Austria. It starts with a general introductory paper and proceeds to address the full range from methodology in general via specific occultation methods (GNSS-LEO, LEO-LEO, stellar and solar) to the use of occultation data, with focus on atmospheric physics, meteorology and climate.
For the SEAC conference in Graz (2018) and for the Proceedings the motto "Harmony and symmetry - celestial regularities shaping human culture" was chosen. There were at least two strong reasons for this motto: First, the connection between astronomy and human culture has an extremely long tradition, and one of its absolute high points is the astronomer Johannes Kepler, who spent his entire life searching for the relationship between the movement of heavenly lights and ideas about harmonious structures and regular bodies. Kepler started his scientific career and authored his first book, the Mysterium cosmographicum, in Graz. Kepler argued in his first publication for the twelve-fold partition...
In 1995, the German Space Agency DARA selected the CHAllenging Minisatellite Payload (CHAMP) mission for development under a special support programme for the space industry in the new states of the unified Germany, with the Principal Investigator and his home institution GFZ Potsdam being ultimately responsible for the success of all mission phases. After three years of spacecraft manufactur ing and testing, the satellite was injected successfully into its final, near circular, almost polar and low altitude (450 km) orbit from the cosmodrome Plesetsk in Russia on July 15, 2000. After a nine month commissioning period during which all spacecraft systems and instruments were checked, calibrat...
In the summer of 2000 the German geo-research satellite CHAMP was launched into orbit. Its innovative payload arrangement and the low initial orbit allow CHAMP to simultaneously collect and almost continuously analyse precise data relating to gravity and magnetic fields at low altitude. In addition, CHAMP also measures the neutral atmosphere and ionosphere using GPS techniques. Three years after launch, more than 200 CHAMP investigators and co-investigators from all over the world met at the GeoForschungsZentrum in Potsdam to present and discuss the results derived from the extensive data sets of the mission. The main outcome of this expert meeting is summarized in this volume. The book offers a comprehensive insight into the present status of the exploitation of CHAMP data for Earth system research and practical applications in geodesy, geophysics and meteorology.
The book is devoted to radio occultation (RO) remote sensing of the earth’s atmosphere and ionosphere as a global method of monitoring. This technique used the radio links satellite-to-satellite when a satellite-receiver setting or rising behind the earth’s atmosphere is relative to a satellite - emitter of radio waves. During setting the radio ray perigee moves through the ionosphere and ionosphere. Atmospheric and ionospheric effects arise in most cases owing to influence of a zone near the radio ray perigee and cause significant variations of the amplitude, phase, and frequency of the radio waves. These variations enable determination of the altitude profiles of temperature, pressure, refractivity, density, humidity and turbulence in the atmosphere, distribution of the electron density in the ionosphere, and the wave phenomena at different altitudes with a global coverage. The aim of this book consists of the systematic description of the different approaches, results of investigation and perspectives of the RO remote sensing as a tool for investigations of the atmosphere and ionosphere.
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Dürresommer 2003, Hochwasser 2002, Lawinenwinter 1999/2000, Wintersturm Lothar 1999: Vier zentral-europäische Naturkatastrophen der letzten Jahre. Mit welchen extremen Wetterereignissen müssen wir in Zukunft rechnen? Welche wirtschaftlichen Folgen sind damit verbunden? Wie können sich besonders gefährdete Wirtschaftsbranchen vor zu großer Schadenswirkung schützen? Welche Aufgaben muss dabei die Politik übernehmen? Dies sind die zentralen Kernfragen des vorliegenden Buches, in dem erstmals KlimaforscherInnen gemeinsam mit VertreterInnen der Wirtschaftsbranchen dieses aktuelle Problemfeld behandeln. Auf den bisherigen Erfahrungen mit Betroffenheit, Anpassung und Katastrophenmanagement aufbauend wurden Handlungsempfehlungen aus Wirtschaft, Wissenschaft und Politik an gesellschaftliche Mechanismen erstellt, die allgemeine politische, fiskalische und ordnungspolitische Maßnahmen, aber auch Maßnahmen zur Sicherung der Versorgung im Katastrophenfall umfassen. Abschließend weist der vorliegende Band auf zukünftig notwendige Forschungsschwerpunkte und die Schaffung hierfür angemessener Rahmenbedingungen hin.