Description: Das Projekt "Variability of Solar Irradiance, Oscillations, and Seismology of the Sun" wird vom Umweltbundesamt gefördert und von Physikalisch-Meteorologisches Observatorium Davos und Weltstrahlungszentrum (PMOD,WRC) durchgeführt. The research projects of PMOD/WRC aim at understanding the terrestrial radiation budget and the influence of the Sun on the terrestrial climate. The latter is in the central focus of today's world-wide climate research and is termed 'Space Weather' if the emphasis is on short term events and it is termed 'Space Climate, if climate implications are investigated. From the point of view of the activities of PMOD/WRC, the most interesting aspect of research in solar physics is that the radiance output of the Sun itself is variable. The goal of solar physics research at PMOD/WRC is therefore, to advance our understanding of the origin of these variations in order to be able to reconstruct the solar influence on the climate in the past. The SNF grant supports: A) Interpretation of data from active space experiments: Presently, there are two active space experiments built by PMOD/WRC: VIRGO on SoHO since December 1995, which is still operational, and SOVIM on the ISS since February 2008; B) Preparing for the scientific exploitation of the upcoming space experiment LYRA/PROBA2 and PREMOS on PICRAD (with launch in 2009); C) Investigating the origin of the solar radiance variability in the UV by exploring the lower chromosphere with helioseismological methods. Since 1996 the space experiment VIRGO/SoHO is monitoring the Total (TSI) and spectral Solar Irradiance. The homogeneous VIRGO data provide a crucial element in the construction of the TSI composite and thus, VIRGO provides a key observation to investigate the influence of the Sun on the terrestrial climate. The PMOD/WRC is involved in three new space missions that continue the observations of total and spectral solar irradiance: SOVIM on the ISS since February 2008 and with launch in 2009 LYRA on PROBA2, and PREMOS on PICARD. SOVIM on the ISS continues to monitor total and spectral solar irradiance with instrumentation similar to VIRGO/SOHO. Together with the two other experiments SOLSPEC and SolACES on the same platform, which observe the spectral irradiance from the EUV to the near infrared, our knowledge of the spectral redistribution during TSI changes will be improved and provide a sound basis for understanding of solar irradiance variability. LYRA/PROBA2 observations will be used for a climate-chemistry model that was developed at PMOD/WRC as part of an ETH-funded Poly-project. When LYRA data become available we will use a special middle atmosphere version of this CCM model, SOCOL-I, for now-casting the state of the upper atmosphere as reaction to the UV irradiance as observed by LYRA/PROBA2. This now casting is primarily aimed at testing our understanding of the chemical and dynamical processes induced by the variable solar UV irradiance, but if successful, our now casting product is a welcome additional input for space weather applications. Until the launch of PROBA2, this subproject is aimed at preparing the computer model for its operational use.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Computer ? Verbundwerkstoff ? Davos ? Pflanzensamen ? Abraum ? Klimatologie ? Strahlungshaushalt ? Physik ? Seismik ? Erschütterung ? Strahlung ? Abgrabung ? Daten ? Emission ? Monitoring ? Klimaforschung ? Beleuchtungsstärke ? Verwitterung ? Chemikalien ? Mittlere Atmosphäre ? Obere Atmosphäre ? Forschungsprojekt ? Finanzierung ? Forschung ? Klima ? Klimabeeinflussung ? Produkt ? Schall ? Wetter ? Globale Aspekte ? Änderung ? Staat ? Klimadaten ? Zins ? AUSBEUTUNG ? EXPERIMENT ? Erlass [Recht] ? FOERDERN ? FORTSCHRITTLICH ? KONNEX ? KURZ ? LAENDER ? METHODE ? NEU ? PROJEKT ? RAUM ? SICHT ? SONSTIG ? TEIL ? UMVERTEILUNG ? VERBINDUNG ? VERFUEGBAR ? Verwertung ? Vorgang ? WISSENSCHAFTLICH ? ASPEKT ? BEREICH ? BESONDER ? BETRACHTUNG ? Bahnsteig ? DAUER ? EINSATZ ?
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 2008-04-01 - 2010-03-31
Accessed 1 times.