Προσωπικό Σχετικά με το LAP Νέα-Ανακοινώσεις Προτενόμενες διασυνδέσεις Επικοινωνήστε με το LAP Αρχική Σελίδα
education projects groups equipment services
Variability of UV-B at four stations in Europe
Zerefos, C. S., D. S. Balis, A. F. Bais, D. Gillotay, P. C. Simon, B. Mayer and G. Seckmeyer
[abstract]
The variability of solar irradiance in the UV-B spectral region is studied at four stations operating well-calibrated spectroradiometers during the period 1991-96. It is confirmed that total ozone is the controlling factor in long-term changes of solar irradiance below 320 nm received at the ground. This result is supported by the similar long-term variability under clear sky and all sky conditions during the past five years. The study includes estimates of the amplitude of the annual cycle and estimates of long-term changes. An important result of this note is, that calculated changes in solar irradiance depend on the length of the observational period and that any speculations on its future changes should be treated always with caution. It is estimated that a 2.7% change per year in solar irradiance at 305 nm at Thessaloniki is a rate that could possibly continue in view of the expected continuation of the ozone decline resulting to an increase of 27% per decade, which is comparable to the amplitude of the annual cycle at that station.
[keywords]
UV-B Radiation
Geophys. Res. Lett., 24, 11, 1363-1366, 1997
  
back to publications list
  SEARCH
 
News Projects Research
Environmental Predictions
  LAP Projects
PHAETHON
APICE
ΠΥΘΑΓΟΡΑΣ
GEMS project
UV NET
Ε.Δ.Η.Ε.
Hrakleitos
MACC project
ΠΡΟ.ΤΕ.ΠΕ.
EUMETSAT
PHOENICS
PASODOBLE
QASUME
REMEDIO
SCOUT-O3
OMI-VAL
  LAP Activities
BOUNDARY LAYER GROUP
ENVIRONMENTAL FORECASTING
OZONE MAPPING
UV INDEX
UV MONITORING NETWORK
  Hosted
BALKAN PHYSICAL UNION
POST GRADUATE STUDIES
ΜΑR. KANAG. INSTITUTE


Ελληνική έκδοση


Laboratory of Atmospheric Physics - Physics Department, A.U.Th. Greece.
Secretariat: tel. +30 2310 998156 fax. +30 2310 998090 e-mail: lap@physics.auth.gr