Details
| Originalsprache | Deutsch |
|---|---|
| Seiten (von - bis) | 2805-2808 |
| Seitenumfang | 4 |
| Fachzeitschrift | Geophysical research letters |
| Jahrgang | 21 |
| Ausgabenummer | 25 |
| Publikationsstatus | Veröffentlicht - 1994 |
Abstract
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in: Geophysical research letters, Jahrgang 21, Nr. 25, 1994, S. 2805-2808.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Simultaneous spectroradiometry: A study of solar UV irradiance at two altitudes
AU - Blumthaler, M.
AU - Webb, A. R.
AU - Seckmeyer, G.
AU - Bais, A. F.
AU - Huber, M.
AU - Mayer, B.
N1 - https://doi.org/10.1029/94GL02786
PY - 1994
Y1 - 1994
N2 - Spectrally resolved measurements of solar ultraviolet (UV) radiation were made at adjacent mountain top and valley sites, vertically separated by 1 km. Data was collected over a period of 4 days in August 1993 providing simultaneously measured spectra for a range of zenith angles with both sites in direct sunlight and less than 2 octas of cloud cover. As there was no snow cover the local albedo was similar at both sites. Irradiances at the mountain site were 9% higher than the valley at 370 nm, increasing gradually to 11% at 320 nm. Across the UVB waveband the altitude effect increased dramatically to 24% at 300 nm. The magnitude of the altitude effect was independent of zenith angle, within the measurement accuracy, for the range z = 30°?70°. These measured differences between the mountain and valley station can be interpreted by model calculations using the corresponding differences in air pressure, column ozone and aerosol content.
AB - Spectrally resolved measurements of solar ultraviolet (UV) radiation were made at adjacent mountain top and valley sites, vertically separated by 1 km. Data was collected over a period of 4 days in August 1993 providing simultaneously measured spectra for a range of zenith angles with both sites in direct sunlight and less than 2 octas of cloud cover. As there was no snow cover the local albedo was similar at both sites. Irradiances at the mountain site were 9% higher than the valley at 370 nm, increasing gradually to 11% at 320 nm. Across the UVB waveband the altitude effect increased dramatically to 24% at 300 nm. The magnitude of the altitude effect was independent of zenith angle, within the measurement accuracy, for the range z = 30°?70°. These measured differences between the mountain and valley station can be interpreted by model calculations using the corresponding differences in air pressure, column ozone and aerosol content.
U2 - 10.1029/94GL02786
DO - 10.1029/94GL02786
M3 - Artikel
VL - 21
SP - 2805
EP - 2808
JO - Geophysical research letters
JF - Geophysical research letters
SN - 0094-8276
IS - 25
ER -