Quality assurance of a solar UV network in the Antarctic

Póster elaborado para la 27th General Assembly of the European Geophysical Society celebrada en Niza los días 21-26 de abril de 200

Correcting Stray Light in Single-monochromator Brewer Spectrophotometers

Póster presentado en: Quadrennial Ozone Symposium 2012 (QOS 2012), celebrado del 27 al 31 de agosto de 2012 en Toronto, Canada

Correction and validation of total ozone data series from an antarctic multichannel filter radiometer solar UV network

Póster elaborado para la 27th General Assembly of the European Geophysical Society celebrada en Niza los días 21-26 de abril de 2002The MAR Project is financed by the National R+D Plan of the Ministry of Science and Technology (National Research Program at the Antarctica) under contract REN2000-0245-C02-2

The NILU-UV6 multichannel moderate bandwidth filter radiometer in the MAR project’s Antarctic network

Ponencia presentada en: 3ª Asamblea Hispano Portuguesa de Geodesia y Geofisica, celebrada en Valencia en 2002During the last years multichannel moderate bandwidth filter instruments have been used for UV radiation measurement and the reconstruction of the solar spectra. These instruments are now part of several UV and ozone monitoring networks, due to its easy management, low maintenance, robustness and high efficiency. In this work the characteristics, the algorithms for different products calculation, and the quality control and quality assurance system of the multichannel filter radiometer NILU-UV6 are presented. This instrument measures at five UV channels (305, 312, 320, 340 and 380 nm) and PAR (400-700 nm) channel. A radiative transfer model is used to calculate the total ozone content, clouds transmitance and the biologically effective UV doses. The preliminary results obtained by the NILU-UV6 instruments of the MAR project (Measurement of Antarctic radiance for monitoring the ozone layer) Antarctic network, managed by the Instituto Nacional de Meteorología (INM) and the Instituto Nacional de Técnica Aeroespacial (INTA), are also shown and discussed

The effect of vernal solar UV radiation on serum 25-hydroxyvitamin D concentration depends on the baseline level : observations from a high latitude in Finland

Humans obtain vitamin D from conversion of 7-dehydrocholesterol in the skin by ultraviolet B (UVB) radiation or from dietary sources. As the radiation level is insufficient in winter, vitamin D deficiency is common at higher latitudes. We assessed whether vernal solar UVB radiation at latitudes 61 degrees N and 67 degrees N in Finland has an impact on serum 25-hydroxyvitamin D [S-25(OH) D] concentrations. Twenty-seven healthy volunteers participated in outdoor activities in snow-covered terrain for 4-10 days in March or April, with their face and hands sun-exposed. The personal UVB doses and S-25(OH) D levels were monitored. A mean UVB dose of 11.8 standard erythema doses (SED) was received during an average of 12.3 outdoor hours. The mean S-25(OH) D concentration in subjects with a baseline concentration below 90.0 nmol/L (n=13) increased significantly, by 6.0 nmol/L from an initial mean of 62.4 nmol/L (pPeer reviewe