Vol. 20, issue 01, article # 10

Abstract:

We present some results of monitoring of total solar radiation performed at the TOR station of IAO SB RAS, Tomsk, in 1995–2005. It is found that, for the considered period, the radiative regime near Tomsk was quite stable with maximum annual total solar radiation in 2003. The magnitude and variability of monthly total radiation changed from season to season. In spring–summer period, the coefficient of variation of monthly total radiation was within 15–16%, and in winter it increased up to 20%. The interannual variation of the monthly total radiation for each month had positive trend except in March, July, and September. We studied the amount of total incoming radiation as a function of the type of air mass and synoptic conditions. The total incoming radiation during a year is found to depend, in a complicated way, on the type of air mass and this dependence reflects specific features of the atmospheric general circulation over the region. The daily total radiation is on the average 1.6 times larger during anticyclone than during cyclone throughout the year. The maximum daily total incoming radiation is observed in the northeast part of a cyclone, and for south and southwest part in an anticyclone.