Temperature variability on the area of Stara planlna in the instrumental period

Abstract

In this paper are presented the results of research, considering on air temperature variability in Stara planina area. In southeast part of researched area it is noticed negative trend in the last 50 years of XX century, according to data of IPCC for Southeast Europe. Emphasized air temperature increase in summer period in almost stations is not pointed on dominant influence of anthropogenic greenhouse effect.