TY JOUR TI AIR TEMPERATURE EXTREMUM DYNAMICS - FACTOR OF CLIMATE WARMING IN CENTRAL TUVA HOLLOW OF THE TUVA REPUBLIC KW climate warming KW air temperature extrema KW intermountain hollows KW Tuva Republic JO Bulletin of KSAU AU Andreychik, M.F. PY 2014 IS PB Krasnoyarsk State Agrarian University