ANTHROPOGENIC CO2 EMISSION RECORDS IN SCOTS PINE GROWING IN THE MOST INDUSTRIALIZED REGION OF POLAND FROM 1975 TO 2014

Stable carbon isotope ratios and radiocarbon (C-14) concentrations in samples of pine wood (AD 1975-2012) from 3 sites, as well as needles (AD 2012-2014) collected from 15 sites, in a heavily urbanized area in proximity to heavy industrial factories in Poland were analyzed as bio-indicators of CO2 emissions. The sampling sites were located at different distances from point sources. The stable isotopic composition was determined using an isotope ratio mass spectrometer, and the C-14 concentration was determined using a liquid scintillation counter and an accelerator mass spectrometer. Spatial and temporal variability of delta C-13 and Delta C-14 in tree ring cellulose and needles was noted in all regions. A negative correlation between delta C-13 tree ring cellulose and anthropogenic CO2 emissions has been observed. The ratio of delta C-13 in tree ring cellulose to delta C-13 in needles created in the same year is equal to 1.2 at the investigated sites.