Abstract：
:Black carbon (BC) contents were measured in recent sediments in five high altitude remote alpine lakes, i.e. Lake Krisko Sup., Lake Ledvica, Lake Planina, Lake Krn and Lovrensko Lake, and the eutrophic subalpine Lake Bled in Slovenia to follow the history of atmospheric pollution of fossil fuel and local biomass burning in Alps. Organic carbon (OC), its 13C values, total nitrogen and sedimentation rates using 210Pb activity data were also measured. The highest BC contents, reaching 20 mg/gdw, were noted in remote alpine lakes while in the subalpine Lake Bled sediment the concentrations were lower reaching 5 mg/gdw. Lower BC/OC ratios, ranging between 4% and 8%, were typical for remote alpine lakes and increased to about 10% in subalpine Lake Bled. The latter clearly shows the marked importance of local direct pollution sources in comparison to remote atmospheric input which decreases in a W-E direction in parallel with decreasing amounts of precipitation. Based on 210Pb sedimentation data, the minimal BC accumulation rates in sediment cores were detected in the pre-industrialisation period. In the last decades of 20th century the BC contents decreased probably due to reduced emission of pollutants.
journal_name
Chemospherejournal_title
Chemosphereauthors
Muri G,Cermelj B,Faganeli J,Brancelj Adoi
10.1016/s0045-6535(01)00295-8subject
Has Abstractpub_date
2002-03-01 00:00:00pages
1225-34issue
8eissn
0045-6535issn
1879-1298pii
S0045-6535(01)00295-8journal_volume
46pub_type
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