Monitoring of acid deposition in central Yakutia

• Main Author: Vladimir N. Makarov
• Format: Report
• Language: English
• Published: Melnikov Permafrost Institute, Siberian Branch of Russian Academy of Sciences 2006
• Subjects: Yakutia; atmospheric; acid precipitations; monitoring; Yakutsk; Memoirs of National Institute of Polar Research; Polar Research
• Online Access: https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2512; http://id.nii.ac.jp/1291/00002512/; https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2512&item_no=1&attribute_id=18&file_no=1

The results of monitoring acid precipitations showed that subacid-alkalescent precipitations, acidity of which varies in close limits (pH 5.89-7.36) prevail in Yakutsk region. Acidity of solid precipitation is very similar to acidity of rain precipitations and comprises 6.70-7.22 for operating pH of rain precipitations (6.85 in average) and 5.89-7.36 for solid precipitations (6.71 in average). The most considerable deviations of acidity-alkalinity of solid precipitation from the average value are observed at the beginning and in the middle of winter period. According to the monitoring results we made an evaluation of the value of chemical components fall-out in atmospheric precipitations. Annual inflow of H^+ ions from atmosphere to the earth surface is much less then critical load for the forest and water ecosystems. Maximal values of sulfur compounds (0.51g/m^2) and nitrogen (2.07g/m^2) fall-out at the monitoring station fall on June and exceed ecostandard and parameters of ecological emergency situation in a volume of nitrogen precipitations.