Estimates of Trends of Climatically Important Atmospheric Gases Near St. Petersburg.

Autor: Timofeev, Yu. M., Polyakov, A. V., Virolainen, Ya. A., Makarova, M. V., Ionov, D. V., Poberovsky, A. V., Imhasin, H. H.
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Zdroj: Izvestiya, Atmospheric & Oceanic Physics; Jan2020, Vol. 56 Issue 1, p79-84, 6p
Abstrakt: Total column amounts (TCAs) of various climatically important atmospheric gases have been determined in Peterhof for the period between 2009 and 2018. These measurements were performed using a Bruker 125HR ground-based IR Fourier transform spectrometer, which registered the spectra of direct solar radiances. We estimated the trends for TCAs of 13 climatically important gases for the first time in Russia. For nine of them, these estimates are reliable. Trends of the main greenhouse gases, CO2, CH4, and N2O, determined with high accuracy (~0.02%), are positive and equal 0.52, 0.42, and 0.28% per year, respectively. The comparison of methane trend estimates with earlier ones demonstrates that in recent years the trend of methane TCAs near St. Petersburg has been increased. Moreover, we observe the negative trends in TCAs of tropospheric ozone (–0.75 ± 0.56% per year), CFC-11 and CFC-12 (~–0.5–1.0% per year), and ClONO2 (–2% per year). Trends for HF and HCFC-22 TCAs near St. Petersburg are positive, providing ~1–2% per year. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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