Study of trends of total CO and CH4 contents over Eurasia through analysis of ground-based and satellite spectroscopic measurements


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Abstract

Trends of total CO and CH4 contents are estimated from satellite AIRS spectrometer data for the Eurasian domain (0–180° E, 0–85° N) for different time periods and seasons. The results are compared with similar estimates, obtained from ground-based spectroscopic measurements at seven stations of the European Network for the Detection of Atmospheric Composition Change (NDACC) and at measurement sites of the Institute of Atmospheric Physics, Russian Academy of Sciences (Zvenigorod Scientific Station (ZSS), Zotto, and Beijing) and St. Petersburg University (Peterhof), located in the study domain. Overall, the total CO decreased over northern Eurasia during the period of 2003–2015 at a rate of 0.05–1.5%/yr, depending on the region; while the total CH4 increased at a rate of 0.16–0.65%/yr. Since 2007, the total CO has been increased during summer and autumn months in most mid- and high-latitude Eurasian background regions, and the total CH4 growth has been accelerated. Changes in the global photochemical system, proceeding against the background of global climate change and, in particular, changes in the “sources/sinks” ratio for minor atmospheric admixtures are suggested as possible causes of this dynamic of trends of the atmospheric CO and CH4 contents.

About the authors

V. S. Rakitin

Obukhov Institute of Atmospheric Physics

Author for correspondence.
Email: vadim@ifaran.ru
Russian Federation, Moscow, 119017

N. F. Elansky

Obukhov Institute of Atmospheric Physics

Author for correspondence.
Email: n.f.elansky@mail.ru
Russian Federation, Moscow, 119017

N. V. Pankratova

Obukhov Institute of Atmospheric Physics

Email: n.f.elansky@mail.ru
Russian Federation, Moscow, 119017

A. I. Skorokhod

Obukhov Institute of Atmospheric Physics

Email: n.f.elansky@mail.ru
Russian Federation, Moscow, 119017

A. V. Dzhola

Obukhov Institute of Atmospheric Physics

Email: n.f.elansky@mail.ru
Russian Federation, Moscow, 119017

Yu. A. Shtabkin

Obukhov Institute of Atmospheric Physics

Email: n.f.elansky@mail.ru
Russian Federation, Moscow, 119017

P. Wang

Institute of Atmospheric Physics

Email: n.f.elansky@mail.ru
China, Beijing, 100029

G. Wang

Institute of Atmospheric Physics

Email: n.f.elansky@mail.ru
China, Beijing, 100029

A. V. Vasilieva

Obukhov Institute of Atmospheric Physics

Email: n.f.elansky@mail.ru
Russian Federation, Moscow, 119017

M. V. Makarova

St. Petersburg State University

Email: n.f.elansky@mail.ru
Russian Federation, Peterhof, 198504

E. I. Grechko

Obukhov Institute of Atmospheric Physics

Email: n.f.elansky@mail.ru
Russian Federation, Moscow, 119017

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