HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

The YAK-AEROSIB transcontinental aircraft campaigns: new insights on the transport of CO 2 , CO and O 3 across Siberia

Abstract : Two airborne campaigns were carried out to measure the tropospheric concentrations and variability of CO 2 , CO and O 3 over Siberia. In order to quantify the influence of remote and regional natural and anthropogenic sources, we analysed a total of 52 vertical profiles of these species collected in April and September 2006, every ∼200 km and up to 7 km altitude. CO 2 and CO concentrations were high in April 2006 (respectively 385-390 ppm CO 2 and 160-200 ppb CO) compared to background values. CO concentrations up to 220 ppb were recorded above 3.5 km over eastern Siberia, with enhancements in 500-1000 m thick layers. The presence of CO enriched air masses resulted from a quick frontal uplift of a polluted air mass exposed to northern China anthropogenic emissions and to fire emissions in northern Mongolia. A dominant Asian origin for CO above 4 km (71.0%) contrasted with a dominant European origin below this altitude (70.9%) was deduced both from a transport model analysis, and from the contrasted CO/ CO 2 ratio vertical distribution. In September 2006, a significant O 3 depletion (∼-30 ppb) was repeatedly observed in the boundary layer, as diagnosed from virtual potential temperature profiles and CO 2 gradients, compared to the free troposphere aloft, suggestive of a strong O 3 deposition over Siberian forests.
Document type :
Journal articles
Complete list of metadata

Cited literature [60 references]  Display  Hide  Download

Contributor : Florence Aptel Connect in order to contact the contributor
Submitted on : Thursday, October 29, 2020 - 11:01:48 AM
Last modification on : Monday, May 16, 2022 - 8:20:16 AM
Long-term archiving on: : Saturday, January 30, 2021 - 6:12:42 PM


The YAK AEROSIB transcontinent...
Publisher files allowed on an open archive



J.-D. Paris, P. Ciais, P. Nedelec, M. Ramonet, B. Belan, et al.. The YAK-AEROSIB transcontinental aircraft campaigns: new insights on the transport of CO 2 , CO and O 3 across Siberia. Tellus B - Chemical and Physical Meteorology, Taylor & Francis, 2008, 60 (4), pp.551-568. ⟨10.1111/j.1600-0889.2008.00369.x⟩. ⟨hal-02926830⟩



Record views


Files downloads