Three years of aircraft-based trace gas measurements over the Fyodorovskoye southern taiga forest, 300 km north-west of Moscow

• Published in: Tellus B: Chemical and Physical Meteorology
• Main Authors: Ramonet, M., Ciais, P., Nepomniachii, I., Sidorov, K., Neubert, R., Langendörfer, U., Picard, D., Kazan, V., Biraud, S., Gusti, M., Kolle, O., Schulze, E.-D., Lloyd, J.
• Other Authors: Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), ICOS-RAMCES (ICOS-RAMCES), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), ICOS-ATC (ICOS-ATC), Russian Academy of Sciences Moscow (RAS), University of Groningen Groningen, Universität Heidelberg Heidelberg, Max Planck Institute for Biogeochemistry (MPI-BGC), Max-Planck-Gesellschaft, Max-Planck-Institut für Biogeochemie (MPI-BGC)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2002
• Subjects: [SDU.OCEAN]Sciences of the Universe [physics]/Ocean; Atmosphere; [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces; environment; taiga
• Online Access: https://hal.archives-ouvertes.fr/hal-02924415; https://hal.archives-ouvertes.fr/hal-02924415/document; https://hal.archives-ouvertes.fr/hal-02924415/file/Three%20years%20of%20aircraft%20based%20trace%20gas%20measurements%20over%20the%20Fyodorovskoye%20southern%20taiga%20forest%20300%20km%20north%20west%20of%20Moscow.pdf; https://doi.org/10.3402/tellusb.v54i5.16720

International audience (2002) Three years of aircraft-based trace gas measurements over the Fyodorovskoye southern taiga forest, 300 km northwest of Moscow, Tellus B: Chemical and Physical Meteorology, 54:5, 713-734, ABSTRACT As part of the EUROSIBERIAN CARBONFLUX project, regular measurements have been performed in the lower troposphere over a southern taiga forest area in Fyodorovskoye, Western Russia (56 • 28 N, 32 • 56 E). Up to 70 flights have been made between May 1998 and December 2000, plus additional intensive campaigns to study the diurnal variability of atmospheric trace gases within the boundary layer. We sampled flasks between 100 and 3000 m for analysis of CO 2 , δ 13 C and δ 18 O in CO 2 , CH 4 and CO. In addition, in-situ CO 2 , relative humidity, pressure and temperature were performed for a better description of the vertical variability and accurate determination of the boundary layer height. The peak-to-peak amplitude of the seasonal cycle of atmospheric CO 2 within the boundary layer of 26.5 ppm is about twice the one observed in the free troposphere (14.6 ppm). The spring draw down of CO 2 also occurs one month earlier than in the free troposphere aloft. There is also an increase by factor of two in the vertical variability of CO 2 within the free troposphere between summer and winter, which may be related to the variability of advection and mixing. Linear regression analysis applied to flask measurements of CO, CH 4 and δ 13 C versus CO 2 in the free troposphere indicates that industrial emissions over Europe are a dominant source of synoptic variability in wintertime in air masses reaching Fyodorovskoye. On the other hand, the variability of trace gases in the boundary layer observed during intensive campaigns is consistent with the patterns of proximate sources over the underlying southern taiga landscape at Fyodorovskoye.