Atmospheric CO2, delta(O-2/N-2), APO and oxidative ratios from aircraft flask samples over Fyodorovskoye, Western Russia

van der Laan, S., van der Laan-Luijkx, I. T., Roedenbeck, C., Varlagin, A., Shironya, I., Neubert, R. E. M., Ramonet, M. and Meijer, H. A. J. (2014) Atmospheric CO2, delta(O-2/N-2), APO and oxidative ratios from aircraft flask samples over Fyodorovskoye, Western Russia. Atmospheric Environment, 97. pp. 174-181. ISSN 1352-2310

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Abstract

We present atmospheric CO2 and delta(O-2/N-2) from flask samples taken on board aircraft over Fyodorovskoye (56 degrees 27'N, 32 degrees 55'E) at heights of 3000 m and 100 m between 1998 and 2008. The long-term trends for CO2 and delta(O-2/N-2) are similar for both sampling heights, and also similar to observations from marine background station Mace Head (Ireland) and coastal station Lutjewad (the Netherlands). The seasonal CO2 amplitude at 100 m was almost twice as large as at 3000 m and a phase shift in the seasonality of about two weeks between both sampling heights was observed. This indicates a dominant influence on CO2 in the boundary layer from the regional biosphere which is confirmed by analysis of the delta(O-2/N-2) to CO2 oxidative ratio (OR). Together with simulations with the TM3 model, our data suggest that the observed OR of -1.7 +/- 0.2 in the free troposphere is mainly driven by exchange processes with the ocean. Within the boundary layer an OR of -0.89 +/- 0.12 was observed which supports the results of other recent studies suggesting the commonly used value of -1.1 for biospheric OR is likely too low. (C) 2014 Elsevier Ltd. All rights reserved.

Item Type: Article
Uncontrolled Keywords: atmospheric co2,n-2),oxidative ratio,global carbon cycle,apo,southern taiga,carbon-cycle,oxygen,n-2,siberia,air,climatology,variability,network,tower
Faculty \ School: Faculty of Science > School of Environmental Sciences
Depositing User: Pure Connector
Date Deposited: 08 Dec 2015 17:01
Last Modified: 02 Sep 2019 14:30
URI: https://ueaeprints.uea.ac.uk/id/eprint/55733
DOI: 10.1016/j.atmosenv.2014.08.022

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