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Atmospheric Δ14CO2 trend in Western European background air from 2000 to 2012 Cover

Atmospheric Δ14CO2 trend in Western European background air from 2000 to 2012

Tellus B: Chemical and Physical Meteorology
Volume 65 (2013): Issue 1
By: ,   and    
Open Access
|Jan 2013
Figures & tables

Figures & Tables

Fig. 1. 

Δ14CO2 trends in background air over Europe 2000–2012. (a) Individual data from Jungfraujoch with 1σ error bars together with a harmonic fit curve calculated through the monthly mean data; the outlier in spring 2000 is a contaminated sample and is not included in the monthly mean values of Table 1, (b) Schauinsland monthly means in comparison with the Jungfraujoch fit curve from (a) and May–August (spring and summer) mean values with 1σ standard deviation of the four monthly values.

Table 1. Monthly mean Δ14CO2 data from Jungfraujoch and Schauinsland as well as monthly values from the fitted curve through Jungfraujoch data. Last column gives spring and summer mean values (including 1 sigma standard deviations of the monthly averaged data).

Jungfraujoch JFJ fit curve Schauinsland SIL summer Δ14C Δ14C Δ14C May–Aug Decimal date Month [‰] [‰] [‰] [‰] 2000.044 1 92.3 91.31 86.9 2000.126 2 91.0 90.03 89.3 2000.208 3 89.4 89.15 84.6 2000.291 4 85.2 88.74 83.7 2000.374 5 87.2 88.73 87.6 86.5±2.0 2000.458 6 88.8 88.96 84.1 2000.541 7 90.6 89.20 85.9 2000.626 8 92.3 89.21 88.5 2000.709 9 88.6 88.82 85.9 2000.792 10 86.5 87.95 85.3 2000.876 11 84.8 86.65 87.5 2000.959 12 84.7 85.09 85.4 2001.044 1 84.6 83.51 79.5 2001.125 2 80.9 82.16 73.4 2001.206 3 80.6 81.23 80.1 2001.289 4 77.3 80.82 74.7 2001.374 5 81.0 80.91 79.4 80.8±1.6 2001.458 6 82.1 81.34 80.8 2001.541 7 83.9 81.89 83.1 2001.626 8 82.8 82.30 79.8 2001.709 9 81.1 82.38 80.9 2001.792 10 83.0 82.02 83.3 2001.876 11 81.8 81.22 76.7 2001.959 12 80.5 80.12 77.1 2002.044 1 77.7 78.93 73.1 2002.125 2 75.2 77.88 71.6 2002.206 3 76.2 77.15 70.3 2002.289 4 74.6 76.85 67.5 2002.374 5 75.6 76.96 73.9 74.8±1.4 2002.458 6 78.6 77.33 75.1 2002.541 7 79.1 77.74 76.7 2002.626 8 80.9 77.94 73.5 2002.709 9 79.3 77.73 74.5 2002.792 10 76.2 77.00 70.5 2002.876 11 74.5 75.77 67.3 2002.959 12 68.3 74.18 67.9 2003.044 1 70.6 72.47 66.0 2003.125 2 69.8 70.93 62.0 2003.206 3 70.2 69.78 62.3 2003.289 4 66.6 69.17 65.8 2003.374 5 70.4 69.13 67.3 69.1±1.4 2003.458 6 70.4 69.54 70.2 2003.541 7 73.7 70.16 68.7 2003.626 8 71.9 70.74 70.1 2003.709 9 70.3 70.99 68.1 2003.792 10 69.5 70.75 67.5 2003.876 11 68.4 69.95 65.3 2003.959 12 65.7 68.67 63.6 2004.044 1 63.4 67.10 61.5 2004.125 2 64.0 65.48 58.7 2004.206 3 65.5 64.10 56.3 2004.289 4 62.5 63.13 57.7 2004.374 5 62.3 62.69 56.0 2004.458 6 64.3 62.74 63.4 61.5±3.7 2004.541 7 63.3 63.13 62.9 2004.626 8 64.0 63.66 63.9 2004.709 9 65.2 64.10 62.6 2004.792 10 62.1 64.05 62.3 2004.876 11 63.1 63.47 59.0 2004.959 12 63.4 62.62 61.4 2005.044 1 63.1 61.69 56.1 2005.125 2 60.1 60.86 49.0 2005.206 3 60.1 60.28 51.8 2005.289 4 56.1 60.03 54.3 2005.374 5 62.3 60.09 58.4 57.9±0.8 2005.458 6 59.3 60.36 57.2 2005.541 7 63.9 60.66 58.7 2005.626 8 60.1 60.82 57.1 2005.709 9 60.8 60.71 54.6 2005.792 10 59.3 60.28 53.6 2005.876 11 60.0 59.55 54.8 2005.959 12 57.2 58.65 50.8 2006.044 1 58.0 57.76 51.1 2006.125 2 58.0 57.06 46.9 2006.206 3 55.4 56.68 48.4 2006.289 4 54.8 56.69 53.6 2006.374 5 56.4 57.03 55.3 57.0±2.0 2006.458 6 59.2 57.57 55.2 2006.541 7 59.1 58.11 58.8 2006.626 8 62.0 58.43 58.5 2006.709 9 57.1 58.38 54.6 2006.792 10 57.8 57.88 56.3 2006.876 11 52.6 56.95 55.2 2006.959 12 54.0 55.71 54.1 2007.044 1 54.7 54.37 56.9 2007.125 2 54.2 53.14 49.3 2007.206 3 50.5 52.21 46.8 2007.289 4 52.9 51.70 45.3 2007.373 5 51.0 51.62 48.7 50.1±1.0 2007.456 6 53.0 51.88 50.3 2007.540 7 53.2 52.31 50.7 2007.625 8 52.8 52.71 50.7 2007.708 9 52.9 52.89 53.3 2007.792 10 49.6 52.74 45.0 2007.875 11 49.7 52.22 46.1 2007.959 12 52.4 51.40 46.1 2008.044 1 51.3 50.40 45.4 2008.125 2 51.9 49.40 44.4 2008.206 3 49.3 48.56 43.7 2008.289 4 46.2 47.97 43.5 2008.374 5 42.5 47.65 44.2 47.1±2.7 2008.458 6 46.0 47.56 45.6 2008.540 7 49.1 47.56 50.0 2008.625 8 49.3 47.50 48.6 2008.708 9 46.6 47.26 47.0 2008.792 10 49.1 46.77 42.7 2008.875 11 44.5 46.06 42.4 2008.959 12 42.3 45.22 38.4 2009.044 1 45.0 44.43 39.4 2009.125 2 43.8 43.87 37.3 2009.206 3 45.3 43.70 37.6 2009.289 4 39.4 43.98 38.9 2009.374 5 46.3 44.71 43.6 46.7±2.2 2009.458 6 48.2 45.74 48.8 2009.540 7 49.5 46.85 46.8 2009.625 8 49.8 47.80 47.6 2009.708 9 47.8 48.36 42.7 2009.792 10 47.3 48.38 na 2009.875 11 44.7 47.80 39.0 2009.959 12 44.7 46.73 39.3 2010.044 1 45.1 45.33 32.3 2010.125 2 45.1 43.88 34.8 2010.206 3 38.8 42.61 37.4 2010.289 4 41.5 41.73 33.9 2010.374 5 42.2 41.36 38.0 40.0±2.7 2010.458 6 39.9 41.48 37.8 2010.541 7 42.6 41.97 40.7 2010.626 8 44.5 42.63 43.5 2010.709 9 47.1 43.22 41.5 2010.792 10 41.4 43.47 42.2 2010.876 11 42.5 42.97 37.7 2010.959 12 41.1 42.13 33.6 2011.044 1 39.7 41.10 38.2 2011.125 2 40.5 40.08 32.0 2011.206 3 39.3 39.23 31.4 2011.289 4 39.5 38.69 35.8 2011.374 5 38.0 38.49 35.6 39.0±2.4 2011.458 6 39.4 2011.541 7 41.0 2011.626 8 40.1 2011.709 9 37.8 2011.792 10 32.6 2011.876 11 33.4 2011.959 12 32.8 2012.044 1 32.8 2012.125 2 25.2 2012.206 3 33.7 2012.289 4 31.8 2012.374 5 28.7 31.5±2.0 2012.458 6 31.4 2012.541 7 33.4 2012.626 8 32.3 2012.709 9 32.5
DOI: https://doi.org/10.3402/tellusb.v65i0.20092 | Journal eISSN: 1600-0889
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Language: English
Page range: 20092 - 20092
Submitted on: Nov 14, 2012
Accepted on: Feb 2, 2013
Published on: Jan 1, 2013
Published by: Stockholm University Press
In partnership with: Paradigm Publishing Services
Keywords:
carbon dioxide,
radiocarbon,
clean air reference

© 2013 Ingeborg Levin, Bernd Kromer, Samuel Hammer, published by Stockholm University Press
This work is licensed under the Creative Commons Attribution 4.0 License.

Volume 65 (2013): Issue 1
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