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Analysis of Co2 Mole Fraction Data: First Evidence of Large-scale Changes in Co2 Uptake at High Northern Latitudes : Volume 15, Issue 5 (10/03/2015)

By Barlow, J. M.

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Book Id: WPLBN0003997191
Format Type: PDF Article :
File Size: Pages 51
Reproduction Date: 2015

Title: Analysis of Co2 Mole Fraction Data: First Evidence of Large-scale Changes in Co2 Uptake at High Northern Latitudes : Volume 15, Issue 5 (10/03/2015)  
Author: Barlow, J. M.
Volume: Vol. 15, Issue 5
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2015
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Palmer, P. I., Bruhwiler, L. M., Tans, P., & Barlow, J. M. (2015). Analysis of Co2 Mole Fraction Data: First Evidence of Large-scale Changes in Co2 Uptake at High Northern Latitudes : Volume 15, Issue 5 (10/03/2015). Retrieved from http://community.ebooklibrary.org/


Description
Description: School of GeoSciences, University of Edinburgh, UK. Atmospheric variations of carbon dioxide (CO2) mole fraction reflect changes in atmospheric transport and regional patterns of surface emission and uptake. We report new estimates for changes in the phase and amplitude of observed high northern latitude CO2 seasonal variations, indicative of biospheric changes, by spectrally decomposing multi-decadal records of surface CO2 mole fraction using a wavelet transform to isolate the changes in the observed seasonal cycle. We also perform similar analysis of the first time derivative of CO2 mole fraction, ΔtCO2, that is a crude proxy for changes in CO2 flux. Using numerical experiments, we quantify the aliasing error associated with independently identifying trends in phase and peak uptake and release to be 10–25%, with the smallest biases in phase associated with the analysis of ΔtCO2. We report our analysis from Barrow, Alaska (BRW) during 1973–2013, which is representative of the broader Arctic region. We determine an amplitude trend of 0.09 ± 0.02 ppm yr−1, which is consistent with previous work. Using ΔtCO2 we determine estimates for the timing of the onset of net uptake and release of CO2 of −0.14 ± 0.14 and −0.25 ± 0.08 days yr−1, respectively, and a corresponding uptake period of −0.11 ± 0.16 days yr−1, which are significantly different to previously reported estimates. We find that the wavelet transform method has significant skill in characterizing changes in the peak uptake and release. We find a trend of 0.65 ± 0.34% (p< 0.01) and 0.42 ± 0.34% (p<0.05) for rates of peak uptake and release, respectively. Our analysis does not provide direct evidence about the balance between uptake and release of carbon, but changes in the peak uptake and release together with an invariant growing period length provides indirect evidence that high northern latitude ecosystems are progressively taking up more carbon.

Summary
Analysis of CO2 mole fraction data: first evidence of large-scale changes in CO2 uptake at high northern latitudes

Excerpt
Bacastow, R. B., Keeling, C. D., and Whorf, T. P.: Seasonal amplitude increase in atmospheric CO2 concentration at Mauna Loa, Hawaii, 1959–1982, J. Geophys. Res., 90, 10529–10540, doi:10.1029/JD090iD06p10529, 1985.; Ballantyne, A. P., Alden, C. B., Miller, J. B., Tans, P. P., and White, J. W. C.: Increase in observed net carbon dioxide uptake by land and oceans during the past 50 years, Nature, 488, 70–72, 2012.; Barichivich, J., Briffa, K. R., Osborn, T. J., Melvin, T. M., and Caesar, J.: Thermal growing season and timing of biospheric carbon uptake across the Northern Hemisphere, Global Biogeochem. Cy., 26, GB4015, doi:10.1029/2012GB004312, 2012.; Barichivich, J., Briffa, K. R., Myneni, R. B., Osborn, T. J., Melvin, T. M., Ciais, P., Piao, L., and Tucker, C.: Large-scale variations in the vegetation growing season and annual cycle of atmospheric CO2 at high northern latitudes from 1950 to 2011, Glob. Change Biol., 19, 3167–3183, 2013.; Cong, N., Wang, T., Nan, H., Ma, Y., Wang, X., Myneni, R. B., and Piao, S.: Changes in satellite-derived spring vegetation green-up date and its linkage to climate in China from 1982 to 2010: a multimethod analysis, Glob. Change Biol., 19, 881–891, 2013.; Dlugokencky, E., Lang, P. M., Crotwell, A. M., Masarie, K. A., and Crotwell, M. J.: Atmospheric Methane Dry Air Mole Fractions from the NOAA ESRL Carbon Cycle Cooperative Global Air Sampling Network, 1983–2013, Tech. rep., NOAA, 2014.; Gloor, M., Sarmiento, J. L., and Gruber, N.: What can be learned about carbon cycle climate feedbacks from the CO2 airborne fraction?, Atmos. Chem. Phys., 10, 7739–7751, doi:10.5194/acp-10-7739-2010, 2010.; Gong, D.-Y. and Shi, P.-J.: Northern hemispheric NDVI variations associated with large-scale climate indices in spring, Int. J. Remote Sens., 24, 2559–2566, 2003.; Graven, H. D., Keeling, R. F., Piper, S. C., Patra, P. K., Stephens, B. B., Wofsy, S. C., Welp, L. R., Sweeney, C., Tans, P. P., Kelley, J. J., Daube, B. C., Kort, E. A., Santoni, G. W., and Bent, J. D.: Enhanced seasonal exchange of CO2 by northern ecosystems since 1960, Science, 341, 1085–1089, 2013.; Harris, I., Jones, P. D., Osborn, T. J., and Lister, D. H.: Updated high-resolution grids of monthly climatic observations – the CRU TS3.10 dataset, Int. J. Climatol., doi:10.1002/joc.3711, 2013.; Kaufmann, R. K., Paletta, L. F., Tian, H. Q., Myneni, R. B., and D'Arrigo, R. D.: The power of monitoring stations and a CO2 fertilization effect: evidence from causal relationships between NDVI and carbon dioxide, Earth Interact., 12, 1–23, doi:10.1175/2007EI240.1, 2008.; Torrence, C. and Compo, G. P.: A practical guide to wavelet analysis, B. Am. Meteorol. Soc., 79, 61–78, 1998.; Keeling, C. D., Chin, J. F. S., and Whorf, T. P.: Increased activity of northern vegetation inferred from atmospheric CO2 measurements, Nature, 382, 146–149, 1996.; Lim, C., Kafatos, M., and Megonigal, P.: Correlation between atmospheric CO2 concentration and vegetation greenness in North America: CO2 fertilization effect, Clim. Res., 28, 11–22, 2004.; Linderholm, H. W.: Growing season changes in the last century, Agr. Forest Meteorol., 137, 1–14, 2006.; Los, S. O.: Analysis of trends in fused AVHRR and MODIS NDVI data for 1982-2006: indication for a CO2 fertilization effect in global vegetation, Global Biogeochem. Cy., 27, 1–13, 2013.; Mao, J., Shi, X., Thornton, P. E., Piao, S., and Wang, X.: Causes of spring vegetation growth trends in the northern mid-high la

 

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