Abstract
The carbon cycle is central to the Earth System, being inextricably coupled with climate, the water cycle, the nutrient cycles, and the production of bio-mass by photosynthesis on land and in the oceans. Over the past century, the Earth’s carbon cycle experienced large perturbations. Since the beginning of the industrial revolution, the mean global carbon dioxide (C02) concentra-ion has risen from about 280 ppm to over 368 ppm (Conway et al. 1994; Keeling and Whorf 2002). The worldwide rise in atmospheric C02 concentration is occurring due to an imbalance between the rate at which anthropogenic and natural sources emit C02 (by burning fossil fuel and respiring) and the rate at which biospheric and oceanic sinks remove C02 from the atmosphere by photosynthesis and physio chemical processes. Superimposed on the overall trend regarding C02 is a record of great interannual variability of sources and sinks in the rate of growth of atmospheric C02. Typical values are on the order of 0.5 to 3 ppm year-1. On a mass basis, these values correspond to 1 and 5 Gt C year-1, respectively. Potential sources of year-to-year changes in C02 remain a hot topic of debate. Such variation has been attributed to El Niño/La Nina events, which cause regions of droughts or excessive rainfall (Conway et al. 1994; Keeling et al. 1995), and alterations in the timing and length of the growing season (Myneni et al. 1997; Randerson et al. 1997).
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
Similar content being viewed by others
References
Amiro BD, MacPherson JI, Desjardins RL (1999) BOREAS flight measurements of forest-fire effects on carbon dioxide and energy fluxes. Agric For Meteor 96:199–208
Aubinet M, Grelle A, Ibrom A, Rannik U, Moncrieff J, Foken T, Kowalski A, Martin P, Berbigier P, Bernhofer C, Clement R, Elbers J, Granier A, Grunwald T, Morgenstern K, Pilegaard K, Rebmann C, Snijders W, Valentini R, Vesala T (2000) Estimates of the annual net carbon and water exchange of European forests: the EUROFLUX methodology. Adv Ecol Res 30:113–175
Baldocchi DD, Valentini R, Running SR, Oechel W, Dahlman R (1996) Strategies for measuring and modeling C02 and water vapor fluxes over terrestrial ecosystems. Global Change Biol 2:159–168
Baldocchi DD, Falge E, Gu L, Olson R, Hollinger D, Running S, Anthoni P, Bernhofer C, Davis K, Fuentes J, Goldstein A, Katul G, Law B, Lee X, Mahli Y, Meyers T, Munger W, Oechel W, Paw UK, Pilegaard K, Schmid H, Valentini R, Verma S, Vesala T, Wilson K, Wofsy S (2001) FLUXNET: a new tool to study the temporal and spatial variability of ecosystem-scale carbon dioxide, water vapor and energy flux densities. Bull Am Meteor Soc 82:2415–2435
Baumgartner A (1969) Meteorological approach to the exchange of C02 between atmosphere and vegetation, particularly forests stands. Photosynthetica 3:127–149
Conway TJ, Tans PP, Waterman LS, Thoning KW, Kitzis DR, Masarie K, Zhang N (1994) Evidence for interannual variability of the carbon cycle from NOAA/CMDL global sampling network. J Geophys Res 99:22831–22855
Denmead OT (1964) Evaporation sources and apparent diffusivities in a forest canopy. J Appl Meteorol 3:393–389
Denmead OT (1969) Comparative micrometeorology of a wheat field and a forest of Pinus radiata. Agric Fore Meteor 6:357–371
Goulden ML, Wofsy SC, Harden JW, Trumbore SE, Crill PM, Gower ST, Fires T, Daube BC, Fan SM, Sutton DJ, Bazzaz A, Munger JW (1998) Sensitivity of boreal forest carbon balance to soil thaw. Science 279:214–217
Gower ST, Kucharik CJ, Norman JM (1999) Direct and indirect estimation of leaf area index, fpar and net primary production of terrestrial ecosystems. Remote Sensing Environ 70:29–51
Inoue I (1958) An aerodynamic measurement of photosynthesis over a paddy field. Proceedings of the 7th Japan National Congress of Applied Mechanics, pp 211–214
Jarvis PG, James GB, Landsberg JJ (1976) Coniferous forest. In: Monteith JL (ed) Vegetation and the atmosphere, vol 2. Academic Press, London, pp 171–240
Kauppi PE, Mielikainen K, Kuuseia K (1992) Biomass and carbon budget of European forests, 1971 to 1990. Science 256:70–74
Keeling CD, Whorf TP (1994) Atmospheric C02 records from sites in the SIO air sampling network. In: Trends ’93: a compendium of data on global change. ORNL/CDIAC-65, Oak Ridge, TN, pp 16–26
Keeling CD, Whorf TP (2002) Atmospheric C02 records from sites in the SIO air sampling network. In: Trends: a compendium of data on global change. Carbon dioxide Information Analysis Center, Oak Ridge, TN, USA
Keeling CD, Whorf TP, Wahlen M, v d Plicht J (1995) Interannual extremes in the rate of rise of atmospheric carbon dioxide since 1980. Nature 375:666–670
Lemon ER (1960) Photosynthesis under field conditions. II. An aerodynamic method for determining the turbulent carbon dioxide exchange between the atmosphere and a corn field. Agric J 52:697–703
Lindroth A, Grelle A, Morén AS (1998) Long-term measurements of boreal forest carbon balance reveal large temperature sensitivity. Global Change Biol $:443–450
Monteith JL, Szeicz G (1960) The C02 flux over a field of sugar beets. Q J R Meteorol Soc 86:205–214
Myneni RB, Keeling CD, Tucker CJ, Asrar G, Nemani RR (1997) Increased plant growth in the northern high latitudes from 1981–1991. Nature 386:698–702
Oechel WC, Vourlitis GL, Hastings SJ, Zulueta RC, Hinzman L, Kane D (2000) Acclimation of ecosystem C02 exchange in the Alaskan Arctic in response to decadal climate warming. Nature 406:978–981
Papale D, Valentini R (2002) Spatial and temporal assessment of biospheric carbon fluxes at continental scale by neural network optimization. In: Mencuccini M, Grace J, Moncrieffs Mc Naughton J (eds) Forest at land-atmosphere interface. A festschrift for Paul Jarvis. CAB Int, Wallingford, UK
Pielke RA, Avissar R, Raupach M, Dolman AJ, Zeng X, Denning AS (1998) Interactions between the atmosphere and terrestrial ecosystems: influence on weather and climate. Global Change Biol 4:61–476
Randerson JT, Thompson MV, Conway TJ, Fung IY, Field CB (1997) The contribution of terrestrial sources and sinks to trends in the seasonal cycle of atmospheric carbon dioxide. Global Biogeochem Cycles 11:535–560
Schulze ED (2000) Carbon and nitrogen cycling in European forest ecosystems. Ecological studies. Springer, Berlin Heidelberg New York, 499 pp
Schulze ED, Lloyd J, Kelliher FM, Wirth C, Rebmann C, Lukher B, Mund M, Milykova I, Schulze W, Ziegler W, Varlagin A, Valentini R, Dore S, Grigoriev S, Kolle O, Vygodskaya NN (1999) Productivity of forests in the Eurosiberian boreal region and their potential to act as a carbon sink. Global Change Biol 5:703–722
Schulze ED, Valentini R, Sanz MJ (2002) The long way from Kyoto to Marrakesh: implications of the Kyoto Protocol negotiations for global ecology. Global Change Biol 8:1–14
Valentini R, Scarascia Mugnozza G, De Angelis P, Bimbi R (1991) An experimental test of the eddy correlation technique over a Mediterranean macchia canopy. Plant Cell Environ 14:987–994
Valentini, R, Matteucci G, Dolman AJ, Schulze E-D, Rebmann C, Moors EJ, Granier A, Gross P, Jensen NO, Pilegaard K, Lindroth A, Grelle A, Bernhofer C, Grünwald T, Aubinet M, Ceulemans R, Kowalski AS, Vesala T, Rannik Ü, Berbigier P, Loustau D, Gudmundsson J, Thorgeirsson H, Ibrom A, Morgenstern K, Clement R, Moncrieff J, Montagnani L, Minerbi S, Jarvis PG (2000) Respiration as the main determinant of European forests carbon balance. Nature 404:861–865
Verma SB, Baldocchi DD, Anderson DE, Matt DR, Clement RE (1986) Eddy fluxes of C02, water vapor, and sensible heat over a deciduous forest. Bound Layer Meteor 36:71–91
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2003 Springer-Verlag Berlin Heidelberg
About this chapter
Cite this chapter
Valentini, R., Matteucci, G., Dolman, A.J., Schulze, ED. (2003). Conclusions: The Role of Canopy Flux Measurements in Global C-Cycle Research. In: Valentini, R. (eds) Fluxes of Carbon, Water and Energy of European Forests. Ecological Studies, vol 163. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-05171-9_13
Download citation
DOI: https://doi.org/10.1007/978-3-662-05171-9_13
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-07848-4
Online ISBN: 978-3-662-05171-9
eBook Packages: Springer Book Archive