Changes in surface solar radiation in Northeastern Spain over the past six centuries recorded by tree-ring δ13C
Although solar radiation at the surface plays a determinant role in carbon discrimination in tree rings, stable carbon isotope chronologies (δ13C) have often been interpreted as a temperature proxy due to the co-variability of temperature and surface solar radiation. Furthermore, even when surface solar radiation is assumed to be the main driver of 13C discrimination in tree rings, δ13C records have been calibrated against sunshine duration or cloud cover series for which longer observational records exists. In this study, we use different instrumental and satellite data over northeast Spain (southern Europe) to identify the main driver of tree-ring 13C discrimination in this region. Special attention is paid to periods in which the co-variability of those climate variables may have been weaker, such as years after large volcanic eruptions. The analysis identified surface solar radiation as the main driver of tree-ring δ13C changes in this region, although the influence of other climatic factors may not be negligible. Accordingly, we suggest that a reconstruction of SSR over the last 600 years is possible. The relation between multidecadal variations of an independent temperature reconstruction and surface solar radiation in this region shows no clear sign, and warmer (colder) periods may be accompanied by both higher and lower surface solar radiation. However, our reconstructed records of surface solar radiation reveals a sunnier Little Ice Age in agreement with other δ13C tree-ring series used to reconstruct sunshine duration in central and northern Europe.
KeywordsTree rings Stable carbon isotopes Surface solar radiation Dendroclimatology Volcanic eruptions Pyrenees
The research was funded by the EU-project MILLENNIUM (017008-2), EU-project ISONET (Contract EV K2 = 2001-00237). ASL was supported by a postdoctoral fellowship JCI-2012-12508 and the projects CGL2014-55976-R and CGL2014-52135-C3-01-R from the Spanish Ministry of Economy and Competitiveness. EZ contribution is part of the Cluster of Excellence CLISAP funded by the German Science Foundation. The authors would like to thank the two anonymous reviewers for their constructive comments. Data from this paper is available and can be accessed through the corresponding author.
- Boettger T, Haupt M, Knöller K, Weise SM, Waterhouse JS, Rinne KT, Loader NJ, Sonninen E, Jungner H, Masson-Delmotte V, Stievenard M, Guillemin M-T, Pierre M, Pazdur A, Leuenberger M, Filot M, Saurer M, Reynolds CE, Helle G, Schleser GH (2007) Wood cellulose preparation methods and mass spectrometric analyses of δ13C, δ18O and non-exchangeable δ2H values in cellulose, sugar and starch: an inter-laboratory comparison. Anal Chem 79:4603–4612. doi: 10.1021/ac0700023
- Boucher O, Randall D, Artaxo P, Bretherton C, Feingold G, Forster P, Kerminen VM, Kondo Y, Liao H, Lohmann U, Rasch P, Satheesh SK, Sherwood S, Stevens B, Zhang XY (2013) Clouds and aerosols. In: Stocker TF, Qin D, Plattner G-K, Tignor M, Allen SK, Doschung J, Nauels A, Xia Y, Bex V, Midgley PM (eds) Climate change 2013: the physical science basis. Contribution of working group I to the fifth assessment report of the intergovernmental panel on climate change. Cambridge University Press, pp 571–657. doi: 10.1017/CBO9781107415324.016
- Dorado Liñán I, Büntgen U, González-Rouco F, Zorita E, Montávez JP, Gómez-Navarro JJ, Brunet M, Heinrich I, Helle G, Gutiérrez E (2012) Estimating 750 years of temperature variations and uncertainties in the Pyrenees by tree-ring reconstructions and climate simulations. Clim Past 8(3):919–933CrossRefGoogle Scholar
- Flato G, Marotzke J, Abiodun B, Braconnot P, Chou SC, Collins W, Cox P, Driouech F, Emori S, Eyring V., Forest C, Gleckler P, Guilyardi E, Jakob C, Kattsov V, Reason C, Rummukainen M (2013) Evaluation of climate models. In: Stocker TF, Qin D, Plattner G-K, Tignor M, Allen SK, Boschung J, Nauels A, Xia Y, Bex V, Midgley PM (eds) Climate change 2013: the physical science basis. Contribution of working group I to the fifth assessment report of the intergovernmental panel on climate change. Cambridge University Press, CambridgeGoogle Scholar
- Holmes RL (1983) Computer-assisted quality control in tree-ring dating and measurement. Tree-Ring Bull 43:69–78Google Scholar
- Miller GH, Geirsdóttir A, Zhong Y, Larsen DJ, Otto-Bliesner BL, Holland MM, Bailey DA, Refsnider KA, Lehman SJ, Southon JR, Anderson C, Björnsson H, Thordarson T (2012) Abrupt onset of the Little Ice Age triggered by volcanism and sustained by sea-ice/ocean feedbacks. Geophys Res Lett 39:L02708. doi: 10.1029/2011GL050168 CrossRefGoogle Scholar
- Ogle N, Turney CSM, Kalin RM, O’Donnell L, Butler CJ (2005) Palaeovolcanic forcing of short‐term dendroisotopic depletion: the effect of decreased solar intensity on Irish oak. Geophys Res Lett 32. doi: 10.1029/2004GL021623. ISSN: 0094-8276
- Panofsky HA, Brier GW (1958) Some applications of statistics to meteorology. Penn State University Press, University ParkGoogle Scholar
- Planells O, Andreu L, Bosch O, Gutiérrez E, Filot M, Leuenberger M, Helle G, Schleser GH (2006) The potential of stable isotopes to record aridity conditions in a forest with low-sensitive ring widths from eastern Pre-Pyrenees. In: Heinrich I, Gärtner H, Monbaron M, Schleser G (eds) (2006) TRACE—Tree Rings Archaeol Climatol Ecol 4:266–272Google Scholar
- Stokes MA, Smiley TL (1968) Introduction to tree-ring dating. University of Chicago Press, ChicagoGoogle Scholar
- van den Besselaar EJM, Sanchez-Lorenzo A, Wild M, Klein Tank AMG, de Laat ATJ (2015) Relationship between sunshine duration and temperature trends across Europe since the second half of the 20th century. J Geophys Res Atmos 120. doi: 10.1002/2015JD023640
- Young G, McCarroll D, Loader N, Gagen M, Kirchhefer A, Demmler J (2012) Changes in atmospheric circulation and the Arctic Oscillation preserved within a millennial length reconstruction of summer cloud cover from northern Fennoscandia. Clim Dyn 39(1–2):495–507. doi: 10.1007/s00382-011-1246-3 CrossRefGoogle Scholar