Climate of the Past www.clim-past.net 1814-9324 1814-9332 5 4 2009 10.5194/cp-5-667-2009 http://www.clim-past.net/5/667/2009/ http://www.clim-past.net/5/667/2009/cp-5-667-2009.html http://www.clim-past.net/5/667/2009/cp-5-667-2009.pdf 667 682 2009-11-03 Stable isotope records for the last 10 000 years from Okshola cave (Fauske, northern Norway) and regional comparisons H. Linge henriette.linge@geo.uib.no S.-E. Lauritzen C. Andersson J. K. Hansen R. Ø. Skoglund H. S. Sundqvist Department of Earth Science, University of Bergen, Allégaten 41, 5007 Bergen, Norway Bjerknes Centre for Climate Research, Allégaten 55, 5007 Bergen, Norway Department of Physical Geography and Quaternary Geology, Stockholm University, 10691 Stockholm, Sweden Bert Bolin Centre for Climate Research, Stockholm University, 10691 Stockholm, Sweden Department of Plant and Environmental Sciences, Norwegian University of Life Sciences, 1432 Ås, Norway The sensitivity of terrestrial environments to past changes in heat transport is expected to be manifested in Holocene climate proxy records on millennial to seasonal timescales. Stalagmite formation in the Okshola cave near Fauske (northern Norway) began at about 10.4 ka, soon after the valley was deglaciated. Past monitoring of the cave and surface has revealed stable modern conditions with uniform drip rates, relative humidity and temperature. Stable isotope records from two stalagmites provide time-series spanning from c. 10 380 yr to AD 1997; a banded, multi-coloured stalagmite (Oks82) was formed between 10 380 yr and 5050 yr, whereas a pristine, white stalagmite (FM3) covers the period from ~7500 yr to the present. The stable oxygen isotope (&delta;¹⁸O_c), stable carbon isotope (&delta;¹³C_c), and growth rate records are interpreted as showing i) a negative correlation between cave/surface temperature and &delta;¹⁸O_c, ii) a positive correlation between wetness and &delta;¹³C_c, and iii) a positive correlation between temperature and growth rate. Following this, the data from Okshola show that the Holocene was characterised by high-variability climate in the early part, low-variability climate in the middle part, and high-variability climate and shifts between two distinct modes in the late part. <br><br> A total of nine Scandinavian stalagmite &delta;¹⁸O_c records of comparable dating precision are now available for parts or most of the Holocene. None of them show a clear Holocene thermal optimum, suggesting that they are influenced by annual mean temperature (cave temperature) rather than seasonal temperature. For the last 1000 years, &delta;¹⁸O_c values display a depletion-enrichment-depletion pattern commonly interpreted as reflecting the conventional view on climate development for the last millennium. Although the &delta;¹⁸O_c records show similar patterns and amplitudes of change, the main challenges for utilising high-latitude stalagmites as palaeoclimate archives are i) the accuracy of the age models, ii) the ambiguity of the proxy signals, and iii) calibration with monitoring data. Andersen, B. G.: Glacial geology of Northern Nordland, North Norway, Norg. Geol. Unders. B., 320, 1–74, 1975. Andersen, B. G., Bøen, F., Nydal, R., Rasmussen, A., and Vallevik, P. N.: Radiocarbon dates of marginal moraines in Nordland, North Norway, Geogr. Ann. A, 63, 155–160, 1981. Andersson, C., Risebrobakken, B., Jansen, E., and Dahl, S. O.: Late Holocene surface ocean conditions of the Norwegian Sea (Vøring Plateau), Paleoceanography, 18, 1044, doi:10.1029/2001PA000654, 2003. Atkinson, T. C.: Growth mechanisms of speleothems in Castleguard Cave, Columbia Icefields, Alberta, Canada, Arctic Alpine Res., 15, 523–536, 1983. Aune, B.: Kartblad &aring;rstider og vekstsesong (Map "Seasons of the year and growth season") 1:7 mill in: Nasjonalatlas for Norge, Tema 3.2 Klima (National Atlas of Norway, Theme 3.2 Climate), edited by: Statens kartverk, 64, 1993. Baker, A., Smart, P. L., Edwards, R. L., and Richards, D. A.: Annual growth banding in a cave stalagmite, Nature, 364, 518–520, 1993. Baker, A., Genty, D., Dreybrodt, W., Barnes, W. L., Mockler, N. J., and Grapes, J.: Testing theoretically predicted stalagmite growth rate with recent annually laminated samples: implications for past stalagmite deposition, Geochim. Cosmochim. Ac., 62, 393–404, 1998. Baldini, J. U. L., McDermott, F., Baker, A., Baldini, L. M., Mattey, D. P., and Railsback, L. B.: Biomass effects on stalagmite growth rate and isotope ratios: A 20th century analogue from Wiltshire, England, Earth Planet. Sc. Lett., 240, 486–494, 2005. Baldini, J. U. L., Baldini, L. M., McDermott, F., and Clipson, N.: Carbon dioxide sources, sinks, and spatial variability in shallow temperate zone caves: evidence from Ballynamintra Cave, Ireland, J. Cave. Karst. Stud., 68, 4–11, 2006. Baldini, J. U. L., McDermott, F., Hoffmann, D. L., Richards, D. A., and Clipson, N.: Very high-frequency and seasonal cave atmosphere P$_\rm CO_2$ variability: Implications for stalagmite growth and oxygen isotope-based paleoclimate records, Earth Planet. Sc. Lett., 272, 118–129, 2008. Beer, J. and van Geel, B.: Holocene climate change and the evidence for solar and other forcings, in: Natural climate variability and global warming – A Holocene perspective, edited by: Battarbee, R. W. and Binney, H. A., Wiley-Blackwell, 138–162, 2008. Berstad, I.: Uranseriedatering og stabilisotopanalyse av speleothemer fra Søylegrotta, Mo i Rana, Cand. scient. thesis, University of Bergen, Bergen, 122~pp., 1998. Bradley, R. S. and Jones, P. D.: "Little Ice Age" summer temperature variations: their nature and relevance to recent global warming trends, Holocene, 3, 367–376, 1993. Broecker, W. S.: Was the Medieval Warm Period global?, Science, 291, 1497–1499, 2001. Calvo, E., Grimalt, J., and Jansen, E.: High resolution U$^K_37$ sea surface temperature reconstruction in the Norwegian Sea during the Holocene, Quaternary Sci. Rev., 21, 1385–1394, 2002. Cerling, T. E., Solomon, D. K., Quade, J., and Bowman, J. R.: On the isotopic composition of carbon in soil carbon dioxide, Geochim. Cosmochim. Ac., 55, 3403–3405, 1991. Crowley, T. J. and Lowery, T. S.: How warm was the Medieval Warm Period?, Ambio, 29, 51–54, 2000. Crucifix, M.: Modelling the climate of the Holocene, in: Global warming and natural climate variability - a Holocene perspective, edited by: Battarbee, R. W. and Binney, H. A., Wiley-Blackwell, 98–122, 2008. Drange, H., Dokken, T., Furevik, T., Gerdes, R., and Berger, W.: The Nordic Seas. An integrated perspective. Oceanography, Climatology, Biogeochemistry, and Modeling, American Geophysical Union, Washington DC, 366~pp., 2005. Dreybrodt, W.: Chemical kinetics, speleothem growth and climate, Boreas, 28, 347–356, 1999. Dyer, J. M. and Brook, G. A.: Spatial and temporal variations in temperate forest soil carbon dioxide during the non-growing season, Earth Surf. Processes, 16, 411–426, 1991. Einevoll, S. and Lauritzen, S.-E.: Calibration of stable isotope and temperature signal in the percolation zone of a sub-arctic cave, Northern Norway, Cave and Karst Science, 21, p 9, 1994. Fairchild, I. J., Smith, C. L., Baker, A., Fuller, L., Spötl, C., Mattey, D., McDermott, F., and E. I. M. F.: Modification and preservation of environmental signals in speleothems, Earth-Sci. Rev., 75, 105–153, 2006. Fantidis, J. and Ehhalt, D. H.: Variations in the carbon and oxygen isotopic composition in stalamites and stalactites: evidence of non-equilibrium isotopic fractionation, Earth Planet. Sc. Lett., 10, 136–144, 1970. Gascoyne, M.: Palaeoclimate determination from cave calcite deposits, Quaternary Sci. Rev., 11, 609–632, 1992. Genty, D. and Quinif, Y.: Annually laminated sequences in the internal structure of some Belgian stalagmites – importance for paleoclimatology, J. Sediment. Res., 66, 275–288, 1996. Genty, D., Baker, A., and Vokal, B.: Intra- and inter-annual growth rate of modern stalagmites, Chem. Geol., 176, 191–212, 2001. Goldstein, S. J. and Stirling, C. H.: Techniques for measuring uranium-series nuclides: 1992–2002, Rev. Mineral. Geochem., 52, 23–57, 2003. Hamada, Y. and Tanaka, T.: Dynamics of carbon dioxide in soil profiles based on long-term field observations, Hydrol. Process., 15, 1829–1845, 2001. Hammarlund, D. and Edwards, T. W. D.: Stable isotope variations in stalagmites from northwestern Sweden document changes in temperature and vegetation during the early Holocene: a comment on Sundqvist et al 2007a, Holocene, 18, 1007–1008, 2008. Hansen, J. K.: Mikroklimatologi i to karsthuler i Rana og Fauske: m&aring;leserier med henblikk p&aring; paleoklimatologisk kalibrering, MS thesis, University of Bergen, Bergen, 135~pp., 2001. Hellstrom, J.: U-Th dating of speleothems with high initial $^230$Th using stratigraphical constraint, Quat. Geochonol., 1, 289–295, 2006. Hendy, C. H.: The isotopic geochemistry of speleothems &minus;1. The calculation of the effects of different modes of formation on the isotopic composition of speleothems and their applicability as palaeoclimatic indicators, Geochim. Cosmochim. Ac., 35, 801–824, 1971. Hesterberg, R. and Siegenthaler, U.: Production and stable isotopic composition of CO₂ in a soil near Bern, Switzerland, Tellus, 43B, 197–205, 1991. Hurrell, J. W., Kushnir, Y., Ottersen, G., and Visbeck, M.: An overview of the North Atlantic Oscillation, Geoph. Monog. Series, 134, 1–35, 2003. Ivanovich, M. and Harmon, R. S.: Uranium-series disequilibrium: applications to earth, marine, and environmental sciences, Clarendon Press, Oxford, 910~pp., 1992. Kaufmann, G. and Dreybrodt, W.: Stalagmite growth and palaeo-climate: an inverse approach, Earth Planet. Sc. Lett., 224, 529–545, 2004. Kiefer, R. H.: Soil carbon dioxide concentrations and climate in a humid subtropical environment, Prof. Geogr., 42, 182–194, 1990. Lachniet, M. S.: Climatic and environmental controls on speleothem oxygen-isotope values, Quaternary Sci. Rev., 5–6, 412–432, 2009. Lauritzen, S.-E., Løvlie, R., Moe, D., and Østbye, E.: Paleoclimate deduced from a multidisciplinary study of a half-million-year-old stalagmite from Rana, Northern Norway, Quaternary Res., 34, 306–316, 1990. Lauritzen, S.-E.: Uranium series dating of speleothems: a glacial chronology for Nordland; Norway, for the last 600 ka, Striae, 34, 127–133, 1991. Lauritzen, S.-E.: High-resolution paleotemperature proxy record for the Last Interglaciation based on Norwegian speleothems, Quaternary Res., 43, 133–146, 1995. Lauritzen, S.-E.: Karst landforms and caves of Nordland, North Norway, Guide for excursion 2 – Climate change; the karst record, Department of geology, University of Bergen, 1996. Lauritzen, S.-E. and Lundberg, J.: Calibration of the speleothem delta function: an absolute temperature record for the Holocene in northern Norway, Holocene, 9, 659–669, 1999. Lauritzen, S.-E.: Reconstructing Holocene climate records from speleothems, in: Global Change in the Holocene, edited by: Mackay, A., Battarbee, R., Birks, J. and Oldfield, F., Hodder Arnold, London, 242–263, 2003. Linge, H.: Isotopic studies of some northern Norwegian speleothems and calcareous algae from Svalbard, Ph.D. thesis, University of Bergen, Bergen, 83~pp., 1999. Linge, H., Lauritzen, S.-E., Lundberg, J., and Berstad, I. M.: Stable isotope stratigraphy of Holocene speleothems: examples from a cave system in Rana, northern Norway, Palaeogeogr. Palaeocl., 167, 209–224, 2001. Linge, H., Baker, A., Dahl, C. A., and Lauritzen, S.-E.: Variability in luminescent lamination and initial $^230$Th/$^232$Th activity ratios in a late Holocene stalagmite from northern Norway, Quat. Geochronol., 4, 181–192, 2009. Mangini, A., Spötl, C., and Verdes, P.: Reconstruction of temperature in the Central Alps during the past 2000 yr from a d$^18$O stalagmite record, Earth Planet. Sc. Lett., 235, 741–751, 2005. Mann, M. E., Bradley, R. S., and Hughes, M. K.: Global-scale temperature patterns and climate forcing over the past six centuries, Nature, 392, 779–787, 1998. McDermott, F.: Palaeo-climate reconstruction from stable isotope variations in speleothems: a review, Quaternary Sci. Rev., 23, 901–918, 2004. Mickler, P. J., Stern, L. A., and Banner, J. L.: Large kinetic isotope effects in modern speleothems, Geol. Soc. Am. Bull., 118, 65–81, 2006. Nesje, A. and Dahl, S.-O.: The "Little Ice Age" – only temperature?, Holocene, 13, 139–145, 2003. Nesje, A.: Latest Pleistocene and Holocene alpine glacier fluctuations in Scandinavia, Quaternary Sci. Rev., 28, 2119–2136, 2009. O'Neil, J. R., Clayton, R. N., and Mayeda, T. K.: Oxygen isotope fractionation in divalent metal carbonates, J. Chem. Phys., 51, 5547–5558, 1969. Richards, D. A. and Dorale, J. A.: Uranium-series chronology and environmental applications of speleothems, Rev. Mineral. Geochem., 52, 407–460, 2003. Rightmire, C. T.: Seasonal variation in P$_\rm CO_2$ and $^13$C content of soil atmosphere, Water Resour. Res., 14, 691–692, 1978. Risebrobakken, B., Jansen, E., Andersson, C., Mjelde, E., and Hevrøy, K.: A high-resolution study of Holocene paleoclimatic and paleoceanographic changes in the Nordic Seas, Paleoceanography, 18(1), 1017, doi:10.1029/2002PA000764, 2003. Rozanski, K., Araguás-Araguás, L., and Gonfiantini, R.: Isotopic patterns in modern global precipitation, Geoph. Monog. Series, 78, 1–36, 1993. Spötl, C. and Mangini, A.: Speleothems and paleoglaciers, Earth Planet. Sc. Lett., 254, 323–331, 2007. Sundqvist, H. S., Holmgren, K., and Lauritzen, S.-E.: Stable isotope variations in stalagmites from northwestern Sweden document climate and environmental changes during the early Holocene, Holocene, 17, 259–267, 2007a. Sundqvist, H. S., Seibert, J., and Holmgren, K.: Understanding conditions behind speleothem formation in Korallgrottan, northwestern Sweden, J. Hydrol., 347, 13–22, 2007b. Sundqvist, H. S., Holmgren, K., Moberg, A., Spötl, C., and Mangini, A.: Stable isotopes in a stalagmite NW Sweden document environmental changes over the past 4000 years, Boreas, doi: 10.1111/j.1502-3885.2009.00099.x, 2009. Tan, M., Baker, A., Genty, D., Smith, C., Esper, J., and Cai, B.: Applications of stalagmite laminae to paleoclimate reconstructions: Comparison with dendrochronology/climatology, Quaternary Sci. Rev., 25, 2103–2117, 2006. Trouet, V., Esper, J., Graham, N. E., Baker, A., Scourse, J. D., and Frank, D. C.: Persistent positive North Atlantic Oscillation mode dominated the Medieval Climate Anomaly, Science, 324, 78–80, 2009. Usdowski, E. and Hoefs, J.: Kinetic $^13$C/$^12$C and $^18$O/$^16$O effects upon dissolution and outgassing of CO₂ in the system CO₂-H₂O, Chem. Geol., 80, 109–118, 1990. van Calsteren, P. and Thomas, L.: Uranium-series dating applications in natural environmental science, Earth-Sci. Rev., 75, 155–175, 2006. Vollweiler, N., Scholz, D., Mühlinghaus, C., Mangini, A., and Spötl, C.: A precisely dated climate record for the last 9 k yr for three high alpine stalagmites, Spannagel Cave, Austria, Geophys. Res. Lett., 33, L20703, doi:10.1029/2006GL027662, 2006.