Synchronizing the Greenland ice core and radiocarbon timescales over the Holocene-Bayesian wiggle-matching of cosmogenic radionuclide records

Climate of the Past

Volumn 12, Issue 1, 2016, Pages 15-30

  Adolphi, F ^a   Muscheler, R ^a  

^a LUND UNIVERSITY   (Sweden)

Author keywords

[No Author keywords available]

Indexed keywords

CALIBRATION; CARBON CYCLE; CHRONOLOGY; COSMOGENIC RADIONUCLIDE; HOLOCENE; ICE CORE; PALEOCLIMATE; PRECISION; RADIOCARBON DATING; TIMESCALE; TRANSFER FUNCTION;

ARCTIC; GREENLAND;

EID: 84956639001     PISSN: 18149324     EISSN: 18149332     Source Type: Journal    
DOI: 10.5194/cp-12-15-2016     Document Type: Article

References (69)

1. Abbott, P. M., Davies, S. M.: Volcanism and the Greenland ice-cores: the tephra record, Earth-Sci. Rev., 115, 173-191, doi:10.1016/j.earscirev.2012.09.001, 2012.
2. Adolphi, F., Güttler, D., Wacker, L., Skog, G., Muscheler, R.: Intercomparison of 14C dating of wood samples at Lund University and ETH-Zurich AMS facilities: extraction, graphitization, and measurement, Radiocarbon, 55, 391-400, 2013.
3. Adolphi, F., Muscheler, R., Svensson, A., Aldahan, A., Possnert, G., Beer, J., Sjolte, J., Björck, S., Matthes, K., Thiéblemont, R.: Persistent link between solar activity and Greenland climate during the Last Glacial Maximum, Nat. Geosci., 7, 662-666, doi:10.1038/ngeo2225, 2014.
4. Alley, R. B., Finkel, R. C., Nishiizumi, K., Anandakrishnan, S., Shuman, C. A., Mershon, G., Zielinski, G. A., Mayewski, P. A.: Changes in Continental and Sea-Salt Atmospheric Loadings in Central Greenland during the Most Recent Deglaciation-Model-Based Estimates, J. Glaciol., 41, 503-514, 1995.
5. Andersen, K. K., Svensson, A., Johnsen, S. J., Rasmussen, S. O., Bigler, M., Röthlisberger, R., Ruth, U., Siggaard-Andersen, M.-L., Peder Steffensen, J., Dahl-Jensen, D.: The Greenland Ice Core Chronology 2005, 15-42ka. Part 1: constructing the time scale, Quaternary Sci. Rev., 25, 3246-3257, doi:10.1016/j.quascirev.2006.08.002, 2006.
6. Barbante, C., Kehrwald, N. M., Marianelli, P., Vinther, B. M., Steffensen, J. P., Cozzi, G., Hammer, C. U., Clausen, H. B., Siggaard-Andersen, M.-L.: Greenland ice core evidence of the 79 AD Vesuvius eruption, Clim. Past, 9, 1221-1232, doi:10.5194/cp-9-1221-2013, 2013.
7. Bard, E., Raisbeck, G. M., Yiou, F., Jouzel, J.: Solar modulation of cosmogenic nuclide production over the last millennium: comparison between 14C and 10Be records, Earth Planet. Sc. Lett., 150, 453-462, doi:10.1016/s0012-821x(97)00082-4, 1997.
8. Blockley, S. P. E., Lane, C. S., Hardiman, M., Rasmussen, S. O., Seierstad, I. K., Steffensen, J. P., Svensson, A., Lotter, A. F., Turney, C. S. M., Bronk Ramsey, C.: Synchronisation of palaeoenvironmental records over the last 60,000 years, and an extended INTIMATE event stratigraphy to 48,000 b2k, Quaternary Sci. Rev., 36, 2-10, doi:10.1016/j.quascirev.2011.09.017, 2012.
9. Blunier, T., Chappellaz, J., Schwander, J., Dällenbach, A., Stauffer, B., Stocker, T. F., Raynaud, D., Jouzel, J., Clausen, H. B., Hammer, C. U., Johnsen, S. J.: Asynchrony of Antarctic and greenland climate change during the last glacial period, Nature, 394, 739-743, doi:10.1038/29447, 1998.
10. Bronk Ramsey, C., van der Plicht, J., Weninger, B.: "Wiggle matching" radiocarbon dates, Radiocarbon, 43, 381-390, 2001.
11. Bronk Ramsey, C., Albert, P., Blockley, S., Hardiman, M., Lane, C., Macleod, A., Matthews, I. P., Muscheler, R., Palmer, A., Staff, R. A.: Integrating timescales with time-transfer functions: a practical approach for an INTIMATE database, Quaternary Sci. Rev., 106, 67-80, doi:10.1016/j.quascirev.2014.05.028, 2014.
12. Buizert, C., Adrian, B., Ahn, J., Albert, M., Alley, R. B., Baggenstos, D., Bauska, T. K., Bay, R. C., Bencivengo, B. B., Bentley, C. R., Brook, E. J., Chellman, N. J., Clow, G. D., Cole-Dai, J., Conway, H., Cravens, E., Cuffey, K. M., Dunbar, N. W., Edwards, J. S., Fegyveresi, J. M., Ferris, D. G., Fitzpatrick, J. J., Fudge, T. J., Gibson, C. J., Gkinis, V., Goetz, J. J., Gregory, S., Hargreaves, G. M., Iverson, N., Johnson, J. A., Jones, T. R., Kalk, M. L., Kippenhan, M. J., Koffman, B. G., Kreutz, K., Kuhl, T. W., Lebar, D. A., Lee, J. E., Marcott, S. A., Markle, B. R., Maselli, O. J., McConnell, J. R., McGwire, K. C., Mitchell, L. E., Mortensen, N. B., Neff, P. D., Nishiizumi, K., Nunn, R. M., Orsi, A. J., Pasteris, D. R., Pedro, J. B., Pettit, E. C., Price, P. B., Priscu, J. C., Rhodes, R. H., Rosen, J. L., Schauer, A. J., Schoenemann, S.W., Sendelbach, P. J., Severinghaus, J. P., Shturmakov, A. J., Sigl, M., Slawny, K. R., Souney, J. M., Sowers, T. A., Spencer, M. K., Steig, E. J., Taylor, K. C., Twickler, M. S., Vaughn, B. H., Voigt, D. E., Waddington, E. D., Welten, K. C., Wendricks, A. W., White, J. W. C., Winstrup, M., Wong, G. J., Woodruff, T. E.: Precise interpolar phasing of abrupt climate change during the last ice age, Nature, 520, 661-665, doi:10.1038/nature14401, 2015.
13. Cauquoin, A.: Use of 10Be to Predict Atmospheric 14C Variations during the Laschamp Excursion: High Sensitivity to Cosmogenic Isotope Production Calculations, Radiocarbon, 56, 67-82, doi:10.2458/56.16478, 2014.
14. Delaygue, G., Bard, E.: An Antarctic view of Beryllium-10 and solar activity for the past millennium, Clim. Dynam., 36, 2201-2218, doi:10.1007/s00382-010-0795-1, 2010.
15. Elsässer, C., Wagenbach, D., Levin, I., Stanzick, A., Christl, M., Wallner, A., Kipfstuhl, S., Seierstad, I. K., Wershofen, H., Dibb, J.: Simulating ice core 10Be on the glacial-interglacial timescale, Clim. Past, 11, 115-133, doi:10.5194/cp-11-115-2015, 2015.
16. Field, C. V., Schmidt, G. A., Koch, D., Salyk, C.: Modeling production and climate-related impacts on10Be concentration in ice cores, J. Geophys. Res., 111, D15107, doi:10.1029/2005jd006410, 2006.
17. Finkel, R. C., Nishiizumi, K.: Beryllium 10 concentrations in the Greenland Ice Sheet Project 2 ice core from 3-40 ka, J. Geophys. Res., 102, 26699, doi:10.1029/97jc01282, 1997.
18. Friedrich, M., Remmele, S., Kromer, B., Hofmann, J., Spurk, M., Kaiser, K. F., Orcel, C., Küppers, M.: The 12,460-year Hohenheim oak and pine tree-ring chronology from central Europe-a unique annual record for radiocarbon calibration and paleoenvironment reconstructions, Radiocarbon, 46, 1111-1122, 2004.
19. Friedrich, W. L., Kromer, B., Friedrich, M., Heinemeier, J., Pfeiffer, T., Talamo, S.: Santorini Eruption Radiocarbon Dated to 1627-1600 B.C, Science, 312, 548, doi:10.1126/science.1125087, 2006.
20. Grönvold, K., Óskarsson, N., Johnsen, S. J., Clausen, H. B., Hammer, C. U., Bond, G., Bard, E.: Ash layers from Iceland in the Greenland GRIP ice core correlated with oceanic and land sediments, Earth Planet. Sc. Lett., 135, 149-155, doi:10.1016/0012-821X(95)00145-3, 1995.
21. Güttler, D., Adolphi, F., Beer, J., Bleicher, N., Boswijk, G., Christl, M., Hogg, A., Palmer, J., Vockenhuber, C.,Wacker, L.,Wunder, J.: Rapid increase in cosmogenic 14C in AD 775 measured in New Zealand kauri trees indicates short-lived increase in 14C production spanning both hemispheres, Earth Planet. Sc. Lett., 411, 290-297, doi:10.1016/j.epsl.2014.11.048, 2015.
22. Hammer, C. U., Clausen, H. B., Friedrich, W. L., Tauber, H.: The Minoan eruption of Santorini in Greece dated to 1645 BC, Nature, 328, 517-519, 1987.
23. Hammer, C. U., Kurat, G., Hoppe, P., Grum,W., Clausen, H. B.: Thera eruption date 1645 BC confirmed by new ice core data, Proceedings of the SCIEM 2000-EuroConference Haindorf, May 2001, Haindorf, 87-93, 2003.
24. Heikkilä, U., Beer, J., Feichter, J.: Meridional transport and deposition of atmospheric 10Be, Atmos. Chem. Phys., 9, 515-527, doi:10.5194/acp-9-515-2009, 2009.
25. Heikkilä, U., Beer, J., Abreu, J. A., Steinhilber, F.: On the Atmospheric Transport and Deposition of the Cosmogenic Radionuclides (10Be): A Review, Space Sci. Rev., 176, 321-332, doi:10.1007/s11214-011-9838-0, 2011.
26. Heikkilä, U., Smith, A. M.: Production rate and climate influences on the variability of 10Be deposition simulated by ECHAM5-HAM: Globally, in Greenland, and in Antarctica, J. Geophys. Res.-Atmos., 118, 2506-2520, doi:10.1002/jgrd.50217, 2013.
27. Hogg, A. G., Turney, C. S., Palmer, J. G., Southon, J., Kromer, B., Ramsey, C. B., Boswijk, G., Fenwick, P., Noronha, A., Staff, R.: The New Zealand kauri (Agathis australis) research project: a radiocarbon dating intercomparison of Younger Dryas wood and implications for IntCal13, Radiocarbon, 55, 2035-2048, 2013.
28. Johnsen, S. J., Dahl-Jensen, D., Dansgaard, W., Gundestrup, N.: Greenland palaeotemperatures derived from GRIP bore hole temperature and ice core isotope profiles, Tellus B, 47, 624-629, doi:10.1034/j.1600-0889.47.issue5.9.x, 1995.
29. Köhler, P., Muscheler, R., Fischer, H.: A model-based interpretation of low-frequency changes in the carbon cycle during the last 120,000 years and its implications for the reconstruction of atmospheric 114C, Geochem. Geophy. Geosy., 7, Q11N06, doi:10.1029/2005GC001228, 2006.
30. Kovaltsov, G. A., Usoskin, I. G.: A new 3D numerical model of cosmogenic nuclide 10Be production in the atmosphere, Earth Planet. Sc. Lett., 291, 182-188, doi:10.1016/j.epsl.2010.01.011, 2010.
31. Kovaltsov, G. A., Mishev, A., Usoskin, I. G.: A new model of cosmogenic production of radiocarbon 14C in the atmosphere, Earth Planet. Sc. Lett., 337-338, 114-120, doi:10.1016/j.epsl.2012.05.036, 2012.
32. Lal, D., Peters, B.: Cosmic ray produced radioactivity on the earth, in: Kosmische Strahlung II/Cosmic Rays II, Springer, Berlin, Heidelberg, Germany, 551-612, 1967.
33. Lane, C. S., Brauer, A., Blockley, S. P. E., Dulski, P.: Volcanic ash reveals time-transgressive abrupt climate change during the Younger Dryas, Geology, 41, 1251-1254, doi:10.1130/g34867.1, 2013.
34. Lohne, ∅. S., Mangerud, J. A. N., Birks, H. H.: Precise 14C ages of the Vedde and Saksunarvatn ashes and the Younger Dryas boundaries from western Norway and their comparison with the Greenland Ice Core (GICC05) chronology, J. Quaternary Sci., 28, 490-500, doi:10.1002/jqs.2640, 2013.
35. Masarik, J., Beer, J.: Simulation of particle fluxes and cosmogenic nuclide production in the Earth's atmosphere, J. Geophys. Res.-Atmos., 104, 12099-12111, doi:10.1029/1998jd200091, 1999.
36. Masarik, J., Beer, J.: An updated simulation of particle fluxes and cosmogenic nuclide production in the Earth's atmosphere, J. Geophys. Res., 114, D11103, doi:10.1029/2008jd010557, 2009.
37. Mayewski, P. A., Meeker, L. D., Twickler, M. S., Whitlow, S., Yang, Q., Lyons, W. B., Prentice, M.: Major features and forcing of high-latitude northern hemisphere atmospheric circulation using a 110,000-year-long glaciochemical series, J. Geophys. Res., 102, 26345, doi:10.1029/96jc03365, 1997.
38. Mekhaldi, F., Muscheler, R., Adolphi, F., Aldahan, A., Beer, J., McConnell, J. R., Possnert, G., Sigl, M., Svensson, A., Synal, H.-A., Welten, K. C., Woodruff, T. E.: Multiradionuclide evidence for the solar origin of the cosmic-ray events of AD 774/5 and 993/4, Nature Communications, 6, 8611, doi:10.1038/ncomms9611, 2015.
39. Miyake, F., Nagaya, K., Masuda, K., Nakamura, T.: A signature of cosmic-ray increase in AD 774-775 from tree rings in Japan, Nature, 486, 240-242, doi:10.1038/nature11123, 2012.
40. Miyake, F., Masuda, K., Nakamura, T.: Another rapid event in the carbon-14 content of tree rings, Nature Communications, 4, 1748, doi:10.1038/ncomms2783, 2013.
41. Muscheler, R.: 14C and 10Be around 1650 cal BC, in: Time's up!: Dating the Minoan eruption of Santorini. Acts of the Minoan Eruption Chronology Workshop, Sandbjerg November 2007, edited by: Warburton, D. A., Monographs of the Danish Institute at Athens, 10, Danish Institute at Athens, Athens, 275-284, 2009.
42. Muscheler, R., Heikkilä, U.: Constraints on long-term changes in solar activity from the range of variability of cosmogenic radionuclide records, Astrophysics and Space Sciences Transactions, 7, 355-364, doi:10.5194/astra-7-355-2011, 2011.
43. Muscheler, R., Beer, J., Vonmoos, M.: Causes and timing of the 8200 yr BP event inferred from the comparison of the GRIP 10Be and the tree ring 114C record, Quaternary Sci. Rev., 23, 2101-2111, doi:10.1016/j.quascirev.2004.08.007, 2004a.
44. Muscheler, R., Beer, J., Wagner, G., Laj, C., Kissel, C., Raisbeck, G. M., Yiou, F., Kubik, P. W.: Changes in the carbon cycle during the last deglaciation as indicated by the comparison of 10Be and 14C records, Earth Planet. Sc. Lett., 219, 325-340, doi:10.1016/s0012-821x(03)00722-2, 2004b.
45. Muscheler, R., Joos, F., Beer, J., Müller, S. A., Vonmoos, M., Snowball, I.: Solar activity during the last 1000yr inferred from radionuclide records, Quaternary Sci. Rev., 26, 82-97, doi:10.1016/j.quascirev.2006.07.012, 2007.
46. Muscheler, R., Kromer, B., Björck, S., Svensson, A., Friedrich, M., Kaiser, K. F., Southon, J.: Tree rings and ice cores reveal 14C calibration uncertainties during the Younger Dryas, Nat. Geosci., 1, 263-267, doi:10.1038/ngeo128, 2008.
47. Muscheler, R., Adolphi, F., Knudsen, M. F.: Assessing the differences between the IntCal and Greenland ice-core time scales for the last 14,000 years via the common cosmogenic radionuclide variations, Quaternary Sci. Rev., 106, 81-87, doi:10.1016/j.quascirev.2014.08.017, 2014a.
48. Muscheler, R., Adolphi, F., Svensson, A.: Challenges in 14C dating towards the limit of the method inferred from anchoring a floating tree ring radiocarbon chronology to ice core records around the Laschamp geomagnetic field minimum, Earth Planet. Sc. Lett., 394, 209-215, doi:10.1016/j.epsl.2014.03.024, 2014b.
49. Oeschger, H., Siegenthaler, U., Schotterer, U., Gugelmann, A.: A box diffusion model to study the carbon dioxide exchange in nature, Tellus, 27, 168-192, doi:10.1111/j.2153-3490.1975.tb01671.x, 1975.
50. Pearce, N. J. G., Westgate, J. A., Preece, S. J., Eastwood, W. J., Perkins, W. T.: Identification of Aniakchak (Alaska) tephra in Greenland ice core challenges the 1645 BC date for Minoan eruption of Santorini, Geochem. Geophy. Geosy., 5, Q03005, doi:10.1029/2003GC000672, 2004.
51. Pedro, J. B., Heikkilä, U. E., Klekociuk, A., Smith, A. M., van Ommen, T. D., Curran, M. A. J.: Beryllium-10 transport to Antarctica: Results from seasonally resolved observations and modeling, J. Geophys. Res.-Atmos., 116, D23120, doi:10.1029/2011jd016530, 2011a.
52. Pedro, J. B., Smith, A. M., Simon, K. J., van Ommen, T. D., Curran, M. A. J.: High-resolution records of the beryllium-10 solar activity proxy in ice from Law Dome, East Antarctica: measurement, reproducibility and principal trends, Clim. Past, 7, 707-721, doi:10.5194/cp-7-707-2011, 2011b.
53. Pedro, J. B., McConnell, J. R., van Ommen, T. D., Fink, D., Curran, M. A. J., Smith, A. M., Simon, K. J., Moy, A. D., Das, S. B.: Solar and climate influences on ice core 10Be records from Antarctica and Greenland during the neutron monitor era, Earth Planet. Sc. Lett., 355-356, 174-186, doi:10.1016/j.epsl.2012.08.038, 2012.
54. Pilcher, J. R., Baillie, M. G. L., Schmidt, B., Becker, B.: A 7,272-year tree-ring chronology for western Europe, Nature, 312, 150-152, 1984.
55. Raisbeck, G. M., Yiou, F., Fruneau, M., Loiseaux, J. M., Lieuvin, M., Ravel, J. C.: Cosmogenic 10Be/7Be as a probe of atmospheric transport processes, Geophys. Res. Lett., 8, 1015-1018, doi:10.1029/GL008i009p01015, 1981.
56. Rasmussen, S. O., Andersen, K. K., Svensson, A. M., Steffensen, J. P., Vinther, B. M., Clausen, H. B., Siggaard-Andersen, M. L., Johnsen, S. J., Larsen, L. B., Dahl-Jensen, D., Bigler, M., Röthlisberger, R., Fischer, H., Goto-Azuma, K., Hansson, M. E., Ruth, U.: A new Greenland ice core chronology for the last glacial termination, J. Geophys. Res., 111, D06102, doi:10.1029/2005jd006079, 2006.
57. Reimer, P. J., Bard, E., Bayliss, A., Beck, J. W., Blackwell, P. G., Bronk Ramsey, C., Buck, C. E., Cheng, H., Edwards, R. L., Friedrich, M., Grootes, P. M., Guilderson, T. P., Haflidason, H., Hajdas, I., Hatté, C., Heaton, T. J., Hoffmann, D. L., Hogg, A. G., Hughen, K. A., Kaiser, K. F., Kromer, B., Manning, S. W., Niu, M., Reimer, R. W., Richards, D. A., Scott, E. M., Southon, J. R., Staff, R. A., Turney, C. S. M., van der Plicht, J.: IntCal13 and Marine13 Radiocarbon Age Calibration Curves 0-50,000 Years cal BP, Radiocarbon, 55, 1869-1887, 2013.
58. Roth, R., Joos, F.: A reconstruction of radiocarbon production and total solar irradiance from the Holocene 14C and CO2 records: implications of data and model uncertainties, Clim. Past, 9, 1879-1909, doi:10.5194/cp-9-1879-2013, 2013.
59. Seierstad, I. K., Abbott, P. M., Bigler, M., Blunier, T., Bourne, A. J., Brook, E., Buchardt, S. L., Buizert, C., Clausen, H. B., Cook, E., Dahl-Jensen, D., Davies, S. M., Guillevic, M., Johnsen, S. J., Pedersen, D. S., Popp, T. J., Rasmussen, S. O., Severinghaus, J. P., Svensson, A., Vinther, B. M.: Consistently dated records from the Greenland GRIP, GISP2 and NGRIP ice cores for the past 104 ka reveal regional millennial-scale-18O gradients with possible Heinrich event imprint, Quaternary Sci. Rev., 106, 29-46, doi:10.1016/j.quascirev.2014.10.032, 2014.
60. Siegenthaler, U., Heimann, M., Oeschger, H.: 14C variations caused by changes in the global carbon cycle, Radiocarbon, 22, 177-191, 1980.
61. Sigl, M., Winstrup, M., McConnell, J. R., Welten, K. C., Plunkett, G., Ludlow, F., Buntgen, U., Caffee, M., Chellman, N., Dahl-Jensen, D., Fischer, H., Kipfstuhl, S., Kostick, C., Maselli, O. J., Mekhaldi, F., Mulvaney, R., Muscheler, R., Pasteris, D. R., Pilcher, J. R., Salzer, M., Schupbach, S., Steffensen, J. P., Vinther, B. M., Woodruff, T. E.: Timing and climate forcing of volcanic eruptions for the past 2,500 years, Nature, 523, 543-549, doi:10.1038/nature14565, 2015.
62. Southon, J.: A First Step to Reconciling the GRIP and GISP2 Ice-Core Chronologies, 0-14,500 yr B.P, Quaternary Res., 57, 32-37, doi:10.1006/qres.2001.2295, 2002.
63. Spurk, M., Leuschner, H. H., Baillie, M. G. L., Briffa, K. R., Friedrich, M.: Depositional frequency of German subfossil oaks: climatically and non-climatically induced fluctuations in the Holocene, The Holocene, 12, 707-715, doi:10.1191/0959683602hl583rp, 2002.
64. Stuiver, M., Braziunas, T. F., Grootes, P. M., Zielinski, G. A.: Is There Evidence for Solar Forcing of Climate in the GISP2 Oxygen Isotope Record, Quaternary Res., 48, 259-266, doi:10.1006/qres.1997.1931, 1997.
65. Stuiver, M., Reimer, P. J., Bard, E., Beck, J.W., Burr, G. S., Hughen, K., Kromer, B., McCormac, F. G., Van der Plicht, J., Spurk, M.: INTCAL98 radiocarbon age calibration, 24000-0 cal BP, Radiocarbon, 40, 1041-1083, 1998.
66. Svensson, A., Andersen, K. K., Bigler, M., Clausen, H. B., Dahl-Jensen, D., Davies, S. M., Johnsen, S. J., Muscheler, R., Parrenin, F., Rasmussen, S. O., Röthlisberger, R., Seierstad, I., Steffensen, J. P., Vinther, B. M.: A 60 000 year Greenland stratigraphic ice core chronology, Clim. Past, 4, 47-57, doi:10.5194/cp-4-47-2008, 2008.
67. Vinther, B. M., Clausen, H. B., Johnsen, S. J., Rasmussen, S. O., Andersen, K. K., Buchardt, S. L., Dahl-Jensen, D., Seierstad, I. K., Siggaard-Andersen, M. L., Steffensen, J. P., Svensson, A., Olsen, J., Heinemeier, J.: A synchronized dating of three Greenland ice cores throughout the Holocene, J. Geophys. Res., 111, D13102, doi:10.1029/2005jd006921, 2006.
68. Vonmoos, M., Beer, J., Muscheler, R.: Large variations in Holocene solar activity: Constraints from 10Be in the Greenland Ice Core Project ice core, J. Geophys. Res., 111, A10105, doi:10.1029/2005ja011500, 2006.
69. Yiou, F., Raisbeck, G. M., Baumgartner, S., Beer, J., Hammer, C., Johnsen, S., Jouzel, J., Kubik, P. W., Lestringuez, J., Stiévenard, M., Suter, M., Yiou, P.: Beryllium 10 in the Greenland Ice Core Project ice core at Summit, Greenland, J. Geophys. Res., 102, 26783, doi:10.1029/97jc01265, 1997.