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Náttúrufræðingurinn - 2012, Side 145

Náttúrufræðingurinn - 2012, Side 145
145 Tímarit Hins íslenska náttúrufræðifélags 22. Dansgaard, W., Clausen, H.B., Gundestrup, N., Hammer, C.U., Sigfús J. Johnsen, Pálína M. Kristinsdóttir & Reeh, N. 1982. A new Greenland deep ice core. Science 218. 1273–1277. 23. Dansgaard, W., Sigfús J. Johnsen, Clausen, H.B., Dahl-Jensen, D., Gunde- strup, N.S., Hammer, C.U., Hvidberg, C.S., Steffensen, J.P., Árný E. Svein- björnsdóttir, Jouzel, J. & Bond, G. 1993. Evidence for general instability of past climate from a 250-kyr ice-core record. Nature 364. 218–220. 24. Greenland Ice-Core Project (GRIP) Members 1993. Climate instability during the last interglacial period recorded in the GRIP ice core. Nature 364. 203–207. 25. Stuiver, M. & Grootes, P.M. 2000. GISP2 oxygen-isotope ratios. Quater- nary Research 53. 277–284. 26. Grootes, P.M., Stuiver, M., White, J.W.C., Sigfús J. Johnsen & Jouzel, J. 1993. Comparison of oxygen isotope records from the GISP2 and GRIP Greenland ice cores. Nature 366. 552–554. 27. Andersen, K.K., Svensson, A., Sigfús J. Johnsen, Rasmussen, S.O., Bigler, M., Röthlisberger, R., Ruth, U., Siggaard-Andersen, M.-L., Steffensen, J.P., Dahl-Jensen, D, Vinther, B.M. & Clausen H.B. 2006. The Green- land Ice Core Chronology 2005, 15-42 kyr. Part 1: constructing the time scale. Quaternary Science Reviews 25 (23–24). 3246–3257. 28. Svensson, A., Andersen, K.K. Bigler, M., Clausen, H.B., Dahl-Jensen, D., Davies, S.M., Sigfús J. Johnsen, Muscheler, R., Rasmussen, S.O., Röthlis- berger, R., Steffensen, J.P. & Vinther, B.M. 2006. The Greenland ice core chronology 2005, 15-42 ka. Part 2: comparison to other records. Quater- nary Science Reviews 25 (23–24). 3258–3267. 29. Rasmussen, S.O., Andersen, K.K., Svensson, A.M., Steffensen, J.P., Vinther, B.M., Clausen, H.B., Siggaard-Andersen, M.-L., Sigfús J. Johnsen, Larsen, L.B., Dahl-Jensen, D., Bigler, M., Röthlisberger, R., Fischer, H., Goto-Azuma, K., Hansson, M. E. & Ruth, U. 2006. A new Greenland ice core chronology for the last glacial termination. Journal of Geophysical Research 111. D06102, doi:06110.01029/02005JD006079. 30. Dansgaard, W., Sigfús J. Johnsen, Clausen, H.B. & Gundestrup, N. 1973. Stable isotope glaciology. Meddelelser om Grønland 197, Nr. 2. 53 bls. 31. Sigfús J. Johnsen, Clausen, H.B., Cuffey, K.M., Hoffmann, G., Schwan- der, J. & Creyts, T. 2000. Diffusion of stable isotopes in polar firn and ice: the isotope effect in firn diffusion. Bls. 121–140 í: Physics of Ice Core Records (ritstj. Hondoh, T.). Hokkaido University Press, Sapporo. 32. Dahl-Jensen, D., Mosegaard, K., Gundestrup, N., Clow, G.D., Sigfús J. Johnsen, Hansen, A.W. & Balling, N. 1998. Past temperatures directly from the Greenland Ice Sheet. Science 282. 268–271. 33. Stouffer, R.J., Yin, J., Gregory, J.M., Dixon, K.W., Spelman, M.J., Hurlin, W., Weaver, A.J., Eby, M., Flato, G.M., Hasumi, H., Hu, A., Jungclaus, J.H., Kamenkovich, I.V., Levermann, A., Montoya, M., Murakami, S., Nawrath, S., Oka, A., Peltier, W.R., Robitaille, D.Y., Sokolov, A., Vet- toretti, G. & Weber, S.L. 2006. Investigating the causes of the response of the Thermohaline Circulation to past and future climate changes. Journal of Climate 19. 1365–1387. 34. McManus, J.F., Francois, R., Gherardi, J.-M., Keigwin, L.D. & Brown- Leger. S. 2004. Collapse and rapid resumption of Atlantic meridional circulation linked to deglacial climate changes. Nature 428. 834–837. 35. Seager, R. & Battisti, D.S. 2005. Challenges to our understanding of the general circulation: abrupt climate change. Paleo “circ” 3, chapter 2. 46 bls. 36. Huber, C., Leuenberger, M., Spahni, R., Flukiger, J., Schwander, J., Stocker, T.F., Johnsen, S.J., Landais, A. & Jouzel, J. 2006. Earth and Planetary Sci. Letters 243. 504–519. 37. Landais, A., Chapellaz, J., Delmotte, M., Jouzel, J., Blunier, T., Bourg, C, Caillon, N., Cherrier, S., Malaizé, B., Masson-Delmotte, V., Raynaud, D., Schwander, J. & Steffensen, J.P. 2003. A tentative reconstruction of the last interglacial and glacial inception in Greenland based on new gas meas- urements in the Greenland Ice Core Project (GRIP) ice core. Journal Geophysical Research 108. doi:10.1029/2002JD0003147. 38. Steffensen, J.P., Andersen, K.K., Bigler, M., Clausen, H.B., Dahl-Jensen, D., Fisher, H., Goto-Azuma, K., Hansson, M., Sigfús J. Johnsen, Jouzel, J., Masson-Delmotte, V., Popp, T., Rasmussen, S.O., Röthlisberger, R., Ruth, U., Stauffer, B., Siggaard-Andersen, M.-L., Árný E. Sveinbjörnsdóttir, Sven- sson, A. & White, J.W.C. 2008. High-Resolution Greenland Ice Core Data show abrupt climate change happens in few years. Science 321. 680–684. 39. Andersen, K.K., Armengaud, A. & Genthon, C. 1998. Atmospheric dust under glacial and interglacial conditions. Geophysical Research Letters 25 (13). 2281–2284. 40. Svensson, A., Biscaye, P.E. & Grousset, F.E. 2000. Characterization of late glacial continental dust in the Greenland Ice Core Project ice core. Journal of Geophysical Research 105(D4). 4637–4656. 41. Bory, A.J.-M., Biscaye, P.E., Svensson, A. & Grousset, F.E. 2002. Seasonal variability in the origin of recent atmospheric mineral dust at North- GRIP, Greenland. Earth and Planetary Science Letters 196. 123–134. 42. Vinther, B.M., Buchardt, S.L., Clausen, H.B., Dahl-Jensen, D., Sigfús J. Johnsen, Fisher, D.A., Koerner, R.M., Raynaud, D., Lipenkov, V., Andersen, K.K., Blunier, T., Rasmussen, S.O., Steffensen, J.P. & Svensson, A.M. 2009. Holocene thinning of the Greenland ice sheet. Nature 461. 385–388. 43. Jouzel, J., Masson-Delmotte, V., Cattani, O., Dreyfus, G., Falourd, S., Hoffmann, G., Minster, B., Nouet, J., Barnola, J.M., Chappellaz, J., Fischer, H., Gallet, J.C., Sigfús J. Johnsen, Leuenberger, M., Loulergue, L., Luethi, D., Oerter, H., Parrenin, F., Raisbeck, G., Raynaud, D., Schilt, A., Schwander, J., Selmo, E., Souchez, R., Spahni, R., Stauffer, B., Stef- fensen, J.P., Stenni, B., Stocker, T.F., Tison, J.L., Werner, M. & Wolff, E.W. 2007. Orbital and millennial antarctic climate variability over the Past 800,000 years. Science 317. 793–796. 44. EPICA community members 2006. One-to-one coupling of glacial climate variability in Greenland and Antarctica. Nature 444. 195–198. Um höfundana Árný Erla Sveinbjörnsdóttir (f. 1953) lauk BS-prófi í jarðfræði frá Háskóla Íslands 1978 og doktorsprófi í jarðefnafræði frá University of East Anglia í Norwich, Englandi 1983. Hún starfaði við jarðhitarannsóknir hjá Orkustofnun (nú Isor) á árunum 1984–1985 og hefur starfað hjá Raunvísindastofnun Háskólans frá 1986, einkum við rannsóknir á samsætum súrefnis og vetnis í vatni og við aldursgreiningar með 14C-aðferð. Sigfús Jóhann Johnsen (f. 1940) lauk cand.scient.-prófi í eðlisfræði frá Kaupmannahafnarháskóla 1966. Hann starfaði í Kaupmannahöfn til 1989 og síðan jafnframt við Háskóla Íslands. Árið 2010 var Sigfús gerður að heiðursdoktor við Jarðvísindadeild Háskóla Íslands. Hann hefur einkum stundað rannsóknir á fornveður- fari út frá ískjörnum úr Grænlandsjökli og hefur hann- að ísborana sem þar hafa dugað best. Póst- og netföng höfunda/Authors’ addresses Árný Erla Sveinbjörnsdóttir Jarðvísindastofnun Háskólans Öskju, Sturlugötu 7 IS-101 Reykjavík arny@hi.is Sigfús Jóhann Johnsen Ice and Climate, Niels Bohr Institute University of Copenhagen Juliane Maries Vej 30 DK-2100 Copenhagen Denmark sigfus@gfy.ku.dk
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