Author: Hammer, C.U.

Baumgartner, S.M., J. Beer, M. Suter, B. Dittrich-Hannen, H.-A. Synal, P.W. Kubik, C.U. Hammer, and S.J. Johnsen. 1997. Chlorine 36 fallout in the Summit Greenland Ice Core Project ice core. Journal of Geophysical Research 102:26659-26662.
Clausen, H.B., and C.U. Hammer. 1988. The Laki and Tambora eruptions as revealed in Greenland ice cores from 11 locations. Annals of Glaciology 10:16-22.
Clausen, H.B., C.U. Hammer, C.S. Hvidberg, D. Dahl-Jensen, J.P. Steffensen, J. Kipfstuhl, and M.R. Legrand. 1997. A comparison of the volcanic records over the past 4000 years from the Greenland Ice Core Project and Dye 3 Greenland ice cores. Journal of Geophysical Research 102:26707-26723.
Clausen, H.B., C.U. Hammer, J. Christensen, C.S. Hvidberg, D. Dahl-Jensen, M.R. Legrand, and J.P. Steffensen. 1995. 1250 years of global volcanism as revealed by central Greenland ice cores. Ice Core Studies of Global Biogeochemical cycles, Annecy, France, R. Delmas (ed.). NATO Advanced Sciences Institutes Series 1, 30:175-194.
Dahl-Jensen, D., S.J. Johnsen, C.U. Hammer, H.B. Clausen, and J. Jouzel. 1993. Past accumulation rates derived from observed annual layers in the GRIP ice core from Summit, central Greenland. Pages 517-532 in W.R. Peltier, editor. Ice in the Climate System. Springer-Verlag, Berlin-Heidelberg, Germany.
Dahl-Jensen, D., S.J. Johnsen, C.U. Hammer, H.B. Clausen, and J. Jouzel. 1993. Past accumulation rates derived from observed annual layers in the GRIP ice core from Summit, Central Greenland. NATO Advanced Sciences Institutes Series 1:12. Springer-Verlag, Berlin, Heidelberg.
Dansgaard, W., S.J. Johnsen, H.B. Clausen, D. Dahl-Jensen, N.S. Gundestrup, C.U. Hammer, C.S. Hvidberg, J.P. Steffensen, A.E. Sveinbjörnsdóttir, J. Jouzel, and G.C. Bond. 1993. Evidence for general instability of past climate from a 250 kyr ice-core record. Nature 264:218-220.
De Angelis, M., J.P. Steffensen, M.R. Legrand, H.B. Clausen, and C.U. Hammer. 1997. Primary aerosol (sea salt and soil dust) deposited in Greenland ice during the last climatic cycle: Comparison with east Antarctic records. Journal of Geophysical Research 102:26681-26698.
Gronvöld, K., N. Oskarsson, S.J. Johnsen, H.B. Clausen, C.U. Hammer, G.C. Bond, and E. Bard. 1995. Ash layers from Iceland in the Greenland GRIP ice core correlated with oceanic and land sediments. Earth and Planetary Science Letters 135:149-155.
Hammer, C.U. 1980. Acidity of polar ice cores in relation to absolute dating, past volcanism, and radio-echoes. Journal of Glaciology 25: 359-372.
Hammer, C.U., and D.A. Meese. 1993. Dating ice cores. Nature 363:666.
Hammer, C.U., H.B. Clausen, and W. Dansgaard. 1980. Greenland ice sheet evidence of post-glacial volcanism and its climatic impact. Nature 288:230-235.
Hammer, C.U., K.K. Andersen, H.B. Clausen, D. Dahl-Jensen, C.S. Hvidberg, and P. Iversen. 1997. The stratigraphic dating of the GRIP ice core. Special Report of the Geophysical Department, Niels Bohr Institute for Astronomy, Physics and Geophysics, University of Copenhagen.
Johnsen, S.J., H.B. Clausen, W. Dansgaard, K. Fuhrer, N.S. Gundestrup, C.U. Hammer, P. Iversen, J. Jouzel, B. Stauffer, and J.P. Steffensen. 1992. Irregular glacial interstadials recorded in a new Greenland ice core. Nature 359:311-313.
Johnsen, S.J., H.B. Clausen, W. Dansgaard, N.S. Gundestrup, C.U. Hammer, and H. Tauber. 1995. The Eem stable isotope record along the GRIP ice core and its interpretation. Quaternary Research 43:117-124.
Johnsen, S.J., H.B. Clausen, W. Dansgaard, N.S. Gundestrup, C.U. Hammer, U. Andersen, K.K. Andersen, C.S. Hvidberg, D. Dahl-Jensen, J.P. Steffensen, H. Shoji, A.E. Sveinbjörnsdóttir, J.W.C. White, J. Jouzel, and D. Fisher. 1997. The d18O record along the Greenland Ice Core Project deep ice core and the problem of possible Eemian climatic instability. Journal of Geophysical Research 102:26397-26410.
Legrand, M.R., C.U. Hammer, M. De Angelis, J. Savarino, R. Delmas, H.B. Clausen, and S.J. Johnsen. 1997. Sulfur-containing species (methanesulfonate and SO4) over the last climatic cycle in the Greenland Ice Core Project (central Greenland) ice core. Journal of Geophysical Research 102:26663-26679.
Moore, J.C., E.W. Wolff, H.B. Clausen, C.U. Hammer, M.R. Legrand, and K. Fuhrer. 1994. Electrical response of the Summit-Greenland ice core to ammonium, sulphuric acid, and hydrochloric acid. Geophysical Research Letters 21:565-568.
Steffensen, J.P., H.B. Clausen, C.U. Hammer, M.R. Legrand, and M. De Angelis. 1997. The chemical composition of cold events within the Eemian section of the Greenland Ice Core Project ice core from Summit, Greenland. Journal of Geophysical Research 102:26747-26754.
Taylor, K.C., C.U. Hammer, R.B. Alley, H.B. Clausen, D. Dahl-Jensen, A.J. Gow, N.S. Gundestrup, J. Kipfstuhl, J.C. Moore, and E.D. Waddington. 1993. Electrical conductivity measurements from the GISP2 and GRIP Greenland ice cores. Nature 366:549-552.
Wolff, E.W., J.C. Moore, H.B. Clausen, and C.U. Hammer. 1997. Climatic implications of background acidity and other chemistry derived from electrical studies of the Greenland Ice Core Project ice core. Journal of Geophysical Research 102:26325-26332.
Wolff, E.W., J.C. Moore, H.B. Clausen, C.U. Hammer, J. Kipfstuhl, and K. Fuhrer. 1995. Long-term changes in the acid and salt concentrations of the Greenland Ice Core Project ice core from electrical stratigraphy. Journal of Geophysical Research 100:16249-16263.
Yiou, F., G.M. Raisbeck, S.M. Baumgartner, J. Beer, C.U. Hammer, S.J. Johnsen, J. Jouzel, P.W. Kubik, J. Lestringuez, M. Stiévenard, M. Suter, and P. Yiou. 1997. Beryllium 10 in the Greenland Ice Core Project ice core at Summit, Greenland. Journal of Geophysical Research 102:26783-26794.