Greenland Summit Ice Cores Bibliography


Alley, R.B. 1992. Flow-law hypotheses for ice-sheet modeling. Journal of Glaciology 38:245-256.

Alley, R.B. 1995. Resolved: The Arctic controls global climate change. Pages 263-283 in W.O. Smith, Jr. and J.M. Grebmeier, editors. Arctic Oceanography: marginal ice zone and continental shelves. American Geophysical Union Coastal and Estuarine Studies.

Alley, R.B., A.J. Gow, and D.A. Meese. 1995. Mapping c-axis fabrics to study physical processes in ice. Journal of Glaciology 41:197-203.

Alley, R.B., A.J. Gow, D.A. Meese, J.J. Fitzpatrick, E.D. Waddington, and J.F. Bolzan. 1997. Grain-scale processes, folding, and stratigraphic disturbance in the GISP2 ice core. Journal of Geophysical Research 102:26819-26830.

Alley, R.B., A.J. Gow, S.J. Johnsen, J. Kipfstuhl, D.A. Meese, and T. Thorsteinsson. 1995. Comparison of deep ice cores. Nature 373:393-394.

Alley, R.B., and B.R. Koci. 1990. Recent warming in central Greenland? Annals of Glaciology 14:6-8.

Alley, R.B., and G.A. Woods. 1996. Impurity influence on normal grain growth in the GISP2 ice core, Greenland. Journal of Glaciology 42:255-260.

Alley, R.B., and S. Anandakrishnan. 1995. Variations in melt-layer frequency in the GISP2 ice core: implications for Holocene summer temperatures in central Greenland. Annals of Glaciology 21:64-70.

Alley, R.B., C.A. Shuman, D.A. Meese, A.J. Gow, K.C. Taylor, K.M. Cuffey, J.J. Fitzpatrick, P.M. Grootes, G.A. Zielinski, M. Ram, G. Spinelli, and B.C. Elder. 1997. Visual-stratigraphic dating of the GISP2 ice core: Basis, reproducibility, and application. Journal of Geophysical Research 102:26367-26381.

Alley, R.B., D.A. Meese, C.A. Shuman, A.J. Gow, K.C. Taylor, P.M. Grootes, J.W.C. White, M. Ram, E.D. Waddington, P.A. Mayewski, and G.A. Zielinski. 1993. Abrupt increase in Greenland snow accumulation at the end of the Younger Dryas event. Nature 362:527-529.

Alley, R.B., E.S. Saltzman, K.M. Cuffey, and J.J. Fitzpatrick. 1990. Summertime formation of depth hoar in central Greenland. Geophysical Research Letters 17:2393-2396.

Alley, R.B., P.A. Mayewski, T. Sowers, M. Stuiver, K.C. Taylor, and P.U. Clark. 1997. Holocene climatic instability: A prominent, widespread event 8200 years ago. Geology 25:483-486.

Alley, R.B., R.C. Finkel, K. Nishiizumi, S. Anandakrishnan, C.A. Shuman, G.R. Mershon, G.A. Zielinski, and P.A. Mayewski. 1995. Changes in continental and sea-salt atmospheric loadings in central Greenland during the most recent deglaciation: Model-based estimates. Journal of Glaciology 41:503-514.

Anandakrishnan, S., J.J. Fitzpatrick, R.B. Alley, A.J. Gow, and D.A. Meese. 1995. Shear-wave detection of asymmetric c-axis fabrics in the GISP2 ice core, Greenland. Journal of Glaciology 40:491-496.

Anandakrishnan, S., R.B. Alley, and E.D. Waddington. 1994. Sensitivity of ice-divide position in Greenland to climate change. Geophysical Research Letters 21(6):441-444.

Anklin, M., J. Schwander, B. Stauffer, J. Tschumi, A. Fuchs, J.M. Barnola, and D. Raynaud. 1997. CO2 record between 40 and 8kyr B.P. from the Greenland Ice Core Project ice core. Journal of Geophysical Research 102:26539-26545.

Anklin, M., J.M. Barnola, J. Schwander, B. Stauffer, and D. Raynaud. 1995. Processes affecting the CO2 concentrations measured in Greenland ice. Tellus 47B:461-470.

Bales, R.C., and E.W. Wolff. 1995. Interpreting natural climate signals in ice cores. Eos 76:(47):477-480.

Bales, R.C., and J. Choi. 1996. Conceptual framework for interpretation of exchange processes. Chemical Exchange between the Atmosphere and Polar Snow. E. Wolff and R.C. Bales (editors), NATO Advanced Sciences Institutes Series 43:319-338.

Bales, R.C., J.R. McConnell, M.V. Losleben, M.H. Conklin, K. Fuhrer, A. Neftel, J.E. Dibb, J.D.W. Kahl, and C.R. Stearns. 1995. Diel variations of H2O2 in Greenland: A discussion of the cause and effect relationship. Journal of Geophysical Research 100:18661-18668.

Bales, R.C., M.V. Losleben, and J.R. McConnell. 1995. H2O2 in snow, air and open pore space in firn at Summit, Greenland. Geophysical Research Letters 22:1261-1264.

Barlow, L.K. 1994. Evaluation of seasonal to decadal scale deuterium and deuterium excess signals, GISP2 ice core, Summit, Greenland, A.D. 1270-1985. Ph.D. Thesis, University of Colorado, Boulder, Colorado, USA.

Barlow, L.K., J.C. Rogers, M.C. Serreze, and R.G. Barry. 1997. Aspects of climate variability in the North Atlantic sector: Discussion and relation to the Greenland Ice Sheet Project 2 high-resolution isotopic signal. Journal of Geophysical Research 102:26333-26344.

Barlow, L.K., J.W.C. White, R.G. Barry, J.C. Rogers, and P.M. Grootes. 1993. The North Atlantic oscillation signature in deuterium and deuterium excess signals in the Greenland Ice Sheet Project 2 ice core, 1840-1970. Geophysical Research Letters 20:2901-2904.

Barnola, J.M., M. Anklin, J. Porcheron, D. Raynaud, J. Schwander, and B. Stauffer. 1995. CO2 evolution during the last millennium as recorded by Antarctic and Greenland ice. Tellus 47B:264-272.

Barnola, J.M., P. Pimienta, D. Raynaud, and Y.S. Korotkevich. 1991. CO2-climate relationship as deduced from the Vostok ice core: A re-examination based on new measurements and on a re-evaluation of the air dating. Tellus 43B:83-90.

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.

Bender, M., T. Sowers, M.L. Dickson, J. Orchardo, P.M. Grootes, P.A. Mayewski, and D.A. Meese. 1994. Climate correlations between Greenland and Antarctica during the past 100,000 years. Nature 372:663-666.

Bergin, M.H., C.I. Davidson, J.E. Dibb, J.L. Jaffrezo, H.D. Huhns, and S.N. Pandis. 1995. A simple model to estimate atmospheric concentrations of aerosol chemical species based on snow core chemistry at Summit, Greenland. Geophysical Research Letters 22:3517-3520.

Bergin, M.H., C.I. Davidson, J.L. Jaffrezo, J.E. Dibb, R. Hillamo, H.D. Kuhns, and T. Makela. 1995. The contributions of wet, fog, and dry deposition to the summer SO4 flux at Summit, Greenland. Ice Core Studies of Global Biogeochemical Cycles, Annecy, France, R. Delmas (ed.). NATO Advanced Sciences Institutes Series 1, 30:121-138.

Bergin, M.H., J.L. Jaffrezo, C.I. Davidson, J.E. Dibb, S.N. Pandis, R. Hillamo, W. Maenhaut, H.D. Kuhns, and T. Makela. 1995. The contributions of snow, fog, and dry deposition to the summer flux of anions and cations at Summit, Greenland. Journal of Geophysical Research 100:16275-16288.

Bergin, M.H., J.L. Jaffrezo, C.I. Davidson, R. Caldow, and J.E. Dibb. 1994. Fluxes of chemical species to the Greenland ice sheet at Summit by fog and dry deposition. Geochimica et Cosmochimica Acta 58:3207-3215.

Bergin, M.H., S.N. Pandis, C.I. Davidson, J.L. Jaffrezo, J.E. Dibb, A.G. Russell, and H.D. Kuhns. 1996. Modeling of the processing and removal of trace gas and aerosol species by Arctic radiation fogs and comparison with measurements. Journal of Geophysical Research 101:14465-14478.

Biscaye, P.E., F.E. Grousset, M. Revel, S. Van der Gaast, G.A. Zielinski, A. Vaars, and G. Kukla. 1997. Asian provenance of glacial dust (stage 2) in the Greenland Ice Sheet Project 2 ice core, Summit, Greenland. Journal of Geophysical Research 102:26765-26781.

Blunier, T., J.A. Chappellaz, J. Schwander, B. Stauffer, and D. Raynaud. 1995. Variations in atmospheric methane concentration during the Holocene epoch. Nature 374:46-49.

Blunier, T., J.A. Chappellaz, J. Schwander, J.M. Barnola, T. Desperts, B. Stauffer, and D. Raynaud. 1993. Atmospheric methane record from a Greenland ice core over the last 1000 years. Geophysical Research Letters 20:2219-2222.

Bolzan, J.F., and M. Strobel. 1994. Accumulation-rate variations around Summit, Greenland. Journal of Glaciology 40:56-66.

Bolzan, J.F., E.D. Waddington, R.B. Alley, and D.A. Meese. 1995. Constraints on Holocene ice-thickness changes in central Greenland from the GISP2 ice-core data. Annals of Glaciology 21:33-39.

Bond, G.C., W.S. Broecker, S.J. Johnsen, J.F. McManus, L. Labeyrie, J. Jouzel, and G. Bonani. 1993. Correlations between climate records from North Atlantic sediments and Greenland ice. Nature 365:143-147.

Borys, R.D., D. Del Vecchio, J.L. Jaffrezo, J.E. Dibb, and D.L. Mitchell. 1992. Field observations, measurements, and preliminary results from a study of wet deposition processes influencing snow and ice chemistry at Summit, Greenland. Precipitation Scavenging and Atmosphere-Surface Exchange, Vol. 3, S.E. Schwartz and W.G.N. Slinn, Coordinators, Hemisphere Publishing Corp. p.1705-1718.

Boyle, E.A., R.M. Sherrell, and M.P. Bacon. 1994. Lead variability in the western North Atlantic Ocean and central Greenland ice: Implications for the search for decadal trends in anthropogenic emissions. Geochimica et Cosmochimica Acta 58:3227-3238.

Broecker, W.S. 1997. Will our ride into the greenhouse future be a smooth one? GSA Today 7(5):1-7.

Brook, E.J., T. Sowers, and J. Orchardo. 1996. Rapid variations in atmospheric methane concentration during the past 110,000 years. Science 273:1087-1091.

Buck, C.F., P.A. Mayewski, M.J. Spencer, S.I. Whitlow, M.S. Twickler, and D. Barrett. 1992. Determination of major ions in snow and ice cores by ion chromatography. Journal of Chromatography 594:225-228.

Castelnau, O., T. Thorsteinsson, J. Kipfstuhl, P. Duval, and G.R. Canova. 1996. Modelling fabric development along the GRIP ice core, central Greenland. Annals of Glaciology 23:194-201.

Chappellaz, J.A. 1990. Etude du methane atmospherique au cours du dernier cycle climatique a partir d l'analyse de l'air piege dans la glace antarctique, PhD thesis, University of Grenoble, 214pp.

Chappellaz, J.A., E.J. Brook, T. Blunier, and B. Malaizé. 1997. CH4 and d18O of O2 records from Antarctic and Greenland ice: A clue for stratigraphic disturbance in the bottom part of the Greenland Ice Core Project and the Greenland Ice Sheet Project 2 ice cores. Journal of Geophysical Research 102:26547-26557.

Chappellaz, J.A., J.M. Barnola, D. Raynaud, Y.S. Korotkevich, and C. Lorius. 1990. Ice-core record of atmospheric methane over the past 160,000 years. Nature 345:127-131.

Chappellaz, J.A., T. Blunier, D. Raynaud, J.M. Barnola, J. Schwander, and B. Stauffer. 1993. Synchronous changes in atmospheric CH4 and Greenland climate between 40 and 8 kyr B.P. Nature 366:443-445.

Charles, C.D., D. Rind, J. Jouzel, R.D. Koster, and R.G. Fairbanks. 1994. Glacial-interglacial changes in moisture sources for Greenland: Influences on the ice core record of climate. Science 263:508-511.

Charlson, R.J., S.E. Schwartz, J.M. Hales, R.D. Cess, J.A. Coakley, Jr., J.E. Hansen, and D.J. Hofmann. 1992. Climate forcing by anthropogenic aerosols. Science 255:423-430.

Chylek, P., B. Johnson, P.A. Damiano, K.C. Taylor, and P. Clement. 1995. Biomass burning record and black carbon in the GISP2 ice core. Geophysical Research Letters 22:89-92.

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.

Clow, G.D., R.W. Saltus, and E.D. Waddington. 1995. High-precision temperature logging at GISP2, Greenland, May 1992. U.S. Geological Survey Open File Report 95-490.

Clow, G.D., R.W. Saltus, and E.D. Waddington. 1996. A new high-precision borehole-temperature logging system used at GISP2, Greenland, and Taylor Dome, Antarctica. Journal of Glaciology 42:576-584.

Conklin, M.H., A. Sigg, A. Neftel, and R.C. Bales. 1993. Atmosphere-snow transfer functions for H2O2: Microphysical considerations. Journal of Geophysical Research 98:18367-18376.

Corazza, E., and G. Tessi. 1995. Tropospheric hydrogen and carbon oxides in Antarctica and Greenland. The Science of the Total Environment 160/161:803-809.

Craig, H.C., and R.C. Wiens. 1996. Gravitational enrichment of 84Kr/36Ar ratios in polar ice caps: A measure of firn thickness and accumulation temperature. Science 271:1708-1710.

Cuffey, K.M., and E.J. Steig. (in press). Isotopic diffusion in polar firn: Implications for interpretation of seasonal climate parameters in ice core records, with emphasis on central Greenland. Journal of Glaciology.

Cuffey, K.M., and G.D. Clow. 1997. Temperature, accumulation, and ice sheet elevation in central Greenland through the last deglacial transition. Journal of Geophysical Research 102:26383-26396.

Cuffey, K.M., G.D. Clow, R.B. Alley, M. Stuiver, E.D. Waddington, and R.W. Saltus. 1995. Large Arctic temperature change at the Wisconsin-Holocene glacial transition. Science 270:455-458.

Cuffey, K.M., R.B. Alley, P.M. Grootes, and S. Anandakrishnan. 1992. Toward using borehole temperatures to calibrate an isotopic paleothermometer in central Greenland, 1992. Palaeogeography, Palaeoclimatology and Palaeoecology 98:265-268.

Cuffey, K.M., R.B. Alley, P.M. Grootes, J.F. Bolzan, and S. Anandakrishnan. 1994. Calibration of the delta18O isotopic paleothermometer for central Greenland, using borehole temperatures. Journal of Glaciology 40:341-349.

Cunningham, J., and E.D. Waddington. 1990. Boudinage: A source of stratigraphic disturbance in glacial ice in central Greenland. Journal of Glaciology 36:269-272.

Cunningham, J., and E.D. Waddington. 1993. Air flow and dry deposition of non-sea salt sulfate in polar firn: Paleoclimatic implications. Atmospheric Environment 27A:2943-2956.

Cutler, N.N., C.F. Raymond, E.D. Waddington, D.A. Meese, and R.B. Alley. 1995. The effect of ice-sheet thickness change on the accumulation history inferred from GISP2 layer thicknesses. Annals of Glaciology 21:26-32.

Dahl-Jensen, D. 1993. Reconstruction of palaeoclimate from temperature measurements in bore holes on the Greenland ice sheet. In Mosegaard, K., ed. Proceedings of the Interdisciplinary Inversion Workshop 2, Copenhagen. Copenhagen: University of Copenhagen, 11-14.

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.

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., T. Thorsteinsson, R.B. Alley, and H. Shoji. 1997. Flow properties of the ice from the Greenland Ice Core Project ice core: The reason for folds? Journal of Geophysical Research 102:26831-26840.

Dansgaard, W., and N.S. Gundestrup. 1993. Greenland: a temptation and a challenge. Endeavour 17:12-16.

Dansgaard, W., J.W.C. White, and S.J. Johnsen. 1989. The abrupt termination of the Younger Dryas climate event. Nature 339:532-533.

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.

Davidson, C.I., M.H. Bergin, and H.D. Huhns. 1996. The deposition of particles and gases to ice sheets. Chemical Exchange Between the Atmosphere and Polar Snow. E. Wolff and R.C. Bales (editors) NATO Advanced Sciences Institutes Series 43:275-306.

Davis, J.C., I.D. Proctor, J.R. Southon, M.W. Caffee, D.W. Heikkinen, M.L. Roberts, T.L. Moore, K.W. Turteltaub, D.E. Nelson, D.H. Loyd, and J.S. Vogel. 1990. LLNL/UC AMS facility and research program. Nuclear Instruments and Methods in Physics Research B52:269-272.

De Angelis, M., and M.R. Legrand. 1994. Origins and variations of fluoride in Greenland precipitation. Journal of Geophysical Research 99:1157-1172.

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.

Dibb, J.E. 1990. Beryllium-7 and lead-210 in the atmosphere and surface snow over the Greenland ice sheet in the summer of 1989. Journal of Geophysical Research 95:22407-22415.

Dibb, J.E. 1992. The accumulation of 210Pb at Summit, Greenland since 1855. Tellus 44B:72-79.

Dibb, J.E. 1996. Overview of field data on the deposition of aerosol-associated species to the surface snow of polar glaciers, particularly recent work in Greenland. Chemical Exchange Between the Atmosphere and Polar Snow. E. Wolff and R.C. Bales (editors) NATO Advanced Sciences Institutes Series 43:249-274.

Dibb, J.E., and J.L. Jaffrezo. 1997. Air-snow exchange investigations at Summit, Greenland: An overview. Journal of Geophysical Research 102:26795-26807.

Dibb, J.E., J.L. Jaffrezo, and M.R. Legrand. 1992. Initial findings of recent investigations of air-snow relationships in the Summit region of the Greenland ice sheet. Journal of Atmospheric Chemistry 14:167-180.

Dibb, J.E., R.W. Talbot, and M.H. Bergin. 1994. Soluble acidic species in air and snow at Summit, Greenland. Geophysical Research Letters 21:1627-1630.

Dibb, J.E., R.W. Talbot, S.I. Whitlow, M.C. Shipham, J.R. Winterle, J.R. McConnell, and R.C. Bales. 1996. Biomass burning signatures in the atmosphere and snow at Summit, Greenland: An event on 5 August, 1994. Atmospheric Environment 30:553-561.

Ditlevsen, P.D., H. Svensmark, and S.J. Johnsen. 1996. Contrasting atmospheric and climate dynamics of the last glacial and Holocene periods. Nature 379:810-812.

Dunphy, P.P., and J.E. Dibb. 1994. 137Cs gamma-ray detection at Summit, Greenland. Journal of Glaciology 40:87-92.

Dunphy, P.P., J.E. Dibb, and E.L Chupp. 1994. A gamma-ray detector for in-situ measurement of 137Cs radioactivity in snowfields and glaciers. Nuclear Instruments and Methods 353A:482-485.

Fawcett, P.J., A.M. Agustsdottir, R.B. Alley, and C.A. Shuman. 1997. The Younger Dryas termination and North Atlantic deep Water formation: Insights from climate model simulations and Greenland ice cores. Paleoceanography 12:23-38.

Fiacco, R.J., J.M. Palais, M.S. Germani, G.A. Zielinski, and P.A. Mayewski. 1993. Characteristics and possible source of a 1479 A.D. volcanic ash layer in a Greenland ice core. Quaternary Research 39:267-273.

Fiacco, R.J., Th. Thordarson, M.S. Germani, S. Self, J.M. Palais, S.I. Whitlow, and P.M. Grootes. 1994. Atmospheric aerosol loading and transport due to the 1783-84 Laki eruption in Iceland, interpreted from ash particles and acidity in the GISP2 ice core. Quaternary Research 42:231-240.

Finkel, R.C., and K. Nishiizumi. 1995. Cosmogenic radionuclides in the GISP2 ice core. Arctic Journal of the U.S. 9:40-43.

Finkel, R.C., and K. Nishiizumi. 1997. Beryllium 10 concentrations in the Greenland Ice Sheet Project 2 ice core from 3-40 ka. Journal of Geophysical Research 102:26699-26706.

Fischer, M.P., D. Elsworth, R.B. Alley, and T. Engelder. (in press). Finite element analysis of the modified ring test for determining mode I fracture toughness. International Journal of Rock Mechanics.

Fischer, M.P., R.B. Alley, and T. Engelder. (in press). Fracture toughness of ice and firn determined from the modified ring test. Journal of Glaciology.

Fronval, T., E. Jansen, J. Bloemendal, and S.J. Johnsen. 1995. Oceanic evidence for coherent fluctuations in fennoscandian and Laurentide ice sheets on millennium timescales. Nature 374:443-446.

Fuchs, A., and M.C. Leuenberger. 1996. d18O of atmospheric oxygen measured on the GRIP ice core document stratigraphic disturbances in the lowest 10% of the core. Geophysical Research Letters 9:1049-1052.

Fuhrer, K., A. Neftel, M. Anklin, and V. Maggi. 1993. Continuous measurements of hydrogen peroxide, formaldehyde, calcium and ammonium concentrations along the new GRIP ice core from Summit, Central Greenland. Atmospheric Environment 27A:1873-1880.

Fuhrer, K., A. Neftel, M. Anklin, T. Staffelbach, and M.R. Legrand. 1996. High-resolution ammonium ice core record covering a complete glacial-interglacial cycle. Journal of Geophysical Research 101:4147-4164.

Fuhrer, K., and M.R. Legrand. 1997. Continental biogenic species in the Greenland Ice Core Project ice core: Tracing back the biomass history of the North American continent. Journal of Geophysical Research 102:26735-26745.

Gosink, T.A., J.J. Kelley, B.R. Koci, and T.W. Burton. 1991. Butyl acetate, and alternative drilling fluid for deep ice-coring projects. Journal of Glaciology 37:170-176.

Gow, A.J., D.A. Meese, and R.B. Alley. 1993. Discontinuities including possible distortion of the environmental record in cores of deep basal ice from central Greenland, AGU Fall Meeting Abstract, p. 84.

Gow, A.J., D.A. Meese, R.B. Alley, J.J. Fitzpatrick, S. Anandakrishnan, G.A. Woods, and B.C. Elder. 1997. Physical and structural properties of the Greenland Ice Sheet Project 2 ice core: A review. Journal of Geophysical Research 102:26559-26575.

Graf, T., and H.C. Craig. 1997. GISP2: Gravitational enrichment of Kr/Ar and Xe/Ar ratios. EOS Transactions 78:F7.

GRIP Members. 1993. Climate instability during the last interglacial period recorded in the GRIP ice core. Nature 364:203-207.

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.

Grootes, P.M., and M. Stuiver. 1997. Oxygen 18/16 variability in Greenland snow and ice with 10-3- to 10-5-year time resolution. Journal of Geophysical Research 102:26455-26470.

Grootes, P.M., M. Stuiver, J.W.C. White, S.J. Johnsen, and J. Jouzel. 1993. Comparison of oxygen isotope records from the GISP2 and GRIP Greenland ice cores. Nature 366:552-554.

Gundestrup, N.S., D. Dahl-Jensen, S.J. Johnsen, and A. Rossi. 1993. Borehole survey at dome GRIP 1991. Cold Regions Science and Technology 21:399-402.

Gundestrup, N.S., H.B. Clausen, and B.L. Hansen. 1994. The UCPH borehole logger. Memoirs of the National Institute of Polar Research, Special Issue 49:224-233.

Gundestrup, N.S., H.B. Clausen, S.B. Hansen, and S.J. Johnsen. 1994. Hole liquids and gaskets for the ISTUK deep ice core drill. Memoirs of the National Institute of Polar Research 49:327-334.

Gundestrup, N.S., J.P. Steffensen, and J. Schwander. 1994. The GRIP deep drilling camp. Memoirs of the National Institute of Polar Research 49:358-370.

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.

Hancock, W.H. 1994. Instrumentation for the PICO deep ice coring drill. Ice Drilling Technology, 4th International Workshop, Memoirs of the National Institute of Polar Research, Special Issue 49:69-77.

Hempel, L., and F. Thyssen. 1992. Deep radio echo soundings in the vicinity of GRIP and GISP2 drill sites, Greenland. Polarforschung 62:11-16.

Hodge, S.M., D.L. Wright, J.A. Bradley, R.W. Jacobel, N. Skou, and B. Vaughn. 1990. Determination of the surface and bed topography in central Greenland. Journal of Glaciology 36:17-30.

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