Publications

Additional links to papers coming soon (PDFs for personal use).

  • Hardy, D.R. and others, in preparation. The climate of Kilimanjaro’s Northern Icefield [a summit climatology, based upon 20 years of measurements].
  • Kenji Yoshikawa, Douglas R. Hardy, Kenji Narita, William R. Bolton, Julia Stanilovskaya & Elena B. Sparrow (2021) Ground thermal regimes and implications for permafrost distribution on Kilimanjaro, Tanzania, Arctic, Antarctic, and Alpine Research, 53:1, 127-145, DOI: 10.1080/15230430.2021.1903375  >> Open Access
  • Hardy, D.R., C. Dufour, and P. Oosterbroek (2020): High latitude crane flies (Tipuloidea) and their importance as food for birds. Fly Times, v. 65, p. 15-20. >> VIEW
  • Mölg, T., Hardy, D. R., Collier, E., Kropa?, E., Schmid, C., Cullen, N. J., Kaser, G., Prinz, R., and Winkler, M. (2020): Mesoscale atmospheric circulation controls of local meteorological elevation gradients on Kersten Glacier near Kilimanjaro summit, Earth Syst. Dynam., 11, 653–672, https://doi.org/10.5194/esd-11-653-2020, 2020. >> VIEW
  • Collier, E., T. Sauter, T. Mölg, D.R. Hardy (2019): The influence of tropical cyclones on circulation, moisture transport, and snow accumulation at Kilimanjaro during the 2006 – 2007 season. Journal of Geophysical Research Atmospheres, vol. 124, pp. 6919-6928, https://doi.org/10.1029/2018JD030682. >> VIEW
  • Hurley, J.V., M. Vuille and D.R. Hardy (2019): On the interpretation of the ENSO signal embedded in the stable isotopic composition of Quelccaya Ice Cap, Peru. J. Geophys. Res., 124, 131-145, doi:10.1029/2018JD029064.
  • Hardy, S.P., D.R. Hardy, and K. Castañeda Gil (2018): Avian nesting and roosting on glaciers at high elevation, Cordillera Vilcanota, Peru. The Wilson Journal of Ornithology, v. 130(4), 940–957. https://doi.org/10.1676/1559-4491.130.4.940 >> VIEW > SI & images
  • Yarleque, C., M. Vuille, D.R. Hardy, O. Elison Timm, J. de la Cruz, H. Ramos and A. Rabatel (2018): Projections of the future disappearance of the Quelccaya Ice Cap in the Central Andes. Sci. Rep. 8:15565, doi:10.1038/s41598-018-33698-z.
  • Bohleber, P., L. Sold, D.R. Hardy, M. Schwikowski, P. Klenk, A. Fischer, P. Sirguey, N.J. Cullen, M. Potocki, H. Hoffmann, and P. Mayewski (2017): Ground-penetrating radar reveals ice thickness and undisturbed englacial layers at Kilimanjaro’s Northern Ice Field. The Cryosphere, 11, 469–482. doi:10.5194/tc-11-469-2017 >> VIEW
  • Hurley, J. V., M. Vuille, and D.R. Hardy (2016): Forward modelling of ????18O in Andean ice cores, Geophys. Res. Lett., 43, 8178–8188, doi:10.1002/2016GL070150.
  • Yarleque, C., M. Vuille, D.R. Hardy, A. Posadas, and R. Quiroz (2016): Multiscale assessment of spatial precipitation variability over complex mountain terrain using a high-resolution spatiotemporal wavelet reconstruction method, J. Geophys. Res. Atmos., 121, 12,198–12,216, doi:10.1002/2016JD025647.
  • Appelhans, T., E. Mwangomo, D.R. Hardy, A. Hemp, and T. Nauss (2015): Evaluating machine learning approaches for the interpolation of monthly air temperature at Mt. Kilimanjaro, Tanzania. Spatial Statistics. http://dx.doi.org/10.1016/j.spasta.2015.05.008
  • Hurley, J.V., M. Vuille, D.R. Hardy, S. J. Burns, and L.G. Thompson (2015): Cold air incursions, ?18O variability, and monsoon dynamics associated with snow days at Quelccaya Ice Cap, Peru. J. Geophys. Res. Atmos., 120, 7467–7487. doi: 10.1002/2015JD023323.
  • Gabrielli, P., D.R. Hardy, N. Kehrwald, M. Davis, G. Cozzi, C. Turetta, C. Barbante, and L.G. Thompson (2014): Deglaciated areas of Kilimanjaro as a source of volcanic trace elements deposited on the ice cap during the late Holocene. Quaternary Science Reviews vol. 93, p. 1-10. (Invited Review)
  • Pepin, N.C., W.J. Duane, M. Schaefer, G. Pike, and D.R. Hardy (2014): Measuring and modeling the retreat of the summit ice fields on Kilimanjaro, East Africa.. Arctic, Antarctic, and Alpine Research, v. 46, p. 905-917. doi: 10.1657/1938-4246-46.4.905
  • Samuels-Crow, K.E., J. Galewsky, D.R. Hardy, Z.D. Sharp, J. Worden, and C. Braun (2014): Upwind convective influences on the isotopic composition of atmospheric water vapor over the tropical Andes. J. Geophys. Res. Atmos., 119. doi:10.1002/2014JD021487
  • Hardy, S.P. and D.R. Hardy (2013): Cliff swallow. In: Renfrew, R. (ed.) The Second Atlas of Breeding Birds of Vermont. Hanover: Univ. Press of New England. p. 290-291. ISBN 978-1-61168-348-6
  • Mölg, T., N.J. Cullen, D.R. Hardy, G. Kaser, L. Nicholson, R. Prinz, and M. Winkler (2013): East African glacier loss and climate change: Corrections to the UNEP article “Africa without ice and snow”. Letter to the editor, Environmental Development, vol. 6 (1), p. 1-6. doi:10.1016/j.envdev.2013.02.001
  • Hardy, D.R. (2011): High-elevation weather stations on glaciers in the Tropics – 2011 update. In: Tijm-Reijmer, C.H. and J. Oerlemans (eds.) Workshop on the use of automatic measuring systems on glaciers. Extended abstracts and recommendations (Proceedings of a IASC Workshop, 23-26 March 2011, Pontresina (Switzerland), p. 45-48.
  • Hardy, D.R. (2011): Kilimanjaro. In: Singh, V.P., P. Singh, and U.K. Haritashya (eds.) Encyclopedia of Snow, Ice and Glaciers. Dordrecht: Springer, p. 672-679.
  • Hardy, D.R., and S.P. Hardy (2011): Glacier bird of the Andes. In: Singh, V.P., P. Singh, and U.K. Haritashya (eds.), Encyclopedia of Snow, Ice and Glaciers. Dordrecht: Springer, p. 377.
  • Pepin, N.C., W.J. Duane, and D.R. Hardy (2010): The montane circulation on Kilimanjaro, Tanzania and its relevance for the summit ice fields: comparison of surface mountain climate with equivalent reanalysis parameters. Global and Planetary Change, v. 74, p. 61-75, doi:10.1016/j.gloplacha.2010.08.001
  • Kaser, G., T. Mölg, N. J. Cullen, D. R. Hardy, and M. Winkler (2010): Is the decline of ice on Kilimanjaro unprecedented in the Holocene? The Holocene, v. 20, p. 1079-1091, doi:10.1177/0959683610369498
  • Thompson, L.G., H.H. Brecher, E. Mosley-Thompson, D.R. Hardy, and B.G. Mark (2010): Glacier loss on Kilimanjaro is consistent with widespread ice loss in low latitudes. Response to Mölg, T., G. Kaser, and N.J. Cullen, Glacier loss on Kilimanjaro is an exceptional case. Proc. Nat. Acad. Sci., v. 107, E69-E70, doi:10.1073/pnas.1001999107
  • Winkler, M., G. Kaser, N.J. Cullen, T. Mölg, D.R. Hardy, and W. Tad Pfeffer (2010): Land-based marginal ice cliffs: focus on Kilimanjaro. Erdkunde, v. 64, no. 2, p. 179-193, doi:10.3112/erdkunde.2010.02.05
  • Bradley, R.S., F.T. Keimig, H.F. Diaz, and D.R. Hardy (2009): Recent changes in freezing level heights in the Tropics with implications for the deglacierization of high mountain regions, Geophys. Res. Lett., 36, L17701, doi:10.1029/2009GL037712.
  • Mölg, T., N.J. Cullen, D.R. Hardy, M. Winkler, and G. Kaser (2009): Quantifying climate change in the tropical midtroposphere over East Africa from glacier shrinkage on Kilimanjaro. Journal of Climate, v. 22, p. 4162-4181. doi:10.1175/2009JCLI2954.1
  • Thompson, L.G., H.H. Brecher, E. Mosley-Thompson, D.R. Hardy, and B.G. Mark (2009): Glacier loss on Kilimanjaro continues unabated. Proc. Nat. Acad. Sci., v. 106, p. 19770-19775, doi:10.1073/pnas.0906029106
  • Chan, R.Y., M. Vuille, D.R. Hardy, and R.S. Bradley (2008): Intraseasonal precipitation variability on Kilimanjaro and the East African region and its relationship to the large-scale circulation. Theoretical and Applied Climatology, v. 93, p. 149-165, doi:10.1007/s00704-007-0338-9
  • Duane, W.J., N.C. Pepin, M.L. Losleben, and D.R. Hardy (2008): General characteristics of temperature and humidity variability on Kilimanjaro, Tanzania. Arctic, Antarctic, and Alpine Research, v. 40, no. 2, p. 323-334, doi:10.1657/1523-0430(06-127)[DUANE]2.0.CO;2
  • Hardy, D.R., and S.P. Hardy (2008): White-winged Diuca Finch (Diuca speculifera) Nesting on Quelccaya Ice Cap, Peru. Wilson Journal of Ornithology, 120, 613–617, doi:10.1676/06-165.1 >> VIEW
  • Mölg, T., D.R. Hardy, N.J. Cullen, and G. Kaser (2008): Tropical glaciers, climate change, and society: Focus on Kilimanjaro (East Africa). In: Orlove, B., E. Wiegandt, and B. Luckman (eds.): Darkening Peaks: Glacier Retreat, Science, and Society. California University Press: Berkley, London. p. 168-182.
  • Mölg, T., N.J. Cullen, D.R. Hardy, G. Kaser, and L. Klok (2008): Mass balance of a slope glacier on Kilimanjaro and its sensitivity to climate. International Journal of Climatology, v. 28, p. 881-892.
  • Hardy, D.R. (2007): Snow and Ice on Kilimanjaro. Ice and Climate, WCRP/SCAR Climate and Cryosphere Newsletter. CliC Int. Project Office, Tromsø, Norway. p. 16.
  • Cullen, N.J., T. Mölg, D.R. Hardy, K. Steffen, and G. Kaser (2007): Energy balance model validation on the top of Kilimanjaro using eddy correlation data. Annals of Glaciology, v. 46, p. 227-233.
  • Cullen, N.J., T. Mölg, G. Kaser, K. Hussein, K. Steffen, and D.R. Hardy (2006): Kilimanjaro Glaciers: Recent areal glacier extent from satellite data and new interpretation of observed 20th century retreat rates. Geophysical Research Letters, v. 33, p. L16502, doi:10.1029/2006GL027084
  • Lewis, T., C. Braun, D.R. Hardy, P. Francus, and R.S. Bradley (2005): An extreme sediment transfer event in a Canadian High Arctic stream. Arctic, Antarctic, and Alpine Research, vol. 37, no. 4, p. 477-482.
  • Braun, C., D.R. Hardy, and R.S. Bradley (2004): Mass balance and area changes of four High Arctic plateau ice caps, 1959-2002. Geografiska Annaler, 86 A (1), p. 43-52.
  • Braun, C., D.R. Hardy, R.S. Bradley, and V. Sahanatien (2004): Mass Balance of the Ward Hunt Ice Rise and Ice Shelf, Ellesmere Island, Nunavut, Canada. J. Geophys. Res. – Atm., 109, D22110, doi:10.1029/2004JD004560.
  • Hardy, D.R., C. Braun, M. Vuille, and R.S. Bradley (2004): High-elevation weather stations on glaciers in the Tropics and High Arctic, in Automatic Weather Stations on Glaciers: Lessons to be learned, extended abstracts. Proceedings of a workshop, 28-31 March 2004, Pontresina (Switzerland). p. 52-55.
  • Kaser, G., D.R. Hardy, T. Mölg, R.S. Bradley, and T.M. Hyera (2004): Modern glacier retreat on Kilimanjaro as evidence of climate change: Observations and facts. International Journal of Climatology, v. 24, p. 329-339, doi: 10.1002/joc.1008
  • Mölg, T. and D.R. Hardy (2004): Ablation and associated energy balance on a horizontal glacier surface on Kilimanjaro. Journal of Geophysical Research – Atmospheres, v. 109, p. D16104, doi:10.1029/2003JD004338
  • Bradley, R.S., M. Vuille, D.R. Hardy, and L.G. Thompson (2003): Low latitude ice cores record Pacific sea surface temperatures. Geophysical Research Letters, 30(4), 1174, doi:10.1029/2002GL016546.
  • Hardy, D.R. (2003): Kilimanjaro snow, in State of the Climate in 2002, edited by A. M. Waple and J. H. Lawrimore, Bulletin of the American Meteorological Society, v. 84, p. S48.
  • Hardy, D.R., M. Vuille, and R.S. Bradley (2003): Variability of snow accumulation and isotopic composition on Nevado Sajama, Bolivia. J. Geophys. Res. – Atm., 108 (D22), 4693, doi: 10.1029/2003JD003623.
  • Mölg, T., D.R. Hardy, and G. Kaser (2003): Solar-radiation-maintained glacier recession on Kilimanjaro drawn from combined ice-radiation geometry modeling. Journal of Geophysical Research – Atmospheres, v. 108 (D23), p. 4731-4741, doi:10.1029/2003JD003546
  • Vuille, M., R.S. Bradley, R. Healy, M. Werner, D.R. Hardy, L.G. Thompson and F. Keimig (2003): Modeling d18O in precipitation over the tropical Americas: 2. Simulation of the stable isotope signal in Andean ice cores. J. Geophys. Res. – Atm., 108 (D6), 4175, doi: 10.1029/2001JD002039.
  • Hardy, D.R. (2002): Eternal ice and snow? In Kilimanjaro: to the roof of Africa, A. Salkeld, National Geographic Society, p. 224-225. (Plain-text version here. Nice reference book; used copies are inexpensive (e.g., for Amazon, click here))
  • Thompson, L.G., E. Mosley-Thompson, M.E. Davis, K.A. Henderson, H. Brecher, V.S. Zagorodnov, P-N. Lin, T. Mashiotta, V.N. Mikhalenko, D.R. Hardy, and J. Beer (2002): Kilimanjaro ice core records: Evidence of Holocene climate change in tropical Africa. Science, v. 298, no. 5593, p. 589-593.  To accompany above: SOM
  • Hardy, D.R., M.W. Williams, and C. Escobar (2001): Near-surface faceted crystals, avalanche dynamics and climate in high-elevation, tropical mountains of Bolivia. Cold Regions Science and Technology, v. 33, p. 291-302. doi:10.1016/S0165-232X(01)00055-6.
  • Braun, C., D.R. Hardy, and R.S. Bradley (2001): Recent recession of a small plateau ice cap, Ellesmere Island, Canada. J. Glaciology correspondence, v. 47, no. 156, p. 154.
  • Vuille, M., D.R. Hardy, C. Braun, F. Keimig and R.S. Bradley (2001): Annual and daily meteorological cycles and atmospheric circulation associated with precipitation events on Sajama Volcano, Bolivia. Ecología en Bolivia – Revista del Instituto de Ecología, v. 35, p. 17-40.
  • Braun, C., D.R. Hardy, R.S. Bradley, and M.J. Retelle (2000): Hydrological and meteorological observations at Lake Tuborg, Ellesmere Island, Nunavut, Canada. Polar Geography, v. 24, p. 83-97.
  • Braun, C., D.R. Hardy, R.S. Bradley, and M.J. Retelle (2000): Streamflow and suspended sediment transport to Lake Sophia, Cornwallis Island, Nunavut, Canada. Arctic, Antarctic and Alpine Research, v. 32, p. 456-465.
  • Hardy, D.R., M. Vuille, C. Braun, F. Keimig, and R.S. Bradley (1998): Annual and daily meteorological cycles at high altitude on a tropical mountain. Bulletin of the American Meteorological Society, v. 79, p. 1899-1913.
  • Vuille, M., D.R. Hardy, R.S. Bradley (1998): The impact of El Nino /La Nina in the region of  Nevado Sajama, Bolivia. In: El Fenomeno de El Nino en Bolivia – evaluacion, balance y perspectivas.  Servicio Nacional de Meteorologia e Hidrologia de Bolivia (SENAMHI), La Paz, Bolivia, 229-247.
  • Vuille, M., D.R. Hardy, C. Braun, F. Keimig and R.S. Bradley (1998): Atmospheric circulation anomalies associated with 1996/97 summer precipitation events on Sajama Ice Cap, Bolivia. J. Geophys. Res. – Atm., v. 103, p. 11,191-11,204.
  • Hardy, D.R. and R.S. Bradley (1997): Climate change in Nunavut. Geoscience Canada, v. 23, p. 217-224.
  • Overpeck, J., K. Hughen, D. Hardy, R. Bradley, R. Case, M. Douglas, B. Finney, K. Gajewski, G. Jacoby, A. Jennings, S. Lamoureux, A. Lasca, G. MacDonald, J. Moore, M. Retelle, S. Smith, A. Wolfe and G. Zielinski (1997): Arctic environmental change of the last four centuries. Science, v. 278, p. 1251-1256.
  • Hardy, D.R. (1996): Climatic influences on streamflow and sediment flux into Lake C2, northern Ellesmere Island, Canada. Journal of Paleolimnology, v. 16, p. 133-149.
  • Hardy, D.R. (1996). Temporal variability of streamflow and suspended sediment transport, northern Ellesmere Island, Canada. In Northern Research Basins Symposium and Workshop, 10th, Svalbard, Procedings, (K. Sand and Å. Killingtveit, eds.) p.124-143.
  • Hardy, D.R., R.S. Bradley & B. Zolitschka (1996): The climatic signal in varved sediments from Lake C2, northern Ellesmere Island, Canada. Journal of Paleolimnology, v. 16, p. 227-238.
  • Bradley, R.S., M.J. Retelle, S.D. Ludlam, D.R. Hardy, B. Zolitschka, & S.F. Lamoureux (1996): The Taconite Inlet Lakes Project: A systems approach to paleoclimatic reconstruction. Journal of Paleolimnology, v. 16, p. 97-110.
  • Hardy, D.R. (1993): Snowmelt-induced slushflows, Ellesmere Island, N.W.T., Canada. In Eastern Snow Conference Proceedings, 50th, Quebec City, Quebec, 1993, p. 423-431.