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Fluid Dynamics • Cryosphere • The Moon • Mars • Ceres & Asteroids • Book

Fluid Dynamics
  1. N. Schorghofer, L.P. Kadanoff, D. Lohse. How the viscous subrange determines inertial range properties in turbulence shell models. Physica D 88, 40-54 (1995).
  2. N. Schorghofer and T. Zhou. Inelastic collapse of rotating spheres. Physical Review E 54, 5511-5515 (1996).
  3. L.P. Kadanoff, D. Lohse, N. Schorghofer. Scaling and linear response in the GOY turbulence model. Physica D 100, 165-186 (1997).
  4. P. Constantin, Q. Nie, N. Schorghofer. Nonsingular surface quasi-geostrophic flow. Physics Letters A 241, 168-172 (1998).
  5. N. Schorghofer. Equipartition in a model of turbulence. European Physical Journal direct B 1, 1-5 (1998).
  6. P. Constantin, Q. Nie, N. Schorghofer. Front formation in an active scalar equation. Physical Review E 60, 2858-2863 (1999).
  7. N. Schorghofer. Universality of probability distributions among two-dimensional turbulent flows. Physical Review E 61, 6568-6571 (2000).
  8. N. Schorghofer. Energy spectra of steady two-dimensional turbulent flows. Physical Review E 61, 6572-6577 (2000).
  9. Y. Huang, N. Schorghofer, E.S.C. Ching. Two vortex rings produce chaos. Europhysics Letters 52, 399-405 (2000).
  10. E.S.C. Ching, Y.N. Huang, N. Schorghofer. Regular and chaotic streamlines of two vortex rings. Fluid Dynamics Research 29, 295-311 (2001).
  11. N. Schorghofer and D.H. Rothman. Basins of attraction on random topography. Physical Review E 63, 026112 (2001).
  12. N. Schorghofer and S.T. Gille. Statistics of velocity gradients in two-dimensional Navier-Stokes and ocean turbulence. Physical Review E 65, 026307 (2002).
  13. N. Schorghofer and D.H. Rothman. Acausal relations between topographic slope and drainage area. Geophysical Research Letters 29(13), 1633 (2002).
  14. N. Schorghofer, W. Jensen, A. Kudrolli, D.H. Rothman. Spontaneous channelization in permeable ground: theory, experiment, and observation. Journal of Fluid Mechanics 503, 357-374 (2004).
  15. N. Schorghofer. Expressions for tidal conversion at seafloor topography using physical-space integrals. Fluid Dynamics Research 42, 065503 (2010).

Terrestrial Cyrosphere
  1. N. Schorghofer. A physical mechanism for long-term survival of ground ice in Beacon Valley, Antarctica. Geophysical Research Letters 32(19), L19503 (2005).
  2. N. Schorghofer. Buffering of sublimation loss of subsurface ice by percolating snowmelt: a theoretical analysis. (short communication) Permafrost and Periglacial Processes 20, 309-313 (2009).
  3. N. Schorghofer, E. Kantar, P.M. Nogelmeier. Snow on the summits of Hawaiʻi Island: Historical Sources from 1778 to 1870. Hawaiian Journal of History 48, 89-113 (2014).
  4. A. Pflitsch, N. Schörghofer, S.M. Smith, D. Holmgren. Massive ice loss from the Mauna Loa Icecave, Hawaii. Arctic, Antarctic, and Alpine Research 48, 33-43 (2016).
  5. M. Leopold, A. Morelli, N. Schorghofer. Subsurface architecture of two tropical alpine desert cinder cones that hold water. Journal of Geophysical Research 121, 1148-1160 (2016).
  6. N. Schorghofer, M. Leopold, K. Yoshikawa. State of high-altitude permafrost on tropical Maunakea volcano, Hawaii. Permafrost and Periglacial Processes 28, 685-697 (2017).
  7. K.B. Teehera, S.P. Jungbluth, B.P. Onac, T.E. Acosta-Maeda, E. Hellebrand, A.K. Misra, A. Pflitsch, M.S. Rappe, S.M. Smith, M. Telus, N. Schorghofer. Cryogenic minerals in Hawaiian lava tubes: A geochemical and microbiological exploration. Geomicrobiology Journal 35, 227-241 (2018).
  8. N. Schörghofer, S. Businger, M. Leopold. The coldest places in Hawaii: The ice-preserving microclimates of high-altitude craters and caves on tropical island volcanoes. Bulletin of the American Meteorological Society 99(11), 2313-2324 (2018).
  9. N. Schorghofer. "Permafrost Survey on the Maunakea Summit Plateau." Final Report prepared for the Office of Maunakea Management and the Hawaii Department of Land and Natural Resources, 28pp (2018).
  10. J. Martin, N. Schorghofer, K. Yoshikawa, F.L. Klasner. Snow cover in Hawaii (1893-1953) and its effect on ground temperature. Arctic, Antarctic, and Alpine Research 51, 148-154 (2019).
  11. V.H. Soto, K. Yoshikawa, N. Schörghofer. Climatic variation in the high-mountains of central Mexico: Temperature and precipitation indices at Nevado de Toluca volcano. Atmósfera 33, 301-318 (2020).
  12. G. Mena, K. Yoshikawa, N. Schorghofer, C. Pastén, F.A. Ochoa; Y. Yoshii, M. Doi, T. Miyata, H. Takahashi, G. Casassa, T. Sone. Freeze-thaw cycles and snow impact at arid permafrost region in Chajnantor Volcano Atacama, Northern Chile. Arctic, Antarctic, and Alpine Research 53, 60-66 (short communication) (2021).
  13. N. Schorghofer, M. Leopold, F.L. Klasner. A third pond on the Mauna Kea summit plateau. Pacific Science 76(3), 277-287 (2023).
  14. K. Yoshikawa, N. Schorghofer, F. Klasner. Permafrost and seasonal frost thermal dynamics over fifty years on tropical Maunakea volcano, Hawai'i. Arctic, Antarctic, and Alpine Research 55, 2186485 (2023).

The Moon
  1. N. Schorghofer and G.J. Taylor. Subsurface migration of H2O at lunar cold traps. Journal of Geophysical Research 112(E2), E02010 (2007).
  2. N. Schorghofer and O. Aharonson. The lunar thermal ice pump. Astrophysical Journal 788, 169 (2014).
  3. N. Schorghofer. Migration calculations for water in the exosphere of the Moon: Dusk-dawn asymmetry, heterogeneous trapping, and D/H fractionation. Geophysical Research Letters 41, 4888-4893 (2014).
  4. P. Hayne, A. Ingersoll, D. Paige (eds.) (33 authors). "New Approaches to Lunar Ice Detection and Mapping." Keck Institute for Space Studies (KISS) workshop report (2014).
  5. N. Schorghofer. Two-dimensional description of surface-bounded exospheres with application to the migration of water molecules on the Moon. Physical Review E 91, 052154 (2015).
  6. N. Schorghofer, P. Lucey, J.-P. Williams. Theoretical time variability of mobile water on the Moon and its geographic pattern. Icarus 298, 111-116 (2017).
  7. N. Schorghofer. Lunar Atmosphere, Transport and Storage of Volatiles. In: "Encyclopedia of Lunar Science", (ed.) B. Cudnik. Springer (2017).
  8. J.L. Kloos, J.E. Moores, J. Sangha, T.G. Nguyen, N. Schorghofer. The temporal and geographic extent of seasonal cold trapping on the Moon. Journal of Geophysical Research 124, 1935-1944 (2019).
  9. J.-P. Williams, B.T. Greenhagen, D.A. Paige, N. Schorghofer, E. Sefton-Nash, P.O. Hayne, P.G. Lucey, M.A. Siegler, K.-M. Aye. Seasonal polar temperatures on the Moon. Journal of Geophysical Research 124, 2505-2521 (2019).
  10. L. Rubanenko, N. Schorghofer, B.T. Greenhagen, D.A Paige. Equilibrium temperatures and directional emissivity of sunlit airless surfaces with applications to the Moon. Journal of Geophysical Research 125, e2020JE006377 (2020).
  11. N. Schorghofer and J.-P. Williams. Mapping of ice storage processes on the Moon with time-dependent temperatures. Planetary Science Journal 1, 54 (2020).
  12. P.O. Hayne, O. Aharonson, N. Schorghofer. Micro cold traps on the Moon. Nature Astronomy 5, 169-175 (2021).
  13. N. Schörghofer, M. Benna, A.A. Berezhnoy, B. Greenhagen, B.M. Jones, S. Li, T.M. Orlando, P. Prem, O.J. Tucker, C. Wöhler. Water group exospheres and surface interactions on the Moon, Mercury, and Ceres. Space Science Reviews 217, 74 (2021).
  14. N. Schorghofer, J.-P. Williams, J. Martinez-Camacho, D.A. Paige, M. Siegler. Carbon dioxide cold traps on the Moon. Geophysical Research Letters 48(20), e2021GL095533 (2021).
  15. N. Schorghofer. Gradual sequestration of water at lunar polar conditions due to temperature cycles. Astrophysical Journal Letters 927, L34 (2022).
  16. N. Schorghofer. Statistical thermodynamics of surface-bounded exospheres. Earth, Moon, and Planets 126, 5 (2022).
  17. B. Teolis, M. Sarantos, N. Schorghofer, B. Jones, C. Grava, A. Mura, P. Prem, B. Greenhagen, M. T. Capria, G. Cremonese, A. Lucchetti, V. Galluzzi. Surface exospheric interactions. Space Science Reviews 219, 4 (2023).
  18. S.F. Potter, S. Bertone, N. Schorghofer, E. Mazarico. Fast hierarchical low-rank view factor matrices for thermal irradiance on planetary surfaces. Journal of Computational Physics X 17, 100130 (2023).
  19. N. Schorghofer, R. Ghent, K.-M. Aye. Lunar grain size determination based on surface temperatures using ensembles of thermal model parameters. (short communication) Icarus 407, 115771 (2024)
  20. N. Schorghofer and R. Rufu. Past extent of lunar permanently shadowed areas. Science Advances 9, eadh4302 (2023).
  21. N. Schorghofer. Adsorption kinetics of water and argon on lunar grains. Planetary Science Journal 4, 164 (2023).
  22. N. Schorghofer and J.-P. Williams. Sublimation pressures of common volatiles at low temperature and maps of supervolatile cold traps on the Moon. Icarus 416, 116086 (2024).
  23. N. Schorghofer, J.-P. Williams, E. Mazarico. Lunar north polar cold traps based on diurnally and seasonally varying temperatures. Submitted to Planetary Science Journal (2024).

Mars
  1. O. Aharonson, M.T. Zuber, D.H. Rothman, N. Schorghofer, K.X Whipple. Drainage basins and channel incision on Mars. Proceedings of the National Academy of Sciences USA 99, 1780-1783 (2002).
  2. N. Schorghofer, O. Aharonson, S. Khatiwala. Slope streaks on Mars: Correlations with surface properties and the potential role of water. Geophysical Research Letters 29(23), 2126 (2002).
  3. O. Aharonson, N. Schorghofer, M.F. Gerstell. Slope streak formation and dust deposition rates on Mars. Journal of Geophysical Research 108(E12), 5138 (2003).
  4. M.F. Gerstell, O. Aharonson, N. Schorghofer. A distinct class of avalanche scars on Mars. Icarus 168(1), 122-130 (2004).
  5. N. Schorghofer and O. Aharonson. Stability and exchange of subsurface ice on Mars. Journal of Geophysical Research 110(E5), E05003 (2005).
  6. N. Schorghofer and K.S. Edgett. Seasonal surface frost at low latitudes on Mars. Icarus 180(2), 321-334 (2006).
  7. O. Aharonson and N. Schorghofer. Subsurface ice on Mars with rough topography. Journal of Geophysical Research 111(E11), E11007 (2006).
  8. N. Schorghofer. Theory of ground ice stability in sublimation environments. Physical Review E 75, 041201 (2007).
  9. T.L. Hudson, O. Aharonson, N. Schorghofer, C.B. Farmer, M.H. Hecht, N.T. Bridges. Water vapor diffusion in Mars subsurface environments. Journal of Geophysical Research 112(E5), E05016 (2007).
  10. N. Schorghofer, O. Aharonson, M.F. Gerstell, L. Tatsumi. Three decades of slope streak activity on Mars. Icarus 191(1), 132-140 (2007).
  11. N. Schorghofer. Dynamics of ice ages on Mars. Nature 449(7159), 192-194 (2007).
  12. B. Diez, W.C. Feldman, S. Maurice, O. Gasnault, T.H. Prettyman, M.T. Mellon, O. Aharonson, N. Schorghofer. H layering in the top meter of Mars. Icarus 196(2), 409-421 (2008).
  13. N. Schorghofer. Temperature response of Mars to Milankovitch cycles. Geophysical Research Letters 35, L18201 (2008).
  14. T.L. Hudson, O. Aharonson, N. Schorghofer. Laboratory experiments and models of diffusive emplacement of ground ice on Mars. Journal of Geophysical Research 114, E01002 (2009).
  15. N. Schorghofer. Fast numerical method for growth and retreat of subsurface ice on Mars. Icarus 208, 598-607 (2010).
  16. N. Schorghofer and C.M. King. Sporadic formation of slope streaks on Mars. Icarus 216, 159-168 (2011).
  17. K.L. Wagstaff, J. Panetta, A. Ansar, R. Greeley, M. Pendleton-Hoffer, M. Bunte, N. Schorghofer. Dynamic landmarking for surface feature identification and change detection. ACM Transactions on Intelligent Systems and Technology 3, article no. 49 (2012).
  18. M. Siegler, O. Aharonson, E. Carey, M. Choukroun, T.L. Hudson, N. Schorghofer, S. Xu. Measurements of thermal properties of icy Mars regolith analogs. Journal of Geophysical Research 117, E03001 (2012).
  19. N. Schorghofer and F. Forget. History and anatomy of subsurface ice on Mars. Icarus 220, 1112-1120 (2012).
  20. J.R. Bergonio, K.M. Rottas, N. Schorghofer. Properties of Martian slope streak populations. Icarus 225, 194-199 (2013).
  21. N. Schorghofer. Subsurface air flow on Mars (News & Views). Nature Physics 10, 14-15 (2014).
  22. "Planetary geomorphology image of the month: Slope streaks on Mars", blog entry by N. Schorghofer. Blog by M. Bourke, Feb 2014.
  23. N. Schorghofer. Slope Streak (Mars). In: "Encyclopedia of Planetary Landforms", (eds.) A. Kereszturi and H. Hargitai. Springer (2014) + updated version (2022)
  24. M.A. Kreslavsky, N. Schorghofer, A. Kereszturi. Triangular Scar (Mars). In: "Encyclopedia of Planetary Landforms", (eds.) A. Kereszturi and H. Hargitai. Springer (2014).
  25. F. Forget, S. Byrne, J. Head, M. Mischna, N. Schorghofer. Recent Climate Variations. Chapter 16 in "The Atmosphere and Climate of Mars", (eds.) R.M. Haberle et al., p497-525, Cambridge University Press (2017).
  26. E. Vos, O. Aharonson, N. Schorghofer. Dynamic and isotopic evolution of ice reservoirs on Mars. Icarus 324, 1-7 (2019).
  27. N. Schorghofer, J.S. Levy, T.A. Goudge. High-resolution thermal environment of recurring slope lineae in Palikir Crater, Mars, and its implications for volatiles. Journal of Geophysical Research 124, 2852-2862 (2019).
  28. Planetary geomorphology image of the month: Thermal environment of recurring slope lineae on Mars", blog entry by N. Schorghofer. Blog by Tjalling de Haas, Dec 2019.
  29. M. Tebolt, J.S. Levy, T. Goudge, N. Schorghofer. Slope, elevation, and thermal inertia trends of martian recurring slope lineae initiation and termination points: multiple possible processes occurring on coarse, sandy slopes. Icarus 338, 113536 (2020).
  30. N. Schorghofer. Mars: Quantitative evaluation of crocus melting behind boulders. Astrophysical Journal 890, 49 (2020).
  31. N. Schorghofer. Ice caves on Mars: Hoarfrost and microclimates. Icarus 357, 114271 (2021).
  32. A. Valantinas, P. Becerra, A. Pommerol, L.L. Tornabene, L. Affolter, G. Cremonese, E. Hauber, A.S. McEwen, G. Munaretto, M. Pajola, A. Parkes Bowen, M.R. Patel, V.G. Rangarajan, N. Schorghofer, N. Thomas. Color and multi-angular observations of Martian slope streaks. Planetary and Space Science 209, 105373 (2021).
  33. E. Vos, O. Aharonson, N. Schörghofer, F. Forget, E. Millour, L. Rossi, M. Vals, F. Montmessin. Stratigraphic and isotopic evolution of the Martian polar caps from paleo-climate models. Journal of Geophysical Research: Planets 127, e2021JE007115 (2022).
  34. E. Vos, O. Aharonson, N. Schorghofer, F. Forget, E. Millour. Paleo-evolution of martian subsurface ice and its role in the polar physical and isotopic layering. Journal of Geophysical Research: Planets 128, e2023JE007822 (2023).
  35. E. David, O. Aharonson, E. Vos, F. Forget, N. Schörghofer. The effect of ground ice redistribution on the martian paleo-CO2 cycle. Submitted to Journal of Geophysical Research (2024).

Ceres and asteroids
  1. N. Schorghofer. The lifetime of ice on main belt asteroids. Astrophysical Journal 682, 697-705 (2008).
  2. H.H. Hsieh, L. Denneau, R.J. Wainscoat, et al. The main-belt comets: The Pan-STARRS1 perspective. Icarus 248, 289-312 (2015).
  3. N. Schorghofer. Predictions of depth-to-ice on asteroids based on an asynchronous model of temperature, impact stirring, and ice loss. Icarus 276, 88-95 (2016).
  4. N. Schorghofer, E. Mazarico, T. Platz, F. Preusker, S.E. Schröder, C.A. Raymond, C.T. Russell. The permanently shadowed regions of dwarf planet Ceres. Geophysical Research Letters 43, 6783-6789 (2016).
  5. D.L. Buczkowski, B.E. Schmidt, D.A. Williams, et al. The geomorphology of Ceres. Science 353, 1004 (2016).
  6. T. Platz, A. Nathues, N. Schorghofer, et al. Surface water-ice deposits in the northern shadowed regions of Ceres. Nature Astronomy 1, 0007 (2017).
  7. T.H. Prettyman, N. Yamashita, M.J. Toplis, H.Y. McSween, N. Schörghofer, et al. Extensive water ice within Ceres' aqueously altered regolith: Evidence from nuclear spectroscopy. Science 355, 55-59 (2017).
  8. A.I. Ermakov, E. Mazarico, S.E. Schröder, et al. Ceres's obliquity history and implications for the permanently shadowed regions. Geophysical Research Letters 44, 2652-2661 (2017).
  9. B.E. Schmidt, K.H.G. Hughson, H.T. Chilton, et al. Geomorphological evidence for ground ice on dwarf planet Ceres. Nature Geoscience 10, 338-343 (2017).
  10. H.G. Sizemore, T. Platz, N. Schorghofer, et al. Pitted terrain on dwarf planet Ceres and implications for volatiles. Geophysical Research Letters 44, 6570-6578 (2017).
  11. M.E. Landis, S. Byrne, N. Schorghofer, et al. Conditions for sublimating water ice to supply Ceres’ exosphere. Journal of Geophysical Research 122, 1984-1995 (2017).
  12. N. Schorghofer, S. Byrne, M.E. Landis, E. Mazarico, T.H. Prettyman, B.E. Schmidt, M.N. Villarreal, J. Castillo-Rogez, C.A. Raymond, C.T. Russell. The putative cerean exosphere. Astrophysical Journal 850, 85 (2017).
  13. M. Micheli, D. Farnocchia, K.J. Meech, et al. Non-gravitational acceleration in the trajectory of 1I/2017 U1 ('Oumuamua). Nature 559, 223-226 (2018).
  14. N. Schörghofer and H.H. Hsieh. Ice loss from the interior of small airless bodies according to an idealized model. Journal of Geophysical Research 123, 2322-2335 (2018).
  15. J.-P. Combe, A. Raponi, F. Tosi, et al. Exposed H2O-rich areas detected on Ceres with the Dawn Visible and InfraRed mapping spectrometer. Icarus 318, 22-41 (2019).
  16. T.H. Prettyman, N. Yamashita, E. Ammannito, et al. Elemental composition and mineralogy of Vesta and Ceres: Distribution and origins of hydrogen-bearing species. Icarus 318, 42-55 (2019).
  17. J.-Y. Li, S.E. Schröder, S. Mottola, et al. Spectrophotometric modeling and mapping of Ceres. Icarus 322, 144-167 (2019).
  18. M.E. Landis, S. Byrne, S. Marchie, et al. Water vapor contribution to Ceres' exosphere from observed surface ice and postulated ice-exposing impacts. Journal of Geophysical Research 124, 61-75 (2019).
  19. H. Sizemore, B.E. Schmidt, D.A. Buczkowski, et al. A global inventory of ice-related morphological features on dwarf planet Ceres: Implications for the evolution and current state of the cryosphere. Journal of Geophysical Research 124, 1650-1689 (2019).
  20. H.T. Chilton, B.E. Schmidt, K. Duarte, et al. Landslides on Ceres: Inferences into ice content and layering in the upper crust. Journal of Geophysical Research 124, 1512-1524 (2019).
  21. H.H. Hsieh, B. Novakovic, K.J. Walsh, N. Schorghofer. Potential Themis family asteroid contributions to the Jupiter-Family Comet population. Astronomical Journal 159, 179 (2020).
  22. N. Schorghofer, H.H. Hsieh, B. Novakovic, K.J. Walsh. Preservation of polar ice on near-Earth asteroids originating in the outer main belt: A model study with dynamical trajectories. Icarus 348, 113865 (2020).
  23. P. Pokorny, E. Mazarico, N. Schorghofer. Erosion of volatiles by micro-meteoroid bombardment on Ceres, and comparison to the Moon and Mercury. Planetary Science Journal 2, 85 (2021).
  24. T.H. Prettyman, N. Yamashita, M.E. Landis, et al. Replenishment of near-surface water ice by impacts into Ceres' volatile-rich crust: Observations by Dawn's Gamma Ray and Neutron Detector. Geophysical Research Letters 48, e2021GL094223 (2021).
  25. N. Schorghofer, R. Gaskell, E. Mazarico, J. Weirich. History of Ceres's cold traps based on refined shape models. Planetary Science Journal 5, 99 (2024).
  26. N. Schörghofer and S. Khatiwala. Semi-implicit solver for the heat equation with Stefan-Boltzmann Law boundary condition. Planetary Science Journal, in press (2024).
  27. S. Schröder, N. Schörghofer, E. Mazarico, U. Carsenty. Spectral properties of bright deposits in permanently shadowed craters on Ceres. Submitted to Astronomy & Astrophysics (2024).
Research in the News

Book

  1. N. Schörghofer. "Lessons in Scientific Computing: Numerical Mathematics, Computer Technology, and Scientific Discovery." Taylor & Francis / CRC Press / Routledge (2018).

For papers that are not readily available online, please email me at norbert -at- psi.edu or request the paper on ResearchGate.net