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Nicolas Cullen

Position:

Associate Professor

Qualifications:

MSc(Cant), PhD(Colorado)

Office Hours:by email appointment

 


Teaching

ENVI111 Environment and Society
GEOG101 Physical Geography
GEOG282 Climate Change: Present and Future
GEOG290 Field Research Methods
GEOG380 Field Research Studies (Science)
GEOG388 Climate Change: Present and Future
GEOG460 Climatology

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Research Interests

Nicolas' research interests are in all aspects of meteorology and climatology. The study of the atmosphere inevitably involves an understanding of other components of the global environment, which for Nicolas has been primarily the cryosphere.  Much of his research has focused on the interactions of the atmosphere with snow and ice surfaces in the high and mid-latitudes, as well as on a number of high mountains in the tropics (e.g. Kilimanjaro). Nicolas is also interested in the impacts of atmospheric processes on human behaviour, in particular air pollution meteorology, utilizing wind for energy through turbine development and issues related to climate change on local to global scales.  The research that Nicolas undertakes is dependent on a combination of field data, remote sensing observations and modelling.

The following outlines the main research projects Nicolas is presently linked to and how he undertakes this research:

Project: Brewster Glacier, New Zealand: Collaborators: 1. Associate Professor Sean Fitzsimons and Dr. Pascal Sirguey, University of Otago, Dr. Andrew Mackintosh and Dr. Brian Anderson, University of Victoria, 3. Dr. Andrew Lorrey, National Institute of Water and Atmospheric Research. Motivation: Understanding the response of temperate glaciers to climate variability is important in improving our current knowledge of global climate change.  Temperate glaciers, including those in New Zealand, are sensitive indicators of climate change and though their contribution to global sea level rise may not be as significant as cold polar and subpolar glaciers and ice caps in the future their retreat will continue to be an important source of terrestrial water to our oceans.  Though complete loss of all glacial ice in New Zealand would only have a minor impact on global sea level rise, understanding the links between glacier behaviour in the Southern Alps and climate is critical in efforts to unravel past patterns of Southern Hemisphere climate and in developing tools to predict future trends. Research activities: Long term measurements of climate (using automatic weather stations) and mass balance allow energy and mass balance models to be utilized, providing insights into the linkages between glacier variability and atmospheric processes on Brewster Glacier, and the greater Southern Alps. see more...

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Check out Glaciers@Otago 


Postgraduate Student Supervision

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Publications

Jobst, A. M., Kingston, D. G., Cullen, N. J., & Sirguey, P. (2017). Combining thin-plate spline interpolation with a lapse rate model to produce daily air temperature estimates in a data-sparse alpine catchment. International Journal of Climatology, 37(1), 214-229. doi: 10.1002/joc.4699

Bohleber, P., Sold, L., Hardy, D. R., Schwikowski, M., Klenk, P., Fischer, A., Sirguey, P., Cullen, N. J., … Mayewski, P. (2017). Ground-penetrating radar reveals ice thickness and undisturbed englacial layers at Kilimanjaro's Northern Ice Field. Cryosphere, 11, 469-482. doi: 10.5194/tc-11-469-2017

Cullen, N. J., Anderson, B., Sirguey, P., Stumm, D., Mackintosh, A., Conway, J. P., … Fitzsimons, S. J., & Lorrey, A. (2016). An 11-year record of mass balance of Brewster Glacier, New Zealand, determined using a geostatistical approach. Journal of Glaciology. Advance online publication. doi: 10.1017/jog.2016.128

Conway, J. P., & Cullen, N. J. (2016). Cloud effects on surface energy and mass balance in the ablation area of Brewster Glacier, New Zealand. Cryosphere, 10(1), 313-328. doi: 10.5194/tc-10-313-2016

Sirguey, P., Still, H., Cullen, N. J., Dumont, M., Arnaud, Y., & Conway, J. P. (2016). Reconstructing the mass balance of Brewster Glacier, New Zealand, using MODIS-derived glacier-wide albedo. Cryosphere, 10, 2465-2484. doi: 10.5194/tc-2016-98

Chapter in Book - Research

Mölg, T., Hardy, D. R., Cullen, N. J., & Kaser, G. (2008). Tropical glaciers, climate change, and society: Focus on Kilimanjaro (East Africa). In B. Orlove, E. Wiegandt & B. H. Luckman (Eds.), Darkening peaks: Glacier retreat, science, and society. (pp. 168-182). Berkeley, CA: University of California Press.

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Journal - Research Article

Jobst, A. M., Kingston, D. G., Cullen, N. J., & Sirguey, P. (2017). Combining thin-plate spline interpolation with a lapse rate model to produce daily air temperature estimates in a data-sparse alpine catchment. International Journal of Climatology, 37(1), 214-229. doi: 10.1002/joc.4699

Bohleber, P., Sold, L., Hardy, D. R., Schwikowski, M., Klenk, P., Fischer, A., Sirguey, P., Cullen, N. J., … Mayewski, P. (2017). Ground-penetrating radar reveals ice thickness and undisturbed englacial layers at Kilimanjaro's Northern Ice Field. Cryosphere, 11, 469-482. doi: 10.5194/tc-11-469-2017

Cullen, N. J., Anderson, B., Sirguey, P., Stumm, D., Mackintosh, A., Conway, J. P., … Fitzsimons, S. J., & Lorrey, A. (2016). An 11-year record of mass balance of Brewster Glacier, New Zealand, determined using a geostatistical approach. Journal of Glaciology. Advance online publication. doi: 10.1017/jog.2016.128

Sirguey, P., Still, H., Cullen, N. J., Dumont, M., Arnaud, Y., & Conway, J. P. (2016). Reconstructing the mass balance of Brewster Glacier, New Zealand, using MODIS-derived glacier-wide albedo. Cryosphere, 10, 2465-2484. doi: 10.5194/tc-2016-98

Conway, J. P., & Cullen, N. J. (2016). Cloud effects on surface energy and mass balance in the ablation area of Brewster Glacier, New Zealand. Cryosphere, 10(1), 313-328. doi: 10.5194/tc-10-313-2016

Gibson, P. B., & Cullen, N. J. (2015). Synoptic and sub-synoptic circulation effects on wind resource variability: A case study from a coastal terrain setting in New Zealand. Renewable Energy, 78, 253-263. doi: 10.1016/j.renene.2015.01.004

Oliphant, A. J., Hindmarsh, R. C. A., Cullen, N. J., & Lawson, W. (2015). Microclimate and mass fluxes of debris-laden ice surfaces in Taylor Valley, Antarctica. Antarctic Science, 27(1), 85-100. doi: 10.1017/S0954102014000534

Conway, J. P., Cullen, N. J., Spronken-Smith, R. A., & Fitzsimons, S. J. (2015). All-sky radiation over a glacier surface in the Southern Alps of New Zealand: Characterizing cloud effects on incoming shortwave, longwave and net radiation. International Journal of Climatology, 35(5), 699-713. doi: 10.1002/joc.4014

Cullen, N. J., & Conway, J. P. (2015). A 22 month record of surface meteorology and energy balance from the ablation zone of Brewster Glacier, New Zealand. Journal of Glaciology, 61(229), 931-946. doi: 10.3189/2015JoG15J004

Gibson, P. B., & Cullen, N. J. (2015). Regional variability in New Zealand's wind resource linked to synoptic-scale circulation: Implications for generation reliability. Journal of Applied Meteorology & Climatology, 54(5), 944-958. doi: 10.1175/JAMC-D-14-0273.1

Sirguey, P., & Cullen, N. J. (2014). A very high resolution DEM of Kilimanjaro via photogrammetry of Geoeye-1 images (Kilisosdem2012). New Zealand Surveyor, 303, 19-25.

Cullen, N. J., Mölg, T., Conway, J., & Steffen, K. (2014). Assessing the role of sublimation in the dry snow zone of the Greenland ice sheet in a warming world. Journal of Geophysical Research: Atmospheres, 119(11), 6563-6577. doi: 10.1002/2014JD021557

Pfeffer, W. T., Arendt, A. A., Bliss, A., Bolch, T., Cogley, J. G., Gardner, A. S., … The Randolph Consortium, including Cullen, N. J., & Sirguey, P. (2014). The Randolph Glacier Inventory: A globally complete inventory of glaciers. Journal of Glaciology, 60(221), 537-552. doi: 10.3189/2014joG13J176

Cullen, N. J., Sirguey, P., Mölg, T., Kaser, G., Winkler, M., & Fitzsimons, S. J. (2013). A century of ice retreat on Kilimanjaro: The mapping reloaded. Cryosphere, 7(2), 419-431. doi: 10.5194/tc-7-419-2013

Conway, J. P., & Cullen, N. J. (2013). Constraining turbulent heat flux parameterization over a temperate maritime glacier in New Zealand. Annals of Glaciology, 54(63), 41-51. doi: 10.3189/2013AoG63A604

Cullen, N. J., Conway, J., Zawar-Reza, P., & Spronken-Smith, R. A. (2012). Further assessment of the atmospheric controls on night-time air pollution dispersion in Alexandra, Central Otago, New Zealand from idealized modelling experiments. Air Quality & Climate Change, 46(1), 29-36.

Cullen, N., Bowden, A., & Spronken-Smith, R. (2012). Partnering between a geography department and a community initiative to provide a wind resource assessment for the Blueskin Bay region, Otago, New Zealand. New Zealand Geographer, 68(1), 49-61. doi: 10.1111/j.1745-7939.2012.01220.x

Gillett, S., & Cullen, N. J. (2011). Atmospheric controls on summer ablation over Brewster Glacier, New Zealand. International Journal of Climatology, 31, 2033-2048. doi: 10.1002/joc.2216

Clark, M., Hendrikx, J., Slater, A. G., Kavetski, D., Anderson, B., Cullen, N. J., … Woods, R. A. (2011). Representing spatial variability of snow water equivalent in hydrologic and land-surface models: A review. Water Resources Research, 47, W07539. doi: 10.1029/2011wr010745

Tate, A., Cullen, N. J., & Spronken-Smith, R. (2011). Wintertime PM10 measurements and modelling in Alexandra, Central Otago, New Zealand: Understanding the bi-modal peak in evening air pollution. Air Quality & Climate Change, 45(3), 19-25.

Broadbent, A., Cullen, N. J., & Zawar-Reza, P. (2010). Wintertime numerical modelling of PM10 air pollution in Milton, Otago, New Zealand: Boundary layer structure, effects of data assimilation, and reaching national environmental standards. Air Quality & Climate Change, 44(4), 22-28.

Kaser, G., Mölg, T., Cullen, N. J., Hardy, D. R., & Winkler, M. (2010). Is the decline of ice on Kilimanjaro unprecedented in the Holocene? Holocene, 20(7), 1079-1091. doi: 10.1177/0959683610369498

Winkler, M., Kaser, G., Cullen, N. J., Mölg, T., Hardy, D. R., & Pfeffer, W. T. (2010). Land-based marginal ice cliffs: Focus on Kilimanjaro. Erdkunde, 64(2), 179-193. doi: 10.3112/erdkunde.2010.02.05

Mölg, T., Cullen, N. J., Hardy, D. R., Winkler, M., & Kaser, G. (2009). Quantifying climate change in the tropical midtroposphere over East Africa from glacier shrinkage on Kilimanjaro. Journal of Climate, 22(15), 4162-4181. doi: 10.1175/2009jcli2954.1

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