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Joseph Zehnder

Joseph Zehnder

Chair and Professor, Department of Atmospheric Sciences

JosephZehnder@creighton.edu

402-280-2448

Department of Atmospheric Sciences
Creighton University
2500 California Plaza
Omaha, NE 68178
USA

Titles

  • Chair and Professor, Department of Atmospheric Sciences

Biography

Education:
B.S., Physics, University of Illinois
M.S., Physics, University of Illinois
Ph.D., Meteorology, University of Chicago
NRC Postdoc, NASA Goddard Space Flight Center

Joseph Zehnder is currently Chair and Professor in the Department of Atmospheric Sciences at Creighton University. He is a former professor in the Department of Geography and Department of Mathematics at ASU. Prior to coming to ASU, Dr. Zehnder was posted as an assistant and then associate professor in the Departments of Atmospheric Sciences and Applied Mathematics at the University of Arizona. He is a member of the steering committee for World Meteorological Organization Committee on Tropical Meteorology and Forecasting, co-director of Interdisciplinary Certificate Program in Atmospheric Science at Arizona State University, and was the Co-PI on the EPIC 2001 field experiment.



Research focus includes:
  • large and mesoscale dynamic meteorology with an emphasis on tropical and semi arid subtropical regions
  • urban climate and weather
  • use of remotely sensed data for model initialization and validation

Journal Articles

2010

Grossman-Clarke, S., J. A. Zehnder, T. Loridan and C. B. Grimmond. 2010. Contribution of land use changes to near surface air temperatures during recent summer extreme heat events in the Phoenix metropolitan area. Journal of Applied Meteorology and Climatology 49(8):1649-1664. DOI: 10.1175/2010JAMC2362.1. (link )

2008

Grossman-Clarke, S., Y. Liu, J. A. Zehnder and J. D. Fast. 2008. Simulations of the urban planetary boundary layer in an arid metropolitan area. Journal of Applied Meterology and Climatology 47(3):752-768. (link )

2007

Brazel, A. J., P. Gober, S. J. Lee, S. Grossman-Clarke, J. A. Zehnder, B. C. Hedquist and E. Comparri. 2007. Determinants of changes in the regional urban heat island in metropolitan Phoenix (Arizona, USA) between 1990 and 2004. Climate Research 33(2):171-182. (link )

2006

Zehnder, J. A., L. Zhang, D. Hansford, A. Razdan, N. J. Selover and C. M. Brown. 2006. Using digital cloud photogrammetry to characterize the onset and transition from shallow to deep convection over orography. Monthly Weather Review 134(9):2527-2546.

2005

Grossman-Clarke, S., J. A. Zehnder, W. L. Stefanov, Y. Liu and M. A. Zoldak. 2005. Urban modifications in a mesoscale meteorological model and the effects on surface energetics in an arid metropolitan region. Journal of Applied Meteorology 44(9):1281-1297. (link )

Book Chapters

2011

Grossman-Clarke, S., W. L. Stefanov and J. A. Zehnder. 2011. Urban weather, climate and air quality modeling: Increasing resolution and accuracy using improved landscape characterization. Pp. 305-319 In: Yang, X. ed., Urban Remote Sensing: Monitoring, Synthesis and Modeling in the Urban Environment. John Wiley and Sons Ltd.

2009

Zehnder, J. A. and S. Grossman-Clarke. 2009. Urban meteorological modeling. Pp. 93-108 In: Steinebach, G., S. Guhathakurta and H. Hagen eds., Visualizing Sustainable Planning. Springer.

2006

Grossman-Clarke, S. and J. A. Zehnder. 2006. Urban induced mesoscale circulations in an arid region. Pp. 140-143 Preprints, 6th International Conference on Urban Climate.

Posters

2006

Grimm, N. B., C. L. Redman, J. M. Briggs, C. Gries, M. M. Elser, B. Bolin, J. O. Allen, S. L. Harlan, S. H. Faeth, J. M. Anderies, J. C. Stutz, C. A. Martin, P. K. Westerhoff, R. Arrowsmith, J. A. Zehnder, J. Wu and A. P. Kinzig. 2006. Central Arizona -- Phoenix Long-Term Ecological Research (CAP LTER) Project. Poster presented at the September 20-23 LTER All Scientist Meeting, YMCA of the Rockies, Estes Park, CO.

Grossman-Clarke, S. and J. A. Zehnder. 2006. Testing a planetary boundary layer scheme in MM5 for the Phoenix metropolitan region: Influence of urbanization on weather in the Phoenix metropolitan region. Poster presented at the 19 January 2006 CAP LTER 8th Annual Poster Symposium, Global Institute of Sustainability, Arizona State University, Tempe, AZ. (link )

Hedquist, B. C., E. Comparri, J. A. Zehnder, S. Grossman-Clarke, A. J. Brazel and P. Gober. 2006. Spatial expansion of the greater Phoenix urban heat island (1990-2004). Poster presented at the 19 January 2006 CAP LTER 8th Annual Poster Symposium, Global Institute of Sustainability, Arizona State University, Tempe, AZ. (link )

2005

Gober, P., C. L. Redman, B. L. Shears, L. H. Kuby, J. A. Zehnder and S. Grossman-Clarke. 2005. The International Institute for Sustainability and The Decision Center for a Desert City: Research with a purpose. Poster presented at the February 3, 2005 Annual Meeting of the National Council for Science and the Environment, Washington, DC.

Grossman-Clarke, S., J. A. Zehnder, H. Liu and J. D. Fast. 2005. Testing a planetary boundary layer schema in MMS for the Phoenix metropolitan region. Poster presented at the 19 January 2005 CAP LTER Seventh Annual Poster Symposium. International Institute for Sustainability, Arizona State University, Tempe, Arizona. (link )

McCartney, P. H., R. Quay, C. Gries, R. T. Schroeder, J. Hutchins, M. A. Zoldak, J. A. Zehnder, D. Mason, A. Bagley and B. Griffins. 2005. Integrating urban ecological models. Poster presented at the 19 January 2005 CAP LTER Seventh Annual Poster Symposium. International Institute for Sustainability, Arizona State University, Tempe, Arizona. (link )

2004

Grossman-Clarke, S., J. A. Zehnder, W. L. Stefanov, D. Hope and H. J. Fernando. 2004. Effects of land cover modifications in mesoscale meterological and air quality models in the Phoenix metropolitan area. Poster presented at the 23 February 2004 Sixth Annual CAP LTER Poster Symposium. Center for Environmental Studies, Arizona State University, Tempe, AZ. (link )

2003

Grossman-Clarke, S., J. A. Zehnder and W. L. Stefanov. 2003. Effects of urban land cover modifications in a mesoscale meteorological model on surface temperature and heat fluxes in the Phoenix metropolitan area. Presented at February 19, 2003, CAP LTER Fifth Annual Poster Symposium. Center for Environmental Studies, Arizona State University, Tempe, AZ. (link )

Presentations

2006

Grossman-Clarke, S. and J. A. Zehnder. 2006. Urban induced mesoscale circulations in an arid region. Paper presented June 13, 2006 at the International Conference on Urban Climate, Goteborg, Sweden.

Zehnder, J. A. 2006. Phoenix in the Future: Sustainability in a rapidly urbanizing region. Presented at the February 9, 2006 Phoenix College Library Forum Discussion, Phoenix, AZ.

2005

Grossman-Clarke, S. and J. A. Zehnder. 2005. Remote sensing derived land use/cover data for urban modeling in MM5 and WRF. Paper presented at the September 13-15, 2005 Fifth WRF Land Surface Modeling Workshop, National Center for Atmospheric Research, Boulder, CO.

Guhathakurta, S., S. Gaver, P. Gober, S. Grossman-Clarke and J. A. Zehnder. 2005. The impact of urban heat islands on water use: The case of Phoenix metropolitan area. Presented at the November 11, 2005 North American Meetings of the Regional Science Association International, Las Vegas, NV.

Zehnder, J. A. 2005. Modeling the urban heat island. Presented at the September 29, 2005 Arizona Planning Association Conference, Prescott, AZ.

Zehnder, J. A., S. Grossman-Clarke and S. Guhathakurta. 2005. Implications of urban growth patterns for heat island effects and water use: A case study of Metropolitan Phoenix. Presented at August 5, 2005 Arizona Water Summit, Flagstaff, AZ.

Conference Papers

2004

Grossman-Clarke, S., J. A. Zehnder and W. L. Stefanov. 2004. Urban modifications in a mesoscale meteorological model and the effects on surface energetics in an arid metropolitan region. Vancouver, BC, Canada.

2003

Brazel, A. J., S. Grossman-Clarke, J. A. Zehnder and B. C. Hedquist. 2003. Observations and MM5 simulations of the urban heat island in Phoenix, Arizona, USA with a modified land cover scheme. Lodz, Poland.