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Department of Physics

Gerrard, Andrew J.

Contact Info
Title: Professor
Email: andrew.j.gerrard@njit.edu
Office: 101 Tiernan
Phone: 973-596-3360
Dept: Physics
Webpage: http://web.njit.edu/~gerrard

Courses I Teach

EARTH IN SPACE
INDEPENDENT STUDY
DOCT DISSERTATION & RES
DOCT DISSERTATION & RES
DOCT DISSERTATION & RES
DOCT DISSERTATION & RES

Research Interests

Gerrard’s research interests involve the investigation of the transfer of energy into, and subsequent synoptic effects within, the earth’s upper atmosphere.  Though it is well understood that the upper atmosphere receives substantial amounts of energy from the sun and magnetosphere (i.e., energy from “above” the upper atmosphere), the physical mechanisms associated with this energy input are unclear.  Furthermore, the nature and amount of energy injected into the upper atmosphere from lower altitudes (i.e., energy from the lower and middle atmosphere) is still uncertain and potentially significant.  As such, Gerrard has been very active in bringing together both modeling and experimental techniques to address the injection of energy into the upper atmosphere, and CSTR is one of a few research centers in the world capable of covering experimental investigations ranging from the sun’s surface all the way to Earth’s surface.


Selected Publications

Frissell, N. A., J. B. H. Baker, J. M. Ruohoniemi, A. J. Gerrard, E. S. Miller, J. P. Marini, M. L. West, and W. A. Bristow (2014), Climatology of medium-scale traveling ionospheric disturbances observed by the midlatitude Blackstone SuperDARN radar, J. Geophys. Res. Space Physics, 119, 7679–7697, doi:10.1002/2014JA019870.Makela, J. J., B. J. Harding, J. W. Meriwether, R. Mesquita, S. Sanders, A. J. Ridley, M. W. Castellez, Ciocca, G. D. Earle, N. A. Frissell, D. L. Hampton, A. J. Gerrard, J. Noto and C. R. Martinis (2014), Storm time response of the midlatitude thermosphere: Observations from a network of Fabry-Perot interferometers, J. Geophys. Res. Space Physics, 119, 6758–6773, doi:10.1002/2014JA019832.Melville, R., A. Stillinger, A. Gerrard, A. Weatherwax (2014), Sustainable energy at the 100-W level for scientific sites on the Antarctic Plateau: Lessons learned from the PENGUIn-AGO project, Review of Scientific Instruments, 85, 4, id.045117.Gerrard, A., L. Lanzerotti, M. Gkioulidou, D. Mitchell, J. Manweiler, and J. Bortnik (2014), Quiet time observations of He ions in the inner magnetosphere as observed from the RBSPICE instrument aboard the Van Allen Probes mission, Geophys. Res. Lett., 41, doi:10.1002/2013GL059175.Earle, G. D., R. L. Davidson, R. A. Heelis, W. R. Coley, D. R. Weimer, J. J. Makela, D. J. Fisher, A. J. Gerrard, J. Meriwether (2013), Low latitude thermospheric responses to magnetic storms, DOI: 10.1002/jgra.50212.Li, Z., S. Naqvi , A. J. Gerrard, J. L. Chau, and Y. Bhattacharya (2012), Initial MST radar observations of upper tropospheric-lower stratospheric duct-like structures over Jicamarca, Peru, Atmos. Chem. Phys., 12, 11085–11093, doi:10.5194/acp-12-11085-2012.Gerrard, A. J. and Meriwether, J. W.: Initial daytime and nighttime SOFDI observations of thermospheric winds from Fabry-Perot Doppler shift measurements of the 630-nm OI line-shape profile (2011), Ann. Geophys., 29, 1529-1536, doi:10.5194/angeo-29-1529-2011.Urban, K. D., A. J. Gerrard, Y. Bhattacharya, A. J. Ridley, L. J. Lanzerotti, and A. T. Weatherwax (2011), Quiet time observations of the open-closed boundary prior to the CIR-induced storm of 9 August 2008, Space Weather, 9, S11001, doi:10.1029/2011SW000688.Gerrard, A. J., Y. Bhattacharya, and J. P. Thayer (2011), Observations of in-situ generated gravity waves during a stratospheric temperature enhancement (STE) event, Atmos. Chem. Phys., 11, 22, pp.11913-11917, doi: 10.5194/acp-11-11913-2011.Gerrard, A. J., Y. Bhattacharya, and J. P. Thayer (2011), Observations of in-situ generated gravity waves during a stratospheric temperature enhancement (STE) event, Atmos. Chem. Phys. Discuss., 11, 14221-14232, doi:10.5194/acpd-11-14221-2011.Li, Z., S. Naqvi, A. J. Gerrard, J. L. Chau, and Y. Bhattacharya (2011), Numerical modeling of lower stratospheric Doppler ducted gravity waves over Jicamarca, Peru, Atmos. Chem. Phys. Discuss., 11, 19011-19027, doi:10.5194/acpd-11-19011-2011.Bhattacharya, Y., and A. J. Gerrard (2010), Wintertime mesopause region vertical winds from Resolute Bay, J. Geophys. Res., 115, D00N07, doi:10.1029/2010JD014113.Gerrard, A. J., D. Detrick, S. Mende, L. J. Lanzerotti, A. T. Weatherwax, and Y. Bhattacharya (2010), Photometric observations of 630.0-nm OI and 427.8-nm N2+ emission from South Pole and McMurdo Stations during winter: Analysis of temporal variations spanning minutes to hourly timescales, J. Geophys. Res., Vol. 115, No. A8, A08231, 10.1029/2009JA014970.

Professional Review Papers

Meriwether, J. W., and A. J. Gerrard, Mesosphere inversion layers and stratosphere temperature enhancements, Rev. Geophys., 42, RG3003, doi:10.1029/2003RG000133, 2004.Peer-Reviewed Papers Appearing in Books

Gerrard, A. J., T. J. Kane, and J. P. Thayer, Year-round temperature and wave measurements of the Arctic middle atmosphere for 1995-1998, Atmospheric Science Across the Stratopause, D. E. Siskind, S. D. Eckermann, and M. E. Summers, Eds., Geophysical Monograph Series 123, American Geophysical Union, Washington, D.C., 2000.Professional (Peer-Reviewed) Journal Publications

Brown, L. B., A. J. Gerrard, J. W. Meriwether, and J. J. Makela, All-sky imaging observations of mesospheric fronts in OI 557.7 nm and broadband OH airglow emissions: Analysis of frontal structure, atmospheric background conditions, and potential sourcing mechanisms, J. Geophys. Res., 109, D19104, doi:10.1029/2003JD004223, 2004.Gerrard, A. J., T. J. Kane, S. D. Eckermann, and J. P. Thayer, Gravity waves and mesospheric clouds in the summer middle atmosphere: A comparison of lidar measurements and ray modeling of gravity waves over Sondrestrom, Greenland, J. Geophys. Res., 109(D10), D1010310.1029/2002JD002783, 2004.Gerrard, A. J., T. J. Kane, J. P. Thayer, and S. D. Eckermann, Concerning the upper stratospheric gravity wave and mesospheric cloud relationship over Sondrestrom, Greenland, J. Atmos. Solar-Terr.Phys., 66, 229-240, 2004.Thayer, J. P., M. Rapp, A. J. Gerrard, E. Gudmundsson, T. J. Kane, Gravity-wave influences on Arctic mesospheric clouds as determined by a Rayleigh lidar at Sondrestrom, Greenland, J. Geophys. Res., 108(D8), 8449, doi:10.1029/2002JD002363, 2003.Collins, S. C., J. M. C. Plane, M. C. Kelley, T. G. Wright, P. Soldán, R. J. Rollason, T. J. Kane, A. J. Gerrard, B. W. Grime, J. S. Friedman, S. A. González, Q. Zhou, and M. P. Sulzer, A study of the role of ion-molecule chemistry in the formation of sporadic sodium layers, J. Atmos. Solar-Terr. Physics, 64, 7, 845-860, 2002.Gerrard, A. J., T. J. Kane, J. P. Thayer, T. J. Duck, J. A. Whiteway, and J. Fiedler, Synoptic-scale study of the Arctic polar vortex’s influence on the middle atmosphere: I. Observations, J. Geophys. Res., 107(D16), 4276, doi: 10.1029/2001JD000681, 2002.Gerrard, A. J., T. J. Kane, J. P. Thayer, C. S. Ruf, and R. L. Collins, Consideration of non-Poisson distributions for Lidar applications, App. Optics, 40, 1488-1492, 2001.Gerrard, A. J., T. J. Kane, and J. P. Thayer, Noctilucent clouds and wave dynamics: Observations at Sondrestrom, Greenland, Geophys. Res. Lett., 25, 2817-2820, 1998.Gerrard, A. J., T. J. Kane, D. D. Meisel, J. P. Thayer, and R. B. Kerr, Investigation of a resonance lidar for measurement of thermospheric metastable helium, J. Atmos. Solar-Terr. Phys., 59, 2023-2035, 1997.Other (Peer-Reviewed) Publications

Kane, T. J., A. J. Gerrard, A. Hassiotis, Global forecasts of thermospheric gravity wave activity as generated from tropospheric sources: An overview of the FOREGRATS model with application to the prediction of equatorial spread-F, 85th AMS Annual Meeting, 9–13 January 2005, San Diego, California.Gerrard, A. J., Future CEDAR Lidar-Science Challenges, contribution to: CEDAR LIDAR BEYOND PHASE III; ACCOMPLISHMENTS, REQUIREMENTS AND GOALS, A self-assessment by the CEDAR lidar community for the National Science Foundation, R. L. Collins, ed., November 2003.Gerrard, A. J., J. P. Thayer, and T. J. Kane, Mesospheric clouds and the duality of gravity waves, Eos Transactions of the American Geophysical Union, 83(43), 488, 2002.Gerrard, A. J., Synoptic-scale Variability of Arctic Gravity Wave Activity During Summer and the Potential Impacts on the High Latitude Middle Atmosphere, Ph.D. Thesis, The Pennsylvania State University, 183 pp, 2002.Gerrard, A. J., C. M. Gerrard, M. A. London, K. A. Soldavin, T. J. Kane, and A. Freed, The Groundhog Oscillation (GO): Further Evidence For Global Change, Annals of Improbable Research, 7, Jan-Feb, 2001.

Frissell, N. A., J. B. H. Baker, J. M. Ruohoniemi, A. J. Gerrard, E. S. Miller, J. P. Marini, M. L. West, and W. A. Bristow (2014), Climatology of medium-scale traveling ionospheric disturbances observed by the midlatitude Blackstone SuperDARN radar, J. Geophys. Res. Space Physics, 119, 7679–7697, doi:10.1002/2014JA019870.Makela, J. J., B. J. Harding, J. W. Meriwether, R. Mesquita, S. Sanders, A. J. Ridley, M. W. Castellez, Ciocca, G. D. Earle, N. A. Frissell, D. L. Hampton, A. J. Gerrard, J. Noto and C. R. Martinis (2014), Storm time response of the midlatitude thermosphere: Observations from a network of Fabry-Perot interferometers, J. Geophys. Res. Space Physics, 119, 6758–6773, doi:10.1002/2014JA019832.Melville, R., A. Stillinger, A. Gerrard, A. Weatherwax (2014), Sustainable energy at the 100-W level for scientific sites on the Antarctic Plateau: Lessons learned from the PENGUIn-AGO project, Review of Scientific Instruments, 85, 4, id.045117.Gerrard, A., L. Lanzerotti, M. Gkioulidou, D. Mitchell, J. Manweiler, and J. Bortnik (2014), Quiet time observations of He ions in the inner magnetosphere as observed from the RBSPICE instrument aboard the Van Allen Probes mission, Geophys. Res. Lett., 41, doi:10.1002/2013GL059175.Earle, G. D., R. L. Davidson, R. A. Heelis, W. R. Coley, D. R. Weimer, J. J. Makela, D. J. Fisher, A. J. Gerrard, J. Meriwether (2013), Low latitude thermospheric responses to magnetic storms, DOI: 10.1002/jgra.50212.Li, Z., S. Naqvi , A. J. Gerrard, J. L. Chau, and Y. Bhattacharya (2012), Initial MST radar observations of upper tropospheric-lower stratospheric duct-like structures over Jicamarca, Peru, Atmos. Chem. Phys., 12, 11085–11093, doi:10.5194/acp-12-11085-2012.Gerrard, A. J. and Meriwether, J. W.: Initial daytime and nighttime SOFDI observations of thermospheric winds from Fabry-Perot Doppler shift measurements of the 630-nm OI line-shape profile (2011), Ann. Geophys., 29, 1529-1536, doi:10.5194/angeo-29-1529-2011.Urban, K. D., A. J. Gerrard, Y. Bhattacharya, A. J. Ridley, L. J. Lanzerotti, and A. T. Weatherwax (2011), Quiet time observations of the open-closed boundary prior to the CIR-induced storm of 9 August 2008, Space Weather, 9, S11001, doi:10.1029/2011SW000688.Gerrard, A. J., Y. Bhattacharya, and J. P. Thayer (2011), Observations of in-situ generated gravity waves during a stratospheric temperature enhancement (STE) event, Atmos. Chem. Phys., 11, 22, pp.11913-11917, doi: 10.5194/acp-11-11913-2011.Gerrard, A. J., Y. Bhattacharya, and J. P. Thayer (2011), Observations of in-situ generated gravity waves during a stratospheric temperature enhancement (STE) event, Atmos. Chem. Phys. Discuss., 11, 14221-14232, doi:10.5194/acpd-11-14221-2011.Li, Z., S. Naqvi, A. J. Gerrard, J. L. Chau, and Y. Bhattacharya (2011), Numerical modeling of lower stratospheric Doppler ducted gravity waves over Jicamarca, Peru, Atmos. Chem. Phys. Discuss., 11, 19011-19027, doi:10.5194/acpd-11-19011-2011.Bhattacharya, Y., and A. J. Gerrard (2010), Wintertime mesopause region vertical winds from Resolute Bay, J. Geophys. Res., 115, D00N07, doi:10.1029/2010JD014113.Gerrard, A. J., D. Detrick, S. Mende, L. J. Lanzerotti, A. T. Weatherwax, and Y. Bhattacharya (2010), Photometric observations of 630.0-nm OI and 427.8-nm N2+ emission from South Pole and McMurdo Stations during winter: Analysis of temporal variations spanning minutes to hourly timescales, J. Geophys. Res., Vol. 115, No. A8, A08231, 10.1029/2009JA014970.