Hydrospheric and Biospheric Sciences Laboratory (614)
Profile for Thorsten Markus
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| Title: | Branch Head |
|---|---|
| Affiliation: | NASA |
| Contact: |
E-mail Office Phone: 301-614-5882 Fax: 301-614-5644 |
Short Biography
Thorsten Markus received his PhD degree in Physics from the University of Bremen, Germany. He came to Goddard in 1996 first as an NRC post-doc, working on Antarctic coastal polynyas, and then via UMBC JCET where he still is an adjunct professor in the physics department. In 2002 he was hired as a civil servant and became a member of the Microwave Sensors Branch.
His research focuses on the development of new approaches to derive cryospheric parameters from space-borne or air-borne observations. He is a member of the Aqua AMSR-E Science Team where he is responsible for the sea ice concentration and snow on sea ice products, and the ICESat Science Team. He participated in and co-led ship-borne and air-borne validation campaigns in both hemispheres. His research activities led him three times to the Antarctic and three times to the Arctic.
He furthermore is working on the utilization of satellite-derived geophysical parameters in data analysis efforts and in data assimilation schemes to explore the role of cryospheric processes in the polar and global climate system.
Selected Publications
Howell, S.E.L., C.R. Duguay, and T. Markus (2009). Sea ice conditions and melt season duration variability within the Canadian Arctic Archipelago: 1979–2008. Geophys. Res. Lett., 36(L10502)
10.1029/2009GL037681
Kurtz, N.T., T. Markus, D.J. Cavalieri, L.C. Sparling, W. Krabill, A.J. Gasiewski, and J.G. Sonntag (2009). Estimation of sea ice thickness distributions through the combination of snow depth and satellite laser altimetry data. J. Geophys. Res., 114, C10007
10.1029/2009JC005292
Markus, T., and D.J. Cavalieri (2009). The AMSR-E NT2 sea ice concentration algorithm: its basis and implementation. Journal of The Remote Sensing Society of Japan, 29(1), 216-225
Kurtz, N.T., T. Markus, D.J. Cavalieri, W. Krabill, J.G. Sonntag, and J. Miller (2008). Comparison of ICESat Data With Airborne Laser Altimeter Measurements Over Arctic Sea Ice. IEEE Trans. Geosci. Remote Sens., 46(7), 1913-1924
10.1109/TGRS.2008.916639
Maksym, T., and T. Markus (2008). Antarctic sea ice thickness and snow-to-ice conversion from atmospheric reanalysis and passive microwave snow depth. J. Geophys. Res., 113(C02S12), 18 pp
10.1029/2006JC004085
Puthalapat, D., C. Leuschen, T. Markus, D.J. Cavalieri, W. Krabill, J.G. Sonntag, M. Sturm, and J. Maslanik (2008). Conjunctive Radar and Laser Altimetry Data Processing to Measure Snow Thickness. Proc. IGARSS, 4, IV-1105 - IV-1108, 1
Worby, A.P., T. Markus, A.D. Steer, V.I. Lytle, and R.A. Massom (2008). Evaluation of AMSR-E snow depth product over East Antarctic sea ice using in situ measurements and aerial photography. J. Geophys. Res., 113(C05S94), 13 pp
10.1029/2007JC004181
Kanagaratnam, P., T. Markus, V. Lytle, B. Heavey, P. Jansen, G. Prescott, and S.P. Gogineni (2007). Ultrawideband Radar Measurements of Thickness of Snow Over Sea Ice. IEEE Trans. Geosci. Remote Sens., 45(9), 2715-2724
Kelly J., R.E., and T. Markus (2007). Analysis of time series of satellite passive microwave observations of snow over the Colorado Cold Lands Processes Experiment study region. Proc. 64th Meeting of the Eastern Snow Conference
Perovich, D.K., S.V. Nghiem, T. Markus, and A. Schweiger (2007). Seasonal evolution and interannual variability of the local solar energy absorbed by the Arctic sea ice—ocean system. J. Geophys. Res., 112(C03005), 13 pp
Tamura, T., K.I. Ohshima, T. Markus, D.J. Cavalieri, S. Nihashi, and N. Hirasawa (2007). Estimation of Thin Ice Thickness and Detection of Fast Ice from SSM/I Data in the Antarctic Ocean. J. Atmos. Oce. Technol., 24(10), 1757-1772
Cavalieri, D.J., T. Markus, R.K. Raney, and A.J. Gasiewski Guest Editors (2006). Foreword to the March 2003 EOS Aqua AMSR-E Arctic Sea Ice Field Campaign Special Issue. IEEE Trans. Geosci. Remote Sens., 44(11), 2999-3001
Cavalieri, D.J., T. Markus, J.A. Maslanik, M. Sturm, and E. Lobl (2006). March 2003 EOS Aqua AMSR-E Arctic Sea Ice Field Campaign. IEEE Trans. Geosci. Remote Sens., 44(11), 3003-3008
Cavalieri, D.J., T. Markus, D.K. Hall, A. Gasiewski, M. Klein, and A. Ivanoff (2006). Assessment of EOS Aqua AMSR-E Arctic sea ice concentrations using airborne microwave and Landsat 7 imagery. IEEE Trans. Geoscience Rem. Sens., 44, 3057-3069
Cavalieri, D.J., T. Markus, J. Maslanik, and M. Sturm (2006). March 2003 EOS Aqua AMSR-E Arctic sea ice field campaign. IEEE Trans. Geosci. Remote Sensing, 44, 3003-3008
Cavalieri, D.J., and T. Markus (2006). EOS Aqua AMSR-E Arctic Sea Ice Validation Program: Arctic2003 Aircraft Campaign Flight Report. NASA TM-2006-214142, 27
Heinrichs, J.F., D.J. Cavalieri, and T. Markus (2006). Assessment of the AMSR-E Sea Ice Concentration Product at the Ice Edge Using RADARSAT-1 and MODIS Imagery. IEEE Trans. Geosci. Remote Sens., 44(11), 3070-3080
Markus, T., D.J. Cavalieri, A.J. Gasiewski, M. Klein, J. Maslanik, D.C. Powell, B. Stankov, J.C. Stoeve, and M. Sturm (2006). Microwave Signatures of Snow on Sea Ice: Observations. IEEE Trans. Geosci. Remote Sens., 44(11), 3081-3090
Markus, T., D.C. Powell, and J.R. Wang (2006). Sensitivity of Passive Microwave Snow Depth Retrievals to Weather Effects and Snow Evolution. IEEE Trans. Geosci. Remote Sens., 44(1), 68-77
Markus, T., D.J. Cavalieri, A. Gasiewski, M. Klein, J.A. Maslanik, D. Powell, J.C. Stroeve, and M. Sturm (2006). Microwave Signatures of Snow on Sea Ice: Observations. IEEE Trans. Geosci. Remote Sensing, 44, 3081-3090
Markus, T., and D.J. Cavalieri (2006). Interannual and regional variability of Southern Ocean snow on sea ice. Annals of Glaciology, 44, 53-57
Markus, T., D. Powell, and J. Wang (2006). Sensitivity of passive microwave snow depth retrievals to weather effects and snow evolution. IEEE Trans. Geoscience and Remote Sensing, 44, 68-77
Powell, D.C., T. Markus, D.J. Cavalieri, A.J. Gasiewski, M. Klein, J.A. Maslanik, J.C. Stroeve, and M. Sturm (2006). Microwave Signatures of Snow on Sea Ice: Modeling. IEEE Trans. Geosci. Remote Sensing, 44, 3091-3102
Stroeve, J.C., T. Markus, J.A. Maslanik, D.J. Cavalieri, A.J. Gasiewski, J.F. Heinrichs, J. Holmgren, D.K. Perovich, and M. Sturm (2006). Impact of Surface Roughness on AMSR-E Sea Ice Products. IEEE Trans. Geosci. Remote Sensing, 44, 3103-3117
Bindschadler, R., H. Choi, C. Shuman, and T. Markus (2005). Detecting and measuring new snow accumulation on ice sheets by satellite remote sensing. Remote Sens. Environ., 98, 388-402
Bindschadler, R., H. Choi, C. Shuman, and T. Markus (2005). Detecting and measuring new snow accumulation on ice sheets by satellite remote sensing. Remote Sens. Environ., 98, 388-402
Bindschadler, R., H. Choi, C. Shuman, and T. Markus (2005). Detecting and measuring new snow accumulation on ice sheets by satellite remote sensing. Rem. Sens. Env., 98, 388-402
Kanagaratnam, P., T. Markus, V. Lytle, B.G. Prescott, and P. Gogineni (2005). Ultra-wideband radar measurements of thickness of snow cover of sea ice. IEEE Trans. Geoscience and Remote Sensing, (accepted w/ minor r
Perovich, D.K., S.V. Nghiem, and T. Markus (2005). Seasonal cycles and interannual variability of the portioning of solar energy by Arctic sea ice. J. Geophys. Res., (accepted w/ minor r
Powell, D., T. Markus, and A. Stoessel (2005). The effects of snow depth forcing of Southern Ocean sea ice simulations. J. Geophys. Res., 110, C06001
10.1029/2003JC002212
Tamura, T., K.I. Ohshima, T. Markus, D.J. Cavalieri, S. Nihashi, and N. Hirasawa (2005). Estimation of thin ice thickness and detection of fast ice from SSM/I data in the Antarctic Ocean. J. Atm. Oceanic Techn., (submitted)
Cavalieri, D.J., J. Maslanik, T. Markus, J.C. Stoeve, M. Sturm, J. Heinrichs, E. Kim, A.J. Gasiewski, and J.C. Comiso (2003). EOS Aqua AMSR-E Arctic Sea Ice Validation Program. Proc. SPIE Int. Soc. Opt. Eng., 4894, 413-424
Cavalieri, D.J., and T. Markus (2003). EOS Aqua AMSR-E Arctic Sea Ice Validation Program: Arctic 2003 Aircraft Campaign Flight Report. NASA/TM 2003-212247, 44 pp
Cavalieri, D.J., and T. Markus (2003). EOS Aqua AMSR-E Arctic Sea Ice Validation Program: Arctic2003 Aircraft Campaign Flight Report. NASA TM-2003-212247, 40
Comiso, J.C., D.J. Cavalieri, and T. Markus (2003). Sea ice concentration, ice temperature, and snow depth using AMSR-E data. IEEE Trans. Geosci. Remote Sens., 41(2), 243-252
Gogineni, S., K. Wong, S. Krishnan, P. Kanagratnam, T. Markus, and V. Lytle (2003). An Ultra-wide Radar for Measurements of Snow Thickness Over Sea Ice. Proc.IGARSS 2003, 4, 2802-2804
Markus, T., D.J. Cavalieri, M.A. Tschudi, and A. Ivanoff (2003). Comparison of aerial video and Landsat 7 data over ponded sea ice. Remote Sens. Environ., 86, 458-469
Shokr, M., and T. Markus (2003). Evaluation of Ice Concentration Algorithms Using Data Fusion of SSM/I and Radarsat. Proc. IGARSS 2003, 1, 65-67
Arrigo, K.R., G.L. van Dijken, T. Markus, M.A. Fahnestock, and D.G. Ainley (2002). Ecological impact of a large Antarctic iceberg. Geophys. Res. Lett., 29(7), 8-1 - 8-4
Dokken, S.T., P. Winsor, T. Markus, J. Askne, and G. Bjrk (2002). ERS SAR characterization of coastal polynyas in the Arctic and comparison with SSM/I and numerical model investigations. Rem. Sens. of Environ., 80, 321-335
Markus, T., and S.T. Dokken (2002). Evaluation of Late Summer Passive Microwave Artic Sea Ice Retrievals. IEEE Trans. Geosci. Rem. Sens., 40(2), 348-356
Markus, T., D.J. Cavalieri, and A. Ivanoff (2002). The potential of using Landsat 7 ETM+ for the classification of sea-ice surface conditions during summer. Ann. Glaciol., 34, 415-419
Markus, T., and D.J. Cavalieri (2002). The potential of using Landsat 7 data for the classification of sea ice surface conditions during summer. Annals of Glaciology, 34, 415-419
Renfrew, I.A., J.C. King, and T. Markus (2002). Coastal polynyas in the southern Weddell Sea: Variability of the surface energy budget. J. Geophys. Res., 107(C6), 16-1 - 16-22
Stoessel, A., and T. Markus (2002). Representation of Antarctic Coastal Polynyas in Ocean Climate Models: A Justification for Assimilation of Ice Concentration. Proc. Report to NASA on a Workshop on Sea Ice Data Assimilation, 33
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