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Ali Omar
Ali Omar
Email | Website
NASA Langley Research Center
Title: Deputy Program Applications Lead

Science Meeting Presentations (7)

PACE: How Can We Do Our Science in a Way That Will Maximize its Utility
Tzortziou, M., Omar, A., and Turner, W. (16-Jan-18). Click here to view this presentation with audio.
PACE: How Can We Do Our Science in a Way that Will Maximize its Utility
Tzortziou, M., Omar, A., and Turner, W. (17-Jan-17). Click here to view this presentation with audio.
Applications for Societal Benefits from Atmospheric PACE Products
Omar, A. (17-Jan-17)
Maximizing the Societal Benefits of PACE IOP Data by Actively Linking the Mission to its Applications
Tzortziou, M., Omar, A., and Turner, W. (20-Jan-16)
Maximizing the Societal Benefits of PACE Atmospheric Data by Actively Linking the Mission to its Applications
Omar, A. (20-Jan-16)
Maximizing the Societal Benefits of PACE Atmospheric Data by Actively Linking the Mission to its Applications
Omar, A. and Tzortziou, M. (14-Jan-15)
Maximizing the Societal Benefits of PACE IOP Data by Actively Linking the Mission to its Applications
Tzortziou, M. and Omar, A. (14-Jan-15)

Publications (34)

Remer, L.A., Davis, A.B., Mattoo, S., Levy, R.C., Kalashnikova, O.V., Coddington, O., Chowdhary, J., Knobelspiesse, K., Xu, X., Ahmad, Z., Boss, E., Cairns, B., Dierssen, H.M., Diner, D.J., Franz, B., Frouin, R., Gao, B-C., Ibrahim, A., Martins, J.V., Omar, A.H., Torres, O., Xu, F., and Zhai, P-W. (2019). Retrieving Aerosol Characteristics From the PACE Mission, Part 1: Ocean Color Instrument, Front. Earth Sci., 7, 152, doi: 10.3389/feart.2019.00152.
Remer, L.A., Knobelspiesse, K., Zhai, P-W., Xu, F., Kalashnikova, O.V., Chowdhary, J., Hasekamp, O., Dubovik, O., Wu, L., Ahmad, Z., Boss, E., Cairns, B., Coddington, O., Davis, A.B., Dierssen, H.M., Diner, D.J., Franz, B., Frouin, R., Gao, B-C., Ibrahim, A., Levy, R.C., Martins, J.V., Omar, A.H., and Torres, Om (2019). Retrieving Aerosol Characteristics From the PACE Mission, Part 2: Multi-Angle and Polarimetry, Front. Earth Sci., 7, 94, doi: 10.3389/fenvs.2019.00094.
Frouin, R.J., Franz, B.A., Ibrahim, A., Knobelspiesse, K., Ahmad, Z., Cairns, B., Chowdhary, J., Dierssen, H.M., Tan, J., Dubovik, O., Huang, X., Davis, A.B., Kalashnikova, O., Thompson, D.R., Remer, L.A., Boss, E., Coddington, O., Deschamps, P-Y., Gao, B-C., Gross, L., Hasekamp, O., Omar, A., Pelletier, B., Ramon, D., Steinmetz, F., and Zhai, P-W. (2019). Atmospheric Correction of Satellite Ocean-Color Imagery During the PACE Era, Front. Earth Sci., 7, 145, doi: 10.3389/feart.2019.00145.
Omar, A.H., Tzortziou, M., Coddington, O., and Remer, L.A. (2018). Plankton, Aerosol, Cloud, ocean Ecosystem Mission: Atmosphere Measurements for Air Quality Applications, J. Appl. Remote Sens. 12(4), 042608, doi: 10.1117/1.JRS.12.042608.
Hu, Y., Behrenfeld, M., Hostetler, C., Pelon, J., Trepte, C., Hair, J., Slade, W., Cetinić, I., Vaughan, M., Lu, X., Zhai, P., Weimer, C., Winker, D., Verhappen, C.C., Butler, C., Liu, Z., Hunt, B., Omar, A., Rodier, S., Lifermann, A., Josset, D., Hou, W., Macdonnell, D., and Rhew, R. (2016). Ocean Lidar Measurements of Beam Attenuation and a Roadmap to Accurate Phytoplankton Biomass Estimates, EPJ Web of Conferences, 119, 22003, doi: 10.1051/Epjconf/201611922003.
Yu, H., Chin, M., Bian, H., Yuan, T., Prospero, J., Omar, A.H., Remer, L., Winker, D., Yang, W., Zhang, Y., and Zhang, Z. (2015). Quantification of Trans-Atlantic Dust Transport from Seven-Year (2007-2013) Record of CALIPSO Lidar Measurements, Remote Sens. Environ., 159, 232-249, doi: 10.1016/J.Rse.2014.12.010.
Kacenelenbogen, M., Redemann, J., Vaughan, M.A., Omar, A.H., Russell, P.B., Burton, S., Rogers, R.R., Ferrare, R.A., and Hostetler, C.A. (2014). An Evaluation of CALIOP/CALIPSO's Aerosol-Above-Cloud Detection and Retrieval Capability Over North America, J. Geophys. Res. Atmos., 119(1), 230-244, doi: 10.1002/2013JD020178.
Kim, M.-H., Kim, S.-W., Yoon, S.-C., and Omar, A.H. (2013). Comparison of Aerosol Optical Depth Between CALIOP and MODIS-Aqua for CALIOP Aerosol Subtypes Over the Ocean, J. Geophys. Res. Atmos., 118, 13241-13252, doi: 10.1002/2013JD019527.
Vernier, J.-P., Fairlie, T.D., Murray, J.J., Tupper, A., Trept, C., Winker, D., Pelon, J., Garnier, A., Jumelet, J., Pavolonis, M., Omar, A.H., and Powell, K.A. (2013). An Advanced System To Monitor the 3D Structure of Diffuse Volcanic Ash Clouds, J. Appl. Meteorol. Clim., 52(9), 2125-2138, doi: 10.1175/JAMC-D-12-0279.1.
Omar, A.H., Winker, D.M., Tackett, J.L., Giles, D.M., Kar, J., Liu, Z., Vaughan, M.A., Powell, K.A., and Trepte, C.R. (2013). CALIOP and AERONET Aerosol Optical Depth Comparisons: One Size Fits None, J. Geophys. Res. Atmos., 118(10), 4748-4766, doi: 10.1002/Jgrd.50330.
Burton, S.P., Ferrare, R.A., Vaughan, M.A., Omar, A.H., Rogers, R.R., Hostetler, C.A., and Hair, J.W. (2013). Aerosol Classification from Airborne HSRL and Comparisons With the CALIPSO Vertical Feature Mask, Atmos. Meas. Tech., 6, 1397-1412, doi: 10.5194/Amt-6-1397-2013.
Tesche, M., Wandinger, U., Ansmann, A., Althausen, D., Müller, D., and Omar, A.H. (2013). Ground-Based Validation of CALIPSO Observations of Dust and Smoke in the Cape Verde Region, J. Geophys. Res. Atmos., 118(7), 2889-2902, doi: 10.1002/Jgrd.50248.
Wang, J., Park, S., Zeng, J., Ge, C. Yang, K., Carn, S., Krotkov, N., and Omar, A.H. (2013). Modeling of 2008 Kasatochi Volcanic Sulfate Direct Radiative Forcing: Assimilation of OMI SO2 Plume Height Data and Comparison With MODIS and CALIOP Observations, Atmos. Chem. Phys., 13, 1895-1912, doi: 10.5194/Acp-13-1895-2013.
Liu, Z., Fairlie, T.D., Uno, I., Huang, J., Wue, D., Omar, A., Kara, J., Vaughan, M., Rogers, R., Winker, D., Trepte C., Hu, Y., Sun, W., Lin, B., and Cheng, A. (2013). Transpacific Transport and Evolution of the Optical Properties of Asian Dust, J. Quant. Spectrosc. Ra., 116, 24-33, doi: 10.1016/J.Jqsrt.2012.11.011.
Yu, H., Zhang, Y., Chin, M., Liu, Z., Omar, A., Remer, L., Yang, Y., Yuan, T., and Zhang, J. (2012). An Integrated Analysis of Aerosol Above Clouds from A-Train Multi-Sensor Measurements, Remote Sens. Environ., 121, 125-131, doi: 10.1016/J.Rse.2012.01.011.
Winker, D.M., Liu, Z., Omar, A., Tackett, J., and Fairlie, D. (2012). CALIOP Observations of the Transport of Ash from the Eyjafjallajökull Volcano in April 2010, J. Geophys. Res. Atmos., 117(D20), D00U15, doi: 10.1029/2011JD016499.
Mona, L., Liu, Z., Müller, D., Omar, A., Papayannis, A., Pappalardo, G., Sugimoto, N., Vaughan, M. (2012). Lidar Measurements for Desert Dust Characterization: An Overview, Advances in Meteorology, Article ID 356265, 36 pp., doi: 10.1155/2012/356265.
Kittaka, C., Winker, D.M., Vaughan, M.A., Omar, A., and Remer, L.A. (2011). Intercomparison of Column Aerosol Optical Depths from CALIPSO and MODIS-Aqua, Atmos. Meas. Tech., 4, 131-141, doi: 10.5194/Amt-4-131-2011.
Liu, Z., Winker, D., Omar, A., Vaughan, M., Trepte, C., Hu, Y., Powell, K.A., Sun, W., and Lin, B. (2011). Effective Lidar Ratios of Dense Dust Layers Over North Africa Derived from the CALIOP Measurements, J. Quant. Spectrosc. Ra., 112, 204-213, doi: 10.1016/J.Jqsrt.2010.05.006.
Omar, A., Liu, Z., Vaughan, M., Thornhill, K., Kittaka, C., Ismail, S., Hu, Y., Chen, G., Powell, K., Winker, D., Trepte, C., Winstead, E., and Anderson, B. (2010). Extinction-To-Backscatter Ratios of Saharan Dust Layers Derived from In Situ Measurements and CALIPSO Overflights During NAMMA, J. Geophys. Res. Atmos., 115(D24), D24217, doi: 10.1029/2010JD014223.
Kar, J., Deeter, M.N., Fishman, J., Liu, Z., Omar, A., Creilson, J.K., Trepte, C.R., Vaughan, M.A. and Winker, D.M. (2010). Wintertime Pollution Over the Eastern Indo-Gangetic Plains as Observed from MOPITT, CALIPSO and Tropospheric Ozone Residual Data, Atmos. Chem. Phys., 10,12273-12283, doi: 10.5194/Acp-10-12273-2010.
Devasthale, A., Tjernström, M., And Omar, A.H. (2010). The Vertical Distribution of Thin Features Over the Arctic Analysed from CALIPSO Observations: Part II: Aerosols, Tellus B, 63(1), 86-95, doi: 10.1111/J.1600-0889.2010.00517.X.
Yu, H., Chin, M., Winker, D., Omar, A., Liu, Z., Kittake, C., and Diehl, T. (2010). Global View of Aerosol Vertical Distributions from CALIPSO Lidar Measurements and GOCART Simulations: Regional and Seasonal Variations, J. Geophys. Res. Atmos., 115(D4), D00H30, doi: 10.1029/2009JD013364.
Winker, D.M., Vaughan, M.A., Omar, A., Hu, Y., Powell, K.A., Liu, Z., Hunt, W.H., and Young, S.A. (2009). Overview of the CALIPSO Mission and CALIOP Data Processing Algorithms, J. Atmos. Ocean. Tech., 26(11), 2310-2323, doi: 10.1175/2009JTECHA1281.1.
Omar, A., Winker, D.M., Vaughan, M.A., Hu, Y., Trepte, C.R., Ferrare, R.A., Lee, K.-P., Hostetler, C.A., Kittaka, C., Rogers, R.R., Kuehn, R.E., and Liu, Z. (2009). The CALIPSO Automated Aerosol Classification and Lidar Ratio Selection Algorithm, J. Atmos. Ocean. Tech., 26(10), 1994-2014, doi: 10.1175/2009JTECHA1231.1.
Omar, A., Vaughan, M., Kittaka, C., and Winker, D. (2008). Case Studies and Comparisons of the CALIPSO Aerosol Optical Depth Measurements and Aerosol Type Estimates, Proc. SPIE, 7111, 71110A, doi: 10.1117/12.800353.
Hu, Y., Stamnes, K., Vaughan, M., Pelon. J., Weimer, C., Wu, D., Cisewski, M., Sun. W., Yang, P., Lin, B., Omar, A., Flittner, D., Hostetler, C., Trepte, C., Winker, D., Gibson, G., and Santa-Maria, M. (2008). Sea Surface Wind Speed Estimation from Space-Based Lidar Measurements, Atmos. Chem. Phys., 8, 3593-3601, doi: 10.5194/Acp-8-3593-2008.
Thornhill, K.L., Chen, G., Dibb, J., Jordan, C.E., Omar, A., Winstead, E., Schuster, G., Clarke, A., McNaughton, C., Scheuer, E., Blake, D., Sachse, G., Huey, L.G., Singh, H.B., and Anderson, B.E. (2008). The Impact of Local Sources and Long-Range Transport On Aerosol Properties Over the Northeast U.S. Region During INTEX-NA, J. Geophys. Res. Atmos., 113(D8), D08201, doi: 10.1029/2007JD008666.
Liu, Z., Omar, A., Vaughan, M., Hair, J., Kittaka, C., Hu, Y., Powell, K., Trepte, C., Winker, D., Hostetler, C., Ferrare, R., and Pierce, R. (2008). CALIPSO Lidar Observations of the Optical Properties of Saharan Dust: A Case Study of Long-Range Transport, J. Geophys. Res. Atmos., 113(D7), D07207, doi: 10.1029/2007JD008878.
Omar, A.H., Won, J.-G., Winker, D.M., Yoon, S.-C., Dubovik, O. and McCormick, M.P. (2005). Development of Global Aerosol Models Using Cluster Analysis of Aerosol Robotic Network (AERONET) Measurements, J. Geophys. Res. Atmos., 110(D10), D10S14, doi: 10.1029/2004JD004874.
Vaughan, M.A., Young, S.A., Winker, D.A., Powell, K.A., Omar, A.H., Liu, Z., Hu, Y., and Hostetler, C.A. (2004). Fully Automated Analysis of Space-Based Lidar Data: An Overview of the CALIPSO Retrieval Algorithms and Data Products, Proc. SPIE, 5575, 16, doi: 10.1117/12.572024.
Omar, A.H. and Gardner, C.S. (2001). Observations By the Lidar In-Space Technology Experiment (LITE) of High-Altitude Cirrus Clouds Over the Equator in Regions Exhibiting Extremely Cold Temperatures, J. Geophys. Res. Atmos., 106(D1), 1227-1236, doi: 10.1029/2000JD900489.
Omar, A.H., Biegalski, S., Larson, S., and Landsberger, S. (1999). Particulate Contributions To Light Extinction and Local Forcing At a Rural Illinois Site, Atmos. Environ., 33(17), 2637-2646, doi: 10.1016/S1352-2310(98)00327-6.
Rahmes, T.F., Omar, A.H., and Wuebbles , D.J (1998). Atmospheric Distributions of Soot Particles By Current and Future Aircraft Fleets and Resulting Radiative Forcing On Climate, J. Geophys. Res. Atmos., 103(D24), 31657-31667, doi: 10.1029/98JD02815.