Search Results - "HOPPEL, K. W"

Evolution of the quasi 2-day wave during January 2006 by McCormack, J. P., Coy, L., Hoppel, K. W.

“…We examine the evolution of the quasi 2‐day wave in the middle atmosphere during the period from 5 January to 5 February 2006 using global synoptic…”
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Wind extraction potential from ensemble Kalman filter assimilation of stratospheric ozone using a global shallow water model by Allen, D R, Hoppel, K W, Kuhl, D D

“…The feasibility of extracting wind information from stratospheric ozone observations is tested using ensemble Kalman filter (EnKF) data assimilation (DA) and a…”
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Amplification of the quasi-two day wave through nonlinear interaction with the migrating diurnal tide by McCormack, J. P., Eckermann, S. D., Hoppel, K. W., Vincent, R. A.

“…We present a case study of the non‐linear interaction between the quasi‐two day wave (Q2DW) and the migrating diurnal tide based on global synoptic meridional…”
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Seasonal variation of the quasi 5 day planetary wave: Causes and consequences for polar mesospheric cloud variability in 2007 by Nielsen, K., Siskind, D. E., Eckermann, S. D., Hoppel, K. W., Coy, L., McCormack, J. P., Benze, S., Randall, C. E., Hervig, M. E.

“…We have investigated the 5 day wave in both temperature and water vapor in the stratosphere and mesosphere as seen in the Navy Operational Global Atmospheric…”
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Limitations of wind extraction from 4D-Var assimilation of ozone by Allen, D. R, Hoppel, K. W, Nedoluha, G. E, Kuhl, D. D, Baker, N. L, Xu, L, Rosmond, T. E

“…Time-dependent variational data assimilation allows the possibility of extracting wind information from observations of ozone or other trace gases. Since trace…”
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Assimilation of stratospheric and mesospheric temperatures from MLS and SABER into a global NWP model by Hoppel, K. W., Baker, N. L., Coy, L., Eckermann, S. D., McCormack, J. P., Nedoluha, G. E., Siskind, D. E.

“…The forecast model and three-dimensional variational data assimilation components of the Navy Operational Global Atmospheric Prediction System (NOGAPS) have…”
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POAM III retrieval algorithm and error analysis by Lumpe, J. D., Bevilacqua, R. M., Hoppel, K. W., Randall, C. E.

“…This paper describes the operational version 3 algorithms used to analyze data from the Polar Ozone and Aerosol Measurement (POAM) III instrument. We include a…”
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Mesospheric Precursors to the Major Stratospheric Sudden Warming of 2009: Validation and Dynamical Attribution Using a Ground‐to‐Edge‐of‐Space Data Assimilation System by Coy, L., Eckermann, S. D., Hoppel, K. W., Sassi, F

“…Global meteorological analyses from an assimilation of operational and research observations spanning the ∼0–90 km altitude range confirm earlier tentative…”
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Quantifying Arctic ozone loss during the 2004–2005 winter using satellite observations and a chemical transport model by Singleton, C. S., Randall, C. E., Harvey, V. L., Chipperfield, M. P., Feng, W., Manney, G. L., Froidevaux, L., Boone, C. D., Bernath, P. F., Walker, K. A., McElroy, C. T., Hoppel, K. W.

“…During the last decade, much attention has been placed on quantifying and modeling Arctic stratospheric O3 loss. At issue in particular is the reliability of…”
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Validation of POAM III ozone: Comparisons with ozonesonde and satellite data by Randall, C. E., Rusch, D. W., Bevilacqua, R. M., Hoppel, K. W., Lumpe, J. D., Shettle, E., Thompson, E., Deaver, L., Zawodny, J., Kyrö, E., Johnson, B., Kelder, H., Dorokhov, V. M., König-Langlo, G., Gil, M.

“…This paper describes the validation of ozone profiles from the Polar Ozone and Aerosol Measurement (POAM) III instrument. POAM III O3 is measured with 1‐km…”
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Intensity and phase statistics of multilook polarimetric and interferometric SAR imagery by Jong-Sen Lee, Hoppel, K.W., Mango, S.A., Miller, A.R.

“…Polarimetric and interferometric SAR data are frequently multilook processed for speckle reduction and data compression. The statistical characteristics of…”
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2002-2003 Arctic ozone loss deduced from POAM III satellite observations and the SLIMCAT chemical transport model by Singleton, C S, Randall, C E, Chipperfield, M P, Davies, S, Feng, W, Bevilacqua, R M, Hoppel, K W, Fromm, M D, Manney, G L, Harvey, V L

“…The SLIMCAT three-dimensional chemical transport model (CTM) is used to infer chemical ozone loss from Polar Ozone and Aerosol Measurement (POAM) III…”
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Polar Ozone and Aerosol Measurement (POAM) II stratospheric NO2, 1993-1996 by Randall, C. E., Rusch, D. W., Bevilacqua, R. M., Hoppel, K. W., Lumpe, J. D.

“…We describe, for the first time, measurements of stratospheric nitrogen dioxide (NO2) by the Polar Ozone and Aerosol Measurement (POAM II) instrument…”
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Validation of POAM III aerosols: Comparison to SAGE II and HALOE by Randall, C. E., Bevilacqua, R. M., Lumpe, J. D., Hoppel, K. W.

“…We describe statistical comparisons between Polar Ozone and Aerosol Measurement (POAM) III and Stratosphere Aerosol and Gas Experiment (SAGE) II measurements…”
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Microphysical modeling of southern polar dehydration during the 1998 winter and comparison with POAM III observations by Benson, C. M., Drdla, K., Nedoluha, G. E., Shettle, E. P., Hoppel, K. W., Bevilacqua, R. M.

“…Stratospheric dehydration and high aerosol extinctions are examined for the 1998 Antarctic winter using the Integrated Microphysics and Aerosol Chemistry on…”
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Polar stratospheric clouds in the 1998–2003 Antarctic vortex: Microphysical modeling and Polar Ozone and Aerosol Measurement (POAM) III observations by Benson, C. M., Drdla, K., Nedoluha, G. E., Shettle, E. P., Alfred, J., Hoppel, K. W.

“…The Integrated Microphysics and Aerosol Chemistry on Trajectories (IMPACT) model is used to study polar stratospheric cloud (PSC) formation and evolution in…”
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Dilution of the Antarctic ozone hole into southern midlatitudes, 1998–2000 by Ajtić, J., Connor, B. J., Lawrence, B. N., Bodeker, G. E., Hoppel, K. W., Rosenfield, J. E., Heuff, D. N.

“…The reduction in southern midlatitude ozone is quantified by evaluating the trajectories of ozone‐depleted air masses, assuming that photochemical recovery of…”
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Chemical loss of ozone during the Arctic winter of 1999/2000: An analysis based on balloon-borne observations by Salawitch, R. J., Margitan, J. J., Sen, B., Toon, G. C., Osterman, G. B., Rex, M., Elkins, J. W., Ray, E. A., Moore, F. L., Hurst, D. F., Romashkin, P. A., Bevilacqua, R. M., Hoppel, K. W., Richard, E. C., Bui, T. P.

“…Simultaneous balloon‐borne observations of ozone (O3) and nitrous oxide (N2O), a long‐lived tracer of dynamical motion, are used to quantify the chemical loss…”
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POAM III measurements of dehydration in the Antarctic lower stratosphere by Nedoluha, G. E., Bevilacqua, R. M., Hoppel, K. W., Daehler, M., Shettle, E. P., Hornstein, J. H., Fromm, M. D., Lumpe, J. D., Rosenfield, J. E.

“…We present measurements of stratospheric water vapor and aerosols in the Antarctic from the POAM III instrument during the period April through December 1998…”
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Reconstruction of three-dimensional ozone fields using POAM III during SOLVE by Randall, C. E., Lumpe, J. D., Bevilacqua, R. M., Hoppel, K. W., Fromm, M. D., Salawitch, R. J., Swartz, W. H., Lloyd, S. A., Kyro, E., von der Gathen, P., Claude, H., Davies, J., DeBacker, H., Dier, H., Molyneux, M. J., Sancho, J.

“…In this paper we demonstrate the utility of the Polar Ozone and Aerosol Measurement (POAM) III data for providing semiglobal three‐dimensional ozone fields…”
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