Search Results - "Knepp, T N"

Evaluation of OMI operational standard NO2 column retrievals using in situ and surface-based NO2 observations by Lamsal, L N, Krotkov, N A, Celarier, E A, Swartz, W H, Pickering, K E, Bucsela, E J, Gleason, J F, Martin, R V, Philip, S, Irie, H, Cede, A, Herman, J, Weinheimer, A, Szykman, J J, Knepp, T N

“…We assess the standard operational nitrogen dioxide (NO2) data product (OMNO2, version 2.1) retrieved from the Ozone Monitoring Instrument (OMI) onboard NASA's…”
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Surface ozone at a coastal suburban site in 2009 and 2010: Relationships to chemical and meteorological processes by Martins, D. K., Stauffer, R. M., Thompson, A. M., Knepp, T. N., Pippin, M.

“…Air quality and meteorological measurements were conducted at the Chemistry and Physics of the Atmospheric Boundary Layer Experiment (CAPABLE) site during the…”
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Temporal and spatial characteristics of ozone depletion events from measurements in the Arctic by Halfacre, J. W, Knepp, T. N, Shepson, P. B, Thompson, C. R, Pratt, K. A, Li, B, Peterson, P. K, Walsh, S. J, Simpson, W. R, Matrai, P. A, Bottenheim, J. W, Netcheva, S, Perovich, D. K, Richter, A

“…Following polar sunrise in the Arctic springtime, tropospheric ozone episodically decreases rapidly to near-zero levels during ozone depletion events (ODEs)…”
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Gas phase acetic acid and its qualitative effects on snow crystal morphology and the quasi-liquid layer by Knepp, T. N., Renkens, T. L., Shepson, P. B.

“…A chamber was constructed within which snow crystals were grown on a string at various temperatures, relative humidities, and acetic acid gas phase mole…”
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BATAL: The Balloon Measurement Campaigns of the Asian Tropopause Aerosol Layer by Vernier, J.-P., Fairlie, T. D., Deshler, T., Ratnam, M. Venkat, Gadhavi, H., Kumar, B. S., Natarajan, M., Pandit, A. K., Raj, S. T. Akhil, Kumar, A. Hemanth, Jayaraman, A., Singh, A. K., Rastogi, N., Sinha, P. R., Kumar, S., Tiwari, S., Wegner, T., Baker, N., Vignelles, D., Stenchikov, G., Shevchenko, I., Smith, J., Bedka, K., Kesarkar, A., Singh, V., Bhate, J., Ravikiran, V., Rao, M. Durga, Ravindrababu, S., Patel, A., Vernier, H., Wienhold, F. G., Liu, H., Knepp, T. N., Thomason, L., Crawford, J., Ziemba, L., Moore, J., Crumeyrolle, S., Williamson, M., Berthet, G., Jégou, F., Renard, J.-B.

“…We describe and show results from a series of field campaigns that used balloonborne instruments launched from India and Saudi Arabia during the summers…”
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Development of an autonomous sea ice tethered buoy for the study of ocean-atmosphere-sea ice-snow pack interactions: the O-buoy by Knepp, T. N., Bottenheim, J., Carlsen, M., Carlson, D., Donohoue, D., Friederich, G., Matrai, P. A., Netcheva, S., Perovich, D. K., Santini, R., Shepson, P. B., Simpson, W., Valentic, T., Williams, C., Wyss, P. J.

“…A buoy based instrument platform (the "O-buoy") was designed, constructed, and field tested for year-round measurement of ozone, bromine monoxide, carbon…”
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Characterization of stratospheric particle size distribution uncertainties using SAGE II and SAGE III/ISS extinction spectra by Knepp, Travis N, Kovilakam, Mahesh, Thomason, Larry, Miller, Stephen J

“…A new algorithm was developed to infer particle size distribution parameters from the Stratospheric Aerosol and Gas Experiment II (SAGE II) and SAGE III on the…”
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Identification of smoke and sulfuric acid aerosol in SAGE III/ISS extinction spectra by Knepp, Travis N, Thomason, Larry, Kovilakam, Mahesh, Tackett, Jason, Kar, Jayanta, Damadeo, Robert, Flittner, David

“…We developed a technique to classify the composition of enhanced aerosol layers as either smoke or sulfuric acid aerosol using extinction spectra from the…”
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The first evaluation of formaldehyde column observations by improved Pandora spectrometers during the KORUS-AQ field study by Spinei, Elena, Whitehill, Andrew, Fried, Alan, Tiefengraber, Martin, Knepp, Travis N, Herndon, Scott, Herman, Jay R, Müller, Moritz, Abuhassan, Nader, Cede, Alexander, Richter, Dirk, Walega, James, Crawford, James, Szykman, James, Valin, Lukas, Williams, David J, Long, Russell, Swap, Robert J, Lee, Youngjae, Nowak, Nabil, Poche, Brett

“…The Korea-United States Air Quality Study (KORUS-AQ) conducted during May-June 2016 offered the first opportunity to evaluate direct-sun observations of…”
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Comprehensive evaluations of diurnal NO2 measurements during DISCOVER-AQ 2011: effects of resolution-dependent representation of NOx emissions by Li, Jianfeng, Wang, Yuhang, Zhang, Ruixiong, Smeltzer, Charles, Weinheimer, Andrew, Herman, Jay, K Folkert Boersma, Celarier, Edward A, Long, Russell W, Szykman, James J, Delgado, Ruben, Thompson, Anne M, Knepp, Travis N, Lamsal, Lok N, Janz, Scott J, Kowalewski, Matthew G, Liu, Xiong, Nowlan, Caroline R

“…Nitrogen oxides (NOx = NO + NO2) play a crucial role in the formation of ozone and secondary inorganic and organic aerosols, thus affecting human health,…”
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Evaluation of a method for converting Stratospheric Aerosol and Gas Experiment (SAGE) extinction coefficients to backscatter coefficients for intercomparison with lidar observations by Knepp, Travis N, Thomason, Larry, Roell, Marilee, Damadeo, Robert, Leavor, Kevin, Leblanc, Thierry, Chouza, Fernando, Khaykin, Sergey, Godin-Beekmann, Sophie, Flittner, David

“…Aerosol backscatter coefficients were calculated using multiwavelength aerosol extinction products from the SAGE II and III/ISS instruments (SAGE:…”
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Assessment of Mixed-Layer Height Estimation from Single-wavelength Ceilometer Profiles by Knepp, Travis N, Szykman, James J, Long, Russell, Duvall, Rachelle M, Krug, Jonathan, Beaver, Melinda, Cavender, Kevin, Kronmiller, Keith, Wheeler, Michael, Delgado, Ruben, Hoff, Raymond, Berkoff, Timothy, Olson, Erik, Clark, Richard, Wolfe, Daniel, Van Gilst, David, Neil, Doreen

“…Differing boundary/mixed-layer height measurement methods were assessed in moderately-polluted and clean environments, with a focus on the Vaisala CL51…”
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Intercomparison of Pandora stratospheric NO2 slant column product with the NDACC-certified M07 spectrometer in Lauder, New Zealand by Knepp, Travis N, Querel, Richard, Johnston, Paul, Thomason, Larry, Flittner, David, Zawodny, Joseph M

“…In September 2014, a Pandora multi-spectral photometer operated by the SAGE-III project was sent to Lauder, New Zealand, to operate side-by-side with the…”
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Evaluation of OMI operational standard NO 2 column retrievals using in situ and surface-based NO 2 observations by Lamsal, L. N., Krotkov, N. A., Celarier, E. A., Swartz, W. H., Pickering, K. E., Bucsela, E. J., Gleason, J. F., Martin, R. V., Philip, S., Irie, H., Cede, A., Herman, J., Weinheimer, A., Szykman, J. J., Knepp, T. N.

“…We assess the standard operational nitrogen dioxide (NO2) data product (OMNO2, version 2.1) retrieved from the Ozone Monitoring Instrument (OMI) onboard NASA's…”
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Evaluation of OMI operational standard NO.sub.2 column retrievals using in situ and surface-based NO.sub.2 observations by Lamsal, L. N, Krotkov, N. A, Celarier, E. A, Swartz, W. H, Pickering, K. E, Bucsela, E. J, Gleason, J. F, Martin, R. V, Philip, S, Irie, H, Cede, A, Herman, J, Weinheimer, A, Szykman, J. J, Knepp, T. N

“…We assess the standard operational nitrogen dioxide (NO.sub.2) data product (OMNO2, version 2.1) retrieved from the Ozone Monitoring Instrument (OMI) onboard…”
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