Search Results - "Lait, L. R."

The anomalous change in the QBO in 2015–2016 by Newman, P. A., Coy, L., Pawson, S., Lait, L. R.

“…The quasi‐biennial oscillation (QBO) is a tropical lower stratospheric, downward propagating zonal wind variation, with an average period of ~28 months. The…”
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Particle Formation by Ion Nucleation in the Upper Troposphere and Lower Stratosphere by S. -H. Lee, Reeves, J. M., Wilson, J. C., Hunton, D. E., Viggiano, A. A., Miller, T. M., Ballenthin, J. O., Lait, L. R.

“…Unexpectedly high concentrations of ultrafine particles were observed over a wide range of latitudes in the upper troposphere and lower stratosphere. Particle…”
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QBO and annual cycle variations in tropical lower stratosphere trace gases from HALOE and Aura MLS observations by Schoeberl, M. R., Douglass, A. R., Newman, P. A., Lait, L. R., Lary, D., Waters, J., Livesey, N., Froidevaux, L., Lambert, A., Read, W., Filipiak, M. J., Pumphrey, H. C.

“…We have analyzed thirteen years (1993 to 2005) of HALOE and over two years of EOS MLS observations (September 2004 to December 2006) for QBO and annual cycle…”
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Evolution of inorganic chlorine partitioning in the Arctic polar vortex by Wilmouth, D. M., Stimpfle, R. M., Anderson, J. G., Elkins, J. W., Hurst, D. F., Salawitch, R. J., Lait, L. R.

“…The first simultaneous, in situ atmospheric measurements of ClO, ClOOCl, ClONO2, and HCl, which together nearly compose total inorganic chlorine, Cly, were…”
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Chemical observations of a polar vortex intrusion by Schoeberl, M. R., Kawa, S. R., Douglass, A. R., McGee, T. J., Browell, E. V., Waters, J., Livesey, N., Read, W., Froidevaux, L., Santee, M. L., Pumphrey, H. C., Lait, L. R., Twigg, L.

“…An intrusion of vortex edge air into the interior of the Arctic polar vortex was observed on the 31 January 2005 flight of the NASA DC‐8 aircraft. This…”
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Validating AIRS upper atmosphere water vapor retrievals using aircraft and balloon in situ measurements by Hagan, D. E., Webster, C. R., Farmer, C. B., May, R. D., Herman, R. L., Weinstock, E. M., Christensen, L. E., Lait, L. R., Newman, P. A.

“…This paper provides an initial assessment of the accuracy of the Atmospheric Infrared Sounder (AIRS) water vapor retrievals from 500 to 100 mbar. AIRS…”
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Severe and extensive denitrification in the 1999-2000 Arctic winter stratosphere by Popp, P. J., Northway, M. J., Holecek, J. C., Gao, R. S., Fahey, D. W., Elkins, J. W., Hurst, D. F., Romashkin, P. A., Toon, G. C., Sen, B., Schauffler, S. M., Salawitch, R. J., Webster, C. R., Herman, R. L., Jost, H., Bui, T. P., Newman, P. A., Lait, L. R.

“…Observations in the 1999–2000 Arctic winter stratosphere show the most severe and extensive denitrification ever observed in the northern hemisphere…”
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An analysis of large HNO3-containing particles sampled in the Arctic stratosphere during the winter of 1999/2000 by Northway, M. J., Gao, R. S., Popp, P. J., Holecek, J. C., Fahey, D. W., Carslaw, K. S., Tolbert, M. A., Lait, L. R., Dhaniyala, S., Flagan, R. C., Wennberg, P. O., Mahoney, M. J., Herman, R. L., Toon, G. C., Bui, T. P.

“…Large (>2 μm diameter) HNO3‐containing polar stratospheric cloud (PSC) particles were measured in situ by the NOAA NOy instrument on board the NASA ER‐2…”
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Observational evidence for the role of denitrification in Arctic stratospheric ozone loss by Gao, R. S., Richard, E. C., Popp, P. J., Toon, G. C., Hurst, D. F., Newman, P. A., Holecek, J. C., Northway, M. J., Fahey, D. W., Danilin, M. Y., Sen, B., Aikin, K., Romashkin, P. A., Elkins, J. W., Webster, C. R., Schauffler, S. M., Greenblatt, J. B., McElroy, C. T., Lait, L. R., Bui, T. P., Baumgardner, D.

“…Severe and extensive denitrification, chlorine activation, and photochemical ozone loss were observed throughout the lower stratosphere in the 1999–2000 Arctic…”
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Non-coincident inter-instrument comparisons of ozone measurements using quasi-conservative coordinates by Lait, L. R., Newman, P. A., Schoeberl, M. R., McGee, T., Twigg, L., Browell, E. V., Fenn, M. A., Grant, W. B., Butler, C. F., Bevilacqua, R., Davies, J., DeBacker, H., Andersen, S. B., Kyrö, E., Kivi, E., von der Gathen, P., Claude, H., Benesova, A., Skrivankova, P., Dorokhov, V., Zaitcev, I., Braathen, G., Gil, M., Litynska, Z., Moore, D., Gerding, M.

“…Ozone measurements from ozonesondes, AROTAL, DIAL, and POAM III instruments during the SOLVE-2/VINTERSOL period are composited in a time-varying,…”
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Nighttime OClO in the winter Arctic vortex by Canty, T., Rivière, E. D., Salawitch, R. J., Berthet, G., Renard, J.‐B., Pfeilsticker, K., Dorf, M., Butz, A., Bösch, H., Stimpfle, R. M., Wilmouth, D. M., Richard, E. C., Fahey, D. W., Popp, P. J., Schoeberl, M. R., Lait, L. R., Bui, T. P.

“…We show that a nighttime profile of OClO in the Arctic vortex during the winter of 2000 is overestimated, by nearly a factor of 2, using an isentropic…”
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A review of the Match technique as applied to AASE-2/EASOE and SOLVE/THESEO 2000 by Morris, G. A., Bojkov, B. R., Lait, L. R., Schoeberl, M. R.

“…We apply the NASA Goddard Trajectory Model to data from a series of ozonesondes to derive ozone loss rates in the lower stratosphere for the AASE-2/EASOE…”
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Dehydration and denitrification in the Arctic Polar Vortex during the 1995-1996 winter by Hintsa, E. J., Newman, P. A., Jonsson, H. H., Webster, C. R., May, R. D., Herman, R. L., Lait, L. R., Schoeberl, M. R., Elkins, J. W., Wamsley, P. R., Dutton, G. S., Bui, T. P., Kohn, D. W., Anderson, J. G.

“…Dehydration of more than 0.5 ppmv water was observed between 18 and 19 km (θ∼450–465 K) at the edge of the Arctic polar vortex on February 1, 1996. More than…”
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Ozone loss from quasi-conservative coordinate mapping during the 1999–2000 SOLVE/THESEO 2000 campaigns by Lait, L. R., Schoeberl, M. R., Newman, P. A., McGee, T., Burris, J., Browell, E. V., Richard, E., Braathen, G. O., Bojkov, B. R., Goutail, F., von der Gathen, P., Kyrö, E., Vaughan, G., Kelder, H., Kirkwood, S., Woods, P., Dorokhov, V., Zaitcev, I., Litynska, Z., Kois, B., Benesova, A., Skrivankova, P., De Backer, H., Davies, J., Jorgensen, T., Mikkelsen, I. S.

“…Ozone observations made by the Airborne Raman Ozone, Temperature, and Aerosol Lidar (AROTEL) and Differential Absorption Lidar (DIAL) on board the NASA DC‐8…”
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Activation of chlorine in sulfate aerosol as inferred from aircraft observations by Kawa, S. R., Newman, P. A., Lait, L. R., Schoeberl, M. R., Stimpfle, R. M., Kohn, D. W., Webster, C. R., May, R. D., Baumgardner, D., Dye, J. E., Wilson, J. C., Chan, K. R., Loewenstein, M.

“…The abundance of reactive chlorine in the lower stratosphere is observed to increase sharply with exposure to temperatures below about 195 K, a temperature…”
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Chemical Loss of Ozone in the Arctic Polar Vortex in the Winter of 1991-1992 by Salawitch, R. J., Wofsy, S. C., Gottlieb, E. W., Lait, L. R., Newman, P. A., Schoeberl, M. R., Loewenstein, M., Podolske, J. R., Strahan, S. E., Proffitt, M. H., Webster, C. R., May, R. D., Fahey, D. W., Baumgardner, D., Dye, J. E., Wilson, J. C., Kelly, K. K., Elkins, J. W., Chan, K. R., Anderson, J. G.

“…In situ measurements of chlorine monoxide, bromine monoxide, and ozone are extrapolated globally, with the use of meteorological tracers, to infer the loss…”
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The Seasonal Evolution of Reactive Chlorine in the Northern Hemisphere Stratosphere by Toohey, D. W., Avallone, L. M., Lait, L. R., Newman, P. A., Schoeberl, M. R., Fahey, D. W., Woodbridge, E. L., Anderson, J. G.

“…In situ measurements of chlorine monoxide (ClO) at mid- and high northern latitudes are reported for the period October 1991 to February 1992. As early as…”
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Inorganic chlorine partitioning in the summer lower stratosphere: Modeled and measured [ClONO2]/[HCl] during POLARIS by Voss, P. B., Stimpfle, R. M., Cohen, R. C., Hanisco, T. F., Bonne, G. P., Perkins, K. K., Lanzendorf, E. J., Anderson, J. G., Salawitch, R. J.

“…We examine inorganic chlorine (Cly) partitioning in the summer lower stratosphere using in situ ER-2 aircraft observations made during the Photochemistry of…”
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Chance encounter with a stratospheric kerosene rocket plume from Russia over California by Newman, P. A., Wilson, J. C., Ross, M. N., Brock, C. A., Sheridan, P. J., Schoeberl, M. R., Lait, L. R., Bui, T. P., Loewenstein, M., Podolske, J. R.

“…A high‐altitude aircraft flight on April 18, 1997, detected an enormous aerosol cloud at 20 km altitude near California (37°N). Not visually observed, the…”
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Stratospheric Meteorological Conditions in the Arctic Polar Vortex, 1991 to 1992 by Newman, P., Lait, L. R., Schoeberl, M., Nash, E. R., Kelly, K., Fahey, D. W., Nagatani, R., Toohey, D., Avallone, L., Anderson, J.

“…Stratospheric meteorological conditions during the Airborne Arctic Stratospheric Expedition II (AASE II) presented excellent observational opportunities from…”
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