Výsledky vyhledávání - "L. A. Del Negro"

The NOx−HNO3System in the Lower Stratosphere: Insights from In Situ Measurements and Implications of theJHNO3−[OH] Relationship

Autor: Paul O. Wennberg, Max Loewenstein, G. P. Bonne, L. A. Del Negro, Thomas F. Hanisco, James G. Anderson, L. C. Koch, Katherine K. Perkins, Paul B. Voss, T. P. Bui, Eric J. Hintsa, C. T. McElroy, R. M. Stimpfle, Ronald C. Cohen, Ross J. Salawitch, E. J. Lanzendorf, Ru-Shan Gao

Publikováno v: The Journal of Physical Chemistry A. 105:1521-1534

During the 1997 Photochemistry of Ozone Loss in the Arctic Region in Summer (POLARIS) mission, simultaneous in situ observations of NO_x and HO_x radicals, their precursors, and the radiation field were obtained in the lower stratosphere. We use thes

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9b4c6a1ddd647ea9e10a379b33c06ea1
https://doi.org/10.1021/jp002519n

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Comparison of MkIV balloon and ER-2 aircraft measurements of atmospheric trace gases

Publikováno v: Journal of Geophysical Research: Atmospheres. 104:26779-26790

On May 8, 1997, vertical profiles of over 30 different gases were measured remotely in solar occultation by the Jet Propulsion Laboratory MkIV Interferometer during a balloon flight launched from Fairbanks, Alaska. These gases included H 2 O, N 2 O,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ee1d717a3018ad6273005f29e50da1e6
https://doi.org/10.1029/1999jd900379

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NOypartitioning from measurements of nitrogen and hydrogen radicals in the upper troposphere

Publikováno v: Geophysical Research Letters. 26:51-54

Recent studies using NO, NOy, OH and HO2 (HOx) observations have postulated acetone and convection of peroxides as significant sources of HOx in the upper troposphere (UT). This work focuses on the effect these additional HOx sources have on the mode

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bb8ebb4242605c2197ea3d1738199026
https://doi.org/10.1029/1998gl900219

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Hydrogen Radicals, Nitrogen Radicals, and the Production of O 3 in the Upper Troposphere

Publikováno v: Science. 279:49-53

The concentrations of the hydrogen radicals OH and HO 2 in the middle and upper troposphere were measured simultaneously with those of NO, O 3 , CO, H 2 O, CH 4 , non-methane hydrocarbons, and with the ultraviolet and visible radiation field. The dat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::785693cf2104a6f6443853b08daf3213
https://doi.org/10.1126/science.279.5347.49

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Evaluating the role of NAT, NAD, and liquid H2SO4/H2O/HNO3solutions in Antarctic polar stratospheric cloud aerosol: Observations and implications

Publikováno v: Journal of Geophysical Research: Atmospheres. 102:13255-13282

Airborne measurements of total reactive nitrogen (NOy) and polar stratospheric cloud (PSC) aerosol particles were made in the Antarctic (68°S) as part of the NASA Airborne Southern Hemisphere Ozone Experiment/Measurements for Assessing the Effects o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9d72994005fd56c16b9c39fad70dc5a8
https://doi.org/10.1029/97jd00764

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Measurements of the NOy-N2O correlation in the lower stratosphere: Latitudinal and seasonal changes and model comparisons

Autor: Cynthia D. Nevison, J. R. Podolske, S. G. Donnelly, E. R. Keim, Malcolm K. W. Ko, L. A. Del Negro, Sean C. Solomon, K. R. Chan, C. J. Scott, D. K. Weisenstein, Ru-Shan Gao, Karen H. Rosenlof, R. C. Wamsley, David W. Fahey, Max Loewenstein, E. L. Woodbridge

Publikováno v: Journal of Geophysical Research: Atmospheres. 102:13193-13212

The tracer species nitrous oxide, N2O, and the reactive nitrogen reservoir, NOy, were measured in situ using instrumentation carried aboard the NASA ER-2 high altitude aircraft as part of the NASA Airborne Southern Hemisphere Ozone Expedition/Measure

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f65238311a7ba6ec156f915f0cab9a53
https://doi.org/10.1029/96jd03921

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Partitioning of the reactive nitrogen reservoir in the lower stratosphere of the southern hemisphere: Observations and modeling

Publikováno v: Journal of Geophysical Research: Atmospheres. 102:3935-3949

Measurements of nitric oxide (NO), nitrogen dioxide (NO2), and total reactive nitrogen (NOy = NO + NO2 + NO3 + HNO3 + ClONO2 + 2N2O5 + …) were made during austral fall, winter, and spring 1994 as part of the NASA Airborne Southern Hemisphere Ozone

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::75d52bd11566a5f09107ed3513da5d70
https://doi.org/10.1029/96jd01967

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The role of HOxin super- and subsonic aircraft exhaust plumes

Autor: Thomas F. Hanisco, Paul O. Wennberg, L. A. Del Negro, David W. Fahey, S. G. Donnelly, E. R. Keim, Ronald C. Cohen, Ross J. Salawitch, K. K. Kelly, James G. Anderson, R. C. Wamsley, R. S. Gao, Michael H. Proffitt

Publikováno v: Geophysical Research Letters. 24:65-68

The generation of sulfuric acid aerosols in aircraft exhaust has emerged as a critical issue in determining the impact of supersonic aircraft on stratospheric ozone. It has long been held that the first step in the mechanism of aerosol formation is t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0390e0dbf3a423ec17ca7571c819b403
https://doi.org/10.1029/96gl03724

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Observations of large reductions in the NO/NOyratio near the mid-latitude tropopause and the role of heterogeneous chemistry

Publikováno v: Geophysical Research Letters. 23:3223-3226

During the 1993 NASA Stratospheric Photochemistry, Aerosols and Dynamics Expedition (SPADE), anomalously low nitric oxide (NO) was found in a distinct sunlit layer located above the mid-latitude tropopause. The presence of a significant amount of rea

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b5580f5e115fb79196d0551ee34bb455
https://doi.org/10.1029/96gl02593

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