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          Institute: MPI für Meteorologie     Collection: Atmosphere in the Earth System     Display Documents



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ID: 224152.0, MPI für Meteorologie / Atmosphere in the Earth System
Florida thunderstorms: A faucet of reactive nitrogen to the upper troposphere
Authors:Ridley, B.; Ott, L.; Pickering, K.; Emmons, L.; Montzka, D.; Weinheimer, A.; Knapp, D.; Grahek, F.; Li, L.; Heymsfield, G.; McGill, M.; Kucera, P.; Mahoney, M. J.; Baumgardner, D.; Schultz, Martin; Brasseur, Guy P.
Language:English
Date of Publication (YYYY-MM-DD):2004-09-08
Title of Journal:Journal of Geophysical Research-Atmospheres
Journal Abbrev.:J. Geophys. Res.-Atmos.
Volume:109
Issue / Number:D17
Sequence Number of Article:D17305
Review Status:Peer-review
Audience:Not Specified
Abstract / Description:During the July 2002 Cirrus Regional Study of Tropical Anvils and Cirrus Layers-Florida Area Cirrus Experiment (CRYSTAL-FACE), flights of a WB-57F aircraft revealed mixing ratios of nitric oxide 10 - 50 times background over distances of 25 - 175 km in the anvils of thunderstorms and in clear air downwind of storm systems due to lightning activity and possible transport from the boundary layer. Estimates of the total mass of NOx injected into the middle and upper troposphere differed considerably for a moderately versus highly electrically active storm system as expected. However, assuming that the total mass is dominated by lightning production, rough estimates of the production per average lightning flash for a moderately and a highly active storm also yielded quite different ranges of (0.33 - 0.66) x 10(26) and (1.7 - 2.3) x 10(26) molecules NO/flash, respectively. If the common assumption is made that intracloud flashes have 1/10th the NO production efficiency of cloud-to-ground (CG) flashes, the ranges of production for the moderately and highly active storms were (0.88 - 1.8) x 10(26) and (4.5 - 6.1) x 10(26) molecules NO/CG flash, respectively. The observed CG flash accumulations and NOx mass production estimate for the month of July 2002 over the Florida area are compared with results from the MOZART-2 global chemistry-transport model that uses a common lightning flash parameterization. Reasonable agreement was found after a correction to the lightning parameterization was made. Finally, broad-scale median mixing ratios of NO within anvils over Florida were significantly larger than found in storms previously investigated over Colorado and New Mexico
Free Keywords:NOx; nitric oxide; lightning; convection; thunderstorms; GLOBAL LIGHTNING DISTRIBUTIONS; MESOSCALE CONVECTIVE COMPLEX; OPTICAL TRANSIENT DETECTOR; CHEMICAL-TRANSPORT MODEL; JULY 10; NUMERICAL SIMULATIONS; NORTHERN MIDLATITUDES; TROPOPAUSE REGION; STERAO-A; OZONE
External Publication Status:published
Document Type:Article
Version Comment:Automatic journal name synchronization
Communicated by:Carola Kauhs
Affiliations:MPI für Meteorologie/The Atmosphere in the Earth System/Aerosols, Chemistry and Climate
External Affiliations:Natl Ctr Atmospher Res, Div Atmospher Chem, Boulder, CO 80307 USA.; Univ Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Mexico City 04510, DF, Mexico.; NASA, Goddard Space Flight Ctr, Mesoscale Atmospher Proc Branch, Greenbelt, MD 20771 USA.; Univ N Dakota, Dept Atmospher Sci, Grand Forks, ND 58202 USA.; Univ Maryland, Goddard Earth Sci & Technol Ctr, Baltimore, MD 21250 USA.; CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.; Univ Maryland, Dept Meteorol, College Pk, MD 20742 USA.
Identifiers:ISI:000223892200005
ISSN:0148-0227
DOI:10.1029/2004JD004769
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