Zobrazeno 1 - 10
of 23
pro vyhledávání: '"C R, Webster"'
Autor:
C. C. Camy-Peyret, H. Oelhaf, C. R. Webster, U. Schmidt, R. J. Salawitch, R. Müller, S. Tilmes, J. M. Russell III
Publikováno v:
Atmospheric Chemistry and Physics, Vol 8, Iss 7, Pp 1897-1910 (2008)
Chemical ozone loss in winter 1991–1992 is recalculated based on observations of the HALOE satellite instrument, Version 19, ER-2 aircraft measurements and balloon data. HALOE satellite observations are shown to be reliable in the lower stratospher
Externí odkaz:
https://doaj.org/article/b1111318dd854f6fba64765600a4870d
Autor:
W. Feng, M. P. Chipperfield, S. Davies, B. Sen, G. Toon, J. F. Blavier, C. R. Webster, C. M. Volk, A. Ulanovsky, F. Ravegnani, P. von der Gathen, H. Jost, E. C. Richard, H. Claude
Publikováno v:
Atmospheric Chemistry and Physics, Vol 5, Iss 1, Pp 139-152 (2005)
We have used the SLIMCAT 3-D off-line chemical transport model (CTM) to quantify the Arctic chemical ozone loss in the year 2002/2003 and compare it with similar calculations for the winters 1999/2000 and 2003/2004. Recent changes to the CTM have imp
Externí odkaz:
https://doaj.org/article/700820d56ca84210993731eef7b70495
Autor:
P R, Mahaffy, C R, Webster, J C, Stern, A E, Brunner, S K, Atreya, P G, Conrad, S, Domagal-Goldman, J L, Eigenbrode, G J, Flesch, L E, Christensen, H B, Franz, C, Freissinet, D P, Glavin, J P, Grotzinger, J H, Jones, L A, Leshin, C, Malespin, A C, McAdam, D W, Ming, R, Navarro-Gonzalez, P B, Niles, T, Owen, A A, Pavlov, A, Steele, M G, Trainer, K H, Williford, J J, Wray, María-Paz, Zorzano Mier
Publikováno v:
Science (New York, N.Y.). 347(6220)
The deuterium-to-hydrogen (D/H) ratio in strongly bound water or hydroxyl groups in ancient martian clays retains the imprint of the water of formation of these minerals. Curiosity's Sample Analysis at Mars (SAM) experiment measured thermally evolved
Autor:
A. E. Andrews, K. A. Boering, B. C. Daube, S. C. Wofsy, M. Loewenstein, H. Jost, J. R. Podolske, C. R. Webster, R. L. Herman, D. C. Scott, G. J. Flesch, E. J. Moyer, J. W. Elkins, G. S. Dutton, D. F. Hurst, F. L. Moore, E. A. Ray, P. A. Romashkin, S. E. Strahan
Publikováno v:
Journal of Geophysical Research: Atmospheres. 106:32295-32314
Autor:
Hope A. Michelsen, K. K. Kelly, Darrel Baumgardner, Max Loewenstein, Michael R. Gunson, G. L. Manney, Michael H. Proffitt, R. D. May, James R. Podolske, Steven C. Wofsy, C. R. Webster, Glenn K. Yue
Publikováno v:
Geophysical Research Letters. 26:291-294
We have compared measured abundances of NOy, O3, H2O, CH4, HCl, and N2O from ATMOS and aerosol from SAGE II from inside and outside the Arctic vortex with in situ observations from the SPADE aircraft campaign in April/May 1993. When the distinction b
Autor:
Eric J. Hintsa, E. R. Keim, James C. Wilson, Elliot Atlas, R. S. Gao, Michael H. Proffitt, J. J. Margitan, S. G. Donnelly, Thomas F. Hanisco, Frank Flocke, L. A. Del Negro, Ross J. Salawitch, C. T. McElroy, D. C. Scott, R. C. Wamsley, T. P. Bui, C. R. Webster, E. J. Lanzendorf, Lyatt Jaeglé, R. D. May, Stuart A. McKeen, David W. Fahey
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
Autor:
James W. Elkins, Mark R. Schoeberl, P. R. Wamsley, D. W. Kohn, Eric J. Hintsa, Robert L. Herman, R. D. May, Haflidi Jonsson, T. P. Bui, James G. Anderson, C. R. Webster, Paul A. Newman, Leslie R. Lait, G. S. Dutton
Publikováno v:
Geophysical Research Letters. 25:501-504
Dehydration of more than 0.5 ppmv water was observed between 18 and 19 km (theta approximately 450-465 K) at the edge of the Arctic polar vortex on February 1, 1996. More than half the reactive nitrogen (NO(y)) had also been removed, with layers of e
Autor:
David W. Fahey, Robert L. Herman, E. J. Lanzendorf, E. R. Keim, Paul O. Wennberg, Thomas F. Hanisco, Elliot Atlas, Ruixuan Gao, C. T. McElroy, L. A. Del Negro, Ross J. Salawitch, Eric J. Hintsa, M. H. Proffitt, J. J. Margitan, D. J. Jacob, S. G. Donnelly, S. A. McKeen, Frank Flocke, C. R. Webster, R. D. May, Lyatt Jaeglé, T. P. Bui, James G. Anderson, S. M. Schauffler
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
Autor:
K. R. Chan, Thomas F. Hanisco, S. C. Wofsy, James R. Podolske, R. D. May, Susan Solomon, James C. Wilson, K. A. Boering, E. R. Keim, Paul O. Wennberg, R. S. Gao, David W. Fahey, L. A. Del Negro, Max Loewenstein, Bruce C. Daube, Charles A. Brock, C. R. Webster, E. L. Woodbridge, Haflidi Jonsson, Ross J. Salawitch, K. K. Kelly, N. Louisnard, S. E. Anthony, R. C. Wamsley, Richard C. Miake-Lye, S. G. Donnelly
Publikováno v:
Science. 270:70-74
Emission indices of reactive gases and particles were determined from measurements in the exhaust plume of a Concorde aircraft cruising at supersonic speeds in the stratosphere. Values for NO x (sum of NO and NO 2 ) agree well with ground-based estim
Autor:
M. R. Gunson, Lyatt Jaeglé, R. M. Stimpfle, R. D. May, Stanley P. Sander, James M. Russell, C. R. Webster, J. P. Koplow, H. Hu, Ross J. Salawitch, G. C. Toon, Hope A. Michelsen
Publikováno v:
Geophysical Research Letters. 21:2575-2578
Concentrations of HCl measurements in the lower stratosphere in 1993 by the ALIAS instrument on the ER-2 aircraft reveal that only 40% of inorganic chlorine (Cl(y), inferred from in situ measurements of organic chlorinated sources gases) is present a