Search Results

You are looking at 1 - 10 of 5,155 items for :

  • Atmospheric composition x
  • Refine by Access: All Content x
Clear All
M. Hulin, F. Gheusi, M. Lothon, V. Pont, F. Lohou, M. Ramonet, M. Delmotte, S. Derrien, G. Athier, Y. Meyerfeld, Y. Bezombes, P. Augustin, and F. Ravetta

atmospheric chemical composition and variability have been studied extensively. However, this is not the case for the Pyrenees. Few measurement campaigns have been carried out, with the aim of documenting the influence of meteorological conditions on the atmospheric composition at the Pic du Midi (PDM) observatory: Atmospheric Pollution in the Pyrenees (PAP; Ezcurra et al. 2013 ), Pic 2005 ( Gheusi et al. 2011 ), and Pic 2010 ( Gheusi et al. 2016 ). Ezcurra et al. (2013) present experimental data from

Full access
P. B. Hays and R. G. Roble

NOWMBE~ 1968 P. B. HAYS AND R. G. ROBLE 1141Stellar Spectra and Atmospheric Composition P. B. HAYS AND R. G. ROBLEDept. of Aerospace t~ngineering, University of Michigan, Ann Arbor(Manuscript received 16 January 1968, in revised form 22 July 1968)ABSTRACT The distortions to the image and spectrum of a star being observed during occultation from a satellite arediscussed. The primary distortions are

Full access
Chelsea R. Thompson, Steven C. Wofsy, Michael J. Prather, Paul A. Newman, Thomas F. Hanisco, Thomas B. Ryerson, David W. Fahey, Eric C. Apel, Charles A. Brock, William H. Brune, Karl Froyd, Joseph M. Katich, Julie M. Nicely, Jeff Peischl, Eric Ray, Patrick R. Veres, Siyuan Wang, Hannah M. Allen, Elizabeth Asher, Huisheng Bian, Donald Blake, Ilann Bourgeois, John Budney, T. Paul Bui, Amy Butler, Pedro Campuzano-Jost, Cecilia Chang, Mian Chin, Róisín Commane, Gus Correa, John D. Crounse, Bruce Daube, Jack E. Dibb, Joshua P. DiGangi, Glenn S. Diskin, Maximilian Dollner, James W. Elkins, Arlene M. Fiore, Clare M. Flynn, Hao Guo, Samuel R. Hall, Reem A. Hannun, Alan Hills, Eric J. Hintsa, Alma Hodzic, Rebecca S. Hornbrook, L. Greg Huey, Jose L. Jimenez, Ralph F. Keeling, Michelle J. Kim, Agnieszka Kupc, Forrest Lacey, Leslie R. Lait, Jean-Francois Lamarque, Junhua Liu, Kathryn McKain, Simone Meinardi, David O. Miller, Stephen A. Montzka, Fred L. Moore, Eric J. Morgan, Daniel M. Murphy, Lee T. Murray, Benjamin A. Nault, J. Andrew Neuman, Louis Nguyen, Yenny Gonzalez, Andrew Rollins, Karen Rosenlof, Maryann Sargent, Gregory Schill, Joshua P. Schwarz, Jason M. St. Clair, Stephen D. Steenrod, Britton B. Stephens, Susan E. Strahan, Sarah A. Strode, Colm Sweeney, Alexander B. Thames, Kirk Ullmann, Nicholas Wagner, Rodney Weber, Bernadett Weinzierl, Paul O. Wennberg, Christina J. Williamson, Glenn M. Wolfe, and Linghan Zeng

The NASA Atmospheric Tomography (ATom) mission was a global-scale airborne campaign, flying over four seasons from August 2016 to May 2018, and funded through the NASA Earth Venture Suborbital-2 (EVS-2) program. ATom addresses gaps in our understanding of chemical composition, reactivity, and transport in the remote troposphere. Observations collected during ATom provide unique information to test and improve global chemistry–transport and chemistry–climate models (CTMs, CCMs) and to test and

Full access
V. Masson-Delmotte, S. Hou, A. Ekaykin, J. Jouzel, A. Aristarain, R. T. Bernardo, D. Bromwich, O. Cattani, M. Delmotte, S. Falourd, M. Frezzotti, H. Gallée, L. Genoni, E. Isaksson, A. Landais, M. M. Helsen, G. Hoffmann, J. Lopez, V. Morgan, H. Motoyama, D. Noone, H. Oerter, J. R. Petit, A. Royer, R. Uemura, G. A. Schmidt, E. Schlosser, J. C. Simões, E. J. Steig, B. Stenni, M. Stievenard, M. R. van den Broeke, R. S. W. van de Wal, W. J. van de Berg, F. Vimeux, and J. W. C. White

cooling path with prescribed initial evaporation and condensation conditions. Such models have been used to assess the impact of equilibrium and kinetic fractionation processes on the snowfall isotopic composition ( Merlivat and Jouzel 1979 ; Jouzel and Merlivat 1984 ). The second-order isotopic parameter deuterium excess d = δ D − 8 × δ 18 O ( Dansgaard 1964 ) is expected to be highly sensitive to kinetic effects occurring either during evaporation at the ocean surface or during atmospheric

Full access
Christiane Voigt, Jos Lelieveld, Hans Schlager, Johannes Schneider, Joachim Curtius, Ralf Meerkötter, Daniel Sauer, Luca Bugliaro, Birger Bohn, John N. Crowley, Thilo Erbertseder, Silke Groß, Valerian Hahn, Qiang Li, Mariano Mertens, Mira L. Pöhlker, Andrea Pozzer, Ulrich Schumann, Laura Tomsche, Jonathan Williams, Andreas Zahn, Meinrat Andreae, Stephan Borrmann, Tiziana Bräuer, Raphael Dörich, Andreas Dörnbrack, Achim Edtbauer, Lisa Ernle, Horst Fischer, Andreas Giez, Manuel Granzin, Volker Grewe, Hartwig Harder, Martin Heinritzi, Bruna A. Holanda, Patrick Jöckel, Katharina Kaiser, Ovid O. Krüger, Johannes Lucke, Andreas Marsing, Anna Martin, Sigrun Matthes, Christopher Pöhlker, Ulrich Pöschl, Simon Reifenberg, Akima Ringsdorf, Monika Scheibe, Ivan Tadic, Marcel Zauner-Wieczorek, Rolf Henke, and Markus Rapp

Regulations to limit the spread of the COVID-19 pandemic led to substantial changes in human life, industrial productivity, and mobility, which caused reductions in emissions from industry and ground and airborne transportation ( Venter et al. 2020 ). Hence, the lockdown period offered the unique opportunity to directly measure the effects of reduced pollution emissions on atmospheric composition and thereby challenge our understanding of the anthropogenically perturbed chemical and physical

Open access
Christian E. Junge

Avccsr 1954 CHRISTIAN E.. JUNGE323THE CHEMICAL COMPOSITION OF ATMOSPHERIC AEROSOLS, I : MEASUREMENTS AT ROUND HILL FIELD STATION, JUNE- JULY 1953By Christian E. JungeAir Force Cambridge Research Center(Original manuscript received 5 October 1953 ; revised manuscript received 4 February 1954)ABSTRACTNew data conceriiiiig the chemical composition of atmospheric aerosol particles in two radial size-ranges,0.08 < r < 0.8 p and 0.8 < r < 8 ,A, were obtained during a four

Full access
G. Chiodo, L. M. Polvani, D. R. Marsh, A. Stenke, W. Ball, E. Rozanov, S. Muthers, and K. Tsigaridis

1. Introduction An accurate quantification of the effects of anthropogenic emissions on the ozone layer is a key step toward making accurate predictions of the future ozone evolution. Assessing the ozone response to anthropogenic forcings is also a step toward improved understanding of the coupling between atmospheric composition and climate ( Isaksen et al. 2009 ). There is robust modeling evidence suggesting that anthropogenic greenhouse gases (GHGs), via their influences on stratospheric

Full access
Makiko Sato and James E. Hansen

VOL. 36, NO. 7 JOURNAL OF THE ATMOSPHERIC SCIENCES JULY 1979Jupiter's Atmospherfic Composition and Cloud $~r~c~ure Deduced from Absorption Bands in Reflected Stmlight MAK1KO SATO AND JAMES E. HANSENNASA Goddard Institute for Space Studies, Goddard Space Flight Center, New York, NY 10025(Manuscript received 2 March 1979) ABSTRACT The spectrum of sunlight reflected bY

Full access
S. Kaspari, P. A. Mayewski, M. Handley, S. Kang, S. Hou, S. Sneed, K. Maasch, and D. Qin

appropriately chosen sites are an ideal archive for reconstructing past atmospheric dust aerosol loading, transport, and chemical composition prior to the instrumental record. Ice cores provide high-resolution, well-preserved, multiparameter archives of the atmospheric signature from remote regions, including information about past temperature, precipitation, atmospheric circulation, and atmospheric chemistry. The glaciated, high-elevation mountain regions in Asia are located downwind or in the vicinity of

Full access
Manman Ma, Yu Zhen, and Tiezhu Mi

indicated that the diversity of aerosol bacterial communities was the highest at the YS3 site and lowest at the YS2 site. Aerosol bacterial community diversity showed the trend, from greatest to least: Yellow Sea, northwestern Pacific Ocean, and the Bohai Sea. Table 2. Atmospheric bacterial community diversity in marine aerosols. Fig . 2. Rarefaction curves of aerosol samples (a) from different sites and (b) of different particle sizes. b. Bacterial community composition in marine bioaerosols A total

Full access