Výsledky vyhledávání - "W. H. Pollock"

Biomass Burning as a Source of Atmospheric Gases CO, H2, N2O, NO, CH3Cl and COS

Autor: W. H. Pollock, Paul J. Crutzen, Leroy E. Heidt, Wolfgang Seiler, Joseph P. Krasnec

Publikováno v: Paul J. Crutzen: A Pioneer on Atmospheric Chemistry and Climate Change in the Anthropocene ISBN: 9783319274591

The potential importance of deforestation and biomass burning for the atmospheric CO2 cycle has received much attention and caused some controversy. Biomass burning can contribute extensively to the budgets of several gases which are important in atm

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::65522cb30b3290bf8e4ab50229e000bb
https://doi.org/10.1007/978-3-319-27460-7_4

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Methyl halide emissions from savanna fires in southern Africa

Autor: G. Helas, W. H. Pollock, D. Scharffe, Meinrat O. Andreae, G. W. Harris, M. Welling, Willy Maenhaut, Elliot Atlas, G. Schebeske, Ralf Koppmann, A. de Kock, Jochen Rudolph, S. Manø

Publikováno v: Journal of Geophysical Research: Atmospheres. 101:23603-23613

The methyl halides, methyl chloride (CH3Cl), methyl bromide (CH3Br), and methyl iodide (CH3I), were measured in regional air samples and smoke from savanna fires in southern Africa during the Southern Africa Fire-Atmosphere Research Initiative-92 (SA

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b90907b0c6f09cc827e167e26947204c
https://doi.org/10.1029/95jd01733

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On the age of stratospheric air and inorganic chlorine and bromine release

Autor: Sue M. Schauffler, John S. Daniel, L. E. Heidt, Stanley C. Solomon, W. H. Pollock, A. Weaver, Elliot Atlas, Rolando R. Garcia, J. F. Vedder

Publikováno v: Journal of Geophysical Research: Atmospheres. 101:16757-16770

We estimate the average transport time from the tropical tropopause to various regions of the northern hemisphere lower stratosphere (stratospheric age) using simultaneous mixing ratio measurements of CFC-115 and CO2 measured by the Whole Air Sampler

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b076d73dd1cf7842335fe46ff00a5d98
https://doi.org/10.1029/96jd01167

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Atmospheric distributions of HCFC 141b

Autor: W. H. Pollock, L. E. Heidt, Elliot Atlas, J. S. Daniel, Sue M. Schauffler

Publikováno v: Geophysical Research Letters. 22:819-822

In recent years, HCFC 141b (CH{sub 3}CCl{sub 2}F) has become commercially available as a replacement for CFC 11 (CCl{sub 3}F) in closed-cell foam blowing applications and as a partial replacement for CFC 113 (CCl{sub 2}FCClF{sub 2}) in solvent and cl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d122ab529527d8bb8c0ea6abe1f6c4db
https://doi.org/10.1029/95gl00376

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In situ measurements of BrO During AASE II

Autor: Sue M. Schauffler, K. R. Chan, Linnea M. Avallone, Elliot Atlas, Darin W. Toohey, L. E. Heidt, W. H. Pollock

Publikováno v: Geophysical Research Letters. 22:831-834

BrO measured from the NASA ER-2 during Airborne Arctic Stratospheric Expedition (AASE) II exhibited a mean value (for 20-minute averages) of 5.4 +/- 0.3 pptv, with a standard deviation of 3.1 pptv. Ratios of BrO to available inorganic bromine (Br(sub

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::22a9affad3ad6396e257ac2879a8fc78
https://doi.org/10.1029/95gl00393

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Measurements of halogenated organic compounds near the tropical tropopause

Autor: J. F. Vedder, Susan Solomon, T. M. Gilpin, R. Lueb, L. E. Heidt, Sue M. Schauffler, W. H. Pollock, Elliot Atlas

Publikováno v: Geophysical Research Letters. 20:2567-2570

The amount of organic chlorine and bromine entering the stratosphere have a direct influence on the magnitude of chlorine and bromine catalyzed ozone losses. Twelve organic chlorine species and five organic bromine species were measured from 12 sampl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f5e19c1fd621dc112fca76efed972212
https://doi.org/10.1029/93gl02840

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Redistribution of reactive odd nitrogen in the lower Arctic stratosphere

Autor: J. F. Vedder, David W. Fahey, M. A. Carroll, D. D. Montzka, W. H. Pollock, L. E. Heidt, Gerhard Hübler, Adrian F. Tuck, K. K. Kelly, Gerald L. Gregory

Publikováno v: Geophysical Research Letters. 17:453-456

In-situ measurements of total reactive odd nitrogen NO(y), were made from the NASA DC-8 aircraft in the lower arctic stratosphere during the 1989 Airborne Arctic Stratospheric Expedition. Throughout January and February, NO(y) mixing ratios were typi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c3df411071c500dceab83ceb3c5ac428
https://doi.org/10.1029/gl017i004p00453

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Tritiated water vapor in the stratosphere: Vertical profiles and residence time

Autor: Franz Rohrer, Dieter H. Ehhalt, Sue M. Schauffler, W. H. Pollock

Publikováno v: Journal of Geophysical Research 107, D24 (2002). doi:10.1029/2001JD001343

[1] The historic and partly unpublished measurements of the tritium content in stratospheric water vapor made at the National Center for Atmospheric Research between 1975 and 1983 are reanalyzed. The resulting vertical profiles of the T content, main

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6e2692d9cc02a7d0d243fdfa824e4c3c
https://doi.org/10.1029/2001jd001343

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Estimates of total organic and inorganic chlorine in the lower stratosphere from in situ and flask measurements during AASE II

Autor: Jonathan M. Gilligan, David W. Fahey, Max Loewenstein, Christopher R. Webster, T. M. Gilpin, Sue M. Schauffler, J. R. Podolske, T. J. Baring, Stephen A. Montzka, L. E. Heidt, Randy D. May, Kristie A. Boering, Sean C. Solomon, Ross J. Salawitch, E. L. Woodbridge, James W. Elkins, W. H. Pollock, E. L. Atlas

Publikováno v: Journal of Geophysical Research. 100:3057

Aircraft sampling has provided extensive in situ and flask measurements of organic chlorine species in the lower stratosphere. The recent Airborne Arctic Stratospheric Expedition 2 (AASE 2) included two independent measurements of organic chlorine sp

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a5136c3bbeef5d0c5132f3e7e1e5a3ec
https://doi.org/10.1029/94jd02744

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Bromoalkane production by Antarctic ice algae

Autor: L. E. Heidt, W. T. Sturges, W. H. Pollock, Cornelius W. Sullivan, Russell C. Schnell

Publikováno v: Tellus B; Vol 45, No 2 (1993)

Ice microalgae, collected from the underside of annual sea ice in McMurdo Sound, Antarctica, were found to contain and release to seawater a number of brominated hydrocarbons. These included bromoform, dibromomethane, mixed bromochloromethanes, and m

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6fc58e092acd0099f97c97d423e882e0
https://doi.org/10.3402/tellusb.v45i2.15586

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