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Full-Text Articles in Atmospheric Sciences
Longpath Doas Observations Of Surface Bro At Summit, Greenland, J Stutz, J L. Thomas, S C. Hurlock, M Schneider, R Von Glasow, M Piot, K Gorham, John F. Burkhart, Luke D. Ziemba, Jack E. Dibb, Barry Lefer
Longpath Doas Observations Of Surface Bro At Summit, Greenland, J Stutz, J L. Thomas, S C. Hurlock, M Schneider, R Von Glasow, M Piot, K Gorham, John F. Burkhart, Luke D. Ziemba, Jack E. Dibb, Barry Lefer
Earth Sciences
Reactive halogens, and in particular bromine oxide (BrO), have frequently been observed in regions with large halide reservoirs, for example during bromine catalyzed coastal polar ozone depletion events. Much less is known about the presence and impact of reactive halogens in areas without obvious halide reservoirs, such as the polar ice sheets or continental snow.
We report the first LP-DOAS measurements of BrO at Summit research station in the center of the Greenland ice sheet at an altitude of 3200 m. BrO mixing ratios in May 2007 and June 2008 were typically between 1–3 pmol mol−1, with maxima …
Observations Of Hydroxyl And Peroxy Radicals And The Impact Of Bro At Summit, Greenland In 2007 And 2008, J Liao, L Gregory Huey, D Tanner, N Brough, Steve Brooks, Jack E. Dibb, J Stutz, J L. Thomas, Barry Lefer, C Haman, K Gorham
Observations Of Hydroxyl And Peroxy Radicals And The Impact Of Bro At Summit, Greenland In 2007 And 2008, J Liao, L Gregory Huey, D Tanner, N Brough, Steve Brooks, Jack E. Dibb, J Stutz, J L. Thomas, Barry Lefer, C Haman, K Gorham
Earth Sciences
The Greenland Summit Halogen-HOx (GSHOX) Campaign was performed in spring 2007 and summer 2008 to investigate the impact of halogens on HOx (= OH + HO2) cycling above the Greenland Ice Sheet. Chemical species including hydroxyl and peroxy radicals (OH and HO2+ RO2), ozone (O3), nitrogen oxide (NO), nitric acid (HNO3), nitrous acid (HONO), reactive gaseous mercury (RGM), and bromine oxide (BrO) were measured during the campaign. The median midday values of HO2 + RO2 and OH concentrations observed by chemical ionization mass spectrometry (CIMS) were …
In Situ Measurements Of Tropospheric Volcanic Plumes In Ecuador And Colombia During Tc, S A. Carn, K D. Froyd, B E. Anderson, Paul Wennberg, John D. Crounse, K Spencer, Jack E. Dibb, N A. Krotkov, E V. Browell, Jonathan Hair, Glenn S. Diskin, G W. Sachse
In Situ Measurements Of Tropospheric Volcanic Plumes In Ecuador And Colombia During Tc, S A. Carn, K D. Froyd, B E. Anderson, Paul Wennberg, John D. Crounse, K Spencer, Jack E. Dibb, N A. Krotkov, E V. Browell, Jonathan Hair, Glenn S. Diskin, G W. Sachse
Earth Sciences
A NASA DC‐8 research aircraft penetrated tropospheric gas and aerosol plumes sourced from active volcanoes in Ecuador and Colombia during the Tropical Composition, Cloud and Climate Coupling (TC4 ) mission in July–August 2007. The likely source volcanoes were Tungurahua (Ecuador) and Nevado del Huila (Colombia). The TC4 data provide rare insight into the chemistry of volcanic plumes in the tropical troposphere and permit a comparison of SO2 column amounts measured by the Ozone Monitoring Instrument (OMI) on the Aura satellite with in situ SO2 measurements. Elevated concentrations of SO2, sulfate aerosol, and particles were measured by DC‐8 instrumentation in volcanic …
Modeling Chemistry In And Above Snow At Summit, Greenland – Part 1: Model Description And Results, J L. Thomas, J Stutz, Barry Lefer, L Gregory Huey, K Toyota, Jack E. Dibb, R Von Glasow
Modeling Chemistry In And Above Snow At Summit, Greenland – Part 1: Model Description And Results, J L. Thomas, J Stutz, Barry Lefer, L Gregory Huey, K Toyota, Jack E. Dibb, R Von Glasow
Earth Sciences
Sun-lit snow is increasingly recognized as a chemical reactor that plays an active role in uptake, transformation, and release of atmospheric trace gases. Snow is known to influence boundary layer air on a local scale, and given the large global surface coverage of snow may also be significant on regional and global scales. We present a new detailed one-dimensional snow chemistry module that has been coupled to the 1-D atmospheric boundary layer model MISTRA. The new 1-D snow module, which is dynamically coupled to the overlaying atmospheric model, includes heat transport in the snowpack, molecular diffusion, and wind pumping of …
Multi-Scale Modeling Study Of The Source Contributions To Near-Surface Ozone And Sulfur Oxides Levels Over California During The Arctas-Carb Period, M. Huang, Gregory R. Carmichael, S N. Spak, B Adhikary, S Kulkarni, Y Cheng, C Wei, Y Tang, A D'Allura, Paul Wennberg, L Gregory Huey, Jack E. Dibb, Jose L. Jimenez, Michael J. Cubison, Andrew Weinheimer, Ajith P. Kaduwela, Chenxia Cai, M Wong, R Bradley Pierce, J Al-Saadi, David G. Streets, Q Zhang
Multi-Scale Modeling Study Of The Source Contributions To Near-Surface Ozone And Sulfur Oxides Levels Over California During The Arctas-Carb Period, M. Huang, Gregory R. Carmichael, S N. Spak, B Adhikary, S Kulkarni, Y Cheng, C Wei, Y Tang, A D'Allura, Paul Wennberg, L Gregory Huey, Jack E. Dibb, Jose L. Jimenez, Michael J. Cubison, Andrew Weinheimer, Ajith P. Kaduwela, Chenxia Cai, M Wong, R Bradley Pierce, J Al-Saadi, David G. Streets, Q Zhang
Earth Sciences
Chronic high surface ozone (O3) levels and the increasing sulfur oxides (SOx = SO2+SO4) ambient concentrations over South Coast (SC) and other areas of California (CA) are affected by both local emissions and long-range transport. In this paper, multi-scale tracer, full-chemistry and adjoint simulations using the STEM atmospheric chemistry model are conducted to assess the contribution of local emission sourcesto SC O3 and to evaluate the impacts of transported sulfur and local emissions on the SC sulfur budgetduring the ARCTAS-CARB experiment period in 2008. Sensitivity simulations quantify contributions of biogenic and fire …