Search Results - "ROSCOE, H. K."

The impact of polar stratospheric ozone loss on Southern Hemisphere stratospheric circulation and climate by Keeble, J, Braesicke, P, Abraham, N. L, Roscoe, H. K, Pyle, J. A

“…The impact of polar stratospheric ozone loss resulting from chlorine activation on polar stratospheric clouds is examined using a pair of model integrations…”
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Iodine emissions from the sea ice of the Weddell Sea by Atkinson, H. M, Huang, R.-J, Chance, R, Roscoe, H. K, Hughes, C, Davison, B, Schönhardt, A, Mahajan, A. S, Saiz-Lopez, A, Hoffmann, T, Liss, P. S

“…Iodine compounds were measured above, below and within the sea ice of the Weddell Sea during a cruise in 2009, to make progress in elucidating the mechanism of…”
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Atmospheric nitrogen oxides (NO and NO 2 ) at Dome C, East Antarctica, during the OPALE campaign by Frey, M M, Roscoe, H K, Kukui, A, Savarino, J, France, J L, King, M D, Legrand, M, Preunkert, S

“…Mixing ratios of the atmospheric nitrogen oxides NO and NO2 were measured as part of the OPALE (Oxidant Production in Antarctic Lands & Export) campaign at…”
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Antarctic ozone loss in 1979–2010: first sign of ozone recovery by Kuttippurath, J, Lefèvre, F, Pommereau, J.-P, Roscoe, H. K, Goutail, F, Pazmiño, A, Shanklin, J. D

“…A long-term ozone loss time series is necessary to understand the evolution of ozone in Antarctica. Therefore, we construct the time series using ground-based,…”
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Frost flowers in the laboratory: Growth, characteristics, aerosol, and the underlying sea ice by Roscoe, H. K., Brooks, B., Jackson, A. V., Smith, M. H., Walker, S. J., Obbard, R. W., Wolff, E. W.

“…In the laboratory, we have investigated the growth and composition of frost flowers. Their ionic composition has shown little difference from those of field…”
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Inclusion of mountain-wave-induced cooling for the formation of PSCs over the Antarctic Peninsula in a chemistry–climate model by Orr, A, Hosking, J. S, Hoffmann, L, Keeble, J, Dean, S. M, Roscoe, H. K, Abraham, N. L, Vosper, S, Braesicke, P

“…An important source of polar stratospheric clouds (PSCs), which play a crucial role in controlling polar stratospheric ozone depletion, is from the temperature…”
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Frost flowers on sea ice as a source of sea salt and their influence on tropospheric halogen chemistry by Kaleschke, L., Richter, A., Burrows, J., Afe, O., Heygster, G., Notholt, J., Rankin, A. M., Roscoe, H. K., Hollwedel, J., Wagner, T., Jacobi, H.-W.

“…Frost flowers grow on newly‐formed sea ice from a saturated water vapour layer. They provide a large effective surface area and a reservoir of sea salt ions in…”
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Observations of iodine monoxide columns from satellite by Schönhardt, A., Richter, A., Wittrock, F., Kirk, H., Oetjen, H., Roscoe, H. K., Burrows, J. P.

“…Iodine species in the troposphere are linked to ozone depletion and new particle formation. In this study, a full year of iodine monoxide (IO) columns…”
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BrO, blizzards, and drivers of polar tropospheric ozone depletion events by Jones, A. E., Anderson, P. S., Begoin, M., Brough, N., Hutterli, M. A., Marshall, G. J., Richter, A., Roscoe, H. K., Wolff, E. W.

“…The source of bromine that drives polar boundary layer ozone depletion events (ODEs) is still open to some debate. While ODEs are generally noted to form under…”
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Vertical structure of Antarctic tropospheric ozone depletion events: characteristics and broader implications by Jones, A. E., Anderson, P. S., Wolff, E. W., Roscoe, H. K., Marshall, G. J., Richter, A., Brough, N., Colwell, S. R.

“…The majority of tropospheric ozone depletion event (ODE) studies have focussed on time-series measurements, with comparatively few studies of the vertical…”
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Summertime NOx measurements during the CHABLIS campaign: can source and sink estimates unravel observed diurnal cycles? by Bauguitte, S J.-B, Bloss, W J, Evans, M J, Salmon, R A, Ander son, P S, Jones, A E, Lee, J D, Saiz-Lopez, A, Roscoe, H K, Wolff, E W, Plane, J M. C

“…NOx measurements were conducted at the Halley Research Station, coastal Antarctica, during the austral summer period 1 January-10 February 2005. A clear NOx…”
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A global stratospheric bromine monoxide climatology based on the BASCOE chemical transport model by Theys, N., Van Roozendael, M., Errera, Q., Hendrick, F., Daerden, F., Chabrillat, S., Dorf, M., Pfeilsticker, K., Rozanov, A., Lotz, W., Burrows, J. P., Lambert, J.-C., Goutail, F., Roscoe, H. K., De Mazière, M.

“…A new climatology of stratospheric BrO profiles based on a parameterization using dynamical and chemical indicators has been developed, with the aim to apply…”
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Estimation of Antarctic ozone loss from ground-based total column measurements by Kuttippurath, J., Goutail, F., Pommereau, J.-P., Lefèvre, F., Roscoe, H. K., Pazmiño, A., Feng, W., Chipperfield, M. P., Godin-Beekmann, S.

“…The passive tracer method is used to estimate ozone loss from ground-based measurements in the Antarctic. A sensitivity study shows that the ozone depletion…”
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Chemistry of the Antarctic Boundary Layer and the Interface with Snow: an overview of the CHABLIS campaign by Jones, A. E., Wolff, E. W., Salmon, R. A., Bauguitte, S. J.-B., Roscoe, H. K., Anderson, P. S., Ames, D., Clemitshaw, K. C., Fleming, Z. L., Bloss, W. J., Heard, D. E., Lee, J. D., Read, K. A., Hamer, P., Shallcross, D. E., Jackson, A. V., Walker, S. L., Lewis, A. C., Mills, G. P., Plane, J. M. C., Saiz-Lopez, A., Sturges, W. T., Worton, D. R.

“…CHABLIS (Chemistry of the Antarctic Boundary Layer and the Interface with Snow) was a collaborative UK research project aimed at probing the detailed chemistry…”
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Polar tropospheric ozone depletion events observed in the International Geophysical Year of 1958 by Roscoe, H. K., Roscoe, J.

“…The Royal Society expedition to Antarctica established a base at Halley Bay, in support of the International Geophysical Year of 1957–1958. Surface ozone was…”
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A network of autonomous surface ozone monitors in Antarctica: technical description and first results by Bauguitte, S. J.-B., Brough, N., Frey, M. M., Jones, A. E., Maxfield, D. J., Roscoe, H. K., Rose, M. C., Wolff, E. W.

“…A suite of 10 autonomous ozone monitoring units, each powered using renewable energy, was developed and built to study surface ozone in Antarctica during the…”
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Low potential for stratospheric dynamical change to be implicated in the large winter warming in the central Antarctic Peninsula by Roscoe, H. K., Marshall, G. J., King, J. C.

“…Stratospheric change associated with the Antarctic ozone hole is clearly implicated in changing surface climate near 65°S in late summer, in both measurements…”
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A new software suite for NO2 vertical profile retrieval from ground-based zenith-sky spectrometers by Denis, L, Roscoe, H K, Chipperfield, M P, Van Roozendael, M, Goutail, F

“…Here we present an operational method to improve accuracy and information content of ground-based measurements of stratospheric NO2. The motive is to improve…”
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A cautionary note on the use of EESC-based regression analysis for ozone trend studies by Kuttippurath, J., Bodeker, G. E., Roscoe, H. K., Nair, P. J.

“…Equivalent effective stratospheric chlorine (EESC) construct of ozone regression models attributes ozone changes to EESC changes using a single value of the…”
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Possible descent across the “Tropopause” in Antarctic winter by Roscoe, H.K.

“…Descent of air from stratosphere to troposphere in Antarctic winter is proposed to be feasible, because of forcing from above by subsidence plus wave-breaking,…”
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