Sentences with phrase «ozone chemistry on»

Sassi, F., B.A. Boville, D. Kinnison, and R.R. Garica, 2005: The effects of interactive ozone chemistry on simulations of the middle atmosphere, Geophys.

Not exact matches

Chlorine eats away at ozone, but only if light is present and if the atmosphere is cold enough to create polar stratospheric clouds on which chlorine chemistry can occur — a relationship that Solomon was first to characterize in 1986.

In the field of planetary and atmospheric sensing, linear arrays capable of simultaneously measuring height - resolved spectral features would have a major impact on issues such as climate change and ozone chemistry,» explains Peter de Maagt, ESA's project manager for Star Tiger.

Two of the outdoor experiments on the HTV's first flight are a NASA ionospheric and thermospheric mapping device, and a JAXA system for monitoring the ozone layer's chemistry.

«Ozone and nitric oxide are both contributors to urban smog, so depending on how well a city is able to mitigate air pollution, ethanol may not be the «green fuel» that it is often called,» said Geiger, professor of chemistry in the Weinberg College of Arts and Sciences.

Berkemeier, T., S.S. Steimer, U. K. Krieger, T. Peter, U. Pöschl, M. Ammann, and M. Shiraiwa: Ozone uptake on glassy, semi-solid and liquid organic matter and the role of reactive oxygen intermediates in atmospheric aerosol chemistry, Physical Chemistry Chemical Physics 18 (18), 12662 - 12674, 2016.

The EPA report is concerned with the impacts that climate change can have on atmospheric chemistry, and in particular the summertime peaks in urban ground - level ozone which are a well - known and serious health hazard.

Much work is being done on improving the realism of such effects — particularly through ozone chemistry (which enhances the signal), and aerosol pathways (which don't appear to have much of a global effect i.e. Dunne et al. (2016)-RRB-.

Further field work by NASA during the 1987 Airborne Antarctic Ozone Experiment (AAOE) ended up providing definitive evidence in favor of the chlorine hypothesis, with details of the heterogeneous chemistry on polar stratospheric clouds as hypothesized by Susan Solomon and colleagues in 1986.

His closing slide cited the late Sherwood Rowland, the Nobel laureate in chemistry who faced years of industry criticism of his work on the link between chlorofluorocarbons and depletion of the Earth's protective sheath of ozone:

While participating in a November conference connected with the International Year of Chemistry, I spent time talking with Molina of the University of California, San Diego, a 1995 laureate in chemistry for his work (with others) on the atmospheric impact of ozone - destroying refrigerants and related chemicals.

There is also feedback to stratospheric ozone abundance owing to solid phase chemistry on the crystal surface.

An example of this kind of surprise happened in relation to the Antarctic ozone hole, where unexpected chemistry on surfaces of ice particles lead to much more efficient destruction of ozone in the polar vortex than had been expected, making an existing concern into a serious problem.

Here are a few of the problems that need to be worked out: There's the issue of the effect of the aerosols on stratospheric chemistry (think how unanticipated the chemistry of the Ozone Hole was), and the question of just where the aerosols would go once injected.

She has done research on ozone layer protection and nuclear chemistry, including environmental chemistry, specifically.

A number of leading scientists, for instance, Paul Crutzen, who had won a Nobel Prize for his work on atmospheric ozone chemistry, told Jim that he had put together just the sort of comprehensive and convincing presentation that was needed.

Users of chemistry - climate models (CCMs) with particular focus on long - term numerical simulations using CCMs for the detailed investigation of model feedbacks between ozone chemistry, ozone depleting substance (ODS) trends, and climate.

At the EGU General Assembly he led a session on the chemistry, climate and weather feedbacks in the Earth system in which he also presented the efforts at ECMWF to use interactive ozone in the IFS radiation scheme.

In 1995, shortly before F. Sherwood Rowland (1927 - March 10, 2012) was awarded the Nobel Prize in Chemistry for collaborative work two decades earlier on the fundamental chemistry of stratospheric ozone depletion, a House Science subcommittee held a hearing, chaired by Rep.... Continue reading →

Thus if the two mid latitude jets move equatorward at the same time as the ITCZ moves closer to the equator the combined effect on global albedo and the amount of solar energy able to penetrate the oceans will be substantial and would dwarf the other proposed effects on albedo from changes in cosmic ray intensity generating changes in cloud totals as per Svensmark and from suggested changes caused in upper cloud quantities by changes in atmospheric chemistry involving ozone which various other climate sceptics propose.

Every Commenter on this blog (supposed to be well versed in physics and chemistry) should be required to respond to Dr. Molina's (Nobel Prize on ozone depletion) basic question: http://theenergycollective.com/davidhone/60610/back-basics-climate-science

Chemically, there will be an increase in ozone depletion (due to increases in heterogenous surface chemistry in the stratosphere), increases in acid rain, possibly an increase in high cirrus cloud cover due to indirect effects of the sulphates on cloud lifetime.

Further, within my field, atmospheric chemistry, we are very much focused on the other forcings; aerosol and tropospheric ozone, for instance.

The chemistry - climate models used for the 2006 Ozone Assessment, predict that the Antarctic ozone hole will achieve full recovery in the second half of this century, and that this may have profound impacts on the surface winds and, likely, on other aspects of the Earth's climate, including surface temperatures, locations of storm tracks, extent of dry zones, amount of sea ice, and ocean circulaOzone Assessment, predict that the Antarctic ozone hole will achieve full recovery in the second half of this century, and that this may have profound impacts on the surface winds and, likely, on other aspects of the Earth's climate, including surface temperatures, locations of storm tracks, extent of dry zones, amount of sea ice, and ocean circulaozone hole will achieve full recovery in the second half of this century, and that this may have profound impacts on the surface winds and, likely, on other aspects of the Earth's climate, including surface temperatures, locations of storm tracks, extent of dry zones, amount of sea ice, and ocean circulation.

A good example is the consensus of chemistry models that projected a slow decline in stratospheric ozone levels in the 1980s, but did not predict the emergence of the Antarctic ozone hole because they all lacked the equations that describe the chemistry that occurs on the surface of ice crystals in cold polar vortex conditions — an «unknown unknown» of the time.

This is important for the light that it shines on tropospheric ozone chemistry («bad ozone») which is a contributing factor to global warming (albeit one which is about only about 20 % as important as CO2).

Chemically, there will be an increase in ozone depletion (due to increases in heterogeneous surface chemistry in the stratosphere), increases in acid rain, possibly an increase in high cirrus cloud cover due to indirect effects of the sulphates on cloud lifetime.

Topics that I work on or plan to work in the future include studies of: + missing aerosol species and sources, such as the primary oceanic aerosols and their importance on the remote marine atmosphere, the in - cloud and aerosol water aqueous formation of organic aerosols that can lead to brown carbon formation, the primary terrestrial biological particles, and the organic nitrogen + missing aerosol parameterizations, such as the effect of aerosol mixing on cloud condensation nuclei and aerosol absorption, the semi-volatility of primary organic aerosols, the importance of in - canopy processes on natural terrestrial aerosol and aerosol precursor sources, and the mineral dust iron solubility and bioavailability + the change of aerosol burden and its spatiotemporal distribution, especially with regard to its role and importance on gas - phase chemistry via photolysis rates changes and heterogeneous reactions in the atmosphere, as well as their effect on key gas - phase species like ozone + the physical and optical properties of aerosols, which affect aerosol transport, lifetime, and light scattering and absorption, with the latter being very sensitive to the vertical distribution of absorbing aerosols + aerosol - cloud interactions, which include cloud activation, the aerosol indirect effect and the impact of clouds on aerosol removal + changes on climate and feedbacks related with all these topics In order to understand the climate system as a whole, improve the aerosol representation in the GISS ModelE2 and contribute to future IPCC climate change assessments and CMIP activities, I am also interested in understanding the importance of natural and anthropogenic aerosol changes in the atmosphere on the terrestrial biosphere, the ocean and climate.