搜索结果: 1-13 共查到“大气化学 trends”相关记录13条 . 查询时间(0.141 秒)
Attribution of stratospheric ozone trends to chemistry and transport: a modelling study
stratospheric ozone chemistry transport a modelling study
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2010/12/28
The decrease of the concentration of ozone depleting substances (ODSs) in the stratosphere over the past decade raises the question to what extent observed changes in stratospheric ozone over this per...
Sulfur dioxide emissions in China and sulfur trends in East Asia since 2000
Sulfur dioxide China sulfur trends East Asia
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2010/8/16
With the rapid development of the economy, the sulfur dioxide (SO2) emission from China since 2000 is of increasing concern. In this study, we estimate the annual SO2 emission in China after 2000 usin...
Decadal trends in aerosol chemical composition at Barrow, Alaska: 1976–2008
Decadal trends aerosol chemical composition Barrow Alaska
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2009/12/3
Aerosol measurements at Barrow, Alaska during the past 30 years have identified the long range transport of pollution associated with Arctic Haze as well as ocean-derived aerosols of more local origin...
Long-lived halocarbon trends and budgets from atmospheric chemistry modelling constrained with measurements in polar firn
Long-lived halocarbon atmospheric chemistry modelling polar firn
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2009/6/22
The budgets of seven halogenated gases (CFC-11, CFC-12, CFC-113, CFC-114, CFC-115, CCl4 and SF6) are studied by comparing measurements in polar firn air from two Arctic and three Antarctic sites, and ...
Variability and trends in stratospheric NO2 in Antarctic summer, and implications for stratospheric NOy
stratospheric NO2 Antarctic summer stratospheric NOy
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2009/6/16
NO2 measurements during 1990–2007, obtained from a zenith-sky spectrometer in the Antarctic, are analysed to determine the long-term changes in NO2. An atmospheric photochemical box model and a radiat...
The contribution of anthropogenic bromine emissions to past stratospheric ozone trends: a modelling study
anthropogenic bromine emissions stratospheric ozone trends modelling study
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2009/5/6
Bromine compounds play an important role in the depletion of stratospheric ozone. We have calculated the changes in stratospheric ozone in response to changes in the halogen loading over the past deca...
Simulation of stratospheric water vapor trends: impact on stratospheric ozone chemistry
stratospheric water vapor trends stratospheric ozone chemistry
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2009/2/9
A transient model simulation of the 40-year time period 1960 to 1999 with the coupled climate-chemistry model (CCM) ECHAM4.L39(DLR)/CHEM shows a stratospheric water vapor increase over the last two d...
Observations of the diurnal and seasonal trends in nitrogen oxides in the western Sierra Nevada
diurnal and seasonal trends nitrogen oxides western Sierra Nevada
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2009/1/20
Observations of speciated nitrogen oxides, namely NO2, total peroxy nitrates (ΣPNs), total alkyl nitrates (ΣANs), and HNO3 by thermal dissociation laser induced fluorescence (TD-LIF), and supporting c...
The influence of polar vortex ozone depletion on NH mid-latitude ozone trends in spring
polar vortex ozone depletion NH mid-latitude ozone spring
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2009/1/13
Reverse domain-filling trajectory calculations have been performed for the years 1993, 1995, 1996, 1997, and 2000 to calculate the spreading of ozone depleted air from the polar vortex to midlatitudes...
Aerosol light absorption in the North Atlantic: trends and seasonal characteristics during the period 1989 to 2003
Aerosol light absorption the North Atlantic trends and seasonal characteristics
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2009/1/8
Aerosol light attenuation on quartz fibre filters has been measured since February 1989 at the Mace Head Atmospheric Research station near Carna, Co. Galway, Ireland, using an Aethalometer. The freque...
Trends and variability in stratospheric mixing: 1979–2005
stratospheric mixing transport of ozone tropical source regions
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2008/12/24
Changes in climate are likely to drive changes in stratospheric mixing with associated implications for changes in transport of ozone from tropical source regions to higher latitudes, transport of wat...
Trends and variability of midlatitude stratospheric water vapour deduced from the re-evaluated Boulder balloon series and HALOE
midlatitude stratospheric water vapour re-evaluated Boulder balloon series HALOE
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2008/10/31
This paper presents an updated trend analysis of water vapour in the lower midlatitude stratosphere from the Boulder balloon-borne NOAA frostpoint hygrometer measurements and from the Halogen Occulati...
Analysis of global water vapour trends from satellite measurements in the visible spectral range
global water vapour trends satellite measurement visible spectral range
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2008/10/28
Global water vapour total column amounts have been retrieved from spectral data provided by the Global Ozone Monitoring Experiment (GOME) flying on ERS-2, which was launched in April 1995, and the SCa...