搜索结果: 1-15 共查到“大气物理学 trends”相关记录24条 . 查询时间(0.031 秒)
Primary anthropogenic aerosol emission trends for China, 1990–2005
anthropogenic primary aerosol China a dynamic methodology
2011/2/25
An inventory of anthropogenic primary aerosol emissions in China was developed for 1990–2005 using a technology-based approach. Taking into account changes in the technology penetration within industr...
An analysis of long-term regional-scale ozone simulations over the Northeastern United States: variability and trends
long-term regional-scale ozone the Northeastern United States variability and trends
2011/2/24
This study presents the results from two sets of 18-year air quality simulations over the Northeastern US performed with a regional photochemical modeling system. These two simulations utilize differe...
Long-term trends of black carbon and sulphate aerosol in the Arctic: changes in atmospheric transport and source region emissions
black carbon sulphate aerosol the Arctic atmospheric transport source region emissions
2010/10/11
To reveal the contribution of different source regions on these trends, we used a cluster analysis of the output of the Lagrangian particle dispersion model FLEXPART run backward in time from the meas...
Baseline levels and trends of ground level ozone in Canada and the United States
Baseline levels and trends ground level ozone Canada the United States
2010/9/21
A statistical method was developed to extract baseline levels of ground level ozone in Canada and the US, and to quantify the temporal changes of baseline ozone levels on annual, seasonal, diurnal and...
Temperature variability and trends in the UT-LS over a subtropical site: Reunion (20.8° S, 55.5° E)
Temperature variability and trends the UT-LS a subtropical site Reunion (20.8° S, 55.5° E)
2010/9/21
This paper mainly focuses on the trends and variability of the UT-LS temperature using radiosonde observations carried out over 16 years (January 1993 to December 2008) from a southern subtropical sit...
Trends in long-term gaseous mercury observations in the Arctic and effects of temperature and other atmospheric conditions
long-term gaseous mercury observations the Arctic temperature and other atmospheric conditions
2010/8/13
Gaseous elemental mercury (GEM) measurements at Alert, Canada, from 1995 to 2007 were analyzed for statistical time trends and for correlations with meteorological and climate data. A significant decr...
Radiosonde stratospheric temperatures at Dumont d'Urville (Antarctica): trends and link with polar stratospheric clouds
Radiosonde stratospheric temperatures Dumont d'Urville (Antarctica) polar stratospheric clouds
2010/8/12
Temperature profiles measurements are performed daily (00:00 UT) in Dumont d'Urville (66°40' S, 140°01' E) by Météo-France, using standard radiosondes, since the International Geophysical Year in 1957...
On the seasonal dependence of tropical lower-stratospheric temperature trends
the seasonal dependence tropical lower-stratospheric temperature trends
2010/8/12
This study examines the seasonality of tropical lower-stratospheric temperature trends using the Microwave Sounding Unit lower-stratospheric channel (T4) for 1980–2008. We present evidence that this s...
Technical Note: Harmonized retrieval of column-integrated atmospheric water vapor from the FTIR network – first examples for long-term records and station trends
Harmonized retrieval column-integrated atmospheric water vapor FTIR network
2009/12/3
We present a method for harmonized retrieval of integrated water vapor (IWV) from existing, long-term, measurement records at the ground-based mid-infrared solar FTIR spectrometry stations of the Netw...
Impact of prescribed SSTs on climatologies and long-term trends in CCM simulations
prescribed SSTs climatologies long-term trends CCM simulations
2009/8/25
Chemistry-Climate Model (CCM) simulations are commonly used to project the past and future development of the dynamics and chemistry of the stratosphere, and in particular the ozone layer. So far, CCM...
Recent trends in atmospheric methyl bromide: analysis of post-Montreal Protocol variability
atmospheric methyl bromide post-Montreal Protocol variability
2009/8/25
The atmospheric methyl bromide (CH3Br) burden has declined in recent years, in response to the phaseout of agricultural and structural fumigation consumption under the amendments to the Montreal Proto...
Surface ozone at the Caucasian site Kislovodsk High Mountain Station and the Swiss Alpine site Jungfraujoch: data analysis and trends（1990–2006）
Surface ozone Caucasian site Kislovodsk High Mountain Station the Swiss Alpine site Jungfraujoch
2009/6/23
Long-term ozone measurements of two background mountain sites, namely the Kislovodsk High Mountain Station in Caucasus, Russia (KHMS, 43.70° N, 42.70° E, 2070 m a.s.l.) and the Jungfraujoch in Switzer...
Modelling trends in OH radical concentrations using generalized additive models
Modelling trends OH radical concentrations generalized additive models
2009/3/31
During the TORCH campaign a zero dimensional box model based on the Master Chemical Mechanism was used to model concentrations of OH radicals. The model provided a close overall fit to measured concen...
The oxidation efficiency of the troposphere is largely determined by the hydroxyl radical and its global distribution. Its presence limits the lifetime of most trace gases. Because of the great import...
Trends and inter-annual variability of methane emissions derived from 1979-1993 global CTM simulations
Trends and inter-annual variability methane emissions global CTM simulations
2009/3/10
The trend and interannual variability of methane sources are derived from multi-annual simulations of tropospheric photochemistry using a 3-D global chemistry-transport model. Our semi-inverse analysi...