搜索结果: 1-15 共查到“大气科学 contributions”相关记录17条 . 查询时间(0.062 秒)
Pathways of PFOA to the Arctic: variabilities and contributions of oceanic currents and atmospheric transport and chemistry sources
PFOA the Arctic oceanic currents atmospheric transport chemistry sources
2010/10/21
Perfluorooctanoic acid (PFOA) and other perfluorinated compounds are industrial chemicals in use for decades which resist degradation in the environment and seem to accumulate in polar regions. Transp...
Quantifying the contributions to stratospheric ozone changes from ozone depleting substances and greenhouse gases
stratospheric ozone ozone depleting substances greenhouse gases
2010/9/21
A state-of-the-art chemistry climate model coupled to a three-dimensional ocean model is used to produce three experiments, all seamlessly covering the period 1950–2100, forced by different combinatio...
Molecular characterization of urban organic aerosol in tropical India: contributions of primary emissions and secondary photooxidation
Molecular characterization urban organic aerosol tropical India primary emissions secondary photooxidation
2010/8/12
Organic molecular composition of PM10 samples, collected at Chennai in tropical India, was studied using capillary gas chromatography/mass spectrometry. Fourteen organic compound classes were detected...
Contributions from DMS and ship emissions to CCN observed over the summertime North Pacific
DMS ship emissions CCN summertime North Pacific
2010/2/21
Measurements of cloud condensation nuclei (CCN) made over the North Pacific Ocean in July 2002 are analysed with concurrent measurements of aerosol number, mass and composition. Overall the CCN are co...
Contributions from transport, solid fuel burning and cooking to primary organic aerosols in two UK cities
solid fuel burning primary organic aerosols UK cities
2010/2/1
Organic matter frequently represents the single largest fraction of fine particulates in urban environments and yet the exact contributions from different sources and processes remain uncertain, owing...
Borehole climatology：a discussion based on contributions from climate modeling
Borehole climatology climate modeling
2009/12/3
Progress in understanding climate variability through the last millennium leans on simulation and reconstruction efforts. Exercises blending both approaches present a great potential for answering que...
Contributions of Accumulative Per Capita Emissions to Global Climate Change
contributions of accumulative per capita historical emissions climate change
2010/2/21
The Brazilian proposal for differentiated greenhouse gas emissions reduction targets for Annex I parties of the UNFCCC should be based on attribution of contribution to global climate change due to hi...
Evaluation of mobile emissions contributions to Mexico City's emissions inventory using on-road and cross-road emission measurements and ambient data
mobile emissions Mexico City's emissions inventory ambient data
2009/9/11
Mobile emissions represent a significant fraction of the total anthropogenic emissions burden in the Mexico City Metropolitan Area (MCMA) and, therefore, it is crucial to use top-down techniques infor...
Significant variations of trace gas composition and aerosol properties at Mt. Cimone during air mass transport from North Africa – contributions from wildfire emissions and mineral dust
trace gas composition North Africa wildfire emissions mineral dust
2009/7/22
High levels of trace gas (O3 and CO) and aerosol (BC, fine and coarse particle volumes), as well as high scattering coefficient (σp) values, were recorded at the regional GAW-WMO station of Mt. Cimone...
Primary and secondary contributions to aerosol light scattering and absorption in Mexico City during the MILAGRO 2006 campaign
aerosol light scattering Mexico City MILAGRO 2006 campaign
2009/6/16
A photoacoustic spectrometer, a nephelometer, an aethalometer, and an aerosol mass spectrometer were used to measure at ground level real-time aerosol light absorption, scattering, and chemistry at an...
Assessing positive matrix factorization model fit: a new method to estimate uncertainty and bias in factor contributions at the measurement time scale
Assessing positive matrix factorization model factor contributions measurement time scale
2009/3/12
A Positive Matrix Factorization receptor model for aerosol pollution source apportionment was fit to a synthetic dataset simulating one year of daily measurements of ambient PM2.5 concentrations, comp...
Technical Note: A diagnostic for ozone contributions of various NOx emissions in multi-decadal chemistry-climate model simulations
ozone contributions various NOx emissions multi-decadal chemistry-climate model
2009/2/26
Nitrogen oxide (NOx=NO+NO2) emissions from various sources contribute to the ozone budget. The identification of these contributions is important, e.g. for the assessment of emissions from traffic. Th...
Radiocarbon analysis in an Alpine ice core: record of anthropogenic and biogenic contributions to carbonaceous aerosols in the past（1650–1940）
Radiocarbon analysis Alpine ice core anthropogenic and biogenic contributions carbonaceous aerosols
2009/1/21
Long-term concentration records of carbonaceous particles (CP) are of increasing interest in climate research due to their not yet completely understood effects on climate. Nevertheless, only poor dat...
Modelling iodide – iodate speciation in atmospheric aerosol: Contributions of inorganic and organic iodine chemistry
iodate speciation atmospheric aerosol inorganic organic
2008/12/3
The speciation of iodine in atmospheric aerosol is currently poorly understood. Models predict negligible iodide concentrations but accumulation of iodate in aerosol, both of which is not confirmed by...
Contributions of pollutants from North China Plain to surface ozone at the Shangdianzi GAW Station
North China Plain surface ozone Shangdianzi GAW Station
2008/11/21
Regional ozone pollution has become one of the top environmental concerns in China, especially in those economically vibrant and densely populated regions, such as North China region including Beijing...