搜索结果: 1-15 共查到“大气科学 NOx”相关记录61条 . 查询时间(0.06 秒)
AR：NOx大幅减排有效缓解北京臭氧污染（图）
NOx 大幅减排 北京 臭氧污染
2020/11/13
2013年“国十条”实施以来，全国颗粒物浓度大幅下降，臭氧浓度显著升高。类似于“打地鼠”的污染现象，成因仍不清晰，采取哪种防治政策也无从下手。
利用1992年9月～2005年8月的HALOE资料,对我国低纬高原地区上空平流层中NOx,O3等大气痕量气体的混合比垂直变化进行了研究,并对本区域不同高度上NOx混合比与全球同纬度进行了比较,同时对NOx随时间的演变特征,NOx的变化周期及NOx与O3的相关关系进行了分析.结果表明:①NOx,O3混合比先随高度增加,到极值时又逐渐减小;在极值高度上,各个季节NOx,O3的混合比值都是夏季最高,冬季...
Global modeling of organic aerosol: the importance of reactive nitrogen (NOx and NO3)
organic aerosol reactive nitrogen (NOx and NO3)
2010/12/20
Reactive nitrogen compounds, specifically NOx and NO3, likely influence global organic aerosol levels. To assess these interactions, GEOS-Chem, a chemical transport model, is updated to include improv...
Direct satellite observation of lightning-produced NOx
Direct satellite observation lightning-produced NOx
2010/11/30
In this study we present a systematic analysis of NO2 column densities from SCIAMACHY measurements over active thunderstorms, as detected by the World-Wide Lightning Location Network (WWLLN), where th...
NOx and O3 above a tropical rainforest: an analysis with a global and box model
a tropical rainforest a global and box model NOx O3
2010/11/30
A cross-platform field campaign, OP3, was conducted in the state of Sabah in Malaysian Borneo between April and July of 2008. Among the suite of observations recorded, the campaign included measuremen...
Coupling of HOx, NOx and halogen chemistry in the antarctic boundary layer
HOx, NOx and halogen chemistry the antarctic boundary layer
2010/11/3
A modelling study of radical chemistry in the coastal Antarctic boundary layer, based upon observations performed in the course of the CHABLIS (Chemistry of the Antarctic Boundary Layer and the Interf...
HOx observations over West Africa during AMMA: impact of isoprene and NOx
HOx observations West Africa AMMA isoprene NOx
2010/10/11
Aircraft OH and HO2 measurements made over West Africa during the AMMA field campaign in summer 2006 have been investigated using a box model constrained to observations of long-lived species and phys...
Multi-annual changes of NOx emissions in megacity regions: nonlinear trend analysis of satellite measurement based estimates
NOx emissions megacity regions nonlinear trend analysis satellite measurement
2010/9/21
Hazardous impact of air pollutant emissions from megacities on atmospheric composition on regional and global scales is currently an important issue in atmospheric research. However, the quantificatio...
Role of aldehyde chemistry and NOx concentrations in secondary organic aerosol formation
aldehyde chemistry NOx concentrations secondary organic aerosol formation
2010/8/16
Aldehydes are an important class of products from atmospheric oxidation of hydrocarbons. Isoprene (2-methyl-1,3-butadiene), the most abundantly emitted atmospheric non-methane hydrocarbon, produces a ...
Modeling the regional impact of ship emissions on NOx and ozone levels over the Eastern Atlantic and Western Europe using ship plume parameterization
ship emissions NOx ozone levels the Eastern Atlantic Western Europe ship plume parameterization
2010/8/16
In general, regional and global chemistry transport models apply instantaneous mixing of emissions into the model's finest resolved scale. In case of a concentrated source, this could result in errone...
Impact of West African Monsoon convective transport and lightning NOx production upon the upper tropospheric composition: a multi-model study
West African Monsoon NOx production the upper tropospheric composition a multi-model study
2010/8/13
Within the African Monsoon Multidisciplinary Analysis (AMMA), we investigate the impact of nitrogen oxides produced by lightning (LiNOx) and convective transport during the West African Monsoon (WAM) ...
In situ measurements of molecular iodine in the marine boundary layer: the link to macroalgae and the implications for O3, IO, OIO and NOx
molecular iodine the marine boundary layer macroalgae the implications for O3, IO, OIO and NOx
2010/8/13
Discrete in situ atmospheric measurements of molecular iodine (I2) were carried out at Mace Head and Mweenish Bay on the west coast of Ireland using diffusion denuders in combination with a gas chroma...
Particle number, particle mass and NOx emission factors at a highway and an urban street in Copenhagen
Particle number particle mass NOx emission factors an urban street Copenhagen
2010/8/12
This paper presents measurements of traffic-generated gas and particle pollution at two sites, one near a major highway and one near a busy urban street in Copenhagen, Denmark. Both sites were equippe...
Peroxyacetic acid in urban and rural atmosphere: concentration, feedback on PAN-NOx cycle and implication on radical chemistry
Peroxyacetic acid rural atmosphere PAN-NOx cycle radical chemistry
2010/2/1
Peroxyacetic acid (PAA) is one of the most important atmospheric organic peroxides, which have received increasing attention for their potential contribution to the oxidation capacity of the troposphe...
Lightning NOx emissions over the USA constrained by TES ozone observations and the GEOS-Chem model
Lightning NOx TES ozone observations GEOS-Chem model
2010/1/18
Improved estimates of NOx from lightning sources are required to understand tropospheric NOx and ozone distributions, the oxidising capacity of the troposphere and corresponding feedbacks between chem...