搜索结果: 1-15 共查到“大气物理学 heterogeneous”相关记录20条 . 查询时间(0.156 秒)
Evidence for heterogeneous chlorine activation in the tropical UTLS
heterogeneous chlorine the tropical UTLS
2011/1/19
Airborne in-situ observations of ClO in the tropics were made during the TROCCINOX (Aracatuba, Brazil, February 2005) and SCOUT-O3 (Darwin, Australia, November/December 2005) field campaigns. While du...
Heterogeneous ozonation kinetics of 4-phenoxyphenol in the presence of photosensitizer
Heterogeneous ozonation kinetics 4-phenoxyphenol photosensitizer
2010/2/21
At the mixing ratio of 60 ppb which corresponds to strongly polluted ozone areas, the first order of decay of 4-phenoxyphenol is k1=9.95×10−6 s−1. At a very high ozone mixing ratio of 6 pp...
Observations of heterogeneous reactions between Asian pollution and mineral dust over the Eastern North Pacific during INTEX-B
heterogeneous reactions Asian pollution mineral dust Eastern North Pacific INTEX-B
2009/11/19
In-situ airborne measurements of trace gases, aerosol size distributions, chemistry and optical properties were conducted over Mexico and the Eastern North Pacific during MILAGRO and INTEX-B. Heteroge...
Annual particle flux observations over a heterogeneous urban area
Annual particle flux observations heterogeneous urban area
2009/11/9
Long-term eddy covariance particle number flux measurements for the diameter range 6 nm to 5 μm were performed at the SMEAR III station over an urban area in Helsinki, Finland. The heterogeneity of th...
Comparative study of the effect of water on the heterogeneous reactions of carbonyl sulfide on the surface of α-Al2O3 and MgO
water heterogeneous reactions carbonyl sulfide MgO
2009/9/2
Here we compared the heterogeneous reactions of carbonyl sulfide (OCS) on the surface of α-Al2O3 and MgO and the effect of water on the reactions at 300 K using Knudsen cell–mass spectrometry, diffuse...
Parameterizing the competition between homogeneous and heterogeneous freezing in ice cloud formation – polydisperse ice nuclei
heterogeneous freezing ice cloud formation polydisperse ice nuclei
2009/8/25
This study presents a comprehensive ice cloud formation parameterization that computes the ice crystal number, size distribution, and maximum supersaturation from precursor aerosol and ice nuclei. The...
The heterogeneous reaction of hydroxyl radicals with sub-micron squalane particles: a model system for understanding the oxidative aging of ambient aerosols
heterogeneous reaction hydroxyl radicals sub-micron squalane particles ambient aerosols
2009/6/2
The heterogeneous reaction of OH radicals with sub-micron squalane particles, in the presence of O2, is used as a model system to explore the fundamental chemical mechanisms that control the oxidative...
Studies of heterogeneous freezing by three different desert dust samples
heterogeneous freezing desert dust samples
2009/5/6
We present results of experiments at the aerosol interactions and dynamics in the atmosphere (AIDA) chamber facility looking at the freezing of water by three different types of mineral particles at t...
Validation of an experimental setup to study atmospheric heterogeneous ozonolysis of semi-volatile organic compounds
atmospheric heterogeneous ozonolysis semi-volatile organic compounds
2009/3/31
There is currently a need for reliable experimental procedures to follow the heterogeneous processing simulating the atmospheric conditions. This work offers an alternative experimental device to stud...
Homogeneous vs. heterogeneous nucleation in water-dicarboxylic acid systems
Homogeneous heterogeneous nucleation water-dicarboxylic acid systems
2009/3/31
Binary heterogeneous nucleation of water-succinic/glutaric/malonic/adipic acid on nanometer-sized particles is investigated within the frame of classical heterogeneous nucleation theory. Homogeneous n...
Parameterizing the competition between homogeneous and heterogeneous freezing in cirrus cloud formation – monodisperse ice nuclei
homogeneous and heterogeneous freezing cirrus cloud formation monodisperse ice nuclei
2009/3/12
We present a parameterization of cirrus cloud formation that computes the ice crystal number and size distribution under the presence of homogeneous and heterogeneous freezing. The parameterization is...
Study of the heterogeneous reaction of O3 with CH3SCH3 using the wetted-wall flowtube technique
O3 CH3SCH3 wetted-wall flowtube technique
2009/3/11
This work presents the heterogeneous kinetics of the reaction of CH3SCH3 (dimethyl sulphide, DMS) with O3 (ozone) in aqueous solutions of different ionic strengths (0, 0.1 and 1.0M NaCl) using the wet...
Heterogeneous conversion of NO2 on secondary organic aerosol surfaces: A possible source of nitrous acid（HONO）in the atmosphere?
Heterogeneous conversion NO2 secondary organic aerosol nitrous acid HONO
2009/3/10
The heterogeneous conversion of NO2 on different secondary organic aerosols (SOA) was investigated with the focus on a possible formation of nitrous acid (HONO). In one set of experiments different or...
On the transition between heterogeneous and homogeneous freezing
transition heterogeneous homogeneous freezing
2009/3/10
Box model simulations of an uplifting and adiabatically cooling cloud of aerosol have been performed in order to study the transition between cirrus formation dominated by homogeneous nucleation of ic...
Oxalic acid as a heterogeneous ice nucleus in the upper troposphere and its indirect aerosol effect
Oxalic acid heterogeneous ice nucleus upper troposphere
2009/1/13
Heterogeneous ice freezing points of aqueous solutions containing various immersed solid dicarboxylic acids (oxalic, adipic, succinic, phthalic and fumaric) have been measured with a differential scan...