搜索结果: 1-15 共查到“理学 Trace gas”相关记录25条 . 查询时间(0.125 秒)
Scientists last autumn revealed that the gas phosphine was found in trace amounts in Venus’ upper atmosphere. That discovery promised the slim possibility that phosphine serves as a biological signatu...
Atmospheric inverse modeling with known physical bounds: an example from trace gas emissions
Atmospheric inverse modeling physical bounds
2014/12/18
Many inverse problems in the atmospheric sciences involve parameters with known physical constraintsExamples include nonnegativity (e.g., emissions of some urban air pollutants) or upward limits impli...
Meteorological and trace gas factors affecting the number concentration of atmospheric Aitken (Dp = 50 nm) particles in the continental boundary layer: parameterization using a multivariate mixed effects model
Meteorological number concentration atmospheric Aitken particles continental boundary layer multivariate mixed effects model
2014/12/9
Measurements of aerosol size distribution and different gas and meteorological parameters, made in three polluted sites in Central and Southern Europe: Po Valley, Italy, Melpitz and Hohenpeissenberg i...
PREP-CHEM-SRC – 1.0: a preprocessor of trace gas and aerosol emission fields for regional and global atmospheric chemistry models
The preprocessor. Launching Trace gases. Aerosol Atmospheric chemistry. Emissions Biomass burning
2014/12/9
The preprocessor PREP-CHEM-SRC presented in the paper is a comprehensive tool aiming at preparing emission fields of trace gases and aerosols for use in atmospheric-chemistry transport models. The con...
Assessment of fossil fuel carbon dioxide and other anthropogenic trace gas emissions from airborne measurements over Sacramento, California in spring 2009
fossil fuel carbon dioxide anthropogenic trace gas airborne measurements Sacramento California
2011/2/24
Direct quantification of fossil fuel CO2 (CO2ff) in atmospheric samples can be used to examine several carbon cycle and air quality questions. We collected in situ CO2, CO, and CH4 measurements and fl...
Laboratory measurements of trace gas emissions from biomass burning of fuel types from the southeastern and southwestern United States
Laboratory measurements trace gas fuel types the southeastern and southwestern United States
2010/11/30
Vegetation commonly managed by prescribed burning was collected from five southeastern and southwestern US military bases and burned under controlled conditions at the US Forest Service Fire Sciences ...
Trace gas and particle emissions from domestic and industrial biofuel use and garbage burning in central Mexico
Trace gas garbage burning central Mexico
2010/2/1
In central Mexico during the spring of 2007 we measured the initial emissions of 12 gases and the aerosol speciation for elemental and organic carbon (EC, OC), anhydrosugars, Cl−, NO3−, an...
From biota to chemistry and climate: towards a comprehensive description of trace gas exchange between the biosphere and atmosphere
From biota to chemistry and climate trace gas exchange the biosphere and atmosphere
2010/1/21
Exchange of non-CO2 trace gases between the land surface and the atmosphere plays an important role in atmospheric chemistry and climate. Recent studies have highlighted its importance for interpretat...
A two-step scheme for high-resolution regional atmospheric trace gas inversions based on independent models
high-resolution regional atmospheric trace gas independent models
2009/8/7
Mixing ratio measurements of atmospheric tracers like CO2 can be used to estimate regional surface-air tracer fluxes using inverse methods, involving a numerical transport model. Currently available t...
East Asian SO2 pollution plume over Europe – Part 1: Airborne trace gas measurements and source identification by particle dispersion model simulations
East Asian SO2 pollution Europe Airborne trace gas measurements source identification
2009/7/23
A large SO2-rich pollution plume of East Asian origin was detected by aircraft based CIMS (Chemical Ionization Mass Spectrometry) measurements at 3–7.5 km altitude over the North Atlantic. The measure...
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...
Methodology and calibration for continuous measurements of biogeochemical trace gas and O2 concentrations from a 300-m tall tower in central Siberia
Methodology calibration continuous measurements biogeochemical trace gas O2 concentrations
2010/2/8
We present an integrated system for measuring atmospheric concentrations of CO2, O2, CH4, CO, and N2O in central Siberia. Our project aims to demonstrate the feasibility of establishing long-term, con...
Simulation of trace gas redistribution by convective clouds - Liquid phase processes
Simulation of trace gas convective clouds - Liquid phase processes
2009/3/12
A two-dimensional dynamic cloud model with detailed microphysics and a spectral treatment of gas scavenging was used to simulate trace gas vertical redistribution in precipitating continental and mar...
Köhler theory for a polydisperse droplet population in the presence of a soluble trace gas, and an application to stratospheric STS droplet growth
Kö hler theory polydisperse droplet population soluble trace gas stratospheric STS droplet
2009/3/11
We consider the equilibrium behavior of a polydisperse aqueous droplet population as a function of relative humidity (RH) when a soluble trace gas, such as nitric acid, is present in the system. The d...
Trace gas measurements from infrared satellite for chemistry and climate applications
Trace gas infrared satellite chemistry and climate applications
2009/3/11
Space-borne thermal infrared instruments working in the nadir geometry are providing spectroscopic measurements of species that impact on the chemical composition of the atmosphere and on the climate ...