搜索结果: 1-15 共查到“大气科学 uncertainties”相关记录22条 . 查询时间(0.078 秒)
Uncertainties in tree-ring-based climate reconstructions probed
Uncertainties tree-ring-based climate reconstructions
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2016/2/22
Current approaches to reconstructing past climate by using tree-ring data need to be improved on so that they can better take uncertainty into account, new University of Otago-led suggests.Tree growth...
Sensitivity of stratospheric Bry to uncertainties in very short lived substance emissions and atmospheric transport
stratospheric Bry lived substance emissions atmospheric transport
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2011/2/25
We evaluate the sensitivity of Bry entering the stratosphere with a simplified model that allows calculations over a wide parameter range for parameters that are currently poorly quantified. The model...
Impact of parametric uncertainties on the present-day climate and on the anthropogenic aerosol effect
parametric uncertainties the present-day climate the anthropogenic aerosol effect
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2010/12/20
Clouds constitute a large uncertainty in global climate modeling and climate change projections as many clouds are smaller than the size of a model grid box. Some processes, such as the rates of rain ...
The importance of transport model uncertainties for the estimation of CO2 sources and sinks using satellite measurements
transport model uncertainties CO2 sources and sinks satellite measurements
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2010/11/3
This study presents a synthetic model intercomparison to investigate the importance of transport model errors for estimating the sources and sinks of CO2 using satellite measurements. The experiments ...
Ozone predictabilities due to meteorological uncertainties in the Mexico City basin using ensemble forecasts
Ozone predictabilities meteorological uncertainties the Mexico City basin ensemble forecasts
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2010/8/16
The purpose of the present study is to investigate the sensitivity of ozone (O3) predictions in the Mexico City Metropolitan Area (MCMA) to meteorological initial uncertainties and planetary boundary ...
Uncertainties in wind speed dependent CO2 transfer velocities due to airflow distortion at anemometer sites on ships
wind speed dependent CO2 velocities airflow distortion anemometer sites ships
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2010/8/13
Data from platforms, research vessels and merchant ships are used to estimate ocean CO2 uptake via parameterisations of the gas transfer velocity (k) and measurements of the difference between the par...
Uncertainties in estimating mercury emissions from coal-fired power plants in China
mercury emissions coal-fired power plants China
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2010/8/12
A detailed multiple-year inventory of mercury emissions from anthropogenic activities in China has been developed. Coal combustion and nonferrous metals production continue to be the two leading mercu...
Sources of uncertainties in modelling black carbon at the global scale
black carbon the global scale
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2010/8/12
Our understanding of the global black carbon (BC) cycle is essentially qualitative due to uncertainties in our knowledge of its properties. This work investigates two source of uncertainties in modell...
Uncertainties in atmospheric chemistry modelling due to convection parameterisations and subsequent scavenging
atmospheric chemistry modelling parameterisations subsequent scavenging
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2010/2/21
Moist convection in global modelling contributes significantly to the transport of energy, momentum, water and trace gases and aerosols within the troposphere. Since convective clouds are on a scale t...
Estimating trajectory uncertainties due to flow dependent errors in the atmospheric analysis
Estimating trajectory uncertainties flow dependent errors atmospheric analysis
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2009/12/3
The uncertainty of a calculated trajectory is dependent on the uncertainty in the atmospheric analysis. Using the Ensemble Transform method (originally adapted for ensemble forecasting) we sample the ...
Uncertainties in modelling CH4 emissions from northern wetlands in glacial climates：effect of hydrological model and CH4 model structure
northern wetlands glacial climates hydrological model CH4 model structure
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2009/12/3
Methane (CH4) fluxes from northern wetlands may have influenced atmospheric CH4 concentrations at climate warming phases during the last 800 000 years and during the present global warming. Including ...
Sensitivity of polar stratospheric ozone loss to uncertainties in chemical reaction kinetics
polar stratospheric ozone uncertainties chemical reaction kinetics
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2009/11/19
The impact and significance of uncertainties in model calculations of stratospheric ozone loss resulting from known uncertainty in chemical kinetics parameters is evaluated in trajectory chemistry sim...
Process based inventory of isoprenoid emissions from European forests: model comparisons, current knowledge and uncertainties
isoprenoid emissions European forests model comparisons
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2009/6/22
Large uncertainties exist in our knowledge of regional emissions of non-methane biogenic volatile organic compounds (BVOC). We address these uncertainties through a two-pronged approach by compiling a...
Uncertainties and assessments of chemistry-climate models of the stratosphere
chemistry-climate models stratosphere
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2009/3/10
In recent years a number of chemistry-climate models have been developed with an emphasis on the stratosphere. Such models cover a wide range of time scales of integration and vary considerably in co...
A global off-line model of size-resolved aerosol microphysics: II. Identification of key uncertainties
global off-line model size-resolved aerosol microphysics key uncertainties
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2009/2/19
We use the new GLOMAP model of global aerosol microphysics to investigate the sensitivity of modelled sulfate and sea salt aerosol properties to uncertainties in the driving microphysical processes an...