搜索结果: 1-15 共查到“大气科学 ensemble”相关记录20条 . 查询时间(0.062 秒)
Sensitivity tests for an ensemble Kalman filter for aerosol assimilation
an ensemble Kalman filter aerosol assimilation
2010/8/16
We present sensitivity tests for a global aerosol assimilation system utilizing AERONET observations of AOT (aerosol optical thickness) and AAE (aerosol Ångström exponent). The assimilation...
Ozone predictabilities due to meteorological uncertainties in the Mexico City basin using ensemble forecasts
Ozone predictabilities meteorological uncertainties the Mexico City basin ensemble forecasts
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 ...
Comparison of OMI NO2 tropospheric columns with an ensemble of global and European regional air quality models
OMI NO2 tropospheric global and European regional air quality models
2010/8/12
We present a comparison of tropospheric NO2 from OMI measurements to the median of an ensemble of Regional Air Quality (RAQ) models, and an intercomparison of the contributing RAQ models and two globa...
Sensitivity of ensemble Lagrangian reconstructions to assimilated wind time step resolution
ensemble Lagrangian reconstructions wind time step resolution
2010/8/12
We study the impact of temporal and spatial resolution and changes in modelled meteorological winds in the context of diffusive ensemble Lagrangian reconstructions. In situ tracer measurements are mod...
Applying an ensemble Kalman filter to the assimilation of AERONET observations in a global aerosol transport model
Kalman filter assimilation AERONET observations global aerosol transport model
2010/3/16
We present a global aerosol assimilation system based on an Ensemble Kalman filter, which we believe leads to a significant improvement in aerosol fields. The ensemble allows realistic, spatially and ...
Northern winter stratospheric temperature and ozone responses to ENSO inferred from an ensemble of Chemistry Climate Models
Northern winter stratospheric temperature ozone responses Chemistry Climate Models
2009/12/3
The connection between the El Niño Southern Oscillation (ENSO) and the Northern polar stratosphere has been established from observations and atmospheric modeling. Here a systematic inter-compa...
Skill prediction of local weather forecasts based on the ECMWF ensemble
Skill prediction local weather forecasts ECMWF ensemble
2009/11/12
Ensemble Prediction has become an essential part of numerical weather forecasting. In this paper we investigate the ability of ensemble forecasts to provide an a priori estimate of the expected foreca...
Verification of intense precipitation forecasts from single models and ensemble prediction systems
intense precipitation forecasts single models ensemble prediction systems
2009/11/12
The performance of single models and ensemble prediction systems has been investigated with respect to quantitative precipitation forecasts. Evaluation is based on the potential economic value of + 72...
Performance of the ARPA-SMR limited-area ensemble prediction system:two flood cases
ARPA-SMR limited-area ensemble prediction system flood cases
2009/11/12
The performance of the ARPA-SMR Limited-area Ensemble Prediction System (LEPS), generated by nesting a limited-area model on selected members of the ECMWF targeted ensemble, is evaluated for two flood...
Can an ensemble give anything more than Gaussian probabilities?
ensemble anything more Gaussian probabilities
2009/11/12
Can a relatively small numerical weather prediction ensemble produce any more forecast information than can be reproduced by a Gaussian probability density function (PDF)? This question is examined us...
Increasing the horizontal resolution of ensemble forecasts at CMC
horizontal resolution ensemble forecasts CMC
2009/11/12
Ensemble forecasts are run operationally since February 1998 at the Canadian Meteorological Centre, with outputs up to ten days. The ensemble size was increased from eight to sixteen members in August...
The COSMO-LEPS mesoscale ensemble system:validation of the methodology and verification
COSMO-LEPS mesoscale ensemble system validation methodology verification
2009/11/9
The limited-area ensemble prediction system COSMO-LEPS has been running every day at ECMWF since November 2002. A number of runs of the non-hydrostatic limited-area model Lokal Modell (LM) are availab...
Parameter estimation in an atmospheric GCM using the Ensemble Kalman Filter
Parameter estimation atmospheric GCM Ensemble Kalman Filter
2009/11/9
We demonstrate the application of an efficient multivariate probabilistic parameter estimation method to a spectral primitive equation atmospheric GCM. The method, which is based on the Ensemble Kalma...
Estimating surface CO2 fluxes from space-borne CO2 dry air mole fraction observations using an ensemble Kalman Filter
surface CO2 fluxes space-borne CO2 ensemble Kalman Filter
2009/5/6
We have developed an ensemble Kalman Filter (EnKF) to estimate 8-day regional surface fluxes of CO2 from space-borne CO2 dry-air mole fraction observations (XCO2) and evaluate the approach using a ser...
Modelling tracer transport by a cumulus ensemble: lateral boundary conditions and large-scale ascent
Modelling tracer transport by a cumulus ensemble: lateral boundary conditions and large-scale ascent
2009/3/5
The vertical transport of tracers by a cumulus ensemble at the TOGA-COARE site is modelled during a 7 day episode using 2-D and 3-D cloud-resolving setups of the Weather Research and Forecast (WRF) mo...