This paper studies the effect of targeted observations on state and parameter estimates determined with Kalman filter data assimilation (DA) techniques. We first provide an analytical result demonstrating that targeting observations within the Kalman filter for a linear model can significantly reduce state estimation error as opposed to fixed or randomly located observations. We next conduct ob...

Data assimilation of dust aerosol observations for CUACE/Dust forecasting system T. Niu, S. L. Gong, G. F. Zhu, H. L. Liu, X. Q. Hu, C. H. Zhou, and Y. Q. Wang Center for Atmosphere Watch & Services (CAWAS), Chinese Academy of Meteorological Sciences, China Meteorological Administration (CMA), Beijing 100081, China Air Quality Research Division, Science & Technology Branch, Environment Canada, ...

This contribution deals with the discrimination between stratiform and convective cells in meteorological radar images. This study is based on a textural analysis of the latter and their classification using a Support Vector Machine (SVM). First, we applied different textural parameters such as energy, entropy, inertia and local homogeneity. Through this experience, we identified the different ...

Spatialization can be used in sonification as an additional mapping dimension. Immersive spatialization also transmits more auditory data to a subject, compared to monophonic or stereophonic presentation. In this study the VBAP spatialization method is applied to the sonification of meteorological data gathered from a large geographical area in two different listening conditions. Parameter-driv...

An empirical study was made of the relationship of precipitation occurrence t o linearly interpolated concurrent vertical motion, 500-mb. initial 1-orticity, vorticity advection, and the average of the 700-mb. and 500-mb. dew point depressions a t Salt Lake City, Utah. All parameters except dew point depressions were obtained from the facsimile charts transmitted by the National Meteorological ...

Looking through the history, people have always been associating suicide with weather conditions, trying to understand and identify the relationship between meteorological factors and suicide. The aim of this study was to determine and analyze the meteorological conditions in the time of attempted or committed suicides, and examine the possible link between the changes of meteorological factors...

(G) and observed discharge (Q), whereas the other data-driven model, ANN-Ensemble (ANN-E), and the two conceptual models, HBV and GR4J, use forecasted meteorological inputs (P and PET), whereby we employ ensemble seasonal meteorological forecasts. We compared low flow forecasts without any meteorological forecasts as input (ANN-I) and five different cases of seasonal meteorological forcing: (1)...

1 Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites (KLRCV), National Satellite Meteorological Center, China Meteorological Administration (NSMC/CMA), Beijing 100081, China 2 Centre for Atmosphere Watch & Services (CAWAS), Chinese Academy of Meteorological Sciences, China Meteorological Administration (CMA), Beijing 100081, China 3 Institute of remote sensing...

The recent eruptions of the Icelandic Eyjafjallajokull and Grímsvötn volcanoes occurred in 2010 and 2011 respectively have been highlighted the necessity to increase the accuracy of the ash detection and retrieval. Follow the evolution of the ash plume is crucial for aviation security. Indeed from the accuracy of the algorithms applied to identify the ash presence may depend the safety of the p...