An objective method to associate local weather extremes with characteristic circulation structures

In this paper we give methods to find characteristic circulation patterns which are connected to local extreme temperature anomalies. Two data reduction techniques are applied: Legendre polynomial fitting and watershedding. For polynomial fitting a clear trend is found with respect to local temperatures. However, the trend is not distinctive enough to give clear answers on the type of circulation patterns belonging to local extremes. The main advantage of watershedding is that the physical properties of the circulation patterns are retained while the dimension of the data is largely reduced. Expert knowledge, however, is needed to model these main features as predictors

RESEARCH PRODUCTIVITY AND SELECTED CHARACTERISTICS OF AGRICULTURAL ECONOMICS RESEARCH AND TEACHING FACULTY IN THE SOUTHERN REGION

Teaching/Communication/Extension/Profession,

GRANGER CAUSALITY AND U.S. CROP AND LIVESTOCK PRICES

Agricultural economists have recently been attracted to procedures suggested by Granger and others which allow observed data to reveal causal relationships. Results of this study indicate that "causality" tests can be ambiguous in identifying behavioral relationships between agricultural price variables. Caution is suggested when using such procedures for model choice.Demand and Price Analysis,

First results of the OROMA experiment in the Lister Tief of the German Bight in the North Sea, EARSeL Proceedings

The objective of the project entitled “Operational Radar and Optical Mapping in monitoring hydrodynamic, morphodynamic and environmental parameters for coastal management (OROMA)” within the Fifth Framework Programme of the European Commission (EC) is to improve the effectiveness of monitoring technologies in coastal waters. The Research Vessel (R.V.) Ludwig Prandtl of the GKSS research centre was equipped with special sensors and instruments to measure the position of the ship, the water depth, the salinity, the water temperature, the current speed and direction, the modulation characteristics of short-wave energies, and relevant air-sea interaction parameters due to the presence of submarine sand waves. The first experiment of the OROMA project on 5-16 August 2002 took place in the Lister Tief, a tidal inlet of the German Bight in the North Sea. The seabed morphology of the Lister Tief reveals a complex configuration of different bedforms which is four-dimensional in space and time. A significant upward orientated component uvert of the three-dimensional current velocity field was observed. Marked vertically so-called waterspouts of uvert above the crests of sand waves have been measured by the Acoustic Doppler Current Profiler (ADCP) as straight lines. They cause water upwelling with turbulence patterns at the water surface affecting the Normalized Radar Cross Section (NRCS) modulation. A first impression of expected NRCS modulation signatures of sea bottom topography detected by the GKSS shipborne X-band radar are presented as an uncalibrated composite of five single sea clutter images acquired in the Lister Tief on 22 November 1990

POPULATION-SPECIFIC RECREATION DEMAND MODELS AND THE CONSEQUENCES OF POOLING SAMPLE DATA

This paper considers the implications of different geographical population definitions in analysis of demand for wildlife recreation. Demand functions for fishing, small game hunting, big game hunting, and wildlife enjoyment are estimated for individual Southeastern states and also for a pooled sample of all the states. Statistically significant differences between the state and regional estimates of the variable cost coefficient exist in 18 of the 40 cases. Consumer surplus values derived from state cost coefficients can differ greatly from values derived from pooled coefficients.Resource /Energy Economics and Policy,

ASSESSMENT OF JOURNALS USED BY AGRICULTURAL ECONOMISTS AT LAND-GRANT UNIVERSITIES

Agricultural economists at land-grant universities were surveyed to evaluate the use and assessment of professional journals. Faculty rankings of journals are reported along with faculty perceptions of changes in the quality of selected journals. Of 25 journals used by agricultural economics faculties, the Southern Journal of Agricultural Economics ranked first among regional agricultural economics journals in personal usefulness, subscriptions held, papers submitted, papers published, and participation in the editorial and review processes. The SJAE was also ranked as the second most improved journal among all journals evaluated.Teaching/Communication/Extension/Profession,