Scalar-Flux Similarity in the Layer Near the Surface Over Mountainous Terrain

The scaled standard deviations of temperature and humidity are investigated in complex terrain. The study area is a steep Alpine valley, with six measurement sites of different slope, orientation and roughness (i-Box experimental site, Inn Valley, Austria). Examined here are several assumptions forming the basis of Monin–Obukhov similarity theory (MOST), including constant turbulence fluxes with height and the degree of self-correlation between the involved turbulence variables. Since the basic assumptions for the applicability of the MOST approach—horizontally homogeneous and flat conditions—are violated, the analysis is performed based on a local similarity hypothesis. The scaled standard deviations as a function of local stability are compared with previous studies from horizontally homogeneous and flat terrain, horizontally inhomogeneous and flat terrain, weakly inhomogeneous and flat terrain, as well as complex terrain. As a reference, similarity relations for unstable and stable conditions are evaluated using turbulence data from the weakly inhomogeneous and flat terrain of the Cabauw experimental site in the Netherlands, and assessed with the same post-processing method as the i-Box data. Significant differences from the reference curve and also among the i-Box sites are noted, especially for data derived from the i-Box sites with steep slopes. These differences concern the slope and the magnitude of the best-fit curves, illustrating the site dependence of any similarity theory.     

Anisotropy of Unstably Stratified Near-Surface Turbulence

Boundary-Layer Meteorology - Classic Monin–Obukov similarity scaling states that in a stationary, horizontally homogeneous flow, in the absence of subsidence, turbulence is dictated by the...     

The development and structure of the Croatian economy

The first part of the article deals with the general and historical conditions of the development of the Croatian economy, with an emphasis on industry as the dominant branch. The relatively favorable developmental possibilities of Croatia are stressed, with the combination of the agrarian Pannonian region, the forested stock-farming highland regions and the tourism-transit front of the Adriatic. The basic data on periods of historical development are mentioned, with an explanation of the five developmental stages.The second half of the article deals with a thorough analysis of the basic processes of the restructuring of the Croatian economy. Emphasis is placed on the decreased significance of agrarian and agricultural production (in 1961 Croatia had an agricultural population of 43.7%, while in 1991 it was only 9.6%), and the domination of industry, which in 1987 accounted for 35.1 percent of the employed population and 50.3 percent of the gross national product. The processes of restructuring and transition from a socialist to a market economy, as well as the wartime crisis, caused a fall in the value of industrial products to 43 percent in the years from 1990 to 1994. The branch and spatial restructuring of the economy and industry, privatization processes and the problem of increased unemployment are also analyzed.