Vegetation and seasonality shifts during the Late Quaternary deduced from 13C/12C ratios of grazers at Equus Cave, South Africa
Cape Province ; Climatic variation ; Grassland ; Lateglacial ; Palaeoclimate ; Precipitation ; Quaternary ; Seasonality ; South Africa
Season of rainfall can be a major influence on the relative proportions of C3 and C4 grasses in a landscape, since their relative distribution is essentially constrained by temperatures during the growing season. The aim of this paper
was to investigate the nature and extent of C3/C4 vegetation shifts over the Late Quaternary, and thus obtain a record of the season of rainfall for the area surrounding Equus Cave in the northern Cape Province. 13C/12C ratios in tooth enamel carbonate of grazers
Spatial and temporal variations in bank erosion on sand-bed streams in the seasonally wet tropics of northern Australia
Australia ; Bank erosion ; Erosion rate ; Gully erosion ; Northern Territory ; Riparian vegetation ; Seasonal variation ; Sediment budget ; Stream ; Tropical zone
of 1998/99 wet season to end of 2001/02 wet season) at 3 spatial scales : a discontinuous gully, a small continuous channel on an alluvial fan, and three medium-sized continuous channels with riparian vegetation. The AA. compare bank erosion rates between
different wet and dry seasons. They determine the influence of bank profile form and channel planform on erosion rates.
This study aims to identify the geographical patterns of seasonal rainfall in China, examine the temporal variability in each precipitation region for various seasons and to investigate the relationships between seasonal rainfall patterns
A destructive tropical cyclone season in the SW Indian Ocean : January-February 1984
The characteristics of a destructive tropical cyclone season in the South West Indian Ocean are analyzed. The areas of cyclogenesis and dissipation are examined. The development of Cyclone Demoina is tracked. - (AJC)
Vector analysis as a means of indicating rainfall seasonality in the Transvaal
Vector analysis was applied to rainfall statistics for 200 stations in the Transvaal to show seasonality. The results were compared with earlier analyses and vector analysis was shown to be the most powerful technique. - (AJC)
Ch onnosc na tle sezonowych zmian srodowiska przyrodniczego Capacity of absorbing tourists in terms of seasonal changes in the natural environment
The degradation of the environment depends upon the scale of tourism, and its intensity is affected by the seasonal variableness in tourist arrivals. In order to prevent it, indispensable is a suitable control of the tourist frequency by means
Regolith behaviour and physical weathering of clayey mudrock as dependent on seasonal weather conditions in a badland area at Vallcebre, Eastern Pyrenees
This work describes some properties of the regolith through the seasons, together with the known factors that control physical weathering (humidity and temperature oscillations), and some of the hydrological and erosive controls effected
A statistical derived index, known as the Precipitation Concentration Index is presented to be used in quantifying the relative distribution of the rainfall patterns. Two different calculations procedures were used for deriving the PCI (seasonal
Usable science : an assessment of long-term seasonal forecasts amongst farmers in the rural areas of South Africa
Agriculture ; Agroclimatology ; Climate ; Forecast ; Rural area ; Seasonal variation ; South Africa
The science of long-term climate seasonal forecasts is well developed. While much is done to produce forecasts little has been done to assess their uptake and value particularly for rural farmers in South Africa. A study of North West Province
The earth's seasonal cycle of insolation, determined by orbital geometry, governs the seasonal cycle of surface temperature. The insolation is zonally symmetric, but the asymmetric land-sea distribution results in a seasonal temperature cycle
with distinct zonal asymmetries. This geographical filtering of the seasonal insolation is of interest in paleoclimate studies because perturbations in insolation, caused by variations in earth's orbital configuration, have been linked to climate fluctuations.
that statistically significant temperature departures from seasonal normals are associated with ENSO events and are characterized by positive anomalies in all seasons but especially in the key season of the event year and in the winter following the key season
The relationships between the Southern Oscillation Index and the seasonal rainfall of Sri Lanka reveal strong seasonal dependencies. Periodicities in seasonal rainfall in the longterm fluctuations of Sri Lanka are very similar to the dominant
Method of directional statistic was used to express spatial dissimilarity of flood occurrence seasonality. Output resulting from application of this method is determination of the flood occurrences mean day within the year in the examined river
Flood frequency and seasonality in the Sázava river catchment based on historical cases
Czech Republic ; Flood ; Historical account ; Nineteenth Century ; Seasonality ; Sixteenth Century
of the years 1515 and 1891. Each individual flood also includes a classification according to time occurrence and, at the end, a discussion on seasonality of all documented events. - (EN)
Today, potentials offered by the various geograpical types of the spaces of tourism and recreation have to be re-assessed from many aspects. With this, one of tourism’s fundamental problems, i.e. seasonality can also be approached from a new
perspective. As unequivocally seen from our data and calculations, it is required to draw a statistically more differentiated picture in the case of periods formerly regarded as off-season. In the case of Mátra Region (N-Hungary), ski-tourism developments
resulted in observable changes in the management of seasonality-related problems. - (AM)
Straw coverage alleviates seasonal variability of the topsoil microbial biomass and activity
Agricultural practice ; Agropedology ; China ; Cultivated land ; Experiment plot ; Maize ; Micro-organism ; Mulching ; North-Eastern China ; Seasonal variability ; Soil properties ; Soil temperature
Seasonal variability of microbial biomass carbon (MBC) and basal respiration (BR) in surface soil was compared between conventional straw removal (SR) and straw coverage (SC) in a maize field experiment, Northeast China. The straw coverage treatment
significantly increased microbial energy, carbon and nutrient sources (soil C and N contents) and improved soil physical environment (moisture and porosity), and thus stimulated MBC and BR across the growth season of maize, as compared to the straw removal
treatment. MBC and BR showed similar seasonal trends in soil temperature, with maximum values in summer. In both study years, the straw coverage treatment reduced seasonal variation of soil temperature, therefore it significantly moderated seasonal
variability of MBC and BR. These results demonstrate that straw coverage contributes to stabilizing soil microbial characteristics in season.
A synoptic climatology of cool-season derecho events
This paper examines synoptic environments associated with cool-season derechos, 1986 to 1995, those events occurring between September and February. Commonalities within the synoptic environments of these events are identified and illustrated
in order to recognize favorable conditions for the development of cool season derecho-producing mesoscale convective systems (DMCSs).