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Displaying 1221 - 1225 of 1605application of the social tenure domain model (STDM) to family land in Trinidad and Tobago
Family land is a form of communal tenure found in some of the countries of the English-speaking Caribbean inclusive of Trinidad and Tobago. It has been problematic to administer, is sometimes the source of land conflict and litigation, it has been seen as the cause of many land-related problems such as land degradation and fragmentation, and has therefore been targeted for eradication by land title registration programmes. Informal occupation of many years standing on state and private land is also widespread in Trinidad and Tobago.
Atmospheric CO₂ consumption by chemical weathering in North America
CO₂ consumption by chemical weathering is an integral part of the boundless carbon cycle, whose spatial patterns and controlling factors on continental scale are still not fully understood. A dataset of 338 river catchments throughout North America was used to empirically identify predictors of bicarbonate fluxes by chemical weathering and interpret the underlying controlling factors. Detailed analysis of major ion ratios enables distinction of the contributions of silicate and carbonate weathering and thus quantifying CO₂ consumption.
Using spatio-temporal modeling to predict long-term exposure to black smoke at fine spatial and temporal scale
Whilst exposure to air pollution is linked to a wide range of adverse health outcomes, assessing levels of this exposure has remained a challenge. This study reports a modeling approach for the estimation of weekly levels of ambient black smoke (BS) at residential postcodes across Northeast England (2055km²) over a 12 year period (1985–1996). A two-stage modeling strategy was developed using monitoring data on BS together with a range of covariates including data on traffic, population density, industrial activity, land cover (remote sensing), and meteorology.
Quantification of aboveground rangeland productivity and anthropogenic degradation on the Arabian Peninsula using Landsat imagery and field inventory data
The productivity of semi-arid rangelands on the Arabian Peninsula is spatially and temporally highly variable, and increasing grazing pressure as well as the likely effects of climatic change further threatens vegetation resources. Using the Al Jabal al Akhdar mountains in northern Oman as an example, our objectives were to analyse the availability and spatial distribution of aboveground net primary production (ANPP) and the extent and causes of vegetation changes during the last decades with a remote sensing approach.
Impacts of conservation buffers and grasslands on total phosphorus loads using hydrological modeling and remote sensing techniques
To better assess the impacts of conservation buffers and grasslands on water quality at large spatial scales, development and integration of novel approaches are crucial to ensure that these land management practices are functioning properly and meeting their original goals. Recent developments in remote sensing technology have greatly enriched the availability of geospatial data that can be used in hydrological modeling to assess the potential hydrological response of conservation practices over larger areas.