Search results

It is now established by the global scientific community that climate change is a hard reality but the changes are complex in nature and to a great extent uncertain. Global circulation models (GCMs) have made significant contributions to the theoretical understanding of potential climate impacts, but their shortcomings in terms of assessing climate impacts soon became apparent. GCMs demonstrate significant skill at the continental and hemispheric scales and incorporate a large proportion of the complexity of the global system. However, they are inherently unable to represent local subgrid-scale features and dynamics. The first generation approaches of climate change impact and vulnerability assessments are derived from GCMs downscaled to produce scenarios at regional and local scales, but since the downscaled models inherit the biases of their parent GCM, they produce a simplified version of local climate. Furthermore, their output is limited to changes in mean temperature, rainfall, and sea level. For this reason, hydrological modeling with GCM output is useful for assessing impacts. The hydrological response due to change in climate variables in the Amu Darya River Basin was investigated using the Soil and Water Assessment Tool (SWAT). The modeling results show that there is an increase in precipitation, maximum and minimum temperature, potential evapotranspiration, surface runoff, percolation, and water yields. The above methodology can be practiced in this region for conducting adaptation and mitigation assessments. This initial assessment will facilitate future simulation modeling applications using SWAT for the Amu Darya River Basin by including variables of local changes (e.g., population growth, deforestation) that directly affect the hydrology of the region.

This chapter contextualizes the interrelationships between tourism and climate change and thus provides an introduction to this volume. It commences with a brief but comprehensive overview of the key issues identified by climate change research, including an update since the 2007 report by the Intergovernmental Panel on Climate Change as well as a brief discussion of the latest rounds of climate change negotiations. The pursuing discussion is informed by these points and explores climate change's indirect and induced impacts on tourism and possible ramifications. Both of these parts highlight behavioral change as a critical factor to both adaptation and mitigation thus motivating the psychological contribution in an effort to shed light on the obstacles to behavioral change. In the concluding section, the chapter synthesizes the discussion grounded in multiple disciplines into a set of research themes that the volume subsequently begins to address.

This chapter reflects on the approach and learning of an innovative project in Bangladesh that addresses drinking water security issues of the poor and marginal communities through participatory research, innovation, and social mobilization. The people, living in the most difficult geophysical areas, are facing severe crisis of drinking water and associated health risks due to remoteness, seasonality, social isolation, and poor institutional links. The geophysical constraints such as growing salinity, arsenic, flood and drought, and drawdown of groundwater tables have aggravated the problems. The existing government services hardly reach to the most unserved and needy people because of remoteness and lack of responsiveness of the government departments. A participatory action research project led to collective understanding about the severity of the problems and associated health risks and vulnerability. This again built greater awareness and motivated the poor, women, and marginal communities to establish links with key actors and take various local and collective actions toward ensuring their greater access to drinking water, sanitation facilities, and health services from the relevant government departments and development agencies.

No other region of the world has suffered from such devastating epidemics in the recent past than sub-Saharan Africa. HIV/AIDS poses the worst single health threat on the continent and approximately 28.5 million of people infected with HIV/AIDS are in sub-Saharan Africa, yet, less than 8% have access to treatment. As African countries start or continue to expand their HIV/AIDS treatment programs with the assistance of international donors, they are facing several ethical and health policy challenges, including difficult decisions on how to ration available treatment, the high cost of drugs, the complexity of treatment regimens, the inadequacy of health and delivery systems, the lack of knowledge about treatment, and the threat of drug resistance.