Different emissions scenarios were developed by IPCC which have been widely used in the analysis of possible climate change impacts and options to mitigate climate change. Each emission scenario represents different demographic, social, economic, technological and environmental developments which are driving forces of greenhouse gas emissions. “The A1 scenario family describes a future world of rapid economic growth, global population that peaks at mid-century and declines thereafter, and the rapid introduction of new and more efficient technologies” (IPCC, 2000). The A1B emission scenarios are one of the A1 group scenarios which assume the balanced use of energy system like fossil fuel and non-fossil energy system. The B2 scenario families focus on local and regional environmental protection and social equity where global population will increase continuously with comparatively lower rate with intermediate level of economic development and less rapid
and more diverse technological developments than A1 or B1. Climate change projections for all continents and sub continental regions of the world were provided by IPCC (IPCC, 2007). These projections were generated using multi model data set (MMD) and three emission scenarios B1, A1B and A2. However, the results of most projections were presented and discussed by IPCC on the basis of A1B scenario as the global mean surface temperature responses in the ensemble mean of the MMD model follows a ratio of 0.69:1:1.7 for B1: A1B:A2 scenarios. The local temperature responses for almost all regions also follow the same ratio. Similar to the IPCC regional climate projections, we used the MMD-A1B projection scenario to predict and discuss the future temperature related dengue risk in Dhaka.