To assess the effectiveness of urban energy conservation and GHGmitigation measures, a detailed Longrange Energy Alternatives Planning (LEAP) model is developed and applied to analyze the future trends of energy demand and GHG emissions in Xiamen city. Two scenarios have been designed to describe the future energy strategies in relation to the development of Xiamen city. The ‘Business as Usual’...

Geoengineering (the intentional modification of Earth's climate) has been proposed as a means of reducing CO2-induced climate warming while greenhouse gas emissions continue. Most proposals involve managing incoming solar radiation such that future greenhouse gas forcing is counteracted by reduced solar forcing. In this study, we assess the transient climate response to geoengineering under a b...

The number of vehicles in China has been increasing rapidly. We evaluate the impact of current and possible future vehicle emissions from China on Asian air quality. We modify the Regional Emission Inventory in Asia (REAS) for China’s road transport sector in 2000 using updated Chinese data for the number of vehicles, annual mileage, and emission factors. We develop two scenarios for 2020: a sc...

201 One cannot meaningfully evaluate solar geoengineering without a scenario for its implementation. It is now common, for example, to assert that more scientific research is needed to assess the balance between the risks and benefits of solar geoengineering, hereafter called solar radiation management (SRM). Yet the balance between risks and benefits depends at least as strongly on how SRM is ...

A B S T R A C T Carbon cycle feedbacks will have a direct effect on anthropogenic emissions required to stabilize CO 2 in the atmosphere. In this study, I used an intermediate complexity coupled climate-carbon model to quantify allowable CO 2 emissions for a series of scenarios leading to CO 2 stabilization at levels between 350 and 1000 ppmv. For all scenarios, global temperature did not stabi...

Global aerosol direct radiative forcing (DRF) is an important metric for assessing potential climate impacts of future emissions changes. However, the radiative consequences of emissions perturbations are not readily quantified nor well understood at the level of detail necessary to assess realistic policy options. To address this challenge, here we show how adjoint model sensitivities can be u...

Midcentury targets have been proposed as a guide to climate change policy that can link long-term goals to shorter-term actions. However no explicit mitigation analyses have been carried out of the relationship between midcentury conditions and longer-term outcomes. Here we use an integrated assessment modeling framework with a detailed representation of the energy sector to examine the depende...

135 Pacific Economic Bulletin volume 25 number 3 © 2010 The australian national university As a leading member of the Coalition for Rainforest Nations, Papua New Guinea (PNG) has a vested interest in proving to the international community that it could reduce the volume of greenhouse gas emissions from the process of deforestation and forest degradation if suitable financial incentives were to ...

Future air pollution emissions in the year 2030 were estimated for the San Joaquin Valley (SJV) in central California using a combined system of land use, mobile, off-road, stationary, area, and biogenic emissions models. Four scenarios were developed that use different assumptions about the density of development and level of investment in transportation infrastructure to accommodate the expec...

Information and Communication Technologies (ICT) are expected to have a great potential to reduce the GHG emissions across society, however limited data on actual reductions have been published so far. Based on available data on real GHG emission reductions realized by different ICT solutions, this paper explores the possible reductions globally within a 2030 timeframe. An average of the future...