The project deals with collecting data on greenhouse gas emissions on the Caltech campus. The emissions are categorized in 3 scopes. Scope 1 includes direct emissions, scope 2 indirect emissions from purchased water and electricity and scope 3 other indirect emissions. The data is used as an input in a Carbon footprint calculator, giving as an output a corresponding number of tons of carbon dio...

Black carbon (BC) emission factors were measured for a California commuter rail line fleet of diesel-electric passenger locomotives (Caltrain). The emission factors are based on BC and carbon dioxide (CO2) concentrations in the exhaust plumes of passing locomotives, which were measured from pedestrian overpasses using portable analyzers. Each of the 29 locomotives in the fleet was sampled on 4e...

Stabilizing the carbon dioxide-induced component of climate change is an energy problem. Establishment of a course toward such stabilization will require the development within the coming decades of primary energy sources that do not emit carbon dioxide to the atmosphere, in addition to efforts to reduce end-use energy demand. Mid-century primary power requirements that are free of carbon dioxi...

A series of nine large-scale, open fires was conducted in the Intermountain Fire Sciences Laboratory (IFSL) controlled-environment combustion facility. The fuels were pure pine needles or sagebrush or mixed fuels simulating forest-floor, ground fires; crown fires; broadcast burns; and slash pile burns. Mid-infrared spectra of the smoke were recorded throughout each fire by open path Fourier t a...

a r t i c l e i n f o It is generally understood that greenhouse gasses produced by human activities are having a warming effect on the climate. Discussions concerning efforts to curb carbon dioxide emissions often focus on large countries. However, considerable resources have been spent to reduce carbon dioxide emissions by relatively small, open economies. Although, these economies are small ...

We describe the implementation of a biochemical model of isoprene emission that depends on the electron requirement for isoprene synthesis into the Farquhar– Ball–Berry leaf model of photosynthesis and stomatal conductance that is embedded within a global chemistry-climate simulation framework. The isoprene production is calculated as a function of electron transport-limited photosynthesis, int...

In this research, the reactive absorption of carbon dioxide in an aqueous solution of NH3, H2O, and NaOH has experimentally been investigated. The experiments were carried out in an absorption pilot plant in different operational conditions. The composition and temperature of both gas and liquid phases were obtained during the column height. The concentration of molecular ...

In cities’ policy-making, it is a hot issue to grasp the determinants of carbon dioxide emission in Chinese cities. And the common method is to use the STIRPAT model, where its coefficients represent the influence intensity of each determinants of carbon emission. However, less work discusses estimation accuracy, especially in the framework of non-normal distribution and heterogeneity among cit...

The electricity sector is a major source of carbon dioxide emissions that contribute to global climate change. Switching from fossil fuels to renewable fuels such as geothermal, biomass or wind would help to reduce carbon emissions from electricity generation. This research analyzes the costs and carbon emission consequences of three policies to promote the use of renewables to generate electri...

On December 19, 2017, China announced the official start of its national emission trading system (ETS) construction program. When fully implemented, this program could more than double the volume of worldwide carbon dioxide emissions covered by either tax or tradable permit policy. Many of program’s design features follow experience with China’s pilot programs but contrast with much of the expe...