What does global warming potential GWP refer?
The Global Warming Potential (GWP) was developed to allow comparisons of the global warming impacts of different gases. Specifically, it is a measure of how much energy the emissions of 1 ton of a gas will absorb over a given period of time, relative to the emissions of 1 ton of carbon dioxide (CO2).
What is a GWP value?
Global warming potential (GWP) is a measure of the relative global warming effects of different gases. It assigns a value to the amount of heat trapped by a certain mass of a gas relative to the amount of heat trapped by a similar mass of carbon dioxide over a specific period of time.
What determines GWP?
Three key factors determine the GWP value of a GHG: the ability of the gas to absorb infrared radiation, where along the electromagnetic spectrum (i.e., what wavelengths) the gas absorbs radiation, and. the atmospheric lifetime of the gas.
Which gas has the highest GWP?
Carbon dioxide is used as the base for all the calculations, so its global warming potential is 1. 2 The higher the GWP, the more heat the specific gas can keep in the atmosphere….Table 1: High Global Warming Potential Gases.
|Global Warming Potentials of Greenhouse Gases|
What gases have the lowest GWP?
According to the California Air Resources Board, that would be R-717, which has a 100-year GWP of 0. R-717 goes by the trade name Ammonia, which has been around since the 1930s. Experts today recognize it as the most efficient refrigerant in the world.
What is the GWP of natural gas?
Methane is assumed to have a GWP of 21 as currently used in the U.S. GHG Inventory. energy5, or roughly 8 percent of total natural gas end-use in the U.S. CH4 emissions occur from equipment across the natural gas supply chain that emits methane as part of normal operations and from unplanned leaks.