Sentences with phrase «emissions over that time span»

This is despite the prodigious amounts of new CO2 emissions over that time span - recall, as the chart indicates, the influence of CO2 has declined.

Not exact matches

Urban areas and their aging natural gas pipes and valves are also responsible for a lot of methane emissions, which is about 35 times as potent as a greenhouse gas over the span of 100 years and makes up about 10 percent of all U.S. greenhouse gas emissions in terms of CO2 equivalents.

Methane is a greenhouse gas up to 35 times as potent as carbon dioxide as a driver of climate change over the span of a century, and landfills are the United States» third largest source of methane emissions, according to the EPA.

When CH4, CO2, and N2O emissions are combined, our synthesis suggests that reservoir water surfaces contribute 0.8 Pg CO2 equivalents per year over a 100 - year time span (fifth and ninety - fifth confidence interval: 0.5 — 1.2 Pg CO2 equivalents per year), or approximately 1.5 % of the global anthropogenic CO2 - equivalent emissions from CO2, CH4, and N2O reported by the IPCC (table 1; Ciais et al. 2013) and 1.3 % of global anthropogenic CO2 - equivalent emissions from well mixed GHGs overall (Myhre et al. 2013).

To describe the relative contribution of various GHG emissions to global warming, emissions were converted to CO2 equivalents, a metric that relates the radiative forcing caused by 1 mass unit of trace GHG to that caused by the emission of 1 mass unit of CO2 over a given time span.

And as the chart indicates, for the subsequent 190 months, that 1998 peak was never topped, despite an average 29.5 billion new tons of CO2 emissions per year over that time span.

The interesting thing is that the current absolute limit on net anthropogenic greenhouse emissions should be a low or probably even negative number designed to plateau and then reverse the atmospheric CO2 concentration back to pre-industrial levels over an agreed reasonable time span.

Compare the emissions and temperature graphs with the increase in the atmosphere over a longer time span:

What gets me is that from 1910 to about 1940 we saw nearly identical temperature increase over nearly an identical span of time at a point when human CO2 emissions could not possibly have been a factor.

As the quoted ~ 2,000 GtCH4 was the «potential» size of emissions and 1,000 years the shortest of a range of time - spans (let's call it 2,000 GtCH4 released smoothly over 5,000 years), with no «Shakhova event» happening the Arctic CH4 feedback would more likely equal present CH4 forcing and is thus equal in force to about 13 years - worth of today's CO2 emissions, or less for +5,000 years.

The higher figures are similar to anthropogenic C emissions, albeit over a much longer time span (> 20 ky).

The 20 % is the increase in additional CO2 levels over a period of in average 8 years, caused by emissions increasing by 22 % over the same time span...