Fire Earth

Earth is fighting to stay alive. Mass dieoffs, triggered by anthropogenic assault and fallout of planetary defense systems offsetting the impact, could begin anytime!

Posts Tagged ‘atmospheric methane’

Atmospheric GHG Break Record

Posted by feww on November 21, 2011

Concentration of greenhouse gases in the atmosphere reached record high in 2010: WMO

The atmospheric GHG rose faster in 2010 than the decadal average.

Disaster Calendar 2011 – November 21

[November 21, 2011]  Mass die-offs resulting from human impact and the planetary response to the anthropogenic assault could occur by early 2016.  SYMBOLIC COUNTDOWN: 1,577 Days Left to the ‘Worst Day’ in Human History

  • Global Mega Disasters. The concentration of greenhouse gases in the atmosphere reached record high in 2010, according to WMO. The atmospheric GHG rose faster in 2010 than the decadal average.
    • Carbon dioxide (CO2) concentration has risen by 39 percent to 389 parts per million (ppm) since 1750.
    • Methane (CH4) concentration has climbed by 158 percent since 1750 to a record high of 1,808 parts per billion(ppb), and up by 5 ppb since 2009.
    • Nitrous oxide (N2O) levels were 20 percent higher at 323.2ppb   than the pre-industrial era.
    • According to the latest Greenhouse Gas Bulletin, the seventh in the series that began in 2004, there has been a 29 percent rise in radiative forcing from greenhouse gases between 1990 and 2010.
    • The atmospheric CO2 rose by 2.3ppm in 2010 compared to 2.0ppm in the previous year and the annual average of 1.5 ppm in the 1990s.
    • “The atmospheric burden of greenhouse gases due to human activities has yet again reached record levels since pre-industrial time,” said WMO Secretary-General.
    • “Even if we managed to halt our greenhouse gas emissions today, and this is far from the case, they would continue to linger in the atmosphere for decades to come and so continue to affect the delicate balance of our living planet and our climate,” he added.

Recent monthly mean carbon dioxide globally averaged over marine surface sites. Source: NOAA

Weekly average CO2 at Mauna Loa

  • Week of November 13, 2011:     390.32 ppm
  • Weekly value from 1 year ago:     388.40 ppm
  • Weekly value from 10 years ago:     369.79 ppm

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GHG Concentration at Record Level: WMO

Posted by feww on November 24, 2010

Brief History of Mankind

Greenhouse gases in the atmosphere at record levels: the World Meteorological Organization (WMO)

The average mixing ratios of carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) reached record level in 2009,WMO reported.

  • CO2 concentrations ~ 386.8 ppm
  • CH4 ~ 1,803 ppb
  • N2O ~ 322.5 ppb

These values are greater than the corresponding atmospheric concentrations in pre-industrial times (~1750) by 38%, 158% and 19%, respectively.

In the twenty year period between 1990 and 2009, the combined radiative forcing—the balance between atmosphere’s incoming and outgoing radiation—for all persistent greenhouse gases increased by 27.5%, with CO2 accounting for about 80% of the increase, according to the NOAA Annual Greenhouse Gas Index.

Source: WMO GHG Bulletin

Carbon Dioxide (CO2)

Carbon dioxide is the single most important anthropogenic greenhouse gas in the atmosphere, contributing 63.54 %2 to the overall global radiative forcing. It is responsible for 85% of the increase in radiative forcing over the past decade and 83% over the last five years. For about 10 000 years before the industrial revolution, the atmospheric abundance of CO2 was nearly constant at ~ 280 ppm (ppm = number of molecules of the gas per million molecules of dry air). This level represented a balance among the atmosphere, the oceans and the biosphere. Since 1750, atmospheric CO2 has increased by 38%, primarily because of emissions from combustion of fossil fuels (8.7 Gt carbon in 2008,, deforestation and landuse change. High-precision measurements of atmospheric CO2 beginning in 1958 show that the average increase in CO2 in the atmosphere (airborne fraction) corresponds to ~ 55% of the CO2 emitted by fossil fuel combustion. WMO

Source: WMO GHG Bulletin

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