Sentences with phrase «globally averaged concentrations»

The globally averaged concentration of CO2 reached 400 parts per million, and the global average temperature climbed to more than 1 °C (1.8 °F) above pre-industrial levels.

Not exact matches

... Most of the observed increase in globally averaged temperatures since the mid-20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations.

[1] CO2 absorbs IR, is the main GHG, human emissions are increasing its concentration in the atmosphere, raising temperatures globally; the second GHG, water vapor, exists in equilibrium with water / ice, would precipitate out if not for the CO2, so acts as a feedback; since the oceans cover so much of the planet, water is a large positive feedback; melting snow and ice as the atmosphere warms decreases albedo, another positive feedback, biased toward the poles, which gives larger polar warming than the global average; decreasing the temperature gradient from the equator to the poles is reducing the driving forces for the jetstream; the jetstream's meanders are increasing in amplitude and slowing, just like the lower Missippi River where its driving gradient decreases; the larger slower meanders increase the amplitude and duration of blocking highs, increasing drought and extreme temperatures — and 30,000 + Europeans and 5,000 plus Russians die, and the US corn crop, Russian wheat crop, and Aussie wildland fire protection fails — or extreme rainfall floods the US, France, Pakistan, Thailand (driving up prices for disk drives — hows that for unexpected adverse impacts from AGW?)

... Polar amplification explains in part why Greenland Ice Sheet and the West Antarctic Ice Sheet appear to be highly sensitive to relatively small increases in CO2 concentration and global mean temperature... Polar amplification occurs if the magnitude of zonally averaged surface temperature change at high latitudes exceeds the globally averaged temperature change, in response to climate forcings and on time scales greater than the annual cycle.

There are very few publishing scientists that do not endorse the IPCC (2007) conclusions that most of the observed increase in globally averaged temperatures since the mid-20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations.

The statement is compatible with what the IPCC say - «Most of the observed increase in globally averaged temperatures since the mid-20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations».

Outdoor air pollution targets to reduce concentrations of particulate matter (PM 2.5), globally averaged, return less than $ 1 for every dollar spent.

Ammann highlights the IPCC 2007 key sentence: «Most of the observed increase in globally averaged temperatures since the mid-20th century is very likely (> 90 % confidence) due to the observed increase in anthropogenic gas concentrations.»

On page 8 of the IPCC SPM to AR4 of WG1, we find «Most of the observed increase in globally average temperatures since the mid-20th century is very likely due to the observed increase in anthropogenic gas concentrations».

It should say something like «Although CO2 concentrations in the atmosphere have risen in line with earlier projections, globally - averaged temperature observations have risen less than projected and are currently at or below the low end of the range in past IPCC assessments.»

«Most of the observed increase in globally averaged temperatures since the mid-20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations.

The world's leading climate scientists recently concluded it is very likely that most of the observed increase in globally averaged temperatures since the mid-20th century is due to the increase in greenhouse gas concentrations.

«Most of the observed increase in globally averaged temperatures since the mid 20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations.»

The claim that «Most of the observed increase in globally averaged temperatures since the mid 20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations.»

For example, from the most recent SPM, «The Working Group I Fourth Assessment concluded that most of the observed increase in the globally averaged temperature since the mid-20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations.

The report confirms that most of the observed increase in globally averaged temperatures since the mid-20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations and that discernible human influences now extend to other aspects of climate, including ocean warming, continental - average temperatures, temperature extremes and wind patterns.

«The correspondence between atmospheric CO2 concentrations and globally averaged surface temperatures in the recent past suggests that this coupling may be of great antiquity.

Understanding how globally - averaged methane concentrations have fluctuated in the past few decades — and particularly why they have increased significantly since 2007 — has proven puzzling to researchers.

Taken together, the average of the warmest times during the middle Pliocene presents a view of the equilibrium state of a globally warmer world, in which atmospheric CO2 concentrations (estimated to be between 360 to 400 ppm) were likely higher than pre-industrial values (Raymo and Rau, 1992; Raymo et al., 1996), and in which geologic evidence and isotopes agree that sea level was at least 15 to 25 m above modern levels (Dowsett and Cronin, 1990; Shackleton et al., 1995), with correspondingly reduced ice sheets and lower continental aridity (Guo et al., 2004).

So when they say that most of the observed increase in globally averaged temperatures since the mid-20th century is «very likely» due to the increase in greenhouse gas concentrations caused by anthropogenic emissions, they mean that there's a > 90 % chance that it is the case.

The Mauna Loa data are being obtained at an altitude of 3400 m in the northern subtropics, and may not be the same as the globally averaged CO2 concentration at the surface.