Sentences with phrase «maximum global average warming»

At a maximum global average warming of 2 °C above the norm for most of human history, the Arctic could become technically ice - free once every three to five years.

Not exact matches

«They show that it is technically feasible to achieve a central goal in global climate policy: Namely, to limit average global warming to a maximum of two degrees Celsius compared to the level at the beginning of the Industrial Era.»

If long - term global warming is to be limited to a maximum of 2 °C elsius above preindustrial values, average annual per - capita emissions in industrialized nations will have to be reduced by around 80 - 95 % below 1990 levels by 2050.

spalding craft (2)-- Actually, there is an overwhelming abundance of evidence that the climate warmed to a maximum, so - called optimum, temperature at different times in different regions, but about 8 — 6 thousand years ago; it had been cooling, on average since until humans started added considerable quantities of global warming (so - called greenhouse) gases started in, say, 1850 CE.

For example, during the «Holocene thermal maximum,» the warmest period of the past 10,000 years, the Arctic average temperature was two to three degrees warmer than it is today, while the global average was only a degree or so warmer.

The sea level high - stand was associated with the so - called Climatic Optimum or the Holocene Optimum, during 8000 to 4000 BC when average global temperatures reached their maximum level during the Holocene and were warmer than present day.

When we selected the interval time in 3 years around the peak of maximum and minimum of the solar cycle, the global warming period had average of (27.1 ± 5.5) % and (32.1 ± 4.4) %, respectively and the global cooling period showed an average of (32.7 ± 11.1) % and (21.3 ± 5.0) %, respectively.

IPCC: It is very likely that the global warming of 4 °C to 7 °C since the Last Glacial Maximum occurred at an average rate about 10 times slower than the warming of the 20th century.

The Climatic Optimum: «By 5000 to 3000 BC average global temperatures reached their maximum level during the Holocene and were 1 to 2 degrees Celsius warmer than they are today.

This level would in turn give humanity a 50 % chance of limiting global warming to the internationally agreed limit of a maximum 2 °C global average temperature rise.

Backing that up, NASA says that 1) sea surface temperature fluctuations (El Niño - La Niña) can cause global temperature deviation of about 0.2 °C; 2) solar maximums and minimums produce variations of only 0.1 °C, warmer or cooler; 3) aerosols from natural sources such as volcanic eruptions (Mount Pinatubo for example) have caused average cooling of 0.3 °C, but recent eruptions have had not had significant effect.

The oceans take longer to stop warming but because of the ongoing reduction in forcing, the global average temperature reaches its maximum in not much more than a decade.