Sentences with phrase «temperatures over the threshold»

Not exact matches

And while the pledges are not enough to keep global temperatures from rising above the scientifically agreed - upon threshold of 2 degrees Celsius over preindustrial levels, leaders said the efforts significantly improve the chances of getting there.

Dr. Jerison studies systems governed by simple rules that nonetheless exhibit complex behaviors, such as phase transitions — for instance, when a slight temperature increase causes ice to melt into liquid water; and threshold phenomena — for instance, when a small extra deposit of soil causes a stable slope to topple over into a landslide.

Wet bulb globe temperature is the heat stress metric used by the International Organization for Standardization, and it has well - validated thresholds for when humans can safely work, giving it advantages over alternative metrics such as heat index, said study co-author Chao Li, a hydroclimatology scientist at the University of Victoria in Canada.

There is nothing «natural» about these extremes of weather over the last 2 years, or about the unprecedented ozone hole in the Arctic last year (troposphere warming from greenhouse gases caused stratospheric cooling to below threshold temperature for polar stratospheric cloud generation and ozone destruction).

However, the critical threshold R C is independent of ɛ, and thus the calculation depends only on relatively robust averaged values of precipitation, net radiation, average temperature difference between land and ocean, specific humidity over ocean, and the natural constants ρ, L, and C p.

A carbon budget is the cumulative amount of carbon dioxide (CO2) emissions permitted over a period of time to keep within a certain temperature threshold.

Areas shown in dark blue have not accumulated thermal stress over the previous 12 weeks, meaning that the temperature had not crossed the local bleaching threshold.

Events are defined based on the exceedence of temperature thresholds and their changing odds are measured over a range of pre-specified thresholds, which means assessments can be made as soon as a new event happens.

But even then your expected population - at - treeline response function would be had by integrating over a population of tree - specific threshold temperatures C * (t)(t indexes tree types, not time... there would be an F (t) c.d.f. at treeline.).

By setting a temperature goal any higher than 1.5 °C or a long term goal any later than 2050, we risk shooting over to the threshold of very dangerous.

Heat stress was also declining; they reported that the number of days with extreme temperatures over 90.5 °F and over the 90th percentile threshold peaked during the droughts of the 1930s and 1950s.

All Pledges Fall Short of the Science Ultimately, though the emission cuts proposed for 2020 by the Kyoto Protocol members are dramatically more robust than those being mulled over in the Washington, none are in the 25 - 40 % range which scientists say is required to keep global average temperature rise below the critical threshold of 2 °C.