Sentences with phrase «present day levels»

In the second simulation we reduce the aerosols to the natural concentrations (called pre-industrial ~ 1885) and keep the greenhouse gases constant at present day level (~ 1985).

The model suggests atmospheric oxygen was likely at around 10 % of present day levels during the two billion years following the Great Oxidation Event, and no lower than 1 % of the oxygen levels we know today.

«Even if you could stabilize greenhouse gas concentrations in the atmosphere at present day levels, the system has a certain amount of thermal inertia and would take several more decades to stabilize,» Meehl said.

Colder temperatures from 1500 - 750 BC caused renewed ice growth in continental glaciers and alpine glaciers, and a sea level drop of between 2 to 3 meters below present day levels.

Since 2009 the prime lending rate has shifted from a high of 6 % down to 2 % range remaining fairly level for the past few years before rising to a present day level of 3.45 %.