The orthodox explanation for that one is that the cooling effect of white aerosols such as sulphates — released from coal and oil burning — was masking the warming
effect of greenhouse gases until various clean air acts allowed the anthropogenic warming trend to re-emerge.
Not exact matches
«It takes a long time to turn around the
effects of greenhouse gases,» Scambos says, «so you don't want to wait
until we're on the brink
of having major changes in sea level before you address these problems.»
If you know there is some
effect of carbon emissions (and CFCs, etc.) on climate, and are unclear how to reverse the
effects later on, then the risk - averse thing to do is limit
greenhouse gas emissions
until more is known.
That means the full warming
effect of the
greenhouse gases we release into the atmosphere might not materialise
until decades or centuries later.
Once the deal takes
effect, industrialized countries will have
until 2012 to cut their collective emissions
of six key
greenhouse gases to 5.2 percent below the 1990 level.
The second issue raised in our Science paper (now available free, see bottom
of this post) is that perhaps there shouldn't yet have been substantial long - term trends in hurricane intensity — whether we would be able detect them above the natural variability or not — because
until the last couple
of decades, aerosol cooling
effects on hurricanes have been counteracting the
effects of greenhouse gas warming.
The study estimates climate sensitivity — how much the world will warm when carbon dioxide levels increase * — from changes in observed temperatures and estimates
of the warming
effect of greenhouse gases and other drivers
of climate change, from the mid / late 19th century
until 2016.
Yesterday, we released our annual survey
of the voluntary carbon markets, which takes stock
of what individuals, corporations, and governments have been doing to offset their
greenhouse -
gas emissions
until the Paris Agreement takes
effect — which could happen as early as next year.
If the Maunder and Dalton minima actually did affect the climate, then a new one might counteract the
effects of the extra
greenhouse gases people are now pumping into the atmosphere — at least,
until the solar cycle returns.