The climate scientists behind the report are less ready, however, to predict what
the specific impacts of global warming will look like in the coming decades, meaning it won't be very useful for regional planners.
Geoengineering proposals fall into at least three broad categories: 1) managing atmospheric greenhouse gases (e.g., ocean fertilization and atmospheric carbon capture and sequestration), 2) cooling the Earth by reflecting sunlight (e.g., putting reflective particles into the atmosphere, putting mirrors in space to reflect the sun's energy, increasing surface reflectivity and altering the amount or characteristics of clouds), and 3) moderating
specific impacts of global warming (e.g., efforts to limit sea level rise by increasing land storage of water, protecting ice sheets or artificially enhancing mountain glaciers).
Not exact matches
Remember that when you add up all the
specific impacts of the type that we have been reviewing here, the total economic costs at 40C
of warming — which we would expect to reach sometime into the 22nd century — are estimated by the IPCC to be about 1 — 5 %
of global GDP (See WG2 SPM, page 17)
Resolving this dilemma must include a serious look at potential «winners and losers»
of a marginally
warmer world, as well as at the best available cost / benefit analyses
of the
specific proposals being made to» reshape our common future on a
global scale» and their total costs including the
impacts of all unintended consequences.
More broadly, draft White House guidance to federal agencies on environmental
impact assessment
of proposed federal actions such as energy development permits, which has languished for four years, could move the system toward analyzing
specific proposed projects within a larger context
of cumulative
global warming impacts.
Given the detectable
impacts of a
warmer planet on society, the presentation will argue as to what level
of global warming is dangerous for
specific sectors.
The shift provides additional evidence that changes in the Arctic are not only directly because
of global warming, as shown by
warmer air and sea temperatures, but are also part
of an «Arctic amplification» through which multiple Arctic -
specific physical processes interact to accelerate temperature change, ice variability, and ecological
impacts.
When you look at the
impacts of a climate change or
specific adaptations to a climate change, you often need to know how a
global warming will affect the local climate.