«Our results indicate that a wide range of POPs have been remobilized into the Arctic atmosphere over the past two
decades as a result of climate change, confirming that Arctic warming could undermine global efforts to reduce environmental and human exposure to these toxic chemicals,» write the scientists, whose analysis was published yesterday in the journal Nature Climate Change.
Not exact matches
Temperature during the winter
as a whole have generally decreased over the past two
decades, likely
as a
result of climate change, but the sensitivity
of ozone loss to the exact timing
of March warming events makes ozone depletion a much more variable quantity.
But even with ambitious mitigation, much
of the
climate change over the next few
decades is unavoidable
as a
result of both
climate processes and the natural lifecycle
of existing technology and infrastructure.
The Middle East has already seen
decades of drying, which is expected to intensify for the next 20 years and beyond
as a
result of climate change.
For policy - makers, the speed
of climate change over the coming
decades matters
as much
as the total long - term
change, since this rate
of change will determine whether human societies and natural ecosystems will be able to adapt fast enough to survive.New
results indicate a warming rate
of about 2.5 C per century over the coming
decades (assuming no attempt is made to reduce GHG emissions).
The interaction
of ocean circulation, which serves
as a type
of heat pump, and biological effects such
as the concentration
of carbon dioxide can
result in global
climate changes on a time scale
of decades.
As we wrote: «The clips provide a poignant, historical insight into what scientists knew about
climate change almost four
decades ago — and how the world was beginning to react in terms
of the
resulting geopolitical, technological and societal ramifications.
One
of the problems with the EPA's Endangerment TSD is the nearly complete disregard
of observed trends in a wide array
of measures which by and large show that despite
decades of increasing anthropogenic greenhouse gas emissions the U.S. population does not seem to have been adversely affected by any vulnerabilities, risks, and impacts that may have arisen (to the extent that any at all have actually occurred
as the
result of any human - induced
climate changes).
Globally, water demand will grow in the coming
decades, primarily due to population growth and increased affluence; regionally, large
changes in irrigation water demand
as a
result of climate change are likely (high confidence)[3.5.1].
Despite a half century
of climate change that has significantly affected temperature and precipitation patterns and has already had widespread ecological and hydrological impacts, and despite a near certainty that the United States will experience at least
as much
climate change in the coming
decades, just
as a
result of the current atmospheric concentrations
of greenhouse gases, those organizations in the public and private sectors that are most at risk, that are making long - term investments and commitments, and that have the planning, forecasting and institutional capacity to adapt, have not yet done so.
In a new report by the Inter-governmental Panel on
Climate Change (IPCC), experts have warned that the Coast
as we know it today will be no more in two
decades as a
result of rising ocean waters [continue reading...]
Coral reefs, which plausibly
as a
result of climate change could disappear entirely by 2100 and almost certainly will be reduced much in areal extent within the next few
decades (Hoegh - Guldberg, 1999; Mumby et al., 2007; Pandolfi et al., 2011; Ricke et al., 2013), are essentially the «rainforests
of the sea» (Knowlton and Jackson, 2008) in terms
of biodiversity.
However, long - term
climate change over many
decades will depend mainly on the total amount
of CO2 and other greenhouse gases emitted
as a
result of human activities.