From the February 13, 2007 edition.
Time to begin 'adapting' to climate change?
The World Bank is hiring experts in 'adaptation' to a warming world. Coastal
planners are starting to take it into account.
By
Peter N. Spotts | Staff writer of The Christian Science Monitor
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At the World Bank in Washington, officials have posted some new "help
wanted" signs. The bank is looking for a few good specialists (two,
to be precise) to focus on adapting to global warming. It's a small beginning,
perhaps. Still, the ads represent one signal that adaptation is emerging
from the political doghouse to take its place among the front-rank options
for dealing with climate change.
At
least in the developed world, the idea that people should start figuring
out how to deal with the projected effects of warming – changing temperature
and rainfall, shifts in growing seasons, more bouts of severe weather, and
rising sea levels – has been overshadowed by calls to reduce carbon-dioxide
emissions. Some environmentalists have viewed adaptation either as a white
flag on the issue or as a refuge of contrarians who pooh-pooh the broad
consensus that human activity is warming the climate.
But last week's release of a report on the science of global warming – with
its projections of warming based on emissions already in the air, as well
as on potential future emissions trends – has helped underscore the need.
"Climate change is here and now," notes Ian Noble, a senior climate-change
specialist at the World Bank. "We have to adapt."
Wet and dry conditions.
In some cases, adaptation can be politically wrenching.
Australia, for example, is facing the worst drought in a century. The drought's
length and severity is consistent with some projections of global warming,
several scientists note. The national government has proposed a controversial,
$2.5-billion (Australian) plan to wrest control of the withering Murray-Darling
river basin – the country's largest river system – from the four states
in eastern Australia that draw water from it. Meanwhile, Queensland has
adopted regulations that since last March have required each new home in
the state to draw nearly 40 percent less water than pre-2006 homes. In some
towns, building codes specify the installation of large holding tanks to
capture and store rain for use in gardens and to flush toilets.
If Australia represents the dry end of the adaptation spectrum in the developed
world, New Orleans and the Gulf Coast may well represent the wet end. The
region is still struggling to recover from hurricanes Katrina and Rita in
2005. The tragedy surrounding those two storms underline just how maladapted
major population centers in the region are to today's conditions, let alone
those that might hold in 2050 or 2100, experts say.
The latest draft of Louisiana's master plan for a "sustainable coast" contains several provisions, which are a direct response to the prospects for rising sea levels, increased hurricane intensity, and other effects of global warming, notes Jonathan Porthouse, executive director of the interagency planning team.
In
the group's view, coastal Louisiana will be one of the first regions to feel
global warming's imprint. Ironically, the potential for reductions in freshwater
supplies in the western part of the state – already facing a water-management
challenge – may grow, Mr. Porthouse says. The Mississippi River drains water
and sediment from 40 percent of the US, he notes. Changes in flow upstream
could have a serious effect on efforts to restore Louisiana's wetlands as
well as on the fresh water available to the state.
One element that should help guide the region's adaptation measures is a hydrology
model developed over the past two years at the University of Louisiana at
Lafayette. "We're at the point now where we can play what-if games in
the virtual world to see what would be effective ... it's now starting to
bear fruit," he says."The reality is that we should be adapting"
and tackling carbon-dioxide emissions at the same time, notes Roger Pielke
Jr., a science-policy specialist at the University of Colorado at Boulder.
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