Manhattan floods, Chicago heatwaves and withering Californian vines: how scientists see the US in the coming years
Pastor Dale Morgan
*Manhattan floods, Chicago heatwaves and withering Californian vines:
how scientists see the US in the coming years*
Hard-hitting report describes how America will be affected region by
region if no action is taken on climate change
* Suzanne Goldenberg
* guardian.co.uk, Tuesday 16 June 2009 10.47 BST
The Obama administration's long-awaited scientific report on the
sweeping and life-altering consequences of a failure to act on global
warming – Global climate change impacts in the United States – is
released today.
It provides the most detailed picture to date of the impacts on the US
in the worst case scenarios, when no action is taken to cut emissions.
Examples include: floods in lower Manhattan; a quadrupling of heatwave
deaths in Chicago; withering on the vineyards of California; the
disappearance of wildflowers from the slopes of the Rockies; the
extinction of Alaska's wild polar bears in the next 75 years.
'It encapsulates everything from the economy to human health.' Suzanne
Goldenberg on the US climate report Link to this audio
What lies ahead by region
North-east
The winter snow season could be cut in half in southern New York,
Vermont, New Hampshire and Maine — maybe as short as a week or two,
under the higher emissions scenario. This would destroy winter
traditions like skiing and skating and outdoor ponds. Native cranberries
and blueberries would disappear; dairy herds, the biggest agricultural
industry, would decline under the higher emissions scenario.
South-east
Summer temperatures in Florida could rise by 4.1C (10.5F), with the heat
effect multipled by decreased rainfall under the higher emissions
scenario. There would be increased hurricane intensity and rising sea
levels leads to loss of wetlands and coastal areas. It would lead to a
severe decline in quality of life.
Mid-west
Frequent, severe and longer lasting heatwaves in cities – as many as
three a year in Chicago under the higher emissions scenario.
Water levels in the Great Lakes could fall by up to two feet by the end
of the century under the higher emissions scenario.
South-west
Continued strong warming will threaten flow of Colorado river.
Alaska
Has been warming at twice the rate of the rest of the US over last 50 years.
Temperatures could rise up to a further 5.4C (13F) under the higher
emissions scenario. The region should be prepared for drought and
increased risk of wildfire.
North-west
Declining snowpack is already threatening agriculture. Many salmon
species are already threatened
Costs
Human health: Rise in deaths due to heatwaves, decline in health because
of poor air quality and increase in water borne and insect borne diseases.
Agriculture: Although some crops will benefit from the longer growing
season, heavy downpours could wreak havoc on others. Farmers will be
forced to use more pesticides and weed killers against invasive plants.
Poison ivy will bcome more abundant and more toxic. Higher emissions
scenario would cause a 10% decline in dairy herd in Appalachia.
Energy: Rising heat index will increase demand on electricity for air
conditioning. But water shortages could restrict electricity generation.
Oil infrastructure, along coast of Louisiana and Florida, is also
vulnerable to rising sea levels and intensifying hurricanes.
Transport: Storm surges and rising sea levels could block the use of
ports and coastal airports, roads and rail lines. Six of the top 10
freight gateways are threatened by rising sea levels. Entire road
networks on the Gulf Coast could be at risk.
Ecosystems: Large-scale shifts in species likely to continue. Deserts
will become hotter and drier, oceans more acidic. Salmon and trout
populations will contract.