In California, officials in coastal cities are becoming increasingly aware of the potential impacts of climate change, and they're preparing to deal with them.
Not so in Virginia, where even the words "sea level rise" and "climate change" are verboten. Earlier this year, state lawmakers found they could not use those phrases in requesting a study on potential impacts on Virginia's coastal cities. Reporter Scott Harper of the Virginian-Pilot said Republicans objected, fearing it would stir up conservative activists, some of whom believe such terms are liberal code words.
And in North Carolina, officials are hiding their heads in what comedian Stephen Colbert called the "soon-to-be-underwater sand."
Out in California, a survey published by Stanford University's Center for Ocean Solutions and the California Sea Grant found that a majority of California's coastal planners and resource managers now believe the threats from climate change, including rising sea levels, more floods, beach erosion and loss of coastal access, are substantive enough that steps must be taken to deal with them.
The survey of 600 coastal professionals showed a big jump in acknowledgement and planning for climate change since the last time the poll was taken.
"Six years ago, just a handful of communities had begun to talk about climate change and had plans to address it," Susanne Moser, a researcher who worked on the survey and has studied how communities respond to climate-change impacts since the 1990s, told InsideClimate News. "This time, 93 percent of the respondents said they were on this issue. It's unbelievable the shift in attention."
Moser, who does research at Stanford University and the University of California Santa Cruz and runs her own consulting company, said many cities are in the process of gearing up for adaptive measures to deal with climate change impacts. However, few are actively doing something on the ground because of financial and other obstacles.
"I'm actually quite convinced we could do this financially," she said. "It's not all about money."
Studies have shown that for every dollar spent on disaster preparedness, cities save $4, Moser said. But with cities having to parse out declining funds for a variety of causes, the out-front cost of preparedness doesn't look like a good deal - until after the disaster hits.
In North Carolina, the state legislature appears to not only have no interest in preparing, it prefers to say there's nothing to prepare for. Last Thursday, the state Senate's environmental committee OK'd a measure, pushed by developers, that would downplay or disregard scientists' warnings of major sea-level rise. With virtually no debate, the full Senate approved the bill Tuesday on a 34-11 vote. It now goes back to the House for a vote.
Scientists estimate a 3-foot rise in sea level by 2100, driven mostly by climate change, which would wipe out 2,000 square miles of coastland in North Carolina alone. But the bill approved by the committee states that only N.C. Coastal Resource Commission can calculate how fast sea levels are rising. At one point, the bill stated only historic trends over the last century could be used in the calculation, which would project a rise of only 8 inches and the loss of far less coastal land.
Moser said North Carolina's refusal to accept scientific evidence is not going to prevent the sea level from rising.
"Reality is still out there," she said. "I'm not giving up on that."
Said Colbert last week: "Now folks, I think that is a brilliant solution. If your science gives you a result that you don't like, pass a law saying that the result is illegal. Problem solved. (E = MC Scared)"
The Achilles' Heel of Nuclear Power
Yet another climate change boogeyman is lurking.
Rising temperatures could make nuclear and fossil fuel-fired power plants harder to operate in the future, and that could mean less power will be available when it will be needed most: in summers made even hotter by global warming.
These so-called thermoelectric plants, which produce 91 percent of the electricity in the United States, may have to shut down more frequently due to a shortage of cool, fresh water to cool the plants. Generating capacity at these facilities in the United States could fall by 4 to 16 percent between 2031 and 2060, according to a study by researchers at the University of Washington and in Europe.
And, as is often the case, the cost of dealing with the increased risk of outages and alternatives will fall on consumers in the form of higher electricity rates.
The power plants that will be most affected use what is called a once-through cooling system. They divert water from rivers and lakes, use it to cool the plants, then return it to the waterways.
Dennis Lettenmaier, a professor of civil and environmental engineering at the University of Washington and one of the co-authors of the study, told InsideClimate News the problems will be twofold.
First, based on climate-model projections, the temperature of the water will be higher because of raised air temperatures, and it will be too high at times to adequately cool the plant. This already happened at the Browns Ferry Nuclear Plant in Alabama, which had to shut down briefly last summer because water in the Tennessee River wasn't cool enough.
Secondly, there may simply not be enough water to safely divert the flow and return it to the waterway.
Climate models project a greater probability of low river levels due to a more variable climate. Thermoelectric plants are already an environmental concern because of the impacts of the warm water they pump back into the fresh water systems. Lower river or lake levels would mean there would be less water available to diffuse the warmth that is returned. ¬†
Plants currently have discharge restrictions to prevent ecological damage from downstream thermal pollution. With lower water levels, the plants would be forced to shut down more often.
Periods of high water temperature or low lake and river levels are most likely to occur in the summer, when air conditioning use is high and energy demand is at its peak.
Many of the affected plants in the United States are in the Southeast, Lettenmaier said. Most were built in the 1970s and 80s and will be reaching the end of their economic life in coming decades.
Lettenmaier said the study's findings might discourage operators from applying for relicensing of these aging facilities, because of the expensive upgrades that would be required. "That could be the last nail in the coffin," he said.
The impacts of climate change could be even bigger on similar power plants in Europe, according to the study, published in the journal Nature Climate Change. Power production in European thermoelectric plants could drop by 6 to 19 percent due to increased shutdowns.
Not all power plants use the once-though cooling system. Some use cooling towers to lower the temperature of the recirculated water. These kinds of plants will also be affected by climate change, but not nearly as much, Lettenmaier said.
The authors say their long-range projections will help the electricity industry prepare for changes in the availability of cooling water and plan the necessary infrastructure changes. Potential solutions include siting future power plants near saltwater and switching to more efficient gas-fired plants.