louisiana

When is a heat wave just a heat wave?

December 18, 2024 By EarthWise Leave a Comment

There are lots of extreme weather events of all kinds these days. But there have always been extreme weather events. Climate change results in more extreme weather but not all extreme weather should be attributed to climate change. So, how do we know if an extreme weather event is a result of the changing climate? Communities that are affected by extreme weather events need to know whether they are likely to see more such events in the future, or if they are anomalies like a “500-year storm” or such.

Researchers at North Carolina State University, the National Oceanic and Atmospheric Administration, the University of Colorado, Boulder, and Princeton University developed a routine process for evaluating extreme weather events.

The test case was an extreme heat wave that affected Texas and Louisiana in 2023. This notable heat wave lasted almost the entire summer. The scientists used a two-step process to determine whether the heat wave was an anomaly or part of a new pattern. They took historical data from the past 100 years to see how unusual 2023 was. Then they compared that data with both past and present predictive computer models. Comparing the predictive models can indicate whether climate change was a factor in the event.

In this case, a similar drought would not have been as hot 50 years earlier, which indicates that the heat wave is related to climate change and that even more intense heat waves are likely to occur in the future.

This sort of information is important for communities to prepare for future events.

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When is a Heat Wave Just a Heat Wave, and When is it Climate Change?

Photo, posted July 22, 2006, courtesy of Saturnism via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio

Storing carbon underground and abandoned wells

April 18, 2024 By EarthWise Leave a Comment

Using government support in the form of subsidies and tax credits, energy companies and others are planning to capture millions of tons of industrial carbon dioxide emissions and pipe the greenhouse gas into underground storage. It is a strategy enthusiastically supported by the fossil fuel industry because it allows them to keep burning the stuff.

There are currently 69 projects being reviewed by federal and state regulators seeking to store CO2 underground. The sorts of places where carbon dioxide can be injected are geologic zones containing porous rock formations which, in no way coincidentally, are the same places where oil and gas deposits are found. As a result, these places are studded with abandoned wells that have accumulated over the past century.

In Louisiana, there are about 120,000 abandoned wells that overlie geological zones that could store carbon dioxide. Environmental watchdog groups have identified numerous abandoned wells within a few miles of proposed storage sites.

The problem is that abandoned wells leak – even ones that have been plugged – and many haven’t been. The question is how much leakage will occur and what will be the consequences of the leakage. In Texas, pumping oilfield wastewater into abandoned wells has led to geysers of toxic water, artificial saline lakes, and earthquakes.

Underground carbon dioxide sequestering on a scale large enough to really matter will have to extend to very large areas. For example, injecting 100 million tons per year could create a pressurized zone as large as 100 miles. How large a problem this might create from abandoned wells in the zone is not at all clear but cannot be ignored.

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Companies Are Poised to Inject Millions of Tons of Carbon Underground. Will It Stay Put?

Photo, posted December 3, 2023, courtesy of Jason Woodhead via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio

Chasing The Ivory-Billed Woodpecker | Earth Wise

June 13, 2023 By EarthWise Leave a Comment

The ivory-billed woodpecker is or was the largest woodpecker in the United States. The last unassailable sighting of the bird was in 1944. Since then, there have various reports of glimpses of the bird or of hearing its distinctive sounds. But there has not been anything resembling proof that the bird still exists.

Despite this, the ivory-billed woodpecker has been legally protected under the Endangered Species Act. There has been a proposal to end that protection and formally declare the species extinct. Because of the controversy surrounding the bird, a final ruling on its status has been repeatedly delayed by the US Fish and Wildlife Service.

Very recently, a peer-reviewed study in the journal Ecology and Evolution makes the case that the ivory-billed woodpecker still exists and that it is premature to declare it extinct. The study cites visual encounters by expert observers, audio recordings, tree-damage, and rather grainy video evidence. The authors claim that there is intermittent but repeated presence of birds that at least look and behave like ivory-billed woodpeckers.

One might ask: why does it matter whether this bird is declared extinct or not? The answer is that there are limited federal funds for conservation efforts, and they should be spent on saving genuinely endangered species and habitats. The authors of the new study say that removing federal protection would be bad for any remaining ivory bills, which may be living in some swampy old-growth forests in Louisiana. Other scientists consider conservation resources expended on the ivory-billed woodpecker to be chasing a ghost.

As is the case for several other notorious objects, one really clear photograph of an ivory-billed woodpecker could solve a long-standing mystery.

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A Vanished Bird Might Live On, or Not. The Video Is Grainy

Photo, posted October 19, 2014, courtesy of James St. John via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio

Offshore Wind In The Gulf Of Mexico | Earth Wise

April 4, 2023 By EarthWise Leave a Comment

The US has a goal of deploying 30 GW of offshore wind energy capacity by 2030. This is an ambitious goal given that the current installed offshore wind capacity in the US is a total of seven turbines capable of generating just 42 megawatts of power. So, there is a long way to go in a relatively short amount of time.

Since 2021, the Bureau of Ocean Energy Management, a division of the Department of the Interior, has held three offshore wind lease auctions, which grant rights to developers to install offshore wind in specific marine areas. The first two auctions involve sites in the northeast, including areas in New York. The third auction, held last December, offered sites off the California Coast – the first US sites in the Pacific.

In February, the Department of the Interior proposed a new offshore wind lease sale in the Gulf of Mexico. It identified a 102,480-acre area off the coast of Louisiana, and two similar-sized areas offshore from Galveston, Texas.

The proposal is now in a 60-day period of seeking public comments before deciding whether to move ahead with the sale. As was the case for the other lease auctions, there would stipulations associated with accepted bids including efforts to build up domestic industry for the supply chain and labor force. There would also be requirements to establish and contribute to a fisheries compensatory mitigation fund to address any potential negative impacts to the fishing industry.

About two-thirds of offshore wind resources in the US are located in deep-water areas that will require floating platforms. A federal program called Floating Offshore Wind Shot has the goal of developing cost-effective technology for this purpose.

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Gulf of Mexico may be next up for offshore wind leases

Photo, posted May 13, 2011, courtesy of the Department of Energy and Climate Change via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio

The Ivory-Billed Woodpecker | Earth Wise

May 24, 2022 By EarthWise Leave a Comment

The ivory-billed woodpecker was the largest woodpecker in the US. They were once relatively common, stretching from the Carolinas through the southeast and across to Texas. Their numbers started to drop sharply in the 19th century because of habitat loss and overhunting. Many were taken as valuable specimens; some were even eaten by poverty-stricken people.

The last widely accepted sighting was way back in 1944. For years, the birds were listed as critically endangered with only infrequent and entirely anecdotal reports of sightings. Last year, the U.S. Fish and Wildlife Service finally declared the species extinct.

A multiyear field study by avian researchers from multiple institutions has recently reported that the ivory-billed woodpecker may in fact still exist in a remote swampy region of Louisiana.

The three-year effort to find the woodpecker involved scientists trudging through the remote site to observe birds and take audio recordings. Unmanned trail cameras taking time-lapse photos and a drone were used to capture images. Several members of the team report that they observed the birds. Some photographic images and videos appear to show ivory bills. Based on characteristic markings visible in some of the photos, the birds do appear to be the ivory bill and not, for example, the fairly common but similar looking pileated woodpecker.

The birds are scarce, live in a tough, swampy habitat, and actively avoid getting near people. They live high in trees and are very difficult to spot, much less get clear photographs of. From all indications, however, reports of the demise of the ivory-billed woodpecker may have been premature.

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Back from the dead? Elusive ivory-billed woodpecker not extinct, researchers say

Photo, posted May 3, 2008, courtesy of Michael McCarthy via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

The Changing Climate Is Changing Insurance

October 21, 2020 By EarthWise Leave a Comment

As the climate changes, wildfires get bigger and more destructive and hurricanes and powerful storms are more frequent and damaging. In places where these things are occurring, it is getting harder and more expensive for many homeowners to get insurance. The affordability of home insurance in the face of climate change has become a huge issue in many states.

In California, the number of homeowners who got non-renewal notices from their insurance companies rose by 6% between 2017 and 2018. In areas directly affected by wildfires between 2015 and 2017, that number jumped by 10%. Similar things have happened in Florida, Louisiana, Mississippi, and Texas, where hurricanes and flooding have caused extensive damage. Because of this, many homeowners have been forced to turn to bare-bone plans such as the California Fair Access to Insurance Plan, which can cost two or three times as much as normal insurance policies.

According to a 2019 survey of insurance companies, more than half of insurance regulators said that climate change was likely to have a high impact or an extremely high impact on the availability of insurance coverage and the assumptions used for underwriting. In the past, governments have been able to mandate coverage in certain areas or even provide coverage themselves in some cases. As the occurrence of climate-related damage becomes increasingly frequent, homeowners have to face up to a grim reality.

The challenges of dealing with wildfires, floods, powerful storms, and the like are significant enough for people who live in high-risk areas. Increasingly, home insurance in these places is becoming much more expensive, harder to find, and is worth less.

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As Climate Impacts Worsen, Homeowners Struggle to Find Affordable Insurance

Photo, posted September 1, 2020, courtesy of The National Guard via Flickr.

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More Plastic Pollution On The Way | Earth Wise

January 31, 2020 By EarthWise Leave a Comment

Public concern about plastic pollution has been rising. More and more of us are choosing reusable grocery bags, metal straws, and reusable water bottles. We shake our heads at images of immense plastic garbage patches in the ocean. We see reports of birds with 15% of their body weight in plastic.

While all of this is going on, companies like ExxonMobil, Shell, and Saudi Aramco are ramping up production of plastic – which is mostly made from oil, gas, and their byproducts. They are doing this as a hedge against the growing possibility that the global response to climate change will reduce demand for their fuels. Plastics are part of the category called petrochemicals, which currently account for 14% of oil use. Petrochemicals are expected to drive half of oil demand growth over the next 30 years.

The World Economic Forum predicts plastic production will double in the next 20 years. The fracking boom in the United States has turned this country into a big growth area for plastic production. Natural gas prices are low which is hurting profits at fracking operations. But fracking also unearths ethane, which is a feedstock for plastic production. So plastic is becoming a kind of subsidy for fracking.

The American petroleum industry’s hub has historically been the Gulf Coast of Texas and Louisiana as well as a stretch along the lower Mississippi River. There is a slew of new projects there. The industry is also seeking to create a new plastics corridor in Ohio, Pennsylvania, and West Virginia, where fracking wells are rich in ethane.

Society in general may be increasingly concerned about the impact of things like carbon emissions and plastic pollution, but the fossil fuel industry continues to focus entirely on growth and profits.

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The Plastics Pipeline: A Surge of New Production Is on the Way

Photo, posted January 10, 2015 , courtesy of Daniel Orth via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Forecasting A Massive Dead Zone

June 18, 2019 By EarthWise Leave a Comment

The Gulf of Mexico dead zone occurs every summer, and is considered one of the largest dead zones in the world. This cyclical event occurs where the Mississippi River empties into the Gulf of Mexico, just off the coast of Louisiana and Texas.

This annual dead zone is primarily caused by excess nutrient pollution from human activities, such as urbanization and agriculture, occurring throughout the Mississippi River watershed. Washed off the land by spring rains, these excess nutrients stimulate an overgrowth of algae once they reach the Gulf of Mexico. The algae in the Gulf eventually die, and then sink and decompose in the water. The resulting area of the ocean ends up with a condition known as hypoxia, which is an insufficient amount of oxygen to support most marine life. In hypoxic or dead zones, animals that can’t swim away will often suffocate and die.

Scientists from the National Oceanic and Atmospheric Administration estimate that this year the dead zone in the Gulf of Mexico will be approximately 8,000 square miles, which is roughly the size of Massachusetts. The research team uses U.S. Geological Survey river flow and nutrient data to make its forecast.

According to NOAA, the abnormally high amount of spring rainfall is a major factor contributing to this year’s dead zone. Last month, nitrate loads entering the Mississippi River watershed were 18% above the long-term average, and phosphorus loads were about 49% above the long-term average.

While the 2019 forecast is slightly less than the record size of more than 8,700 square miles set in 2017, it’s still much larger than the five year average size of 5,700.

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