Sarah Palin says man isn’t to blame for climate change, citing the fact that some glaciers in Alaska are expanding. But an individual glacier’s growth does not disprove the existence or causes of global warming. In fact, the vast majority of glaciers in Alaska and around the world are losing ice rapidly.
Sarah Palin claims glaciers are growing, so obviously humans didn't cause climate change http://t.co/ZYPY9dYvBK pic.twitter.com/qSEOFebRt9
— Huffington Post (@HuffingtonPost) September 9, 2015
Palin, the former Alaska governor and 2008 vice presidential nominee, appeared on CNN’s “State of the Union” (at the 2:25 mark). Host Jake Tapper asked if she takes climate change seriously and Palin responded:
Sept. 6: "I take changes in the weather, the cyclical changes that the globe has undergone for—since the beginning of time, I take it seriously, but I’m not going to blame these changes in the weather on man’s footprint. Obama was up here looking at, say, the glaciers and pointing out a glacier that was receding. Well, there are other glaciers, though, that are growing up here. And he didn’t highlight that, but he used glaciers as an example."
Palin may not blame climate change on humans, but science does; we have covered before how scientists say it’s extremely likely that most of the observed temperature rise has been caused by human emissions. Her claim that some glaciers are growing in Alaska is true, but this isn’t a reason to question human-caused climate change. Regional variations in precipitation patterns may cause some glaciers to grow, but most glaciers around the world are losing ice as the climate warms.
President Obama did indeed point out a receding glacier during his trip to Alaska from Aug. 31 to Sept. 2. He visited the Exit Glacier and called it “as good of a signpost as any when it comes to the impacts of climate change.” That glacier has retreated about 1.25 miles over 200 years, according to the National Park Service. Though a single receding glacier also does not provide any proof of climate change, the president talked about the wider trend. During his speech to the GLACIER conference in Anchorage, Obama said that a recent study found Alaska’s glaciers are losing 75 billion tons of ice every year. That’s accurate.
The study in question was published in the journal Geophysical Research Letters in July. Researchers from the University of Alaska at Fairbanks, the U.S. Geological Survey and the University of Washington in Seattle measured the “mass balance” of 116 glaciers in Alaska—of 616 named and many thousands of unnamed glaciers, representing 41 percent of the total glacial area—and extrapolated the results to the rest of the state. They found that Alaska’s glaciers are losing 75 gigatons of ice every year. A gigaton is equal to a billion tons of ice; one scientist has explained a gigaton this way: “If you took the whole National Mall and covered it up with ice, to a height about four times as high as the [Washington] monument. … All the way down from the Capitol steps to the Lincoln Memorial.”
Glaciers normally grow through snow accumulation in the winter and then recede by melting in the summer. But lower levels of snow accumulation or higher temperatures will lead to an imbalance in that process and the glacier will retreat and lose mass over time.
But Palin pointed out that not all glaciers are losing ice. In a post on the opinion website IJ Review, she highlighted the Hubbard Glacier in Alaska. According to NASA, the Hubbard has indeed been advancing since measurement of the glacier began in 1895, at rates ranging from 13 meters to 36 meters per year. Here is how Leigh Sterns, a glaciologist at the University of Kansas, explained the glacier’s growth for NASA: “Hubbard’s advance is due to its large accumulation area; the glacier’s catchment basin extends far into the Saint Elias Mountains. Snow that falls in the basin either melts or flows down to the terminus, causing Hubbard to steadily grow.”
In short, regional variations and increasing snowfall thanks to climate change could cause some glaciers around the world to grow, even as global temperatures rise. In fact, the pace of the Hubbard Glacier’s advance has increased since 1984, which coincides with a period of increased precipitation rates.
Just as overall global temperatures are more relevant than what happens in individual areas, the overall trend for glaciers is more relevant, too. The global and Alaskan glacial trends are toward massive loss of ice as the world has warmed. The World Glacier Monitoring Service, which runs under the auspices of the United Nations Environment Programme, the World Meteorological Organization and other partners, reports that the latest data continue “the global trend in strong ice loss over the past few decades.” This general trend is apparent in the chart below, from the WGMS.
On CNN, Tapper pushed back at Palin, saying that “90 percent of glaciers, according to scientists, 90 percent of them are—are shrinking, are melting.” According to the National Snow and Ice Data Center, based at the University of Colorado at Boulder, that’s true for alpine glaciers, which are most susceptible to retreat: “Over 90 percent of the measured alpine glaciers in the world are retreating, in almost every major glaciated region.” The NSIDC explains that the causes are “varied,” but “the underlying primary causes are a warming climate and the effects of increased soot and dust in areas of higher agricultural and industrial activity.” Both the Exit and Hubbard glaciers are alpine, of differing types—the former is a valley glacier, with its flow confined by valley walls and the latter is a tidewater glacier, which terminates into the ocean.
According to the most recent WGMS data, only 22 of the 126 glaciers it analyzed were adding mass, while 104—about 83 percent—were losing mass.
In spite of that trend, a minority of glaciers, such as the Hubbard, will likely continue to expand even with warmer temperatures. For example, a study published in 2014 in Nature Geoscience described the stable or growing glaciers of the Karakorum region in Asia. The reason for those glaciers’ deviation from the global trend has to do with localized changes to winter precipitation—snowfall, essentially, helps the glaciers stay stable or grow. The authors concluded that “[o]ur findings suggest a meteorological mechanism for regional differences in the glacier response to climate warming.” In other words, local weather patterns play a role in how glaciers respond to climate change.
Most glaciers in Alaska and around the world are losing ice as the world warms. Palin suggested that Obama was cherry-picking his glacier to make a point, but she was guilty of that trick herself.
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Though made in large part of plastic, glass, ceramics, gold and copper, they also contain critical resources. The gallium used for LEDs and the camera flash, the tantalum in capacitors and indium that powers the display were all pulled from the ground — at a price for nature and people.
"Mining raw materials is always problematic, both with regard to human rights and ecology," said Melanie Müller, raw materials expert of the German think tank SWP. "Their production process is pretty toxic."
The gallium and indium in many phones comes from China or South Korea, the tantalum from the Democratic Republic of Congo or Rwanda. All in, such materials comprise less than ten grams of a phone's weight. But these grams finance an international mining industry that causes radioactive earth dumps, poisoned groundwater and Indigenous population displacement.
Environmental Damage: 'Nature Has Been Overexploited'
The problem is that modern technologies don't work without what are known as critical raw materials. Collectively, solar panels, drones, 3D printers and smartphone contain as many as 30 of these different elements sourced from around the globe. A prime example is lithium from Chile, which is essential in the manufacture of batteries for electric vehicles.
"No one, not even within the industry, would deny that mining lithium causes enormous environmental damage," Müller explained, in reference to the artificial lakes companies create when flushing the metal out of underground brine reservoirs. "The process uses vast amounts of water, so you end up with these huge flooded areas where the lithium settles."
This means of extraction results in the destruction and contamination of the natural water system. Unique plants and animals lose access to groundwater and watering holes. There have also been reports of freshwater becoming salinated due to extensive acidic waste water during lithium mining.
But lithium is not the only raw material that causes damage. Securing just one ton of rare earth elements produces 2,000 tons of toxic waste, and has devastated large regions of China, said Günther Hilpert, head of the Asia Research Division of the German think tank SWP.
He says companies there have adopted a process of spraying acid over the mining areas in order to separate the rare earths from other ores, and that mined areas are often abandoned after excavation.
"They are no longer viable for agricultural use," Hilpert said. "Nature has been overexploited."
China is not the only country with low environmental mining standards and poor resource governance. In Madagascar, for example, a thriving illegal gem and metal mining sector has been linked to rainforest depletion and destruction of natural lemur habitats.
States like Madagascar, Rwanda and the DRC score poorly on the Environmental Performance Index that ranks 180 countries for their effort on factors including conservation, air quality, waste management and emissions. Environmentalists are therefore particularly concerned that these countries are mining highly toxic materials like beryllium, tantalum and cobalt.
But it is not only nature that suffers from the extraction of high-demand critical raw materials.
"It is a dirty, toxic, partly radioactive industry," Hilpert said. "China, for example, has never really cared about human rights when it comes to achieving production targets."
Dirty, Toxic, Radioactive: Working in the Mining Sector
One of the most extreme examples is Baotou, a Chinese city in Inner Mongolia, where rare earth mining poisoned surrounding farms and nearby villages, causing thousands of people to leave the area.
In 2012, The Guardian described a toxic lake created in conjunction with rare earth mining as "a murky expanse of water, in which no fish or algae can survive. The shore is coated with a black crust, so thick you can walk on it. Into this huge, 10 sq km tailings pond nearby factories discharge water loaded with chemicals used to process the 17 most sought after minerals in the world."
Local residents reported health issues including aching legs, diabetes, osteoporosis and chest problems, The Guardian wrote.
South Africa has also been held up for turning a blind eye to the health impacts of mining.
"The platinum sector in South Africa has been criticized for performing very poorly on human rights — even within the raw materials sector," Müller said.
In 2012, security forces killed 34 miners who had been protesting poor working conditions and low wages at a mine owned by the British company Lonmin. What became known as the "Marikana massacre" triggered several spontaneous strikes across the country's mining sector.
Müller says miners can still face exposure to acid drainage — a frequent byproduct of platinum mining — that can cause chemical burns and severe lung damage. Though this can be prevented by a careful waste system.
Some progress was made in 2016 when the South African government announced plans to make mining companies pay $800 million (€679 million) for recycling acid mine water. But they didn't all comply. In 2020, activists sued Australian-owned mining company Mintails and the government to cover the cost of environmental cleanup.
Another massive issue around mining is water consumption. Since the extraction of critical raw materials is very water intensive, drought prone countries such as South Africa, have witnessed an increase in conflicts over supply.
For years, industry, government and the South African public debated – without a clear agreement – whether companies should get privileged access to water and how much the population may suffer from shortages.
Mining in Brazil: Replacing Nature, People, Land Rights
Beyond the direct health and environmental impact of mining toxic substances, quarrying critical raw materials destroys livelihoods, as developments in Brazil demonstrate.
"Brazil is the major worldwide niobium producer and reserves in [the state of] Minas Gerais would last more than 200 years [at the current rate of demand]," said Juliana Siqueira-Gay, environmental engineer and Ph.D. student at the University of São Paulo.
While the overall number of niobium mining requests is stagnating, the share of claims for Indigenous land has skyrocketed from 3 to 36 percent within one year. If granted, 23 percent of the Amazon forest and the homeland of 222 Indigenous groups could fall victim to deforestation in the name of mining, a study by Siqueira-Gay finds.
In early 2020, Brazilian President Jair Bolsonaro signed a bill which would allow corporations to develop areas populated by Indigenous communities in the future. The law has not yet entered into force, but "this policy could have long-lasting negative effects on Brazil's socio-biodiversity," said Siqueira-Gay.
One example are the niobium reserves in Seis Lagos, in Brazil's northeast, which could be quarried to build electrolytic capacitors for smartphones.
"They overlap the Balaio Indigenous land and it would cause major impacts in Indigenous communities by clearing forests responsible for providing food, raw materials and regulating the local climate," Siqueira-Gay explained.
She says scientific good practice guidelines offer a blueprint for sustainable mining that adheres to human rights and protects forests. Quarries in South America — and especially Brazil — funded by multilaterial banks like the International Finance Corporation of the World Bank Group have to follow these guidelines, Siqueira-Gay said.
They force companies to develop sustainable water supply, minimize acid exposure and re-vegetate mined surfaces. "First, negative impacts must be avoided, then minimized and at last compensated — not the other way around."
Reposted with permission from DW.