The following is a week or so’s articles on climate change.
The articles are not in any particular order but I have tried to keep actual news stories, as opposed to general prognostication and ‘could’ articles.
One week’s headlines on abrupt climate change
Climate Change in the Arctic and Model Projections (2017)
Stop hoping we can fix climate change by pulling carbon out of the air, scientists warn
Scientists are expressing increasing skepticism that we’re going to be able to get out of the climate change mess by relying on a variety of large-scale land-use and technical solutions that have been not only proposed but often relied upon in scientific calculations.
Two papers published last week debunk the idea of planting large volumes of trees to pull carbon dioxide out of the air — saying there just isn’t enough land available to pull it off — and also various other strategies for “carbon dioxide removal,” some of which also include massive tree plantings combined with burning their biomass and storing it below the ground.
Surface level methane
This is a beta from Copernicus.
Methane surface PPB 05 18 2017 The surface level pinpoints the source location better. Other levels are available on the website. And I repeat, the energy balance for methane is about 1250 ppb (Harold Hensel)
A reservoir of abiotic methane has been discovered in the Arctic Ocean. This means that there is more of the greenhouse gas trapped under the seabed than previously thought.
Methane, a highly effective greenhouse gas, is usually produced by decomposition of organic material, a complex process involving bacteria and microbes.
New findings by a team of CAGE scientists show that deep water gas hydrates, icy substances in the sediments that trap huge amounts of the methane, can be a reservoir for abiotic methane. One such reservoir was recently discovered on the ultraslow spreading Knipovich ridge, in the deep Fram Strait of the Arctic Ocean.
The study suggests that abiotic methane could supply vast systems of methane hydrate throughout the Arctic.
The results were recently published in Geology online and will be featured in the journal´s May issue.
Sea ice this spring in the Chukchi Sea, off northwest Alaska, is breaking up and melting earlier and much more extensively than is typical for May. While small areas of open water in this region during mid-May are normal, it appears to be unprecedented in the satellite era to have this much open water north of 68°N latitude (Point Hope) at this time of year.
The map above shows sea ice concentrations on May 20, 2017, in shades of blue to white, with white showing areas that are 90 to 100% ice covered, and darkest blue showing areas of essentially open water, meaning less than 10% ice covered. Purple areas are shore-fast ice, which is ice that is grounded, immobile, in the coastal shallows. This sea ice analysis combines information from a wide variety of remote sensing tools, including polar orbiting satellites and synthetic aperture radar, and in a couple of locations ground-based radar. Therefore, this analysis has much higher spatial resolution (detail) than the well-known Arctic-wide sea ice maps derived from passive microwave sensors
As is typical for mid-May, ice concentration is something of a patchwork. As overall ice coverage decreases with the arrival of summer, the remaining ice slowly melts, and it is easily moved around by winds. The feature that has Alaskans’ attention is the open water in the Chukchi Sea, off the northwest coast of the state.
For the past eight years in March and April, biologists with the U.S. Fish & Wildlife Service have flown to the ice of the Chukchi Sea to study polar bears. This spring, they saw something that had never witnessed before.
"Oh man, it was very dramatic," said Ryan Wilson, wildlife biologist with the agency's polar bear program. "It wasn't a subtle difference."
Wilson says in less than a week, the sea ice broke up and shifted quickly to the north. The breakup happened faster and earlier than scientists had seen before, forcing them to cut short their research trip.
"That last week that we were capturing, it kind of broke apart and we were flying from big pans [of ice] to big pans," Wilson said. "Actually, catching right along the ice edge... is typically another 100 or 200 miles to the south of us, most years."
Scientists are increasingly warning of the potential that a shutdown, or even significant slowdown, of the Atlantic conveyor belt could lead to abrupt climate change, a shift in Earth’s climate that can occur within as short a timeframe as a decade but persist for decades or centuries.
Scientists puzzled by slowing of Atlantic conveyor belt, warn of abrupt climate change
- Limited ocean measurements have shown that "the Atlantic conveyor belt" is far more capricious than models have previously suggested.
- From 2009 to 2010, the average strength of key ocean currents in the North Atlantic dropped by about 30 percent, causing warmer waters to remain in the tropics rather than being carried northward.
- “The consequences included an unusually harsh European winter, a strong Atlantic Basin hurricane season, and — because a strong AMOC keeps water away from land — an extreme sea level rise of nearly 13 centimeters along the North American coast north of New York City,” according to Eric Hand, author of a Science article published this month.
May 21 NASA EOSDIS captures for 2017, 2013 and 2015, May 21 selection was chosen as the earliest date comparable, extensive cloud cover forced the choosing of later dates were picked for 3 other pictures: 2016 June 12; 2014 May 27 and June 15 for 2012. Despite the much later dates sea ice was never for the worse compared to May 21 2017, broken and smashed up, is true to present days weakest formation of very thin tenuous sea ice. As the NASA clips suggests, it was very recently not always this fragile North of Nares Strait, despite a near permanent Gyre and tidal current, 2012 ice looked substantially thicker and stronger a month later. This year to year animation gives the impression of a progressively continuous sea ice deterioration. In the late 80's this ice sheet especially next to Greenland was rock steady year round with only the current breaking it up at Northern entrance of Nares. The broken up appearance of sea ice in 2017 demonstrates the total collapse of the steady but important thin sea ice shelves (3 to 5 meters). WD May 21,2017
Rising carbon dioxide is making the Earth GREENER: Extra plant growth caused by greenhouse gases could cover the USA twice
- Scientists used satellite data over the past 33 years to measure leaf cover
- Planet has got greener as plants have flourished in rising carbon dioxide
- Additional plant growth is equivalent to covering the US twice in greenery
- Rising carbon dioxide is responsible for 70 per cent of the extra greening
According to a new study from European researchers, sea levels are rising three times as quickly as they were 25 years ago, placing hundreds of millions of people living in coastal areas at risk.
From the NY TImes
The tropical Pacific Ocean is once again carrying on a will-it-or-won’t-it flirtation with an El Niño event, just a year after the demise of one of the strongest El Niños on record.
The odds right now are about even for an El Niño to develop, frustrating forecasters stuck in the middle of what is called the spring predictability barrier. During this time, model forecasts aren’t as good as seeing into the future, in part because of the very nature of the El Niño cycle.
Even as the Trump administration weighs withdrawing the United States from the Paris climate agreement, a new scientific paper has documented growing fluxes of greenhouse gases streaming into the air from the Alaskan tundra, a long-feared occurrence that could worsen climate change.
The new study, published in the Proceedings of the National Academy of Sciences, suggests that frozen northern soils — often called permafrost — are unleashing an increasing amount of carbon dioxide into the air as they thaw in summer or subsequently fail to refreeze as they once did, particularly in late fall and early winter....
The study, based on aircraft measurements of carbon dioxide and methane and tower measurements from Barrow, Alaska, found that from 2012 through 2014, the state emitted the equivalent of 220 million tons of carbon dioxide gas into the atmosphere from biological sources (the figure excludes fossil fuel burning and wildfires). That’s an amount comparable to all the emissions from the U.S. commercial sector in a single year.
The chief reason for the greater CO2 release was that as Alaska has warmed up, emissions from once frozen tundra in winter are increasing — presumably because the ground is not refreezing as quickly.
The NY Times to Antarctica to understand how changes to its vast ice sheet might affect the world
Miles of Antarctic ice are collapsing into the sea as scientists try to understand speed of change
Computer forecasts suggest parts of the frozen continent could break up rapidly by the end of this century
Computer forecasts suggest parts of the frozen continent could break up rapidly by the end of this century
The collapse of the most vulnerable parts of the ice sheet would cause the rising of the sea level, threatening some of the world's biggest coastal cities such as Miami, New York, Mumbai and Shanghai.
While the melting of the ice cap is widely known, scientists are trying to gather information about the rate at which it is occurring.
Computer forecasts suggested that if emissions continue at this rate to warm up the atmosphere, parts of Antarctica could break up rapidly, which could see the ocean rise six feet or more by the end of this century.
This would be double the maximum increase that an international climate panel projected four years ago.
A new scientific analysis finds that the Earth’s oceans are rising nearly three times as rapidly as they were throughout most of the 20th century, one of the strongest indications yet that a much feared trend of not just sea level rise, but its acceleration, is now underway.
“We have a much stronger acceleration in sea level rise than formerly thought,” said Sönke Dangendorf, a researcher with the University of Siegen in Germany who led the study along with scientists at institutions in Spain, France, Norway and the Netherlands.
Their paper, just out in the Proceedings of the National Academy of Sciences, isn’t the first to find that the rate of rising seas is itself increasing — but it finds a bigger rate of increase than in past studies. The new paper concludes that before 1990, oceans were rising at about 1.1 millimeters per year, or just 0.43 inches per decade. From 1993 through 2012, though, it finds that they rose at 3.1 millimeters per year, or 1.22 inches per decade.
- Parts of region got double amount of normal rainfall recently
- Two more storms forecast this week after weekend showers
In the past 30 days, about 40 percent of the Midwest got twice the amount of normal rainfall, with soils saturated from Arkansas to Ohio, according to MDA Weather Services. While spring showers usually benefit crops, the precipitation has come fast enough to flood some corn and rice fields and trigger quality concerns about maturing wheat and threats of crop disease.
“This is ancient carbon, thousands of years old.” It’s being released “much earlier than we thought.”
The Alaskan tundra is warming so quickly it has become a net emitter of carbon dioxide ahead of schedule, a new study finds.
Since CO2 is the primary heat-trapping greenhouse gas — and since the permafrost contains twice as much carbon as the atmosphere does today — this means a vicious cycle has begun that will speed up global warming.
“Because it’s getting warmer, there’s more CO2 coming out which means it’s going to get warmer which means there’s more CO2 coming out,” explained Harvard researcher and lead author Roisin Commane. Dr. Commane told ThinkProgress that “warming soils will emit more CO2 and this will overwhelm any CO2 uptake” due to an increase in plantlife from “CO2 fertilization and warmer temperatures.”’
One by 2040?
One by 2040?
On current trends, the Arctic will be ice-free in summer by 2040
THOSE who doubt the power of human beings to change Earth’s climate should look to the Arctic, and shiver. There is no need to pore over records of temperatures and atmospheric carbon-dioxide concentrations. The process is starkly visible in the shrinkage of the ice that covers the Arctic ocean. In the past 30 years, the minimum coverage of summer ice has fallen by half; its volume has fallen by three-quarters. On current trends, the Arctic ocean will be largely ice-free in summer by 2040
Climate-change sceptics will shrug. Some may even celebrate: an ice-free Arctic ocean promises a shortcut for shipping between the Pacific coast of Asia and the Atlantic coasts of Europe and the Americas, and the possibility of prospecting for perhaps a fifth of the planet’s undiscovered supplies of oil and natural gas. Such reactions are profoundly misguided. Never mind that the low price of oil and gas means searching for them in the Arctic is no longer worthwhile. Or that the much-vaunted sea passages are likely to carry only a trickle of trade. The right response is fear. The Arctic is not merely a bellwether of matters climatic, but an actor in them
The wheat crop weathered a deadly frost and record-breaking snowstorm, but farmers and agricultural specialists are reporting an outbreak of wheat streak mosaic virus that is pushing the limits of precedent.
The virus, which has no chemical answers, is transmitted by the wheat curl mite, which gravitates toward volunteer wheat. After an abundant wheat harvest last year due to a surge in moisture, volunteer wheat has been just as robust, and farmers who chose not to clear it out effectively gave the wheat mosaic virus an open invitation to ravage an already tested wheat crop.
The virus is universally distributed by the wheat curl mite and was described for the first time in Nebraska in 1922. The virus results in stunted growth, yellowing streaks and varied discoloration
Maps show emergence of new climates under the RCP4.5 emissions scenario for the end of the century for a standard map (upper) and population-weighted cartogram (lower). Shading indicates the signal-to-noise ratio (the darker the shading, the higher the ratio). Maps show results for the median of all the climate model simulations. Source: Frame et al. (2017)
Billions of people across the world could see climates they’ve never experienced before by the middle of the century, a new study says.
Using a measure of climate ‘familiarity,” the researchers show that the tropics in particular are likely to experience conditions that are virtually unheard of for the region in the present climate.
But keeping global temperatures rise below 2C above pre-industrial levels could help keep the climate “familiar” within this century, the researchers say. That means people alive today could see the benefits of mitigation within their lifetimes.
The Killer Seas Begin — Mass Marine Death off Chile as Ocean Acidification Begins to Take Down Florida’s Reef
NATO Lawmakers Warn Global Warming Will Trigger Food Shortages
Lawmakers from nations in the North Atlantic Treaty Organization are warning that global warming will lead to mass migration and conflict in the Middle East and Africa, another reason President Donald Trump should stay in the Paris climate deal.
Climate change will lead to “dire” food and water shortages in the region, according to a draft report presented Monday to the NATO Parliamentary Assembly.
Acting as the “ultimate threat multiplier” after decades of resource mismanagement in the region, extreme weather and rising seas would likely lead to volatile food prices and increased competition, according to the report by Osman Askin, a member of the Turkish Parliament.
High-resolution satellite image of Hurricane Katrina on August 26, 2005 from the NASA Aqua satellite.( NASA)
For the first time in its history, the World Meteorological Organization has released world records of the human toll from extreme weather events.
In a press release sent to weather.com Thursday, WMO says it is releasing world records for the highest reported historical death tolls from tropical cyclones, tornadoes, lightning and hailstorms. Previously, the official WMO Archive of Weather and Climate Extremes kept only temperature and weather records to address the impacts of specific events.
Temperatures will soar across the western United States early this week, surpassing even late-summer heat levels.