Tag Archives: climate science

‘Dodgy’ greenhouse gas data threatens Paris accord

Matt McGrath, BBC NEWS

Potent, climate-warming gases are being emitted into the atmosphere but are not being recorded in official inventories, a BBC investigation has found.

Air monitors in Switzerland have detected large quantities of one gas coming from a location in Italy.

However, the Italian submission to the UN records just a tiny amount of the substance being emitted.

Levels of some emissions from India and China are so uncertain that experts say their records are plus or minus 100%.

These flaws posed a bigger threat to the Paris climate agreement than US President Donald Trump’s intention to withdraw, researchers told BBC Radio 4’s Counting Carbon programme.

Bottom-up records: Among the key provisions of the Paris climate deal, signed by 195 countries in December 2015, is the requirement that every country, rich or poor, has to submit an inventory of its greenhouse-gas emissions every two years.

Under UN rules, most countries produce “bottom-up” records, based on how many car journeys are made or how much energy is used for heating homes and offices.

But air-sampling programmes that record actual levels of gases, such as those run by the UK and Switzerland, sometimes reveal errors and omissions.

Read more at: ‘Dodgy’ greenhouse gas data threatens Paris accord – BBC News

Filed under Climate Change & Energy

Scientists fear Trump will supress new climate report

Lisa Friedman, THE NEW YORK TIMES

Read the draft of the Climate Change Report.

The average temperature in the United States has risen rapidly and drastically since 1980, and recent decades have been the warmest of the past 1,500 years, according to a sweeping federal climate change report awaiting approval by the Trump administration.

The draft report by scientists from 13 federal agencies, which has not yet been made public, concludes that Americans are feeling the effects of climate change right now. It directly contradicts claims by President Trump and members of his cabinet who say that the human contribution to climate change is uncertain, and that the ability to predict the effects is limited.

“Evidence for a changing climate abounds, from the top of the atmosphere to the depths of the oceans,” a draft of the report states. A copy of it was obtained by The New York Times.

The authors note that thousands of studies, conducted by tens of thousands of scientists, have documented climate changes on land and in the air. “Many lines of evidence demonstrate that human activities, especially emissions of greenhouse (heat-trapping) gases, are primarily responsible for recent observed climate change,” they wrote.

The report was completed this year and is a special science section of the National Climate Assessment, which is congressionally mandated every four years. The National Academy of Sciences has signed off on the draft report, and the authors are awaiting permission from the Trump administration to release it.

Read more at: Scientists Fear Trump Will Dismiss Blunt Climate Report – The New York Times

Filed under Climate Change & Energy

Obsolete arguments against climate action

Dan Farber, LEGAL PLANET

Conservatives keep repeating the same arguments, even though the facts have changed.

There used to be some fairly plausible arguments against fighting climate change. I don’t mean crackpot theories about hoaxes or the “I’m not a scientist” hokum. Instead, the arguments I have in mind could be made with a straight face by serious people. I don’t think these arguments were ever truly persuasive, but they weren’t nuts.

You still hear a lot of these arguments today, often from conservatives claiming to take more nuanced positions on climate change. But these arguments have gone stale over time, as the facts on the ground have shifted.

Anyone who makes these arguments today just hasn’t done their homework. Here are these ghost arguments, which are living well past the time they should have gotten a decent burial.

“There’s too much uncertainty.” The IPCC’s first report 1990 expressed confidence that greenhouse gas emissions would cause global warming, but also found that warming up to that point had been within the range of normal variation. The most recent 2014 report – which is five times as long, reflecting a far larger body of research – found that warming had progressed to the point of being unmistakable, and well outside the range of natural variation: “Warming of the climate system is unequivocal, and since the 1950s, many of the observed changes are unprecedented over decades to millennia. The atmosphere and ocean have warmed, the amounts of snow and ice have diminished, and sea level has risen.”

“China won’t act.” Chinese emissions rose exponentially along with its economy. China refused to agree even in principle to any caps on emissions. So it may have been a reasonable argument that U.S. action would be futile and would give China an unfair advantage. But that argument is well past its “sell by” date. In the Paris Agreement, China agreed to peak emissions by 2030 and committed to interim actions in the meantime. Change has proceeded more rapidly than expected, due to declining prices for renewables, efforts to curb deadly air pollution from coal use, and shifts in the Chinese economy away. In January, China cancelled plans to build over a hundred coal plants. It now seems possible that Chinese emissions have already peaked or will do so no later than 2025.

“Cap-and-trade will crush the economy.” California has had an emission trading system for five years. The economy has been growing and adding jobs over the same periods. The EU and the Northeastern states have their own, less ambitious trading programs. Again, no observable economic ill-effects.

“Renewables will break the grid.”  Since they depend on the weather, solar and wind are more variable as power sources than nuclear or fossil fuels. At one time, that looked like it might be a big problem – an issue that Rick Perry seems to be trying to resurrect. But this problem is looking a lot more manageable than it used to. California utilities are required to get 33% of their power from renewables. Somehow the lights have stayed on, day and night, regardless of weather. Germany has had a huge increase in renewables without causing any decrease in grid reliability. Better grid management is much of the reason, including demand response (paying selected users to reduce power use when necessary). These techniques have their limits, and we will probably need much greater energy storage capacity at some point when fossil fuels are pushed out of the generation mix. But even without technological improvements, electric cars offer an appealing combination of low-pollution transportation and energy storage capacity.

“Renewables are unaffordable.” The high price of renewables compared to cheap goal or natural gas seemed to pose a big obstacle to addressing climate change. The gap is much smaller today, and economic parity does not seem far away and may already have been arrived. According to a report from the World Economic Forum, Just ten years ago, generating electricity through solar cost about $600 per MWh, and it cost only $100 to generate the same amount of power through coal and natural gas. But the price of renewable sources of power plunged quickly – today it only costs around $100 to generate the same amount of electricity through solar and $50 through wind. Given the economics, it’s not surprising that in countries like India, where cost is a key consideration, more renewable capacity is being added to the grid than coal. I don’t want to exaggerate the ease of moving to a zero-carbon economy. There are still formidable difficulties – but they’re not as enormous as they looked a decade or two ago.

It’s convenient to continue believing in these arguments, especially if you’re worried about the risks of dissenting from your ideological soulmates. But ultimately, it’s the road to intellectual bankruptcy.In short, folks, it’s time to wake up and smell the coffee.

Source: Obsolete Arguments Against Climate Action | Legal Planet

Filed under Climate Change & Energy