Topic: Energy and Environment

Diet Change and Climate Change

A draft set of new dietary guidelines released yesterday by the U. S. Department of Health and Human Services (HHS) and the Department of Agriculture (USDA) was backed by a 571-page scientific report from the 2015 Dietary Guideline Advisory Committee (DGAC) that was assembled by the Obama administration.

The Washington Post reports that, for the first time ever, the Dietary Guidelines took into consideration the environmental impacts of food production in recommending that Americans decrease their consumption of red meat and increase their intake of plant-based food.

This is from the DGAC’s Executive Summary (emphasis added):

The major findings regarding sustainable diets were that a diet higher in plant-based foods, such as vegetables, fruits, whole grains, legumes, nuts, and seeds, and lower in calories and animal based foods is more health promoting and is associated with less environmental impact than is the current U.S. diet. This pattern of eating can be achieved through a variety of dietary patterns, including the Healthy U.S.-style Pattern, the Healthy Mediterranean-style Pattern, and the Healthy Vegetarian Pattern. All of these dietary patterns are aligned with lower environmental impacts and provide options that can be adopted by the U.S. population. Current evidence shows that the average U.S. diet has a larger environmental impact in terms of increased greenhouse gas emissions, land use, water use, and energy use, compared to the above dietary patterns. This is because the current U.S. population intake of animal-based foods is higher and plant-based foods are lower, than proposed in these three dietary patterns. Of note is that no food groups need to be eliminated completely to improve sustainability outcomes over the current status.

Among the environmental considerations is greenhouse gas emissions, which are significant for one reason only: climate change (despite the DGAC report explicitly stating it did not take into account climate change).

This is another example of the breadth of Obama’s Climate Action Plan—although one not announced as such … yet.

In anticipation, I wanted to see just what kind of a climate change impact these dietary guidelines could potentially avert.

My calculations are admittedly rough, but you’ll see once you get to the end, that it hardly makes much of difference even if I am off my an order of magnitude.

Evidenced-based Sea Level Rise Projections Remain Low

Global Science Report is a feature from the Center for the Study of Science, where we highlight one or two important new items in the scientific literature or the popular media. For broader and more technical perspectives, consult our monthly “Current Wisdom.”

When it comes right down to it, the biggest potential threat from a warming climate is a large and rapid sea level rise. Everything else that a changing climate may bring we’ve seen before (or at least the likes of it), recovered from, and are better off for it (i.e., gained experience, learned lessons, developed new technologies, etc.). In fact, the more often extreme weather occurs, the more adaptive is our response (see for example, decreasing mortality in heat waves). So in that sense, climate change may hasten our adaptive response and reduce our overall vulnerability to it.

A large and rapid sea level rise is a bit of a different story—although perhaps not entirely so.

While we do have a large amount of infrastructure (e.g., big cities) in low-lying coastal regions, it is completely wrong to show them underwater in the future—a typical device used by climate activists. What will happen is that we will act to protect the most valued portions of that infrastructure, as shown in a recent report from leading experts (including from the U.S. Environmental Protection Agency) on sea level rise and response.

But, while targeted action will save our big cities, there is still a lot of real estate that will be lost if sea level rises a large amount in a short amount of time (say, by more than a meter [a little more than 3 feet] by the end of the 21st century).

We therefore keep a vigilant eye on sea level rise research. And what we’ve concluded is that sea level rise by the year 2100 is very likely to be quite modest, say about 15 inches—an amount that should allay concerns of a catastrophe. We’ve detailed literature in support of our conclusions here, there, and elsewhere.

This week, a new paper has come to our attention that further supports our synthesis.

Mega Drought in the Pacific Southwest?

Global Science Report is a feature from the Center for the Study of Science, where we highlight one or two important new items in the scientific literature or the popular media. For broader and more technical perspectives, consult our monthly “Current Wisdom.”

On Page 3 of Friday’s Washington Post is (yet another) lurid climate story, this time about mega-droughts of several decades that are going to pop up in the Pacific Southwest around 35 years from now. The findings are based upon the UN’s climate model suite that, according to our presentation to the American Geophysical Union, is in the process of failing, because it just isn’t warming at the rate they project. Here, for example, is a graphic from John Christy and Dick McNider of the University of Alabama-Huntsville, showing the growing disparity.

The work cited in the Post ignores this teensy-weensy little problem and, instead drives the models with the UN’s biggest scenario for future carbon dioxide emissions, something that natural gas, which emits much less carbon dioxide than coal when used for electrical generation, is in the process of burying.

But it gets worse.

Droughts in the Pacific Southwest are usually broken by the big pacific climate oscillation known as  El Niño.  They occur every four to eight years or so. So, in order to have decades of drought, there has to be decades without El Niños.

The overdriven, overheated climate models used in this study cannot simulate them with any degree of realism.

That’s why, in the Post article, study co-author Toby Ault

had a word of caution.  Weather conditions can vary, climate impacts can be mitigated, and the warnings of the study might not come to pass. A single El Niño weather pattern in the West could interrupt periods of prolonged drought.

At least younger climate scientists like assistant professor Ault are getting wiser. The fates willing, he’s going to live another 35 years, and we hope much longer. And when those pesky El Niños (along with many other potential co-conspirators) destroy the forecast of gloom and doom, he’ll be able to say that he warned that could happen, because the models his team used didn’t have a good handle on them.

You Ought to Have a Look: Global Temperatures and Climate Skeptics

You Ought to Have a Look is a feature from the Center for the Study of Science posted by Patrick J. Michaels and Paul C. (“Chip”) Knappenberger. While this section features all of the areas of interest that we are emphasizing, the prominence of the climate issue is driving a tremendous amount of web traffic. Here we post a few of the best in recent days, along with our color commentary.

Highlights from the various and sundry stories from across the web this week:

Over the weekend, a brouhaha erupted over the trustworthiness of the various compilations of the earth’s surface temperature history for the past century or so. This is a simmering cauldron that sporadically boils over with claims of pernicious data manipulation. This week’s eruption began with an article by Christopher Booker in the United Kingdom’s Telegraph headlined “Climategate, the Sequel: How We Are STILL Being Tricked with Flawed Data on Global Warming.” It went from local to global when it was featured prominently and for several days on the Drudge Report.

We immediately sought to temper those claims—in many cases, there are good reasons why the “raw” temperature observations are not the best representation of a location’s (natural) climate. These involve such issues as station moves, instrument changes, inconsistent observing times, and erroneous readings, as well as changes to the microclimate around the thermometer (e.g., fading paint, encroaching trees, spreading suburbia, etc.). To compile a reliable temperature record that best represents how the climate is changing, you need  to  mitigate as many of these confounding effects as much as possible. (Some of those effects are harder to remove than others.) Basically, the “raw” data need to be “adjusted.”

Concerns about the appropriateness of the methodology as well as the accuracy of the adjusted data is at the root of the simmering controversy.

The Real Climate Terror

The Obama Administration is sticking to its talking points claiming climate change affects us more than terrorism. It might be valuable to compare and contrast the real life affects Americans endure from both of these threats.

First, let’s take a look at climate change’s effects in the United States: Hurricane power, when measured by satellites, is near its lowest ever ebb. There’s no change in the frequency of severe tornados. The relationship between heavy snow and temperature is negative along the East Coast. Carbon dioxide and longer growing seasons are significantly increasing the world’s food supply, and there’s no relationship between global temperature and U.S. drought.

Compare this with the effects of terrorism: On September 11, 2011, terrorists took down the World Trade Center and nearly an entire side of the Pentagon, extinguishing 2,996 lives. As a result, every American’s privacy is assaulted by the government on a daily basis—and let’s not talk about what they’ve done to air travel, or worse, Iraq. We’ve managed to remain in a perpetual state of war, unleashing a wave of federal spending our great grandchildren will be repaying.

Perhaps next time President Obama skips the TSA lines to fly around the world on Air Force One (on the taxpayer dime, emitting the carbon of which he’s so scared) he should look down at Arlington National Cemetery at the tombstones left from the reaction to terrorism–it’s an excellent reminder of the real cost of government action.

(Read more about actual threat of terrorism in “Terrorizing Ourselves,” by Benjamin Friedman, Jim Harper and Christopher Prebel, and “Responsible Counterterrorism Policy,” by John Mueller and Mark Stewart.)

Spinning Global Sea Ice

NASA takes the (frozen) cake with this one.

It just released a report on global sea ice coverage that opens with the following sentence:

Sea ice increases in Antarctica do not make up for the accelerated Arctic sea ice loss of the last decades, a new NASA study finds.

NASA continued:

Furthermore, the global ice decrease has accelerated: in the first half of the record (1979-96), the sea ice loss was about 8,300 square miles (21,500 square kilometers) per year. This rate more than doubled for the second half of the period (1996 to 2013), when there was an average loss of 19,500 square miles (50,500 square kilometers) per year – an average yearly loss larger than the states of Vermont and New Hampshire combined.

Could have fooled us!

Figure 1 shows the sea ice coverage (anomalies) measured by satellite, as reported today by the University of Illinois at Urbana-Champaign’s website Cryosphere Today for the period since 1979 for the Arctic (left panel) and Antarctic (right panel). There has been an overall decline in Northern Hemisphere sea ice and a contemporaneous increase in Southern Hemisphere sea ice. It is also worth noting that the decline in Northern Hemisphere ice stopped about eight years ago, even as the within-year variability has gotten larger (perhaps because of thinning at the margins).


Figure 1. (left) Northern Hemisphere sea ice area anomalies (million square kilometers) from 1979 to present. (right) same for Southern (image source: Cryosphere Today).

Put them together and what do you get?  See Figure 2—the global sea ice history from 1979 through early 2015. The blow-up shows the last 10 years.


Figure 2. Global sea ice area anomalies (red line, million square kilometers) from 1979 to present. The insert shows the data since 2006 (image source: Cryosphere Today).

With the data available to us (and what NASA used, too), let’s check the veracity of NASA’s claims.

Is it true that increases around Antarctica don’t compensate for Arctic decreases? Nope.

The global ice anomaly (Figure 2) for the past two years has remained very close to the 30-yr (1979-2008) average.  This has happened because the increases around Antarctica have completely made up for the losses in the Arctic.

Is the loss of global sea-ice accelerating? Again, nope.

Look at the inset in Figure 2. It represents the second half of the period that NASA has offered to support its acceleration conclusion. Since 2006 (the past 9 years), global sea ice has increased.

How on earth can an extended period of increase be used as support for an accelerating decrease?!

No, Global Warming Doesn’t Lead to More Snow in Boston

Global Science Report is a feature from the Center for the Study of Science, where we highlight one or two important new items in the scientific literature or the popular media. For broader and more technical perspectives, consult our monthly “Current Wisdom.”

As the snow keeps piling up in Boston, so does the climate change nonsense. Never letting a good weather story go to waste, our nation’s scribes are in high dudgeon that global warming is causing the serial burial of Boston.

We discussed the illogic (or at least the selective reasoning) behind the global-warming-made-this-snowstorm-worse excuses forwarded during the first big nor’easter to wallop the area (back on January 27th), and now, after the third big event (with likely more to come!) the din is deafening. Just today there are major stories in USA Today and the Washington Post strongly suggesting that global warming enhances snowfall in New England.

Perhaps we can test this hypothesis, glibly hiding as a fact.

Back in the late 1990s, we were involved in a research project investigating the relationship between winter temperature and winter snowfall across Canada. Our results were published in the peer-reviewed Journal Geophysical Research back in 1999.  We weren’t investigating the meteorology of any one specific storm, but rather the climatology (i.e., the general relationship) of temperature and snowfall, looking to see if there were really places that were “too cold to snow” and whether a warming climate might result in more snowfall, or precisely what is being presented as fact today.