Tag: carbon emissions

U.S. Sugar Maple Tree Distribution Expands with Warmer Temperatures

One of the major concerns with forecast CO2-induced global warming is temperatures might rise so rapidly that many plant species will be driven to extinction, unable to migrate fast enough toward cooler regions of the planet to keep pace with the projected warming. The prospect of species demise and potential extinction have served as a rallying cry in calls for restricting CO2 emissions. But how much confidence should be placed in this climate-extinction hypothesis? Do real world data support these projections? Are plants really as fragile as model projections make them out to be? 

A new paper published in the research journal Botany investigates this topic as it pertains to sugar maple trees, and the findings do not bode well for climate alarmists. In this work, Hart et al. (2014) analyzed “the population dynamics of sugar maple (Acer saccharum Marsh.) trees through the southern portion of their range in eastern North America,” selecting this particular species for this specific task because its range “has been projected to shift significantly northward in accord with changing climatic conditions” by both Prasad et al. (2007) and Matthews et al. (2011).

The three U.S. researchers

analyzed changes in sugar maple basal area, relative frequency, relative density, relative importance values, diameter distributions, and the ratio of sapling biomass to total sugar maple biomass at three spatial positions near the southern boundary of the species’ range using forest inventory data from the USDA Forest Service’s Forest Inventory and Analysis program over a 20-year observation period (1990-2010),” during which time temperatures increased and summer precipitation declined.  

Kerry, Obama Pressuring India on Climate Change

Secretary of State John Kerry is currently in India as advance guard for President Obama’s visit later this month. The president is going there to try and get some commitment from India (or the illusion of a commitment) to reduce its emissions of dreaded greenhouse gases. Until now, India, along with China, has resisted calls for major reductions, effectively blocking any global treaty limiting fossil fuel use. The president is very keen on changing this before this December’s United Nations confab in Paris, where such a treaty is supposed to be inked. 

Kerry’s mission is to get India ready for the president. Speaking at a trade conference in the state of Gujarat, Kerry said, “Global climate change is already violently affecting communities, not just across India but around the world. It is disrupting commerce, development and economic growth. It’s costing farmers crops.”

In reality, global climate change is exerting no detectable effect on India’s main crop production. 

As shown below the jump, the rate of increase in wheat yields has been constant since records began in the mid-1950s, and the rate of increase in rice yields is actually higher in the last three decades than it was at the start of the record.

Further, if Kerry was saying that climate change is reducing crop yields around the world, that’s wrong too. The increase in global yields has also been constant for decades.

Global Warming and World Food Security

In a recent study to come out of China, Liu et al. (2014) write “food security under the changing climate is a great challenge for the world,” noting it has been stated by Porter et al. (2014) in the IPCC’s Fifth Assessment Report that “the negative impact of global climate warming on crop yield is more common than the positive impact according to the data from the past fifty years.”

That’s not true. Crop yields continue to rise, to the consternation of many, at the exact same rate that they have been rising at since the end of World War II. Even more telling, Liu et al. report studies based on historical data for the past several centuries suggest just the opposite, i.e. that “climate warming is good for crop harvests while climate cooling is bad for crop harvests in the world’s main crop production areas such as Europe (Braudel, 1992; Parker and Smith, 1997; Holopainen and Helama, 2009; Zhang et al., 2011) and China (Zhang, 1996; Ge, 2010; Su et al., 2014) in the temperate region.” They conclude “the current lengths of studies used to evaluate climate impacts on agriculture are too short to detect long-term trends.”

In making their case, the five Chinese scientists employed proxy data-based climate reconstructions that indicate that the Sui dynasty (581-618 AD) and Tang dynasty (618-907 AD) had warm climates comparable with the present, citing in this regard the study of Ge et al. (2003) that shows a strong periodicity in China temperatures. They additionally note that within this primarily warm climate regime, there were imbedded temperature variations—with cooling segments of inter-annual, multiple-decade and century-scale magnitude—which enabled them to assess crop yield responses to both heating and cooling from information provided about food availability in numerous historical documents that have been brought together in several historical compilations that deal with various aspects of China’s past, including Wang (1955), Wei et al. (1973), Li (1974), Liu (1975), Ouyang et al. (1975), Sima (1975), Dong (1985), Wang et al. (1985) and Song (2008). What did they thereby discover?

COP-Out: Political Storyboarding in Peru

The 20th annual “Conference of the Parties” to the UN’s 1992 climate treaty (“COP-20”) is in its second week in Lima, Peru and the news is the same as from pretty much every other one.

You don’t need a calendar to know when these are coming up, as the media are flooded with global warming horror stories every November. This year’s version is that West Antarctic glaciers are shedding a “Mount Everest” of ice every year. That really does raise sea level—about 2/100 of an inch per year. As we noted here, that reality probably wouldn’t have made a headline anywhere.

The meetings are also preceded by some great climate policy “breakthrough.” This year’s was the president’s announcement that China, for the first time, was committed to capping its emissions by 2030. They did no such thing; they said they “intend” to level their emissions off “around” 2030. People “intend” to do a lot of things that don’t happen.

During the first week of these two-day meetings, developing nations coalesce around the notion the developed world (read: United States) must pay them $100 billion per year in perpetuity in order for them to even think about capping their emissions. It’s happened in at least the last five COPs.

In the second week, the UN announces, dolefully, that the conference is deadlocked, usually because the developing world has chosen not to commit economic suicide. Just yesterday, India announced that it simply wasn’t going to reduce its emissions at the expense of development.

Then an American savior descends. In Bali, in 2007, it was Al Gore. In 2009, Barack Obama arrived and barged into one of the developing nation caucuses, only to be asked politely to leave. This week it will be Secretary of State John Kerry, who earned his pre-meeting bones by announcing that climate change is the greatest threat in the world.

I guess nuclear war isn’t so bad after all.

As the deadlock will continue, the UN will announce that the meeting is going to go overtime, beyond its scheduled Friday end. Sometime on the weekend—and usually just in time to get to the Sunday morning newsy shows—Secretary Kerry will announce a breakthrough, the meeting will adjourn, and everyone will go home to begin the cycle anew until next December’s COP-21 in Paris, where a historic agreement will be inked.

Actually, there was something a little different in Lima this year: Given all the travel and its relative distance from Eurasia, COP-20 set the all-time record for carbon dioxide emissions associated with these annual gabfests.

Carbon Dioxide Enrichment of Peach Trees: How Sweet It Is!

In our all-too-politically-correct world, carbon dioxide (CO2) frequently gets a bad rap, demonized for its potential and unverified effects on climate. However, if the truth be told, carbon dioxide is a magnificent molecule, essential to nearly all life on Earth. It is the primary raw material from which plants construct their tissues and grow during the process of photosynthesis. Perhaps it should come as no surprise, therefore, that plants perform this essential function ever better as atmospheric CO2 levels climb ever higher, a fact demonstrated in literally thousands of laboratory and field studies (see, for example, the Plant Growth Database of the Center for the Study of Carbon Dioxide and Global Change). And because plants are the ultimate food source for animals and humans, we are all indebted to CO2 for its role in sustaining and promoting the growth of plants everywhere.

But there are other benefits to atmospheric CO2 enrichment beyond enhancing plant growth, as illustrated in the recent study of Xi et al. (2014). Publishing in the professional journal Food Chemistry, the six-member team of Chinese horticultural and food scientists “investigated the effectiveness of CO2 enrichment for improving fruit flavor and customer acceptance of greenhouse-grown peaches.” 

The rationale for their study stems from the fact that peaches are widely cultivated in greenhouses throughout northern China. Under such controlled conditions, the trees are afforded protection from the natural environment, including damaging low temperatures and high winds. But this protection does not come without a price—plant photosynthesis can cause CO2 levels inside closed greenhouses to decrease during daylight hours to values below 200 parts per million, which values are half or less than half the CO2 concentration of normal outside air. As a result, Xi et al. state these “low CO2 levels may be a limiting factor for the productivity of fruit trees cultivated in greenhouses,” and they may negatively impact the “development of fruit flavor quality” and aroma, which is not good for those in the peach growing business! Thus, the six scientists set out to explore how enriching greenhouse air with CO2 might mitigate these potential problems.

For their experimental design, Xi et al. (2014) divided a greenhouse into two parts using a hermetic barrier wall, supplying one side with CO2-enriched air and the other with ambient air to be used as the control. The enriched side of the greenhouse was maintained at an atmospheric CO2 value of 360 ppm (approximately twice that of the control) from 12:00 to 16:00 each day during the main CO2 shortage period, while “fruit sugar, organic acids, volatile contents and consumer acceptability were investigated, focusing on the period of postharvest ripening.”

With respect to their findings, the Chinese researchers report that net photosynthesis was significantly increased in the trees growing in the CO2-enchanced portion of the greenhouse despite their receiving only a mere 4 hours of CO2 enrichment per day above those growing in the ambient or control portion of the structure. Elevated CO2 also improved fruit flavor and aroma, significantly increasing dominant sugar levels (sucrose and fructose), fruity aroma compounds (lactones), and floral scent compounds (norisoprenoids), while decreasing compounds that contribute to fruit sourness and undesirable aroma volatiles (Table 1). 

Table1. Percent difference of various peach fruit compounds from trees grown in CO2 enriched air, relative to trees grown in ambient air, as measured in fruit picked on the day of harvest and five days after harvest.  Data derived from Table 1 of Xi et al. (2014).

Table1. Percent difference of various peach fruit compounds from trees grown in CO2 enriched air, relative to trees grown in ambient air, as measured in fruit picked on the day of harvest and five days after harvest. Data derived from Table 1 of Xi et al. (2014).

As a result of their findings, the authors conclude that “CO2 enrichment can significantly improve the flavor quality of ‘Zaolupantao’ peach fruits grown in greenhouse and their consumer acceptance.” And if it can do that from a mere four hours of CO2 enrichment per day in a greenhouse, imagine what 24 hours of enrichment might promise for other fruiting plants growing out-of-doors, in natural environments, under present-day global atmospheric CO2 concentrations of 400 ppm and above? Hinting at the possibilities, Xi et al. cite the work of researchers studying other fruits, where similar CO2 benefits have been reported for tomato (Shahidul Islam et al., 1996; Zhang et al., 2014), strawberry (Wang and Bunce, 2004; Sun et al., 2012), and grapes (Bindi et al., 2001).

Yes, truth be told, atmospheric CO2 is a magnificent molecule, and those who continue to demonize it based on potential and unproven climatic effects, should wake up and smell the peaches—or they should at least eat one and taste how sweet its biological benefits can be!


References

Bindi, M., Fibbi, L. and Miglietta, F. 2001. Free air CO2 enrichment (FACE) of grapevine (Vitis vinifera L.): II. Growth and quality of grape and wine in response to elevated CO2 concentrations. European Journal of Agronomy 14: 145–155.

Shahidul Islam, M., Matsui, T. and Yoshida, Y. 1996. Effect of carbon dioxide enrichment on physico-chemical and enzymatic changes in tomato fruits at various stages of maturity. Scientia Horticulturae 65: 137–149.

Sun, P., Mantri, N., Lou, H., Hu, Y., Sun, D., Zhu, Y., Dong, T. and Lu, H. 2012. Effects of elevated CO2 and temperature on yield and fruit quality of strawberry (Fragaria x ananassa Duch.) at two levels of nitrogen application. PLoS ONE e41000.

Wang, S. Y. and Bunce, J. A. 2004. Elevated carbon dioxide affects fruit flavor in field-grown

strawberries (Fragaria x ananassa Duch). Journal of the Science of Food and Agriculture 84: 1464–1468.

Xi, W., Zhang, Q., Lu, X., Wei, C., Yu, S. and Zhou, Z. 2014. Improvement of flavor quality and consumer acceptance during postharvest ripening in greenhouse peaches by carbon dioxide enrichment. Food Chemistry 164: 219-227.

Zhang, Z.M., Liu, L.H., Zhang, M., Zhang, Y.S. and Wang, Q.M. 2014. Effect of carbon dioxide enrichment on health-promoting compounds and organoleptic properties of tomato fruits grown in greenhouse. Food Chemistry 153: 157-163.

Global Warming Not Influencing Annual Streamflow Trends in the Southeast and Mid-Atlantic United States

Climate model simulations generally predict a future with more frequent and more severe floods in response to carbon dioxide–induced global warming. Confirming such predictions with real world observations, however, has remained an elusive task.

The latest study to illustrate this point comes from the four-member research team of Anna P. Barros, Yajuan Duan, Julien Brun, and Miguel A. Medina Jr. (2014). Writing in the Journal of Hydrologic Engineering, they analyzed streamflow records at various locations throughout the southeast and mid-Atlantic United States over the past century.

In prefacing their work, the researchers note several challenges that must be overcome in order to properly assess and attribute streamflow trends to anthropogenic climate change. One key challenge pertains to “the lack of long enough observational records [that are necessary] to capture the full range of time scales of variability in hydroclimatic regimes as well as extreme events.” This is particularly true in the present case in which only about 3,000 of the 10,012 U.S. Geological Survey streamflow gauges that exist within the authors’ study region have data stretching beyond 25 years of record. In addition, there is often the added challenge of “intermittency in the spatial and temporal configuration of the observing system of stream gauges,” as different stations both enter into, and exit out of, existence over the course of the study period and within the study region.  

Another factor that must be considered are changes in land-use and land cover (LULC) that can significantly influence streamflow. This is especially apparent in regions that have undergone significant urban development, which creates impermeable surfaces and highly interconnected discharge networks that have been shown to contribute to what the authors refer to as “large flood peaks.” Nevertheless, despite the aforementioned challenges, Barros et al. proceeded to conduct various statistical analyses on streamflow data from within their region of study at various time intervals over the past century.

Among their list of findings, the authors report “an overwhelming majority of stations shows no trend” in annual peak streamflow. Quantitatively, for the period 1950–2010, 81.7% of all stations examined in this 61-year period showed no trend at the 98% confidence level, 11.4% experienced a negative trend toward decreasing streamflow, and 6.8% showed a positive trend. (See Table 1, after the jump.)

Similar trends were noticed over the shorter 31-year period of 1980–2010, albeit there is one important change that occurred: there were lower percentages of stations experiencing negative or positive trends. Thus, rather than trending toward more extreme conditions, annual peak streamflow throughout the southeastern and mid-Atlantic United States over the past 30 years has become less extreme and more representative of average conditions. Moreover, those stations exhibiting positive trends tended to be found in urban areas (affected by LULC change), while those exhibiting negative trends tended to reside downstream of reservoirs (also a LULC factor). 

Kerry and Lieberman Unveil Their Climate Bill: Such a Deal!

I see that my colleague Sallie James has already blogged on the inherent protectionism in the Senate’s long-awaited cap-and-tax bill.  A summary was leaked last night by The Hill.

Well, we now have the real “discussion draft” of  “The American Power Act” [APA], sponsored by John Kerry (D-NH) and Joe Lieberman (I-CT).  Lindsay Graham (R-SC) used to be on the earlier drafts, but excused himself to have a temper tantrum.

So, while Sallie talked about the trade aspects of the bill, I’d like to blather about the mechanics, costs, and climate effects. If you don’t want to read the excruciating details, stop here and note that it mandates the impossible, will not produce any meaningful reduction of planetary warming, and it will subsidize just about every form of power that is too inefficient to compete today.

APA reduces emissions to the same levels that were in the Waxman-Markey bill passed by the House last June 26.  Remember that one – snuck through on a Friday evening, just so no one would notice?  Well, people did, and it, not health care, started the angry townhall meetings last summer.  No accident, either, that Obama’s approval ratings immediately tanked.

Just like Waxman-Markey, APA will allow the average American the carbon dioxide emissions of the average citizen back in 1867, a mere 39 years from today.  Just like Waxman-Markey, the sponsors have absolutely no idea how to accomplish this.  Instead they wave magic wands for noncompetitive technologies like “Carbon Capture and Sequestration” (“CCS”, aka “clean coal”), solar energy and windmills, and ethanol (“renewable energy”), among many others.

Just like Waxman-Markey, no one knows the (enormous) cost.  How do you put a price on something that doesn’t exist?  We simply don’t know how to reduce emissions by 83%.  Consequently, APA is yet another scheme to make carbon-based energy so expensive that you won’t use it.

This will be popular!  At $4.00 a gallon, Americans reduced their consumption of gasoline by a whopping 4%.  Go figure out how high it has to get to drop by 83%.

Oh, I know. Plug-in hybrid cars will replace gasoline powered ones. Did I mention that the government-produced Chevrolet Volt is, at first, only going to be sold to governments and where it is warm because even the Obama Administration fears that the car will not be very popular where most of us live.  Did I mention that the electric power that charges the battery most likely comes from the combustion of a carbon-based fuel? Getting to that 83% requires getting rid of carbon emissions from power production.  Period.  In 39 years. Got a replacement handy?

Don’t trot out natural gas.  It burns to carbon dioxide and water, just like coal.  True, it’s about 55% of the carbon dioxide that comes from coal per unit energy, but we’ll also use a lot more more electricity over the next forty years.  In other words, switching to natural gas will keep adding emissions to the atmosphere.

Anyway, just for fun, I plugged the APA emissions reduction schedule into the Model for the Assessment of Greenhouse-gas Induced Climate Change (MAGICC – I am not making this up), which is what the United Nations uses to estimate the climatic effects of various greenhouse-gas scenarios.

I’ve included two charts with three scenarios. One is for 2050 and the other for 2100.  They assume that the “sensitivity” of temperature to a doubling of atmospheric carbon dioxide is 2.5°C, a number that many scientists think is too high, given the pokey greenhouse-effect warming of the planet that has occurred as we have effectively gone half way to a doubling already. The charts show prospective warming given by MAGICC.

The first scenario is “business-as-usual”, the perhaps too-optimistic way of saying a nation without APA.  The second assumes that only the US does APA, and the third assumes that each and every nation that has “obligations” under the UN’s Kyoto Protocol on global warming does the same.

As you can plainly see,  APA does nothing, even if all the Kyoto-signatories meet its impossible mandates.  The amount of warming “saved” by 2100 is 7% of the total for Business-as-Usual, or two-tenths of a degree Celsius. That amount will be barely detectable above the year-to-year normal fluctuations.  Put another way, if we believe in MAGICC, APA – if adopted by us, Europe, Canada, and the rest of the Kyotos – will reduce the prospective temperature in 2100 to what it would be in 2093.

That’s a big if.  Of course, we could go it alone. In that case, the temperature reduction would in fact be too small to measure reliably.

I’m hoping these numbers surface in the “debate” over APA.

So there you have it, the new American Power Act, a bill that doesn’t know how to achieve its mandates, has a completely unknown but astronomical cost, and doesn’t do a darned thing about global warming.  Such a deal!