Nyheder fra klimaet

Diverse — Drokles on June 6, 2012 at 5:31 pm

Fra Digital Journal

Solar cells do not offset greenhouse gases or curb fossil fuel use in the United States according to a new environmental book, Green Illusions (June 2012, University of Nebraska Press), written by University of California - Berkeley visiting scholar Ozzie Zehner. Green Illusions explains how the solar industry has grown to become one of the leading emitters of hexafluoroethane (C2F6), nitrogen trifluoride (NF3), and sulfur hexafluoride (SF6). These three potent greenhouse gases, used by solar cell fabricators, make carbon dioxide (CO2) seem harmless.

Hexafluoroethane has a global warming potential that is 12,000 times higher than CO2, according to the Intergovernmental Panel on Climate Change (IPCC). It is 100 percent manufactured by humans, and survives 10,000 years once released into the atmosphere. Nitrogen trifluoride is 17,000 times more virulent than CO2, and SF6, the most treacherous greenhouse gas, is over 23,000 times more threatening.

The solar photovoltaic industry is one of the fastest-growing emitters of these gases, which are now measurably accumulating within the earth’s atmosphere according to the U.S. National Oceanic and Atmospheric Administration (NOAA). A NOAA study shows that atmospheric concentrations of SF6 have been rising exponentially. A paper published in the peer-reviewed journal Geophysical Research Letters documents that atmospheric NF3 levels have been rising 11 percent per year.

“If photovoltaic production grows, so will the associated side effects,” claims Zehner. “Even worse, there’s no evidence that solar cells offset fossil fuel use in the American context.” Zehner explains that alternative energy subsidies keep retail electricity costs incrementally lower, which then spurs demand. “It’s a boomerang effect,” remarks Zehner. “The harder we throw alternative energy into the electrical grid, the harder demand comes back to hit us on the head. Historically, we’ve filled that demand by building more fossil fuel plants, not fewer.”

Det var måske af interesse for vores klima- og energiminister Martin Lidegaard, der er ganske tilfreds med at kaste skattekroner efter stadigt flere solcelleanlæg.

Studier af tidligere tiders trægrænser, der ikke er at forveksle med studiet af træringe, fortæller historien om at vores interglaciale periode er gået mod stadigt koldere tider ifølge Conservative Climate Consumer

Another study, another nail in the “unprecedented” AGW coffin. New scientific research keeps refuting the claims of IPCC and chicken-little pundits. The empirical evidence is robustly overwhelming: global temperatures were warmer thousands of years ago despite low CO2 levels.

The two images above reflect the evidence of the warmer climates some six to ten thousand years ago. The image on the left reveals the history of the northern treeline in Finland and the image on the right the same for Siberia. The simple fact of a more northern treeline in both cases requires earlier periods to be considerably warmer than the current climate.

Now, a new study reveals that the northern treeline in Rocky Mountains was at a much higher altitude from six to nine thousand years ago, which confirms the extra warm climate was not just limited to the Finland/Siberia areas.

Der er også overraskende resultater fra Kina ifølge The Hockey Schtick

In another blow to the alarmist fallacy that the current warming period is ‘unprecedented’ or ‘unusual,’ a paper published today in the journal Climate of the Past finds that winter temperatures in China warmed at a rate almost three times faster over the 100 year period from 1862 to 1961 [1.89?C/century] than over the 100 years from 1901 to 2000 [0.66?C/century]. Furthermore, the reconstructed temperature anomaly at the beginning of the study period in 1736 [during the Little Ice Age!] was the about the same as in 2007.

Også Grønland har tidligere mærket varmen fortæller The Register

Recently unearthed photographs taken by Danish explorers in the 1930s show glaciers in Greenland retreating faster than they are today, according to researchers.

We’re not worried about rising sea levels. Well, we are in a seaplane.

The photos in question were taken by the seventh Thule Expedition to Greenland led by Dr Knud Rasmussen in 1932. The explorers were equipped with a seaplane, which they used to take aerial snaps of glaciers along the Arctic island’s coasts.

After the expedition returned the photographs were used to make maps and charts of the area, then placed in archives in Denmark where they lay forgotten for decades. Then, in recent years, international researchers trying to find information on the history of the Greenland glaciers stumbled across them.

Taken together the pictures show clearly that glaciers in the region were melting even faster in the 1930s than they are today, according to Professor Jason Box, who works at the Byrd Polar Research Center at Ohio State uni.

There’s much scientific interest in the Greenland ice sheet, as unlike most of the Arctic ice cap it sits on land: thus if it were to melt, serious sea level rises could occur (though the latest research says that this doesn’t appear to be on the cards).

It’s difficult to know exactly what’s happening to the Greenland ice in total and very different estimates have been produced in recent times. However Professor Box says that many glaciers along the coasts have started retreating in the past decade.

It now appears that the glaciers were retreating even faster eighty years ago: but nobody worried about it, and the ice subsequently came back again.

Conservative Climate Consumer citerer også 7 undersøgelser, der afviser sammenhængen mellem global opvarmning og ekstremt vejr

1. An Alps study “refutes the notion that anthropogenic warming is causing an increase of climate extremes and making weather more variable and extreme… Not only did the author find no change in variability, but he also detected a ”centennial oscillating structure”.”

2. A Mediterranean coastal study…” In addition,…make a point of noting that “the apparent increase in intense storms around 250 years ago lasts to about AD 1900,” whereupon “intense meteorological activity seems to return to a quiescent interval after (i.e. during the 20th century AD).” And they add that, “interestingly, the two periods of most frequent superstorm strikes in the Aigues-Mortes Gulf (AD 455 and 1700-1900) coincide with two of the coldest periods in Europe during the late Holocene…”

3. A study for the Aquitaine region…”…finding that dune formation was generally most common during cooler climatic intervals. In the most recent of these cold periods, the authors note there is voluminous historical evidence of many severe North Atlantic wind storms in which the southward spread of sea ice and polar water during that time likely created “an increased thermal gradient between 50°N and 65°N which intensified storm activity in the North Atlantic… Hence, the long view of history suggests that the global warming of the past century or so has actually led to an overall decrease in North Atlantic storminess.”

4. A study from the “from two cores of the Pierre Blanche lagoon just south of Montpellier, France found evidence in the form of “washover events” that allowed them “to identify the strongest storms in the Mediterranean area” over the past four centuries… Such a decline in the occurrence of “superstorms” in the Mediterranean area — if not their total disappearance — is a significant observation running counter to the climate-alarmist claim that global warming both intensifies storms and brings more of them.”

5. A study from Northwestern France “linked high-resolution sediment and rock properties of materials found in cores collected from the Seine estuary in northwest France to climatic conditions of the past few thousand years… they report on “four prominent centennial-scale periods of stronger storminess, occurring with a pacing of ~1500 years,” which they say are “likely to be related to the last four [of] Bond’s Holocene cold events,” the most recent of which was the Little Ice Age…”

6. A study from the macrotidal Bay of Vilaine…” while observing that “this shift most probably documents the transition from the MWP to the Little Ice Age,” which led to the “increased storminess both in the marine and continental ecosystems… concluded their study by stating that “the preservation of medieval estuarine flood deposits implies that sediment reworking by marine dynamics was considerably reduced between 880 and 1050 AD,” implying that during that considerably warmer period than most (if not all) of what followed it, “climatic conditions were probably mild enough to prevent coastal erosion in northwestern France.”

7. A study from France’s Atlantic coast…”analyzed tide-gauge, wind and atmospheric pressure data over the period 1951-… This work indicated that the number of atmospheric depressions (storms) and strong surge winds for this region, in the words of the author, “are becoming less frequent” and that “ongoing trends of climate variability show a decrease in the frequency and hence the gravity of coastal flooding” over the period of study.”

Mest interessant er måske at man har fundet en feed-back mekanisme fortæller The Hockey Schtick

A paper published today in Atmospheric Chemistry and Physics finds that clouds located in the stratosphere over the poles act to cool the stratosphere by adiabatic cooling, which is the cooling of air parcels as they rise and expand, rather than by ‘trapping heat’ below the clouds resulting in ‘radiative cooling’ of the stratosphere above. This finding contradicts a tenet of AGW theory, which predicts that infrared radiation from greenhouse gases will ‘trap heat’ to create a ‘hot spot’ in the troposphere and cooling of the stratosphere. This study finds that cooling of the stratosphere is instead due to rising air parcels rather than a decrease in radiation due to heat ‘trapped by greenhouse gases’.

Det kan man så fundere over, mens man punger ud til stigende grønne afgifter.

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