Showing posts with label atmosphere. Show all posts
Showing posts with label atmosphere. Show all posts

Saturday, January 5, 2019

The Gathering Climate Storm and the Media Cover-up | By Dr. Andrew Glikson

“Earth is now substantially out of energy balance. The amount of solar energy that Earth absorbs exceeds the energy radiated back to space. The principal manifestations of this energy imbalance are continued global warming on decadal time scales and continued increase in ocean heat content.” (James Hansen 2018)

“The people have no voice since they have no information” …“No First World country has ever managed to eliminate so entirely from its media all objectivity – much less dissent.” (Gore Vidal)

With the exception of the few who comprehend the nature of a Faustian Bargain[1], some billionaires, captains of industry and their political and media mouthpieces are driving humanity toward self-destruction through the two biggest enterprises on Earth, the fossil fuel industry, which is devastating the Earth atmosphere, and the industrial-military machine leading toward nuclear war. The rest of the world is dragged subconsciously, induced by bread and circuses.

[ 1880 - Feb. 2016 temperature anomaly from 1951-1980, source ]
By close analogy with the tobacco denial syndrome[2], albeit with consequences affecting the entire Earth, the fossil fuel industry has been paying climate pseudoscientists to propagate fabricated untruths regarding the origins and consequences of global warming, widely disseminated by the media.

Despite irrefutable evidence for global warming, such fabrications are still quoted by pro-coal lobbies and compliant politicians, including:
  1. Denial of basic laws of physics, i.e. the blackbody radiation laws of Plank, Stefan-Boltzmann and Kirchhoff[3]
  2. Denial of direct observations and measurements in nature, in particular the sharp rises of temperatures, ice melt rates, sea level rise and extreme weather events.
  3. Denial of the global warming origin of extreme weather events, i.e. the closely monitored rise in storms, hurricanes, fires and droughts in several parts of the world.[4]
  4. Denial of the bulk of the peer-reviewed literature summed up in the IPCC reports.
  5. Denial of conclusions of the world’s premier climate research organizations (NASA, NOAA, NSIDC (National Snow and Ice Data Centre), Hadley-Met, Tindale, Potsdam, WMO (World Meteorological Organization), CSIRO, BOM and other organizations).
In view of the rapidly growing direct evidence from the increase in extreme weather events, the common tactic has changed from outright denial to a minimization of the significance and consequences of the shift in state of the climate.

READ MORE: Crimes Against the Earth

Whereas news items channeled by international news agencies regarding extreme weather events are generally reported, at least by national broadcasters, the plethora of discussion and debate programs on TV and radio stations mostly overlook the enhanced toxic effects of carbon gases[5], or relegate it behind sports and entertainment news. In most instances discussion panels focus on the inside political machinations rather than the critical issues themselves.

According to Mary Debrett[6]:
“We are now in the middle of perfect storm of miscommunication about climate change. Various factors have converged to confound rational public conversation. Public opinion polling indicates that although there is widespread acceptance of climate change resulting from human activities, the public’s preparedness to pay for action to mitigate climate change is actually declining – even as climate scientists warn of the increasing urgency for action. These results signal a serious problem in the public communication of climate change. They reflect this perfect storm – where tensions between the media, politicians and various lobby groups have made it impossible for scientists and others with appropriate expertise, to cut through.”
The major influence the media exerts on public opinion[7], and the extent to which it can be referred to as the “tail which wags the political dog”, allows it nearly as much, or more, political power as political leaders, chief bureaucrats and heads of corporation. A power accompanied with little responsibility.

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Notes

[1] To “strike a Faustian bargain” is to be willing to sacrifice anything to satisfy a limitless desire for knowledge or power. https://en.wiktionary.org/wiki/Faustian_bargain

[2] https://tobaccocontrol.bmj.com/content/12/suppl_3/iii23

[3] https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/wea.2072; https://en.wikipedia.org/wiki/Black-body_radiation

[4] https://www.nasa.gov/centers/langley/science/climate_assessment_2012.html; https://climate.nasa.gov/vital-signs/global-temperature/

[5] https://johnmenadue.com/andrew-glikson-the-abc-2018-year-roundup-and-the-defining-issue-of-our-time/

[6] https://www.latrobe.edu.au/big-fat-ideas/bold-thinking-social-conscience/the-media-on-climate-change-a-perfect-storm-of-miscommunication

[7] https://www.abc.net.au/radionational/programs/bigideas/the-role-of-media-in-public-opinion/8213158

The original source of this article is Global Research.

Andrew Glikson
by Dr Andrew Glikson
Earth and Paleo-climate science, Australian National University (ANU)

Saturday, February 25, 2017

Accelerating growth in CO₂ levels in the atmosphere

CO₂ Growth

In 2016, CO₂ levels in the atmosphere grew by 3.36 ppm (parts per million), a new record since 1959 and much higher than the previous record set in 2015.


Worryingly, above graph has a trendline added pointing at a growth rate in CO₂ levels of 6 ppm per year by 2026.

Growth in levels of CO₂ in the atmosphere is accelerating, despite reports that - for the third year in a row - carbon dioxide emissions from fossil fuels and industry (including cement production) had barely grown, as illustrated by the Global Carbon Project image below.

Why is growth in CO₂ levels in the atmosphere accelerating?

So, what makes growth in CO₂ levels in the atmosphere accelerate? As discussed in a previous post, growth in CO₂ levels in the atmosphere is accelerating due to:
  • Deforestation and Soil Degradation:
    Agricultural practices such as depleting groundwater and aquifers, plowing, mono-cultures and cutting and burning of trees to raise livestock can significantly reduce the carbon content of soils, along with soil moisture and nutrients levels.
  • Climate change and extreme weather events:
    The recent jump in global temperature appears to have severely damaged soils and vegetation. Soil carbon loss and enhanced decomposition of vegetation appear to have occurred both because of the temperature rise and the resulting extreme weather events such as heatwaves, drought, dust-storms and wildfires, and storms, hail, lightning, flooding and the associated erosion, turning parts of what was once a huge land sink into sources of CO₂ emissions.
    Moreover, extreme weather events can also lead to emissions other than CO₂ emissions, such as soot, nitrous oxide, methane and carbon monoxide, which can in turn cause a rise in the levels of ground-level ozone, thus further weakening vegetation and making plants even more vulnerable to pests and infestations.
  • Oceans may also be taking up less CO₂ than before:
    Oceans have absorbed some 40% of CO₂ emissions since the start of the industrial era. Up until recently, oceans still took up some 26% of carbon dioxide emitted by people annually. As discussed earlier, oceans are getting warmer, and warm water holds less oxygen than cold water. Furthermore, as the water warms, it tends to form a layer at the surface that does not mix well with cooler, nutrient-rich water below, depriving phytoplankton of some of the nutrients needed in order for phytoplankton to grow. Less phytoplankton in the oceans means that oceans become less able to take up carbon dioxide from the atmosphere. A study by Boyce et al. found a decrease of about 1% per year of phytoplankton in oceans globally. Sergei Petrovskii, co-author of a 2015 study, found that a rise in the water temperature of the world’s oceans of about 6°C could stop oxygen production by phytoplankton by disrupting the process of photosynthesis, adding that “About two-thirds of the planet’s total atmospheric oxygen is produced by ocean phytoplankton – and therefore cessation would result in the depletion of atmospheric oxygen on a global scale. This would likely result in the mass mortality of animals and humans.”
Sensitivity

Meanwhile, research including a 2014 study by Franks et al. concludes that the IPCC was too low in its estimates for the upcoming temperature rise locked in for current CO₂ levels. A study by Friedrich et al. updates IPCC estimates for sensitivity to CO₂ rise, concluding that temperatures could rise by as much as 7.36°C by 2100 as a result of rising CO₂ levels.

When also taking further elements than CO₂ more fully into account, we could face an even larger temperature rise, i.e. a rise of 10°C (or 18°F) by 2026 (compared to pre-industrial), as further described at the extinction page that specifies the different elements of such a rise, including a 0.5°C rise due to CO₂ emissions from 2016 to 2026. The CO₂ growth discussed in this post appears to be in line with such a rise and in line with the associated loss of carbon sinks and rising vulnerability of carbon pools.

The situation looks particularly threatening in the Arctic where many of the most vulnerable carbon pools are located, where temperatures are rising fastest and where CO₂ levels have recently risen rapidly (see image below with CO₂ readings at Barrow, Alaska).
[ click on images to enlarge ] 
Also note the recent rise in methane readings at Barrow (image below).
[ click on images to enlarge ] 
Action is needed!

The situation is dire and calls for comprehensive and effective action, as described in the Climate Plan.


Links

• Climate Plan
http://arctic-news.blogspot.com/p/climateplan.html

• Extinction
http://arctic-news.blogspot.com/p/extinction.html

• Monthly CO₂ not under 400 ppm in 2016
http://arctic-news.blogspot.com/2016/11/monthly-co-not-under-400-ppm-in-2016.html

• Oxygenating the Arctic
http://arctic-news.blogspot.com/p/oxygenating-arctic.html

• How much warming have humans caused?
http://arctic-news.blogspot.com/2016/05/how-much-warming-have-humans-caused.html

• Warning of mass extinction of species, including humans, within one decade
http://arctic-news.blogspot.com/2017/02/warning-of-mass-extinction-of-species-including-humans-within-one-decade.html

• Global phytoplankton decline over the past century, by Daniel G. Boyce, Marlon R. Lewis & Boris Worm
http://www.nature.com/nature/journal/v466/n7306/abs/nature09268.html

• Mathematical Modelling of Plankton–Oxygen Dynamics Under the Climate Change, by Yadigar Sekerci and Sergei Petrovskii
https://link.springer.com/article/10.1007%2Fs11538-015-0126-0

• Global warming disaster could suffocate life on planet Earth, research shows
http://www2.le.ac.uk/offices/press/press-releases/2015/december/global-warming-disaster-could-suffocate-life-on-planet-earth-research-shows


Tuesday, April 16, 2013

Another link between CO2 and mass extinctions of species

By Andrew Glikson, Australian National University
Andrew Glikson, earth and
paleo-climate scientist at
Australian National University

It’s long been known that massive increases in emission of CO2 from volcanoes, associated with the opening of the Atlantic Ocean in the end-Triassic Period, set off a shift in state of the climate which caused global mass extinction of species, eliminating about 34% of genera. The extinction created ecological niches which allowed the rise of dinosaurs during the Triassic, about 250-200 million years ago.

New research released in Science Express has refined the dating of this wave of volcanism. It shows marine and land species disappear from the fossil record within 20,000 to 30,000 years from the time evidence for the eruption of large magma flows appears, approximately 201 million years ago. These volcanic eruptions increased atmospheric CO2 and increased ocean acidity.

Mass extinctions caused by rapidly escalating levels of CO2 have occurred before. Global warming image from www.shutterstock.com
Mass extinctions due to rapidly escalating levels of CO2 are recorded since as long as 580 million years ago. As our anthropogenic global emissions of CO2 are rising, at a rate for which no precedence is known from the geological record with the exception of asteroid impacts, another wave of extinctions is unfolding.

Mass extinctions of species in the history of Earth include:
  • the ~580 million years-old (Ma) Acraman impact (South Australia) and Acrytarch (ancient palynomorphs) extinction and radiation 
  • Late Devonian (~374 Ma) volcanism, peak global temperatures and mass extinctions 
  • the end-Devonian impact cluster associated with mass extinction, which among others destroyed the Kimberley Fitzroy reefs (~360 Ma) 
  • the upper Permian (~267 Ma) extinction associated with a warming trend
  • the Permian-Triassic boundary volcanic and asteroid impact events (~ 251 Ma) and peak warming 
  • the End-Triassic (201 Ma) opening of the Atlantic Ocean, and massive volcanism 
  • an End-Jurassic (~145 Ma) impact cluster and opening of the Indian Ocean 
  • the Cretaceous-Tertiary boundary (K-T) (~65 Ma) impact cluster, Deccan volcanic activity and mass extinction 
  • the pre-Eocene-Oligocene boundary (~34 Ma) impact cluster and a cooling trend, followed by opening of the Drake Passage between Antarctica and South America, formation of the Antarctic ice sheet and minor extinction at ~34 Ma. 

Throughout the Phanerozoic (from 542 million years ago), major mass extinctions of species closely coincided with abrupt rises of atmospheric carbon dioxide and ocean acidity. These increases took place at rates to which many species could not adapt. These events – triggered by asteroid impacts, massive volcanic activity, eruption of methane, ocean anoxia and extreme rates of glaciation (see Figures 1 and 2) – have direct implications for the effects of the current rise of CO2.

Figure 1 – Trends in atmospheric CO2 and related glacial and interglacial periods since the Cambrian (542 million years ago), showing peaks in CO2 levels (green diamonds) associated with asteroid impacts and/or massive volcanism. CO2 data from Royer 2004 and 2006.
Figure 2 – Relations between CO2 rise rates and mean global temperature rise rates during warming periods, including the Paleocene-Eocene Thermal Maximum, early Oligocene, mid-Miocene, late Pliocene, Eemian (glacial termination), Dansgaard-Oeschger cycles, Medieval Warming Period, 1750-2012 and 1975-2012 periods.

In February 2013, CO2 levels had risen to near 396.80ppm at Mauna Loa Atmospheric Observatory, compared to 393.54ppm in February 2012. This rise – 3.26ppm per year – is at the highest rate yet recorded. Further measurements show CO2 is at near 400ppm of the atmosphere over the Arctic. At this rate the upper stability threshold of the Antarctic ice sheet, defined at about 500–600ppm CO2 would be reached later this century (although hysteresis of the ice sheets may slow down melting).

Our global carbon reserves – including coal, oil, oil shale, tar sands, gas and coal-seam gas – contain considerably more than 10,000 billion tonnes of carbon (see Figure 5). This amount of carbon, if released into the atmosphere, is capable of raising atmospheric CO2 levels to higher than 1000ppm. Such a rise in atmospheric radiative forcing will be similar to that of the Paleocene-Eocene boundary thermal maximum (PETM), which happened about 55 million years-ago (see Figures 1, 2 and 4). But the rate of rise surpasses those of this thermal maximum by about ten times.
Figure 3 – Plot of percent mass extinction of genera versus peak atmospheric CO2 levels at several stages of Earth history.
Figure 4 – The Paleocene-Eocene Thermal Maximum (PETM) represented by sediments in the Southern Ocean, central Pacific and South Atlantic oceans. The data indicate a) deposition of an organic matter-rich layer consequent on extinction of marine organisms; b) lowering of δ18O values representing an increase in temperature and c) a sharp decline in carbonate contents of sediments representing a decrease in pH and increase in acidity (Zachos et al 2008) 

The Paleocene-Eocene boundary thermal maximum event about 55 million years ago saw the release of approximately 2000 to 3000 billion tons of carbon to the atmosphere in the form of methane (CH4). It led to the extinction of about 35-50% of benthic foraminifera (see Figure 3 and 4), representing a major decline in the state of the marine ecosystem. The temperature rise and ocean acidity during this event are shown in Figures 4 and 6.

Based on the amount of carbon already emitted and which could continue to be released to the atmosphere (see Figure 5), current climate trends could be tracking toward conditions like those of the Paleocene-Eocene event. Many species may be unable to adapt to the extreme rate of current rise in greenhouse gases and temperatures. The rapid opening of the Arctic Sea ice, melting of Greenland and west Antarctic ice sheets, and rising spate of floods, heat waves, fires and other extreme weather events may signify a shift in state of the climate, crossing tipping points.
Figure 5 – CO2 emissions from fossil fuels (2.12 GtC ~ 1 ppm CO2). Estimated reserves and potentially recoverable resources.By analogy to medical science analysing blood count as diagnosis for cancer, climate science uses the greenhouse gas levels of the atmosphere, pH levels of the ocean, variations in solar insolation, aerosol concentrations, clouding states at different levels of the atmosphere, state of the continental ice sheets and sea ice, position of high pressure ridges and climate zones and many other parameters to determine trends in the climate. The results of these tests, conducted by thousands of peer-reviewed scientists world-wide, have to date been ignored, at the greatest peril to humanity and nature.

Continuing emissions contravene international laws regarding crimes against humanity and related International and Australian covenants. In the absence of an effective global mitigation effort, governments world-wide are now presiding over the demise of future generations and of nature, tracking toward one of the greatest mass extinction events nature has seen. It is time we learned from the history of planet Earth.

Figure 6: The Paleocene-Eocene boundary thermal maximum. http://www.uta.edu/faculty/awinguth/petm_research/petm_home.html

This article was earlier published at The Conversation (on March 22, 2013).