PLA strives for transparency

 

Declassified information outlines 'diversified employment' of military
China declassified a host of details on its military on Tuesday, a move experts suggest is a big stride by the armed forces to boost transparency and openness.
In a white paper titled "The Diversified Employment of China's Armed Forces", which was published by the State Council Information Office, the PLA disclosed the strength and formation of its ground force, air force, navy and missile arm. The structure and missions of the Armed Police Force and Chinese militia were also made public.

According to the document, the eighth of its kind issued by the Chinese government since 1998, the mobile operational units of the PLA ground force consist of 18 combined corps and several independent combined combat divisions or brigades. These units have a strength of 850,000.
The paper for the first time unveils the designations of combined corps and the military command that directs them. It also reveals that the PLA navy has 235,000 people in active service, and the air force has 398,000 servicemen and servicewomen. In addition, there is an airborne corps under the air force's control.
The PLA second artillery force, the country's core force for strategic deterrence, has an arsenal of Dongfeng (East Wind) ballistic missiles and Changjian (Long Sword) cruise missiles. It is the first time that the Chinese military has publicly mentioned the codenames of its missiles.
"This is the first time that the Chinese government has issued a white paper that focuses on one of the specific factors of its armed forces," said Senior Colonel Wen Bing, a researcher at the national defense policy research center under the PLA Academy of Military Science.
"The release of the document is of great importance for enhancing the system of white papers on national defense and expanding military transparency."
Wen said the international community has some concerns over China's increasing use of its armed forces, so the Chinese government decided to explain the diversified missions of its armed forces, such as in disaster relief, high sea escorts as well as joint drills with foreign militaries.
"(The paper's) content will help to better understand China's resolve to uphold peaceful development," he said.
Senior Colonel Hou Xiaohe, a strategy expert of the PLA National Defense University, said: "The disclosure of a lot of previously classified information, like the combined corps' designations and the strength of each military branch, is in response to the international community's attention. Moreover, the move signals that China now has the confidence of being a responsible power."
The white paper says China advocates a new security concept featuring mutual trust, mutual benefit, equality and coordination, and pursues comprehensive security, common security and cooperative security.
"China will never seek hegemony or behave in a hegemonic manner, nor will it engage in military expansion," the white paper says. However, it warns that China still faces multiple and complicated security threats and challenges.
The paper also mentions the determination of China's armed forces to protect the country's "national security interests" in outer space and cyberspace.
"The pledge is in accordance with our armed forces' new missions under new circumstances," said Senior Colonel Meng Xiangqing, who specializes in defense strategy at the PLA National Defense University. "As the strategic competition has been intensifying around the globe, the range of each country's national interests is also expanding."
He noted China has been facing diversified safety challenges and remains a major victim of cyberattacks. "Therefore we must ensure that the Internet and outer space will be used for peaceful purposes and in the interests of all people."
"China's security interests stretch from the land to the sea, to outer space and cyberspace, from territorial security to overseas interests, and from traditional areas to nontraditional fields," said Major General Chen Zhou, director of the PLA Academy of Military Science's national defense policy research center.
He made the remarks during an interview with China News Service when explaining why the paper uses two chapters to emphasize maritime and overseas interests.
"We have been witnessing a remarkable surge in issues concerning overseas resources, strategic routes on the sea and citizens living abroad, so the armed forces must strengthen their overseas operational capabilities to safeguard our country's overseas interests," he added.
Yang Yujun, spokesman for the Defense Ministry, said on Tuesday that military transparency is closely related to national security and has no universal definition, adding that no country can boast complete transparency of military affairs.
China is open and candid in its armed forces' strategic purposes and military capability, according to the spokesman.
China has established strategic consultation mechanisms with 23 countries, and has explained its defense policies, security concerns and the military's missions via various channels including senior leaders' speeches, multilateral meetings and interviews with the media, Yang said.
"It is fair to say that China has been highly transparent in its military affairs."

Lawrence Livermore scientists discover new materials to capture methane

Methane capture in zeolite SBN. Blue represents adsorption
sites, which are optimal for methane (CH4) uptake. Each site
is connected to three other sites (yellow arrow) at optimal
interaction distance. Image credit: LLNL News Release

Scientists at Lawrence Livermore National Laboratory (LLNL) and UC Berkeley and have discovered new materials to capture methane, the second highest concentration greenhouse gas emitted into the atmosphere.

Methane is a substantial driver of global climate change, contributing 30 percent of current net climate warming. Concern over methane is mounting, due to leaks associated with rapidly expanding unconventional oil and gas extraction, and the potential for large-scale release of methane from the Arctic as ice cover continues to melt and decayed material releases methane to the atmosphere. At the same time, methane is a growing source of energy, and aggressive methane mitigation is key to avoiding dangerous levels of global warming.

The research team, made up of Amitesh Maiti, Roger Aines and Josh Stolaroff of LLNL and Professor Berend Smit, researchers Jihan Kim and Li-Chiang Lin at UC Berkeley and Lawrence Berkeley National Lab, performed systematic computer simulation studies on the effectiveness of methane capture using two different materials - liquid solvents and nanoporous zeolites (porous materials commonly used as commercial adsorbents).

While the liquid solvents were not effective for methane capture, a handful of zeolites had sufficient methane sorption to be technologically promising. The research appears in the April 16 edition of the journal, Nature Communications.

Unlike carbon dioxide, the largest emitted greenhouse gas, which can be captured both physically and chemically in a variety of solvents and porous solids, methane is completely non-polar and interacts very weakly with most materials.

"Methane capture poses a challenge that can only be addressed through extensive material screening and ingenious molecular-level designs," Maiti said.

Methane is far more potent as a greenhouse gas than CO2. Researchers have found that the release of as little as 1 percent of methane from the Arctic alone could have a warming effect approaching that being produced by all of the CO2 that has been pumped into the atmosphere by human activity since the start of the Industrial Revolution.

Methane is emitted at a wide range of concentrations from a variety of sources, including natural gas systems, livestock, landfills, coal mining, manure management, wastewater treatment, rice cultivation and a few combustion processes.

The team's research focused on two different applications -- concentrating a medium-purity methane stream to a high-purity range (greater than 90 percent), as involved in purifying a low-quality natural gas; and concentrating a dilute stream (about 1 percent or lower) to the medium-purity range (greater than 5 percent), above methane's flammability limit in air.

Through an extensive study, the team found that none of the common solvents (including ionic liquids) appears to possess enough affinity toward methane to be of practical use. However, a systematic screening of around 100,000 zeolite structures uncovered a few nanoporous candidates that appear technologically promising.

Zeolites are unique structures that can be used for many different types of gas separations and storage applications because of their diverse topology from various networks of the framework atoms. In the team's simulations, one specific zeolite, dubbed SBN, captured enough medium source methane to turn it to high purity methane, which in turn could be used to generate efficient electricity.

"We used free-energy profiling and geometric analysis in these candidate zeolites to understand how the distribution and connectivity of pore structures and binding sites can lead to enhanced sorption of methane while being competitive with CO2 sorption at the same time," Maiti said.

Other zeolites, named ZON and FER, were able to concentrate dilute methane streams into moderate concentrations that could be used to treat coal-mine ventilation air.

The work at LLNL was funded by the Advanced Research Projects Agency-Energy (ARPA-E).

References

- News Release
Lawrence Livermore scientists discover new materials to capture methane
https://www.llnl.gov/news/newsreleases/2013/Apr/NR-13-04-03.html

-  New materials for methane capture from dilute and medium-concentration sources
http://www.nature.com/ncomms/journal/v4/n4/abs/ncomms2697.html

Related

- Methane sequestration in hydrates
http://arctic-news.blogspot.com/2012/06/methane-sequestration-in-hydrates.html

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).

Indo-Russian Fifth generation fighter crosses milestone

India and Russia have crossed the first milestone towards the development of the fifth generation fighter aircraft (FGFA), completing the preliminary design of the plane.

“The preliminary design contract (PDC) for the Russian-Indian fifth generation aircraft has been executed,” Russia’s Sukhoi aircraft company announced on Wednesday. 

The Hindustan Aeronautics Limited (HAL) signed the $295-million PDC contract in December 2010 with the Sukhoi company, which is responsible in Russia for developing the PAK-FA (perspective aviation complex-frontline aircraft), as the FGFA is called in Russia.

“The aircraft design has been fully developed,” Sukhoi said in a press release. “Both parties have agreed upon on the amount and division of work during the research and development (R&D) stage. A contract for the R&D is being prepared. It is to be signed this year.”Under the PDC contract Sukhoi has also trained Indian engineers and provided HAL with the data and software needed to create a single working environment. A team of HAL engineers and IAF experts has been working at Sukhoi’s design bureau in Moscow, while Russian engineers have been assigned to HAL.

Four T-50 aircraft, the Russian prototype of the fifth generation fighter, have already performed more than 200 test flights since January 2010. 

 

The customised FGFA version will have “some differences” from the Russian prototype to meet “specific requirements of the Indian Air Force,” the Sukhoi announcement said. 

Russian experts said the FGFA will differ in “mission hardware and software,” as well as weapons. India has dropped its initial plan to redesign the single-seat T-50 into a twin-seat version.

Air Chief Marshal N.A.K. Browne told reporters at Aero India-2013 that India is to receive from Russia the first prototype of the fifth-generation fighter in 2014, followed by two more in 2017 and 2018. The FGFA is expected to go into series production by 2022.This is India’s biggest-ever defence project and its largest defence deal with Russia. It is expected to cost India more than $30 billion. However, last year India scaled down its original plan to acquire 214 planes by one-third, to 144 aircraft, citing time and cost factors. Russia plans to induct 60 planes at an estimated price tag of $100 million per aircraft.

Pure White Gold Mercedes Benz:

Owned by an oil billionaire in Abu Dhabi, The car is made using 18k white gold and has stunning features such as the newly developed V10 quad turbo with 1,600 horsepower and 2800 nm of torque 0-100 km/h in less than 2 seconds, 1/4 mile in 6.89 seconds running on bio fuel.

Inmates in Brazil:

A prison in Brazil allows inmates to pedal on exercise bikes to power lights in a nearby town in exchange for reduced sentences. 

Puppy refuses to leave his dead mother's side:

A puppy stays by the remains of a dog who local residents say is its mother on Nov. 6, 2012, days after it was killed in an area burned in violence at East Pikesake ward in Kyaukphyu, Myanmar. The exact circumstances of the dog's death are unknown.