Monday, December 12, 2016

The nowhere people

People migrating due to environmental disasters should be accorded ‘refugee’ status in international law
An increasing number of people globally are facing displacement due to droughts, famines, rising sea levels and other natural disasters caused by climate change. This class of migrants has been labelled as ‘environmental refugees’ in popular literature. According to the Internal Displacement Monitoring Centre, an international body reviewing trends of internal displacement, an estimated 24 million people are being displaced annually by natural disasters since 2008. This crisis will make almost half a billion people worldwide “environmental refugees” by the end of the century.
The UN Refugee Convention (1951) grants certain rights to people fleeing persecution because of race, religion, nationality, affiliation to a particular social group, or political opinion. The rights they are entitled to follow principles of non-discrimination, non-penalisation, and non-refoulement. However, people migrating due to environmental disasters have no such recognition of their ‘refugee’ status in international law, leaving them without any basic rights of rehabilitation and compensation. In September 2015, in the run-up to the 21st Conference of the Parties (COP 21) in Paris, New Zealand reportedly refused a man and his family asylum. Ioane Teitiota from Kiribati, who had sought it on the grounds of being an ‘environmental refugee’, lost his appeal before the New Zealand Supreme Court, which rejected the argument that he faced persecution because of climate change, since no such category is listed under the UN Refugee Convention. He was deported to his native island, which regularly witnesses environmental problems including storm surges, flooding and water contamination.
The Paris let-down
The Paris Agreement presented a unique opportunity to set the record straight by addressing the challenge of increasing environmental refugees. Before the negotiations commenced, numerous demands were made to incorporate ways to tackle climate migration in the final agreement. These included recognising the threat posed by climate change to livelihoods and human safety, and environmental refugees or migrants affected by climate change; providing technical and capacity building support to national and local initiatives tackling such displacement; and developing suitable policies to manage loss and damage by addressing climate change-induced displacement. However, the Paris Agreement falls considerably short of these expectations. While some hail this agreement for alluding to the rights of ‘migrants’ in its Preamble, it is an anaemic attempt at appreciating the gravity of this crisis. There is also little follow-up in the text of the agreement to address this problem.
The agreement, in Paragraph 50 of the Loss and Damage section, creates a task force to build upon existing work and develop recommendations for addressing climate migration. But this is meaningless for two main reasons — first, the recommendations of the task force have no binding authority; and second, no details are provided on its functions, operations, funding and other aspects. This ambiguity further erodes confidence in the realistic capability of this task force to effectively tackle climate migration.
The way forward
Almost one year after the Paris Agreement, its significance in displaying collective political will to take meaningful action against climate change cannot be undermined. However, this should not excuse its deficiencies in addressing a burgeoning population of environmental refugees.
The draft of the Paris Agreement discussed before COP 21 provided for a Climate Change Displacement Coordination Facility. This facility was intended to target organised migration and planned relocation of displaced persons, securing emergency relief, and arranging compensation for those displaced — actions more meaningful than those of the task force in the Paris Agreement. Unfortunately, this coordination facility did not make it to the final text of the agreement, but it may be worthwhile to reconsider its establishment.
While such a coordination facility can provide short-term support to relocate migrants and rehabilitate them in safer regions, a permanent solution requires an international treaty framework that recognises ‘environmental refugees’ and the obligations of nation states in accommodating them within their territories. We are already witnessing a world that is reactionary towards political refugees. Brexit and the election of Donald Trump are two events that testify to the underlying paranoia towards immigrants. Ignoring environmental refugees or their status under international law keeps them in legal limbo and endangers their survival.
This scenario can be averted by either expanding the ambit of the existing UN Refugee Convention to include climate migration, or by creating an independent treaty framework addressing the challenges of climate change-induced migration comprehensively. It is also pertinent to mention that while India, the U.S., and China have all ratified the Paris Agreement, there is little discussion on steps to be taken by the three largest emitters of greenhouse gases. The absence of such discourse is ironic given that the three countries are predicted to suffer tremendously from climate change-induced migration, resulting in large-scale displacement of their own populations. Therefore, it should be in their collective interest to lead efforts on finding an international resolution to this problem before the ensuing harm becomes irreparable.

Ameen Jauhar is a Research Fellow at Vidhi Centre for Legal Policy, New Delhi. Views are personal.

Sunday, December 4, 2016

ASTEROIDAL IMPACT ON EARTH

Some asteroids have orbits that cross the orbit of the Earth. That means that the Earth will be hit sometime. Recent studies have shown that the Earth has been hit an alarmingly large number of times in the past. One large impact is now thought to have contributed to the quick demise of the dinosaurs about 65 million years ago.

Thermonuclear warhead Effect

The largest yield of a thermonuclear warhead is around 50--100 megatons. The kinetic energy of the falling object is converted to the explosion when it hits. The 10-kilometer object produces an explosion of 6 × 107 megatons of TNT (equivalent to an earthquake of magnitude 12.4 on the Richter scale).

Hole in the atmosphere

On its way to the impact, the asteroid pushes aside the air in front of it creating a hole in the atmosphere. The atmosphere above the impact site is removed for several tens of seconds. Before the surrounding air can rush back in to fill the gap, material from the impact: vaporized asteroid, crustal material, and ocean water (if it lands in the ocean), escapes through the hole and follows a ballistic flight back down. Within two minutes after impact, about 105 cubic kilometers of ejecta (1013 tons) is lofted to about 100 kilometers.

Steam  explosions

If the asteroid hits the ocean, the surrounding water returning over the hot crater floor is vaporized, sending more water vapor into the air as well as causing huge steam explosions.

Tsunami

The oceans cover about 75% of the Earth's surface, so it is likely the asteroid will hit an ocean. The asteroid will push the water aside and hit the ocean floor to create a large crater. The water pushed aside will form a tsunami, a megatsunami.
The steam blasts from the water at the crater site rushing back over the hot crater floor will also produce tsunamis following the initial impact.

Global Firestorm

The material ejected from the impact through the hole in the atmosphere will re-enter all over the globe and heat up from the friction with the atmosphere. The chunks of material will be hot enough to produce a lot of infrared light. The heat from the glowing material will start fires around the globe.

Acid Rain

The heat from the shock wave of the entering asteroid and reprocessing of the air close to the impact produces nitric and nitrous acids over the next few months to one year.
Atmospheric NO2 is converted to nitric and nitrous acids when it is mixed with water.These are really nasty acids. They will wash out of the air when it rains---a worldwide deluge of acid rain with damaging effects:
1.     destruction or damage of foliage;
2.     great amounts of weathering of continental rocks;
3.     the upper ocean organisms are killed. These organisms are responsible for locking up carbon dioxide in their shells (calcium carbonate) that would eventually become limestone. However, the shells will dissolve in the acid water. That along with the "impact winter" kills off about 90% of all marine nanoplankton species..
4.     The ozone layer is destroyed by O3 reacting with NO. The amount of ultraviolet light hitting the surface increases, killing small organisms and plants (key parts of the food chain). The NO2 causes respiratory damage in larger animals. Harmful elements like Beryllium, Mercury, Thallium, etc. are let loose.

Temperature Effects (impact winter)

All of the dust in the air from the impact and soot from the fires will block the Sun. The dramatic decrease of sunlight reaching the surface produces a drastic short-term global reduction in temperature, called impact winter. Plant photosynthesis stops and the food chain collapses.
The cooling is followed by a much more prolonged period of increased temperature due to a large increase in the greenhouse effect. The greenhouse effect is increased because of the increase of the carbon dioxide and water vapour in the air. The carbon dioxide level rises because the plants are burned and most of the plankton are wiped out. Also, water vapor in the air from the impact stays aloft for a while. The temperatures are too warm for comfort for a while.

Beneficial Asteroid Impacts

The near-Earth asteroids are the most worrisome ones for possible impacts but they could also be potentially very beneficial to Earth if we could mine them for rare metals and use the asteroids as convenient stepping stones to manned exploration of the solar system, especially traveling to Mars.
The near-Earth asteroids are relatively abundant in heavy metals like iron and nickel and the platinum-group metals (platinum, palladium, rhodium, ruthenium, osmium, and iridium) used in modern technology.
In fact, all of the heavy metals in the Earth's crust came from asteroid impacts after the Earth differentiated
The water from the asteroids could also be broken down into oxygen and hydrogen to be used as rocket fuel.

Monday, November 7, 2016

Slow slip events can trigger earthquakes

One permanent GPS station at the center of the 
Guerrero seismic gap, overlooking Acapulco bay 
(ACAP). Credit: NathalieCotte / CNRS.
In subduction zones, where one tectonic plate slides beneath another, slow, imperceptible slip, known as ‘slow earthquakes’ or ‘slow slip events’, can trigger powerful quakes a little further away. This has just been shown by researchers from CNRS, Université Grenoble Alpes and IRD, in collaboration with colleagues at the National Autonomous University of Mexico. Their paper is published in the journal Nature Geoscience on 3 october 2016.
Discovered twenty years ago, slow earthquakes are imperceptible slip events that last several weeks or months, do not generate seismic waves and cause no damage. However, they can release as much energy as a magnitude 7.5 earthquake. Understanding such slow slip events and their relationship to ordinary earthquakes is therefore of fundamental importance in better assessing seismic risk. Now, researchers have for the first time shown that a slow slip event can trigger a conventional earthquake. Researchers at the Institut des Sciences de la Terre (CNRS/Université Grenoble Alpes/IRD/Université Savoie Mont Blanc/IFSTTAR), together with colleagues from the National Autonomous University of Mexico, have shown that the magnitude 7.3 quake that struck Papanoa on 18 April 2014 was caused by a slow slip event that had begun two months earlier in the region of Acapulco in the Mexican state of Guerrero.
The geophysicists who made the discovery have been working for many years in this coastal region, where the oceanic Cocos plate slides beneath the North American plate. This phenomenon, known as subduction, is usually accompanied by earthquakes, since rather than sliding past each other seamlessly, the two plates deform and build up energy which is then released, causing the quakes. However, the area under study has not experienced any major quakes since 1912, and is thus known as a ‘seismic gap’. In addition, the installation of permanent GPS stations from 1997 onwards made it possible to detect slow earthquakes: although the Cocos and North American plates are converging at a speed of 5-6 cm/yr, every four years the gap zone experiences six-month-long periods when slip occurs in the opposite direction, with displacements reaching 15 cm.
By studying the GPS data, the researchers showed that, in the Guerrero seismic gap, slow slip events release part of the accumulated strain, making a major earthquake less likely. However, the slow slip event initiated in February 2014 transferred strain to a neighboring, seismogenic region, triggering a magnitude 7.3 earthquake on 18 April 2014 near the town of Papanoa.
This study enhances understanding of the relationship between slow slip events and conventional earthquakes in a subduction zone. The research has major societal implications, since around 20 million people would be directly affected by the devastating impact of a major earthquake on Mexico’s Pacific seaboard. The study shows that there is a greater risk of earthquakes during slow slip episodes. More generally, it highlights the importance of studying deformation signals in the days and weeks preceding major quakes. Consolidating networks of permanent GPS stations, as well as developing GPS networks on the seabed in the vicinity of areas where earthquakes initiate, will in the future make for increasingly accurate detection of the characteristics of slow slip events that may precede ordinary quakes.

Monday, October 10, 2016

GEOGRAPHY IN ACTION

GEOGRAPHY GLAMOURISED


An endeavor of World’s and India’s most prominent geographers, working in unison with the best of youthful minds, to solve all your problems related to the subject, to serve you in any manner that you think and to make you successful.

Members

1.     Dr R. B. Singh, Vice President, International Geographical Union

2.     Dr R. B. P. Singh, Vice Chancellor Nalanda University

3.     Dr K. K. Maltiyar, Patna University

4.     Dr B. W Pandey, HOD Delhi School of Economics

5.     Dr Andrea Hepburn, Paris University

6.     Kumar Vivek, Civil Services Qualified

7.     Vedant Ojha, Civil Services Qualified


------------------------------------------------------------------------------------------------------------------------------------