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Aerial Photographs Catalogue the Life and Death of Volcanic Islands

Aerial Photographs Catalogue the Life and Death of Volcanic Islands | Geography 200 | Scoop.it

Volcanic islands can seem to appear out of nowhere, emerging from the ocean like breaching monsters of the deep. Below, Mika McKinnon explains how these odd geological formations are born, how they evolve, and how they eventually vanish back beneath the waves.


Via Seth Dixon
Elizabeth Bitgood's insight:

This article gives a good description of how volcanic islands grow and then die.  It has beautiful pictures of these types of islands.

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Matthew Richmond's curator insight, December 2, 2015 3:30 PM

Re-scooped from Professor Dixon, pretty cool story on the formation of islands in the south Pacific. A couple of them look like the island visible from the beach in Rincon, Puerto Rico where I stayed. The island is one giant rock so nobody lives there and it's a naval base for the U.S. military. This, however, is a different situation when you realize that not only do people live here, but kind of a lot of people live here.

Matt Ramsdell's curator insight, December 14, 2015 9:00 PM

What causes the death and the caldera in a volcano? One thing that happens in a deceased volcano is the center of the volcano starts to either erode or the inside finally caves in. Once this happen a caldera takes shape and the ocean starts to take over. As the waves eat away at the shores it will eventually create a island that is shaped like a "U". After this happens that island will someday retreat back into the ocean and someday form a barrier reef.

Adam Deneault's curator insight, December 14, 2015 10:52 PM

Based on general knowledge, I know that the taller a volcano is, the younger it is and the shorter it is, the older it is. The reason they start to get short is from erosion. Hot spots in the Earth's crust make small islands from molten rock. Young islands can be very dangerous, because if they are inhabited, they have the possibility of erupting, whereas an old island does not since the volcano is lnactice and eroding. Over time the inactive volcano will crumble and a caldera will take shape and after even more time, that caldera will slip under the ocean and become a reef. 

Rescooped by Elizabeth Bitgood from Geography Education
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NASA Satellites Find Freshwater Losses in Middle East

NASA Satellites Find Freshwater Losses in Middle East | Geography 200 | Scoop.it
A new study using data from a pair of gravity-measuring NASA satellites finds that large parts of the arid Middle East region lost freshwater reserves rapidly during the past decade.

 

"[This] data show an alarming rate of decrease in total water storage in the Tigris and Euphrates river basins, which currently have the second fastest rate of groundwater storage loss on Earth, after India," said Jay Famiglietti, principal investigator of the study and a hydrologist and professor at UC Irvine. "The rate was especially striking after the 2007 drought. Meanwhile, demand for freshwater continues to rise, and the region does not coordinate its water management because of different interpretations of international laws."

 

Tags: water, environment, consumption, resources, environment depend, Middle East, Iraq.


Via Seth Dixon
Elizabeth Bitgood's insight:

Water is a big issue in an arid area.  The fact that we can measure the amount of groundwater present in an area with a satellite is amazing to me.  The issue of water rights and control in this region will someday over take that of oil rights and use in my opinion.  Once people get used to free flowing water to use on demand it will cause problems politically when these sources of ground water inevitably dry up.

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Seth Dixon's curator insight, February 24, 2013 10:00 PM

This is a perfect example of geospatial technologies can lead to a better understanding of how the Earth's physical systems are changing because of human geography.  Teaching geography is about showing how these systems are interconnected.   

Rescooped by Elizabeth Bitgood from Geography Education
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Unrest at Turrialba Volcano, Costa Rica

Unrest at Turrialba Volcano, Costa Rica | Geography 200 | Scoop.it
Emissions of gas and ash indicate an increase in activity at Costa Rica’s Turrialba volcano in January 2010.

 

A new vent opened this month on Turriabla, the easternmost of Costa Rica's active volacanoes.  This false-color, near-infrared satellite image would be an effective teaching tool to discuss the importantce of geospatial technologies to monitor the Earth's surface. 


Via Seth Dixon
Elizabeth Bitgood's insight:

This article reminds us of how fragile the earth’s crust can be.  The rock can be ‘rotten’ when it is cooled prematurely due to rain, causing it to fracture more easily.

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Jessica Martel's curator insight, April 25, 2013 8:55 PM

its crazy how something so dangerous can be so pretty.

Jess Deady's curator insight, April 28, 2014 1:56 PM

Using different teaching methods and technologies is a part of every day life. Figuring out new ways to teach students about observing and identifying whats happening in a photo is highly important. This geospatial photograph can be used in many ways. It can be used to note color differences, and realize that this volcano has emissions that can be seen in the picture erupting from it.

James Hobson's curator insight, September 28, 2014 9:50 PM

(Central America topic 9)

Having a volcano that looms behind your city suddenly come back to life is about as much of a wakeup call as anybody would want. Though in this case it was determined that a major eruption was not immanent, it raises the question as to weighing the risks of living in such areas.  However, to me it seems that living at the base of Turriabla is not much more risky than living in other regions. Costa Ricans may have to deal with volcanoes, but so do those living around Mt. St. Helens, islands in the Pacific Ring of Fire, and even around Yellowstone. Aside from volcanoes, other environmental risks (floods, droughts, extreme temperatures, hurricanes, blizzards, landslides, tornadoes, wildfires, etc.) are other things just as worthy of being revered. So if you're safe from volcanoes, it's still likely you're more at risk from another form of nature's wrath.

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Floods cover more than half of Philippine capital

Floods cover more than half of Philippine capital | Geography 200 | Scoop.it

"Flooding caused by some of the Philippines' heaviest rains on record submerged more than half the capital Tuesday, turning roads into rivers and trapping tens of thousands of people in homes and shelters. The government suspended all work except rescues and disaster response for a second day."



Via Seth Dixon
Elizabeth Bitgood's insight:

The Philippines which experiences monsoon weather is imperiled by the deforestation and clogged water ways due to increased population.  This country must do something to fix these issues or more large scale floods will likely be in its future.

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Louis Mazza's curator insight, March 26, 2015 1:24 PM

For the second day in a row, the Philippines government has been forced to shut down all work, except for rescuers and disaster responders. Flooding has submerged more than half of the cities capital, Manila. Roads have turned to rivers and tens of thousands of people are trapped in homes and shelters. 7 deaths have been recorded so far. The capital holds 12 million people and more than 200 hundred evacuation centers have been opened. The monsoon that caused the floods is expected to travel north and cause havoc throughout the provinces surrounding Manila.

Lora Tortolani's curator insight, April 20, 2015 11:03 PM

The area of Minila received more rainfall in day than it typically gets in a month.  Flights were delayed and cancelled, roads were turned into rivers.  Some of the thoughts of why this is happening are because of deforestation of mountains, clogged waterways and canals where large squatter communities live, and poor urban planning

Mark Hathaway's curator insight, November 28, 2015 6:44 AM

Flash flooding is probably the least understood natural disaster in the world. People often underestimate, how dangerous a flash flooding situation can become. The Philippines and South East Asia suffer from widespread monsoons. The regions fertile farmland is a result of the widespread heavy rainfall. A darker consequence of this phenomenon is the occurrence of dangerous flash flooding conditions. This particular rain in the Philippians was strong enough to submerge more than half of the capital underwater. The government in Manila has suspended all government operations that do not pertain to response and rescue missions. There will be major economic effects from this event. The loss of private property, and infrastructure such as roads will put a dent into the local economy.

Rescooped by Elizabeth Bitgood from Geography Education
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Pink Lakes

Pink Lakes | Geography 200 | Scoop.it
Photo by Jean Paul Ferrero/Ardea/Caters News (via Exposing the Truth   Lake Hillier is a pink-coloured lake on Middle Island in Western Australia. Middle island is the largest of the islands a...

Via Seth Dixon
Elizabeth Bitgood's insight:

This beautiful lake is a phenomenon the reason for its color is still unknown but it makes a very memorable lake!

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Hector Alonzo's curator insight, December 15, 2014 11:44 PM

The pink lake, Lake Hillier,  located in Western Australia is stunning. The aerial view of the lake makes the lake seem unreal that is was is fascinating. What gives the lake its pink color is a mystery, but it may be from bacteria, but it shows how some places in the world are affected differently than others and it produces remarkable results.

Nicole Kearsch's curator insight, December 17, 2014 1:48 AM

Now this is bizarre.  A pink lake and no one is really sure as to why it is pink.  It is not on the top of my list of places to go swimming, that is for sure.  Although scientists don't seem too concerned about the safety of the lake for people but are curious as to what is causing the lake to be pink.  Thoughts on algea and bacteria levels or the amount of salt are included in the potential reasoning for the pink color.  Even on google earth you can see that the lake is in fact pink.  Even when scientists come to a conclusion as to what is causing the pink colored lake, as far as it isn't causing any environmental issues, I think that the lake should be left pink as a type of wonder of the world attraction for people to see.

Lena Minassian's curator insight, May 7, 2015 11:54 AM

This article caught my eye because I have never seen a pink lake before. This lake is on Middle Island in Western Australia. The lake is 600 meters wide but the reasoning behind the color of it is still yet to be determined. White salt rims the lake and the color may be caused from a low nutrient concentration and even just bacteria. The pictures of this lake are beautiful and there is not anything like it.