About Global Warming

What is Global warming?

In the past few years, the world has experienced devastating natural disasters on a level that hasn’t been seen for decades. There is much speculation that these especially strong phenomena are due to global climate change, brought on by Global Warming. The term ‘Global Warming’ refers to the rising temperature of the earth due to an increased amount of greenhouse gases. The scientific community as a whole has determined through all research that global warming is a problem caused by human influence. The burning of fossil fuels emits greenhouse gases such as carbon dioxide into the atmosphere. These gases trap the heat from the sun and cause the temperature of our planet to rise. This warming of the globe could potentially alter sea level, crop yield and rain fall, and could increase the intensity and frequency of natural disasters such as tornadoes, hurricanes, floods, and droughts. For more information on global warming, please visit our research page, our student submission page, or any of the links on the left side of this page. Please also feel free to download our free informational pamphlet and our Global Warming political cartoon.

Is Hawaii in Danger?
Eventually, yes. All small islands and low-lying areas will be jeopardized if Global Warming is allowed to progress. Some of the northern hawaiian atolls have already been submerged by ocean water. Waikiki, Manhattan, and New Orleans are good examples of major cities within the United States that may be at risk of flooding.

What is the Kyoto Protocol?
The Kyoto Protocol is not something that our government should have taken lightly. Under its provisions, 37 industrialized nations including Japan and several European countries have all committed themselves to cut their greenhouse gas emissions by 33%. We, however – as the leading emitter of greenhouse gases – refused to sign and abide by it, and instead President Bush offered up an alternative plan to deal with Global Warming. He proposed a plan that gives businesses incentives to reduce power plant emissions and greenhouse gas emissions voluntarily. However, this reduction is estimated to be less than 5% over ten years.

Why Didn’t the United States Sign the Kyoto Agreement?
The Bush Administration decided not to sign the Kyoto Protocol for one reason – the economy. President Bush has said on many occasions that the Kyoto Protocol sets unrealistic goals and would hurt the American economy. And so, we’ve become a country that intentionally lowers our expectations to increase our chances of meeting our goals. We’ve become a country that has made it a practice to do what’s profitable, what benefits our economy the most, rather than what’s right for the world. Most of all, we’ve become a country that seems to have more loyalty to ourselves than to the larger whole of which we should be a part – we care more about how we as a country are doing financially than we do about how our world is doing environmentally. We have alienated ourselves in the international environmental community and have become our own separate world. We as Americans are citizens of America (most of us), but we’re more than that – we’re citizens of the world – and we have a responsibility to ourselves, our children, and our planet to clean up our act and do our part to counteract Global Warming.

What is biofuel?
Biofuel is essentially slightly modified used cooking oil. It can be used in any standard diesel engine and can be obtained from many restaurants and establishments for little or no cost. It has virutally no emissions and is safe to use. For more information on biofuel, please click on our “Check Out Biodiesel!” link on the left side of our page.

What is a Carbon Footprint?
The term ‘Carbon Footprint’ refers to the extent of which an individual influences the environment by emitting carbon dioxide and other carbon emissions. It is used as a measure of individual pollution contribution. For more information on carbon footprints and how to calculate and reduce your carbon footprint, please click on our “Carbon Footprint Calculator” and “Carbon Footprint Reduction” links on the left side of our page

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Global Warming Refuge Discovered Near At-Risk Pacific Island Nation of Kiribati

Scientists predict ocean temperatures will rise in the equatorial Pacific by the end of the century, wreaking havoc on coral reef ecosystems.

But a new study shows that climate change could cause ocean currents to operate in a way that mitigates warming near a handful of islands right on the equator.

Those islands include some of the 33 coral atolls that form the nation of Kiribati. This low-lying country is at risk from sea-level rise caused by global warming.

Surprisingly, these Pacific islands within two degrees north and south of the equator may become isolated climate change refuges for corals and fish.

"The finding that there may be refuges in the tropics where local circulation features buffer the trend of rising sea surface temperature has important implications for the survival of coral reef systems," said David Garrison, program director in the National Science Foundation's (NSF) Division of Ocean Sciences, which funded the research.

Here's how it could happen, according to the study by Woods Hole Oceanographic Institution (WHOI) scientists Kristopher Karnauskas and Anne Cohen, published today in the journal Nature Climate Change.

At the equator, trade winds push a surface current from east to west.

About 100 to 200 meters below, a swift countercurrent develops, flowing in the opposite direction.

This, the Equatorial Undercurrent (EUC), is cooler and rich in nutrients. When it hits an island, like a rock in a river, water is deflected upward on an island's western flank.

This upwelling process brings cooler water and nutrients to the sunlit surface, creating localized areas where tiny marine plants and corals flourish.

On color-enhanced satellite maps showing measurements of global ocean chlorophyll levels, these productive patches of ocean stand out as bright green or red spots--for example, around the Galapagos Islands in the Eastern Pacific.

But as you gaze west, chlorophyll levels fade like a comet tail, giving scientists little reason to look closely at scattered low-lying coral atolls in that direction.

These islands are easy to overlook because they are tiny, remote, and lie at the far left edge of standard global satellite maps that place continents in the center.

Karnauskas, a climate scientist, was working with coral scientist Cohen to explore how climate change would affect central equatorial Pacific reefs.

When he changed the map view on his screen in order to view the entire tropical Pacific at once, he saw that chlorophyll concentrations jumped up again exactly at the Gilbert Islands on the equator.

Satellite maps also showed cooler sea surface temperatures on the west sides of these islands, part of Kiribati.

"I've been studying the tropical Pacific Ocean for most of my career, and I had never noticed that," he said. "It jumped out at me immediately, and I thought, 'there's probably a story there.'"

So Karnauskas and Cohen began to investigate how the EUC would affect the equatorial islands' reef ecosystems, starting with global climate models that simulate effects in a warming world.

Global-scale climate models predict that ocean temperatures will rise nearly 3 degrees Celsius (5.4 degrees Fahrenheit) in the central tropical Pacific.

Warmer waters often cause corals to bleach, a process in which they lose the tiny symbiotic algae that live in them and provide vital nutrition.

Bleaching has been a major cause of coral mortality and loss of coral reef area during the last 30 years.

Even the best global models, with their planet-scale views and lower resolution, cannot predict conditions in areas as small as these small islands, Karnauskas said.

So the scientists combined global models with a fine-scale regional model to focus on much smaller areas around minuscule islands scattered along the equator.

To accommodate the trillions of calculations needed for such small-area resolution, they used the new high-performance computer cluster at WHOI called "Scylla."

"Global models predict significant temperature increases in the central tropical Pacific over the next few decades, but in truth conditions can be highly variable across and around a coral reef island," Cohen said.

"To predict what the coral reef will experience in global climate change, we have to use high-resolution models, not global models."

The model predicts that as air temperatures rise and equatorial trade winds weaken, the Pacific surface current will also weaken by 15 percent by the end of the century.

The then-weaker surface current will impose less friction and drag on the EUC, so this deeper current will strengthen by 14 percent.

"Our model suggests that the amount of upwelling will actually increase by about 50 percent around these islands and reduce the rate of warming waters around them by about 0.7 C (1.25 F) per century," Karnauskas said.

A handful of coral atolls on the equator, some as small as 4 square kilometers (1.54 square miles) in area, may not seem like much.

But Karnauskas' and Cohen's results say that waters on the western sides of the islands will warm more slowly than at islands 2 degrees, or 138 miles, north and south of the equator that are not in the path of the EUC.

That gives the Gilbert Islands a significant advantage over neighboring reef systems.

"While the mitigating effect of a strengthened Equatorial Undercurrent will not spare corals the perhaps-inevitable warming expected for this region, the warming rate will be slower around these equatorial islands," Karnauskas said.

"This may allow corals and their symbiotic algae a better chance to adapt and survive."

If the model holds true, even if neighboring reefs are hard-hit, equatorial island coral reefs may survive to produce larvae of corals and other reef species.

Like a seed bank for the future, they might be a source of new corals and other species that could re-colonize damaged reefs.

"The globe is warming, but there are things going on underfoot that will slow that warming for certain parts of certain coral reef islands," said Cohen.

"These little islands in the middle of the ocean can counteract global trends and have a big effect on their own future," Karnauskas said, "which I think is a beautiful concept."

This article from www.sciencedaily.com

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