Sea Otters: Global Warming Warriors

Figure 1 from www.otterproject.org

sea_otter_raft

What do sea otters have to do with global warming? The furry, aquatic mammals help to counteract global warming through their position in the kelp forest food web.

Figure 2 from http://kelpforestwebsite.weebly.com/food-chain.html

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Figure 2 shows the kelp forest food web. In the kelp forest food web, which consists of a vast range of organisms such as fish, crabs, urchins, sea otters, and plankton, sea otters are a keystone species. This means that a great number of other species in the food web (even the ecosystem itself) depend on the existence of sea otters for their survival and would not be able to live in the ecosystem were it not for sea otters. As can be seen in the food web, sea otters feed primary on sea urchins, which feed primarily on the kelp that grows in kelp forests. This means that kelp populations depend largely on sea otter populations. When sea otter populations are high, kelp forests are allowed to flourish because the sea otters are eating the sea urchins which feed on the kelp forests. Because all the species in this ecosystem depend on kelp for their survival, sea otters are a keystone species because they consume the predators that destroy kelp forests.

Kelp forests have other benefits besides providing food and residence to aquatic organisms. Kelp photosynthesizes, which means it absorbs carbon dioxide and produces oxygen, meaning that kelp reduces carbon dioxide concentrations. Because of the vibrations of its molecular structure, carbon dioxide retains heat from solar energy within the Earth’s atmosphere, thus causing temperatures within the Earth’s atmosphere to rise and global warming to occur. From this, we can conclude that kelp reduces global warming because it absorbs carbon dioxide from the air or water, which means that less heat is retained within the Earth’s atmosphere.

Knowing that kelp reduces global warming, we also know that sea otters fight global warming. Sea otters are essentially protectors of the kelp forest; keeping the populations of sea urchins, which eat the kelp in the kelp forests, stabilized and low.

Your Order of Fish & Chips is Going Extinct

Open nearly any diner or local restaurant menu in New England and you’ll see fish and chips as a popular option. The fish in fish and chips is North Atlantic cod. So many people in New England and around the country enjoy fish and chips, but few people know the impact global warming and overfishing are having on New England’s cod population.

Global warming, as we know, is caused by an excess of carbon dioxide in the atmosphere. A “side effect” of global warming that’s often referenced is rising ocean levels; however, it might not be clear that the rising ocean levels stem from the ocean becoming warmer. The ocean is naturally resistant to temperature changes because the hydrogen bonds in water form very stable bonds, so a large amount of heat energy is required to break them apart. This means that water can absorb a large amount of heat energy before its temperature rises. The rising temperature of the ocean illustrates how drastic global warming has become.

codfish

Since the ocean’s temperature is normally very stable, aquatic species are largely accustomed to a specific temperature within their habitat and do not respond well to change. Specifically, the North Atlantic cod has been shown to have difficulty adapting to the warmer water. Cod generally migrate late in the spring and early in the fall; however, with warmer water, that migration pattern could shift to much earlier in the spring and much later in the fall to avoid the warm waters. Cod could also move permanently farther north, or even stop migrating if there is no sea ice left at all. Some populations, particularly those farther south such as in North Carolina and off the coast of southern New England, would become entirely extinct by 2100 if the ocean temperature projections for that time are true.

Not only do New Englanders love to eat cod, but cod fishing is also a massive industry across New England and the North Atlantic. In the mid-1990s, there was a massive drop off in cod population due to overfishing. Since the population was so endangered that the New England Fishery Management Council said they were headed “seemingly inexorably, to oblivion.” In January of 2013, Congress passed regulations on cod quotas in the Northeast: cuts as much as 80% for the next three years off the coast of Maine. While this will hopefully help to raise the population of cod in the North Atlantic, it hurts the local economy. Fishery is a massive industry in New England, and such a drastic cut to an already declining population and struggling industry means that life will become even more difficult to fishermen relying on the next catch. Also, the warming waters might mean that cod populations will not increase to their former abundance even with highly managed fishing quotas.

cod

Scientists know that the declining population of cod in the North Atlantic is due to both overfishing and climate change. However, they are not yet sure what the best course is to fix it. Although fishing quotas have been imposed, those also injure the local economy and make it difficult to justify continued cuts on quotas. Additionally, cod is only an indicator for other fisheries across the globe. If all species need to move farther north to avoid warmer waters, what will live in the southern waters? Northern waters do not provide the coral reefs that southern waters do, so a multitude of fish populations that rely on coral reefs could become extinct. All of these issues are just as important as the impacts of global warming on land. The ocean takes up so much of our Earth’s surface, and we depend so deeply on the ocean, from water supply, food, transportation, recreation, and industry. I think we need to pay a lot more attention to what’s happening everywhere in the ocean, from the sea caps to the coral reefs, and including the smaller indicators, like cod, that show us what’s happening in a wider scale.

Politics and Global Warming in America

We all look to our political figures and government to help solve the many problems that consume the United States. We look to our government in times of war, we look to our government to help keep peaceful relations with other countries, we even turn to our government to make decisions on gay marriage. Yet, many of our political figures are in denial about one of the biggest problems not only the United States faces, but that the world faces as well. This problem is global warming.

Global warming has become a serious threat to the health and way of living for many people in the world. According to Nasa, Earth’s global temperature has increased by 1.4 degrees Fahrenheit since 1880.  That number does not seem that significant, but in reality it is. Many animals have become extinct or will become extinct in the next couple of decades due to Earth becoming uninhabitable for many organisms. For example, the polar bears in Antarctica are going to have a hard time finding a place to live because all the ice that they currently live on is melting away. If they are unable to find a new home or adapt to the changes, they could become extinct. Global warming is a phenomenon that is caused by many factors, but mainly the increase in GreenHouse Gases, especially CO2. According to Nasa CO2 has increased by 400.06 parts per million. With trends  like these coupled with  extreme weather, both of which are clear indicators that global warming is occurring. Why are so many politicians still in denial?

 In the video below, Senator James Inhofe, a republican from Oklahoma brings a snowball to a Senator convention. He proceeds to talk about how 2014 was the warmest weather the United States has ever had. Yet, he says global warming cannot exist because of snow. In his talk he claims that 67 places in the United States have experienced record lows. Unfortunately, he does not understand that global warming is linked to extreme weather.  Senator James is not the only political figure who doesn’t understand how global warming works. An astounding 56 percent of all Congressional Republicans do not believe in global warming. Some believe that global warming is not a major concern and some believe that global warming is a natural phenomenon that does not occur due to human activity. In the article below there are many quotes by Senators and Representatives who do not believe in global warming.

 Global warming is a major issue in the world. Almost 97 percent of the science behind global warming says that it is natural but is occurring at a faster rate due to human activity.  Yet, the people that virtually run our country are in denial. How can we expect people’s habits to change if those who we turn to for answers are in denial about the issue? Can we make change and hopefully influence our government to change? I believe that if we have enough people and enough power behind the movement, anything can happen, just look at the push for gay marriage. It may have taken a long time, but here we are now as a nation, arguing for the right for people to marry whomever they please, and that is why I believe that we can change people’s views on global warming and begin to make a difference.

http://www.motherjones.com/blue-marble/2015/02/inhofe-snowball-climate-change(click on link and scroll to video)

http://climate.nasa.gov/

http://billmoyers.com/2015/02/03/congress-climate-deniers/

Ice Cores – A view into our past and future

Ice Core

An ice core is a cylindrical tube of solid ice that has been drilled out of an ice sheet or glacier. Most ice cores come from Greenland or Antarctica, the longest ice core is approximately three kilometers long. Ice cores provide researchers with a view into the temperatures and atmospheres of the past. If you were to slice a little disk out of an ice core you would see a bunch of little bubbles indicating gases that have been trapped in the ice for up to 800,000 years.

Ice Slice

So what do ice cores tells us? Why are they important? Ice cores relay important information about earth’s history every year involving temperature, atmosphere gas concentrations, volcanic eruptions, nuclear bombing, isotope ratios of water, and dust concentrations. In fact, when measuring how many years an ice core can date back to, researchers look to the well-known dates called “dating horizons”. A dating horizon is something like seasonal dust storms that can be used to mark periods of time, or a well-known volcanic eruption.

Sulfur Graph

Sulfur concentrations are the best way to tell when a volcanic eruption may have taken place. In the image above are the graphs of sulfate concentrations in ice cores from both Greenland and Antarctic. 73,880 years ago the Toba volcano in Indonesia erupted and sent historic amounts of ash and sulfur up into the stratosphere, effecting the whole planet years later in the form of acid rain.

With the information taken from ice cores, scientists are able to make predictions for earth’s climate in the future based on the past. By looking at the patterns of temperature and greenhouse gas levels post natural disasters like a volcanic eruption, scientists can make accurate predictions for our future.

One of the other things that scientists have been looking at in the ice cores is greenhouse gas levels. CO2 concentrations in the Antarctic ice cores show that over the past millennium they remained pretty constant in levels until the early 19th century and the industrial revolution. CO2 concentrations have been exponentially on the rise ever since then due to fossil fuel emissions and deforestation. According to the British Antarctic Survey, CO2 concentrations are at least 40% higher than they were before the industrial revolution. That doesn’t seem all that bad when you compare it to the CH4 (methane) concentrations over the past two centuries which has increased more than 200%.

Ice cores_science briefing_FINAL.indd

Looking at the ice cores it is easy to see that the highest levels of carbon dioxide are during the warmest years and the lowest during the coldest. This simply supports the statement that there is a link to rising temperatures and greenhouse gas emissions. Taking this information into consideration, the earth is only seeing an increase in greenhouse gas emissions even though we know that the increase doesn’t bode well for earth’s well-being. Taking into account earth’s history, we as the ones who inhabit earth should be doing everything we can to try and change the predicted future and potentially save ourselves from unforeseeable fates. Scientists have never seen greenhouse gas levels as high as they are now, so there is no predicting what will happen accurately, they can only guess.

A New Culprit?

The earthquake that hit Nepal is hardly news anymore. The 7.8 magnitude quake on April 25 caused enormous damage and even killed 19 on Mount Everest. If that wasn’t enough, the 6.3 magnitude aftershock the following day just rubs salt on the wound. Does anyone recall how earthquakes happen? The earth underground is made up of tectonic plates, which are like chunks of rock pressed and held together. When rocks slip past each other violently, break, or somehow make a jerky movement, the earth aboveground feels the tremors of those plates suddenly setting into a new place.

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Seems like everything underground is out of our control, doesn’t it? The most we do to the earth is drill it and no one seems to think those can cause an earthquake. Maybe not drilling, but Dr. Vivek Kumar Srivastava claims that global warming can cause an earthquake and undoubtedly has caused the one in Nepal. But how does heat in the atmosphere affect the earth beneath us? Well, it’s a chain reaction in this case. With the global temperature rising, ice and permafrost in the Arctic melts and raises sea levels. And perhaps a few centimeters of extra water wouldn’t be too bad, but sea levels have been on the rise for a while and are projected to rise by another 1 or 2 meters by 2100. Of course, coastal cities will be hit hardest, but this also means that there will be an extra 1 or 2 meters of water weight sitting all over the globe, adding much extra weight on the earth’s crust. Higher pressure on the earth’s crust causes the greater stress between the tectonic plates beneath us and therefore jerks much more violently into place.

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The connection seems plausible, and of course no one is pointing fingers. But will we be in the near future? It’s been repeated over and over again that humans are the greatest cause of global warming and that we would come to regret our inaction gravely in the future. But could this be that future? Collapsing food chains, heat waves, rising seas, we’re observing and hearing about them all. But some people in the world might be paying for the fury of global warming right now. I’m aware that, I’m using the word “might”. Are we still going to take that chance?