Water_Resource_Plan

Contains the smaller Agulhas Current System Antarctic Circumpolar Current Weddell Sea Subpolar Gyre (Southern Ocean) Ross Sea Subpolar Gyre (Southern Ocean) North Pacific Subpolar Gyre Contains the smaller Alaska Gyre North Pacific Subtropical Gyre aka North Pacific Gyre North Pacific Current, California Current, North Equatorial Current, Kuroshio Current () The gyre that I will be focusing on is the North Pacific Gyre. This gyre occupies the major portion of the North Pacific Ocean. A high-pressure zone is at the center of a subtropical gyre around which the circulation is clockwise in the Northern Hemisphere and counter clockwise in the Southern Hemisphere. This is the Coriolis force (the equation of motion of an object in a rotating frame of reference), which you can observe for yourself in your bathroom. It is what causes the bathwater to drain in clockwise vortex above the equator and in a counter clockwise vortex below the equator. See the illustration below to get an idea of how the different currents rotate within the North Pacific Gyre. Figure 1 North Pacific Subtropical Gyre() The Problem The circulation of the North Pacific Gyre is rotating within the better part of the Northern Pacific Ocean. The currents rotate in a clockwise direction and covers about 10 million square miles of the Northern Pacific Ocean. Any debris that is swept up by the current that flows along the North Pacific Rim accumulates within the gyre’s vortex between the west coast of North America and the Hawaiian Islands. This mass of accumulated garbage covers an area twice the size of Texas and extends 100 feet below the surface. Eighty percent of the trash within the gyre has a terrestrial origin and consists mostly of plastic of all types. Also found within the garbage is rope, nylon fishing line, drift nets, barrels of toxic substances, untreated human waste, various toxic substances, and countless marine animal species, including whales, dolphins and sea turtles that have become trapped in the debris or succumbed to the toxic effects of the area. And that’s not counting the million or so albatrosses that have fallen victim to ingesting plastic they have mistaken as a food source and the 500,000 albatross chicks that have perished as a result of consuming plastic fed to them by their parents. Plastic is not biodegradable, so it does not eventually disintegrate and be rendered harmless. What it does, after extended exposure to sunlight, is break up into smaller and smaller pieces until it is finally rendered into a grain like substance called ‘plastic sand’ which has, so far, according to ocean and environmental experts and scientists, proven to be impossible to clean up. The gyre occasionally slings huge amounts of the accumulated garbage onto beaches that are within the gyre. Hawaiian beaches can be inundated with several feet of trash that has been washed onto shore from the gyre. The larger pieces of debris are collected and properly disposed of. Accumulation of plastic sand on beaches and drifting in the ocean and other accumulated trash is a problem whose affects every continent including both poles. (Silverman, 2007). In 2006, Congress passed legislation that would increase funding for cleanup efforts and ordered several government agencies to expand cleanup efforts. This is an important step, but cleanup efforts are like putting a Band-Aid on a gunshot wound. There need to be steps taken to stop the dumping of waste from ocean going vessels and stiff fines handed out to all violators, including the operators of oil tankers. The trash that has a land-based origin has to stop, starting with a nationwide ban on the production and use of petroleum based plastic grocery bags. If we can accomplish the discontinuation of plastic grocery bag use, we can find alternative substances to replace the use of plastic altogether. Recycling programs need to be nationalized and mandatory for everyone including the government.