Scurvy Pumpkin Hunter
Halloween may be over but pumpkin may yet be on the menu. I’m talking about, of course, the Pumpkin Taco. Better make a run from the Bell or you’ll have little to be thankful for this month.
The reader of this blog may already know that we recently moved to Portland, Oregon.
Located about 10 miles northwest of downtown is a place called Sauvie Island. It’s the largest island on the mighty Columbia River and one of the largest river islands in the United States. I’d never heard of it before moving here.
The island is about 26,000 square acres and home to primarily farmland and protected wildlife areas and even a nude beach. Ever since we arrived it has been a popular destination to for us to visit for photography, picking our own produce, and bird watching.
It’s also home to some of the biggest pumpkin patches in the Portland area, including one that is “haunted,” the corn maze bit, yada yada yada.
It was also where my wife wanted to go pumpkin shopping. So, one find day, we grabbed our machetes and headed out to the island. After all, what could possibly go wrong?
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Goodness gracious, great galls of gyre!
For some reason, “G” was a real bitch. Oh sure, I considered writing about Greta Garbo. I considered “guillotine” but that word will figure quite prominently in “S” so it will have to wait.
I had a couple of other fleeting ideas, but they were not able to attach themselves to functional brain cells, so they are gone. For good. Maybe the title of this post should have been “Gone for Good.” Oh well.
Now it’s less than 90 minutes before I have to go to work and I’m staring at a blank form on my “new post” page. Arrrgh!
So there I was in bed, unable to sleep, so of course I was thinking, “What will I do for the ‘G’ post? Is ‘gyre’ even a word? If I played it in Scrabble I bet I’d get challenged!”
I knew I’d heard the word before. The internet provided the answer:
A gyre in oceanography is any large system of rotating ocean currents, particularly those involved with large wind movements. Gyres are caused by the Coriolis Effect; planetary vorticity along with horizontal and vertical friction, which determine the circulation patterns from the wind curl (torque). The term gyre can be used to refer to any type of vortex in the air or the sea, even one that is man-made, but it is most commonly used in oceanography, to refer to the major ocean systems. (Wikipedia.)
Oh yes! Now I remember. Isn’t that interesting? Eh, no? Perhaps we can add a little human drama that makes it more compelling.
The northern Pacific Ocean is the location of the North Pacific Gyre, one of the five major oceanic gyres. Besides that interesting factoid, it has another, more remarkable characteristic. It is also home to the Great Pacific Garbage Patch.
Estimated to cover an area approx. twice the size of Texas, The Patch is the site of an unusually intense collection of man-made marine debris.
The Patch is characterized by exceptionally high concentrations of pelagic plastics, chemical sludge, and other debris that have been trapped by the currents of the North Pacific Gyre. The Patch is characterized by exceptionally high concentrations of pelagic plastics, chemical sludge, and other debris that have been trapped by the currents of the North Pacific Gyre.
It is estimated that the source of pollution which ends up in The Patch comes from land-based and ship-based sources. For example, “a typical 3,000 passenger cruise ship produces over eight tons of solid waste weekly, a major amount of which ends up in the patch, as most of the waste is organic.” Also, pollutants from the west coast of the United States can reach The Patch in about six years while pollution from the east coast of Asia can take one year or less.
The Great Pacific Garbage Patch has one of the highest levels known of plastic particulate suspended in the upper water column. As a result, it is one of several oceanic regions where researchers have studied the effects and impact of plastic photodegradation in the neustonic layer of water. Unlike debris, which biodegrades, the photodegraded plastic disintegrates into ever smaller pieces while remaining a polymer. This process continues down to the molecular level.
As the plastic flotsam photodegrades into smaller and smaller pieces, it concentrates in the upper water column. As it disintegrates, the plastic ultimately becomes small enough to be ingested by aquatic organisms which reside near the ocean’s surface. Plastic waste thus enters the food chain through its concentration in the neuston.
Some plastics decompose within a year of entering the water, leaching potentially toxic chemicals such as bisphenol A, PCBs and derivatives of polystyrene.
And, in a bit of planetary karma:
Some of these long-lasting plastics end up in the stomachs of marine birds and animals, and their young, including sea turtles and the Black-footed Albatross. Besides the particles’ danger to wildlife, the floating debris can absorb organic pollutants from seawater, including PCBs, DDT, and PAHs. Aside from toxic effects, when ingested, some of these are mistaken by the endocrine system as estradiol, causing hormone disruption in the affected animal. These toxin-containing plastic pieces are also eaten by jellyfish, which are then eaten by larger fish. Many of these fish are then consumed by humans, resulting in their ingestion of toxic chemicals. Marine plastics also facilitate the spread of invasive species that attach to floating plastic in one region and drift long distances to colonize other ecosystems.
Pollution from The Patch is estimated to impact at least 267 species worldwide.
This is my “G” post for the April 2011 “A to Z Blogging Challenge.”