Articles

Aug 17 2015

Your tax dollars at work – Science or Birds?

Author: DakotaBirder • Discussion: No Comments
Photo of Double-crested Cormorant - By Terry Sohl

Double-crested Cormorant. Clearly by the evil look in his eye, you can tell he’s up to no good. Clearly, this 2 pound bird is a much better fisherman than all the “sportsmen” in the Pacific Northwest, as cormorants have been (wrongly) accused of destroying salmon populations in the region.

Ah, the perks of being a government scientist.  The high pay.  The adulation. The outpouring and love from an American public that doesn’t seem to believe in science any more, a public that seems quite content to ignore those pesky temperature increases on their thermometer, a public that would rather believe that great-great-grandpa Eddie used to ride around on a dinosaur than believe in evolution.  It just keeps better and better.  At least there’s the work, right?  The thought of doing real, unbiased SCIENCE for the public good?

Well sure, there is the work itself.  It’s just a wee bit disheartening however to DO the work the government asks you to do, but have that work ignored by said government.  With that as background…

If you’re not aware of it, there have been active campaigns against the evil Double-crested Cormorant for decades now, with interest groups (primarily fishermen and other “sportsmen”) claiming that the birds are eating all their fish, and therefor they must be destroyed.  It’s been in multiple locations, from the South, to the Great Lakes, and most recently, on the Columbia River basin where fisherman are bemoaning declining salmon populations.  One COULD blame over-fishing.  One COULD also blame a much warmer northern Pacific (global warming anyone?) that has been shown to be taking a toll on salmon.  But no…of course it’s none of that according to these brilliant “sportsmen”.  It’s the evil Double-crested Cormorant that is eating all of “their” salmon.

You might wonder how a species that’s co-existed with salmon for thousands of years suddenly is (supposedly) single-handedly wiping out Cormorant populations.  The U.S. Fish and Wildlife Service was also wondering, and thus tasked their biologists to study the issue.  The conclusion from the government scientists?  Double-crested Cormorants weren’t having much of an impact, if any, on salmon populations in the Columbia.  The next course of action by Fish & Wildlife?  Giving their stamp of approval on a plan to KILL 10,000 Double-crested Cormorants in the region.

Yes, that’s correct. Your tax dollars pay for scientists to study EVIDENCE, to use the best available techniques and analyses to study issues such as this.  In this case, government biologists found no connection between the birds and the salmon.  That same government, however, decided to ignore their scientists and STILL start the slaughter of 10,000 birds.  Why?  I’m sure it has EVERYTHING to do with politics and keeping the “sportsman” (HAH!!) lobby happy.  It sure as hell has nothing to do with the science.

If I’m a tax payer, I’m wondering what the hell the government is doing, playing politics instead of paying attention to the science.

As a fellow government scientist, I’m left wondering why the hell any of us are doing our jobs, if our work is going to be ignored.

Jul 18 2015

A nerdy scientist’s assessment of risk – Tornadoes vs. Earthquakes

Author: DakotaBirder • Discussion: 2 Comments
Tornado Risk map - Dakotas

Tornado risk map from the National Weather Service for July 17th, 2015. Sioux Falls was squarely within the 2% zone, meaning there was a 2% chance of a tornado being seen somewhere within 25 miles of your location. Somehow…we all survived.

While at a conference for work in Portland last week, my colleague and I had a nice supper with two USGS colleagues who work in Menlo Park, California and Seattle, Washington, respectively.  We had relayed the news that the night before, there was storm damage in the area, with straight line winds and tornadoes both causing damage.  The West Coast colleagues…oh…let’s just call them “Ben” and “Tamara”…were flabbergasted that we’d want to live in an area so prone to devastating storms.

Tonight, the National Weather Service put out the map I’m showing here, noting that parts of South Dakota had either a 5% or 2% chance of a tornado hitting somewhere within 25 miles of your location. Let’s do the math!  What are the odds of a tornado hitting YOUR exact location on a night like this, when tornadoes were indeed spotted?

An area with a radius of 25 miles is over 54 billion square feet of territory. What are the odds of a tornado hitting your bit of territory, with a 2% chance of one being seen somewhere in this area? The average tornado path is 4 miles, or 21,120 feet. Average width is 500 feet. The average damage path is 10.5 million square feet. Even if you’re in the highest probability area, 5% chance of one being seen relatively near, the chances of one hitting YOUR chunk of territory…0.0010%. For the 2% chance of a tornado near you, the odds are 0.0004% it will strike your exact location.

Without Warning - Oregon Cascadia earthquake Comic

An actual comic-like booklet put out by the Oregon Office of Emergency Management. Yes, West Coasters…you’re in imminent danger of being swallowed whole by a massive earthquake. Tornadoes in the Plains? They’re nothing in comparison.

Just a guess…but we probably have chances similar to this only like 4-5 times a year. If you just use the same strike probability assumptions, you thus only have, likely at absolute most, a 0.0050% chance of a tornado hitting your location in a given year.

That’s an average of about one hit on your exact location every 20,000 years. Most tornadoes are weak F0 or F1, so even a hit might not be that bad.

Now, let’s reconsider the situation for my colleagues living in California and Seattle.  This week the New Yorker ran a story about the upcoming massive Cascadia subduction zone earthquake that could hit, The story said on average, something similar to the massive 1700 earthquake thought to have hit the area occurs about once every 250 years.

Put it all together, and Seattle is 80X as likely to get walloped with a 9.0 earthquake as Sioux Falls is to get a direct hit from a tornado, and even a direct tornado hit in Sioux Falls is likely to be far, far, less damaging than any earthquake.

You are welcome, West Coast storm-haters.  I hope I have reassured you that is once again safe to visit us in stormy Sioux Falls.  🙂

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