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Forecasts and their Value

Economic Value of Weather and Climate Forecasts, Richard W. Katz and Allan H. Murphy, editors, 1997 includes some hard core math.  But the idea explored is straightforward enough, and much of each paper included is spent on the considerations which direct the mathematics, so you needn't be up on the math to gain from the reading. Fundamentally, a forecast...

Satellite Data

We've passed the 50th anniversary of the first meteorological satellite*, on to 60! Even though satellites have been used for decades, it's still far from simple to do so. Or, rather, it is much more involved than I used to think. I suppose it shouldn't really have been a surprise. Automated weather stations on earth have plenty of problems, and they're...

March for science

Dates to be determined, but there is an effort developing to have a march for science in the US.  There's a facebook group, and facebook messenger at @marchforscience, twitter as @ScienceMarchDC, and the main web site.  Things are evolving rapidly, having started very recently and now being over 90,000 in the facebook group.  One change being that it...

Recent Reading

If you hadn't noticed last time I wrote about my reading, I enjoy reading old books, and books about old things.  One of the interesting, to me, things about math/science/engineering is that it is incremental.  Each generation builds on what the preceding generations learned or accomplished.  Related truth is that I can read some of the best work from...

2016 Tough on Sea Ice Satellites

The last several weeks have been hard on the satellites people like me use most for determining sea ice coverage.  We use passive microwave instruments on a number of different satellites.  The 'passive' in its name means that it doesn't emit microwaves.  It just sits back and collects the emissions from where it's looking.  In this, the instrument...

Chapter one and Ted Fujita

Dr. Tetsuya Fujita, a.k.a. Ted, a.k.a. Mr Tornado was a meteorologist who spent most of his career at the University of Chicago.  When I was in graduate school, I was down the hall from him and a friend (Eric) was one of his students.  One day, Eric told me a Ted story.Dr. Fujita held up a book on fluid dynamics (one of the central subjects for studying...

Recent reading

I'm a bookaholic, I confess.  I have far more books than are strictly needed.  And I'm acquiring more essentially all the time.  (The freebies available via google, ibooks, kindle, nook, and many other venues don't exactly slow down my acquisition.)  On the other hand, I do eventually read them.  From recent (-ish) reading:Hands on Meteorology by Zbigniew...

Autism Awareness Month, 2016

A heads up that it's autism awareness month again.  Autism hasn't changed much in the past year, so I don't have much new to say.  My 2015 post covers what I have to say myself.  In brief: people are people, including autistic people.  People are all similar, because we're people.  And people are all different, because we are people.  All of this applies...

Earth-Sun distance and Chandler Wobble

Continuing from The Pacemaker of the Chandler Wobble, Grumbine 2014:The Chandler Wobble (CW) is a small variation in the orientation of the earth’s rotational axis [Chandler, 1891]. It has a period near 433 days [Liao and Zhou, 2004] (0.8435cycles per year, 0.0023095 cycles per day). Some source of energy for the Chandler Wobble  must exist because...

The Pacemaker of the Chandler Wobble

Abstract: The Chandler Wobble is one of the largest circumannual periodic or quasi-periodic variations in the earth's orientation.  After over a century of searching for its forcing, it was found to be caused by atmospheric circulation and induced ocean circulation and pressure.  The question of why there should be such forcing from the atmosphere has...

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