Science

World Climate Report

snow-palms.jpgI had a chat with a colleague at work this morning about the recent snowfall in Malibu, California. He chuckled, “It’s the Gore effect,” and told me about an article he saw on Instapundit, “Wherever Al Gore goes, unusually low temperatures seem to follow.”

I read Instapundit’s article and found that the term “Gore effect” has actually made it into the Urban Dictionary.

My colleague and I had a good chuckle over that.

Having heat or cold spells is hardly unusual — it’s just the way things go. Long term temperature and climate effects are in the domain of the Sun’s behavior and there is little we can do about that. Short term phenomena will average out to the global mean annual temperature — which seems to be cooling off a bit according to this report about the Nordic sea ice expansion from World Climate Report:

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Comet McNaught Transits SOHO

This is simply extraordinary . . . We’re in awe.

Brightest Comet in Over Forty Years

Comet McNaught (C/2006 P1) has not only become the brightest comet SOHO has ever seen, but even the brightest comet observed in over forty years! The comet swung by the sun on Jan 12th – 15th, and is now emerging into the skies of the southern hemisphere. During its close encounter with our mother star, comet McNaught became a naked-eye object in broad daylight. It was discovered on August 7th, 2006 by the hugely successful comet discoverer Rob McNaught (Siding Spring Survey). At time of discovery, the comet was a very faint object, but the predicted perihelion distance (closest distance to the sun) of just 0.17 AU indicated already that the object had the potential to become very bright.

As you are probably aware, the LASCO instrument on-board SOHO has the ability to watch comets as they get extremely close to the Sun. Fortunately for us, comet McNaught has passed right through the LASCO C3 field of view! We do not know exactly the peak brightness of the comet yet, but it is definitely brighter than -3 mag! It is thus much brighter than comet NEAT or comet 96P/Machholz. In other words, comet McNaught is by far the brightest and most spectacular comet SOHO has ever seen!

Comet McNaught Visible in Broad Daylight

mcnaught-soho.jpgThis may be a once in a lifetime celestial event for Earthlings to witness. A sun-grazing comet, McNaught, is visible to the naked eye in broad daylight! If you have clear skies, you should step outside today and try to observe the comet.

SOHO also “sees” the comet, but it’s so bright in the sky it badly blooms the image.

Image: SOHO LASCO C3 view of McNaught.

Read more about how to observe this spectacle from SpaceWeather.com:

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Archeology from Space

Archeology is one of my favorite interests. I am always interested in what’s going on in the world of unearthing ancient artifacts. We will probably watch the segment on PBS’ Nova tomorrow evening that deals with satellite surveys of ancient ruins.

Mayan Ruins on PBS

mayan-mural.gifJanuary 5, 2007: For many years, space archeology has been a favorite topic of Science@NASA readers: NASA scientists use Earth-orbiting satellites to find ancient ruins invisible from ground level. Prime real estate for this kind of discovery is Central America. In that part of the world, satellites are not only revealing long-held secrets of the Maya, but also improving the everyday lives of modern Central Americans by helping them monitor and manage their environment.

Image: a 2,000-year-old mural, one of the greatest discoveries of ancient Maya art ever found – NASA

For an update on this important work, we encourage you to tune in to a new PBS broadcast on Tuesday, Jan. 9th. It features pioneering space archaeologist Tom Sever (Marshall Space Flight Center) and colleague Bill Saturno (University of New Hampshire) discussing their latest discoveries.

  • Channel: Your local PBS station
  • Program: Nova scienceNow
  • Date: Tuesday, Jan. 9th at 8 pm EST. Program times may vary. Check local listings for confirmation.

The 60 minute program features four 15-minute reports on various topics. “Mayan Ruins” is second in line and is narrated by astrophysicist Neil DeGrasse Tyson.

Goin’ South

According to some GPS data compiled by geological scientists, New Orleans is sliding into the Gulf of Mexico. It seems that the city is situated on a big, moving mass of bedrock that is detached from the North American Continent. Over the next few thousand years, this rock will slowly move south toward the Gulf, but it is simultaneously sinking at more than twice the rate at which it is moving.

I wonder who New Orleans Mayor Nagin, Louisiana Governor Blanco and the Democrats will blame for this other natural phenomenon?

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Solar Cycle 24 = Lots of Spots

NASA Scientists studying the relationship between the Sun’s magnetic activity and the peak number of sunspots, have discovered a six-year relationship between the two phenomena. If the trend continues as it has since 1868, we should experience a count of about 160 sunspots during the next solar cycle peak, due in 2011. Previous correlations between climate and sunspot count may also indicate a warmer climate during this cycle.

Right: An erupting solar prominence photographed by the Solar and Heliospheric Observatory (SOHO).

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Solar Tsunami

This may be more evidence that the Sun is entering one of it’s most active solar maximums in modern times. The solar flare from December 6, 2006 was so intense that it caused a virtual tsunami of solar plasma to ripple away from sunspot 930.

The interesting thing about this event is that it occurred far enough ahead of the maximum to allow it to be studied in detail without having to deal with the chaos associated with the maximum. Hang on and enjoy the ride. I have a feeling we’re in for an interesting display of climate and electromagnetic effects from our Sun.

Image courtesy SpaceWeather.com

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