Year: 2012

New data from Antarctica suggests that the south pole icecap is not warming, as predicted by climate models.

12:53 pm

New data from Antarctica suggests that the south pole icecap is not melting, as predicted by climate models.

It turns out that past studies, which were based on computer models without any direct data for comparison or guidance, overestimate the water temperatures and extent of melting beneath the Fimbul Ice Shelf. This has led to the misconception, Hattermann said, that the ice shelf is losing mass at a faster rate than it is gaining mass, leading to an overall loss of mass. The model results were in contrast to the available data from satellite observations, which are supported by the new measurements.

The team’s results show that water temperatures are far lower than computer models predicted, which means that the Fimbul Ice Shelf is melting at a slower rate. Perhaps indicating that the shelf is neither losing nor gaining mass at the moment because ice buildup from snowfall has kept up with the rate of mass loss, Hattermann said.

In other words, the climate models were wrong. When actual data was obtained, first by satellites and now from the water under the ice shelf itself, the new data found that the ice shelf is stable, not melting as predicted.

2 comments

Two exoplanets in a tight orbital dance.

12:31 pm

Two exoplanets in a tight orbital dance.

“These are the closest two planets to one another that have ever been found,” Agol said. “The bigger planet is pushing the smaller planet around more, so the smaller planet was harder to find.”

Orbiting a star in the Cygnus constellation referred to as Kepler-36a, the planets are designated Kepler-36b and Kepler-36c. Planet b is a rocky planet like Earth, though 4.5 times more massive and with a radius 1.5 times greater. Kepler-36c, which could be either gaseous like Jupiter or watery, is 8.1 times more massive than Earth and has a radius 3.7 times greater.

But wait, there’s more!

The fact that the two planets are so close to each other and exhibit specific orbital patterns allowed the scientists to make fairly precise estimates of each planet’s characteristics, based on their gravitational effects on each other and the resulting variations in the orbits. To date, this is the best-characterized system with small planets, the researchers said.

They believe the smaller planet is 30 percent iron, less than 1 percent atmospheric hydrogen and helium and probably no more than 15 percent water. The larger planet, on the other hand, likely has a rocky core surrounded by a substantial amount of atmospheric hydrogen and helium.

2 comments

According to this article, the water-ice discovered at Shackleton Crater is insufficient for human settlement.

8:44 am

The uncertainty of science: According to this article, the water-ice discovery announced yesterday at Shackleton Crater is insufficient for human settlement.

The latest LRO data indicate “that water is not there … in a way that would facilitate human exploration,” says planetary scientist Maria Zuber, who led the team analyzing the data.

If the signatures the team saw in the soils on the crater floor do indicate water, how much water might there be? Roughly 100 gallons – enough to fill two or three residential rain barrels – spread over a surface of about 133 square miles. Leave the swim-suit at home. “This is not like Mars,” says Dr. Zuber, a professor at the Massachusetts Institute of Technology in Cambridge, in an interview. On the red planet, explorers would find thick layers of icy soil in many locations just by turning over a shovelful or two of topsoil. [emphasis mine]

This story seems to answer my question about Zuber’s participation in the water in Shackleton paper as well as the previous paper saying there is much less water on the Moon than previously believed. It also raises questions about the journalism work of many of the other stories published in the past few days, which heavily touted the possibility of water in Shackleton.

I intend to dig into this story a bit more. Stay tuned.

6 comments

“And ask yourself this, if they’re that egregious at lying on that issue, what else are they lying about?”

10:23 pm

“And ask yourself this, if they’re that egregious at lying on that issue, what else are they lying about?”

Meanwhile, on the same day that the President invoked executive privilege to avoid giving Congress emails and documents concerning the Fast-and-Furious gunrunning scandal, the Attorney General admitted lying in his testimony to a House committee, and that same committee voted to hold the Attorney General in contempt, ABC News has as its lead story … the heat wave in the northeast.

As I’ve said many times before, if you depend on television news to find out what’s going in the world, you’re not merely uninformed, you are misinformed.

1 comment

The TSA’s security checkpoint of the future.

9:57 pm

The TSA’s security checkpoint of the future.

After checking their luggage, passengers would identify themselves not with driver’s licenses and paper boarding passes, but by scanning fingerprints or irises to prove they have an electronic ticket. Passengers would walk with their carry-ons through a screening tunnel, where they’d undergo electronic scrutiny — replacing what now happens at as many as three different stops as they’re scanned for metal objects, non-metallic items and explosives. …

If screeners notice anything suspicious, a passenger would still be pulled aside and possibly patted down.

There’s a lot more. Read it all. For example, there’s this quote:

The so-called riskiest or unknown passengers would face the toughest scrutiny, including questioning and more sensitive electronic screening. Those who voluntarily provide more information about themselves to the government would be rewarded with faster passage.

I call this Orwell’s 1984 come to life, a totalitarian’s dream and a free person’s nightmare. Once in place, what’s to prevent this from spreading to all phases of life? Nothing. You give government this kind of power and it will use it, and that use will not be for your benefit, but for the government’s benefit alone.

I fear that freedom is dying, one security checkpoint at a time.

0 comments
1 … 107 108 109 110 111 … 224