Tucson Citizen.com
Wry Heat - by Jonathan DuHamel

Posts Tagged ‘NASA’

NASA satellite data show climate models are wrong – again

Wednesday, July 27th, 2011

According to the University of Alabama:

Data from NASA’s Terra satellite shows that when the climate warms, Earth’s atmosphere is apparently more efficient at releasing energy to space than models used to forecast climate change have been programmed to “believe.”

The result is climate forecasts that are warming substantially faster than the atmosphere, says Dr. Roy Spencer, a principal research scientist in the Earth System Science Center at The University of Alabama in Huntsville.

The previously unexplained differences between model-based forecasts of rapid global warming and meteorological data showing a slower rate of warming have been the source of often contentious debate and controversy for more than two decades.

“The satellite observations suggest there is much more energy lost to space during and after warming than the climate models show,” Spencer said. “There is a huge discrepancy between the data and the forecasts that is especially big over the oceans.”

Not only does the atmosphere release more energy than previously thought, it starts releasing it earlier in a warming cycle. The models forecast that the climate should continue to absorb solar energy until a warming event peaks. Instead, the satellite data shows the climate system starting to shed energy more than three months before the typical warming event reaches its peak.

These data are examined in a new paper:

Spencer, R.W.; Braswell, W.D. On the Misdiagnosis of Surface Temperature Feedbacks from Variations in Earth’s Radiant Energy Balance. Remote Sens. 2011, 3, 1603-1613.

Read the full paper here.

See also:

Your Carbon Footprint doesn’t Matter

NASA Lowers Estimate of Carbon Dioxide Warming Effect

How Mother Nature Fools Climate Scientists

Astronomers predict a major drop in solar activity, that means a cold spell

A Basic Error in Climate Models

Moon has liquid core says NASA

Monday, January 10th, 2011

The Apollo moon missions planted seismometers on the Moon beginning in 1969 and collected data until 1977. Apparently those data were not fully analyzed until recently.

Modern, “State-of-the-art seismological techniques applied to Apollo-era data suggest our moon has a core similar to Earth’s.”

As a result of that analysis, NASA says:

the moon possesses a solid, iron-rich inner core with a radius of nearly 150 miles and a fluid, primarily liquid-iron outer core with a radius of roughly 205 miles. Where it differs from Earth is a partially molten boundary layer around the core estimated to have a radius of nearly 300 miles. The research indicates the core contains a small percentage of light elements such as sulfur, echoing new seismology research on Earth that suggests the presence of light elements — such as sulfur and oxygen — in a layer around our own core.

The inner iron core and fluid outer core explains how the Moon developed and maintains its strong magnetic field. By analyzing how seismic signals from Moonquakes were passed through or reflected, the researchers were able to deduce the composition and location of layer interfaces within the Moon.

A primary limitation to past lunar seismic studies was the wash of “noise” caused by overlapping signals bouncing repeatedly off structures in the moon’s fractionated crust. To mitigate this challenge, …the team employed an approach called seismogram stacking, or the digital partitioning of signals. Stacking improved the signal-to-noise ratio and enabled the researchers to more clearly track the path and behavior of each unique signal as it passed through the lunar interior.

Future NASA missions will help gather more detailed data. The Gravity Recovery and Interior Laboratory, or GRAIL, is a NASA Discovery-class mission set to launch this year. The mission consists of twin spacecraft that will enter tandem orbits around the moon for several months to measure the gravity field in unprecedented detail. The mission also will answer longstanding questions about Earth’s moon and provide scientists a better understanding of the satellite from crust to core, revealing subsurface structures and, indirectly, its thermal history.

Wryheat Top Ten Stories

Monday, December 27th, 2010

These ten stories were the most viewed for this blog:

Tarantula Hawks Deliver The Big Sting

Edible Desert Plants – Barrel Cactus Fruit

NASA Says Earth Is Entering A Cooling Period

Creatures of the Night: Kangaroo Rat

Gulf Oil Disaster – Beneath the Waves

Cancun Climate Conference, Japan Says No To Kyoto

What happened to the Gulf oil

Geologic Setting of Icelandic Volcanoes

The Chevy Volt, just the latest expensive toy

NASA’s Mono Lake Arsenic Microbes Not Quite As Advertized

To see a complete list of stories with links visit the Quick Link Index page.