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Wry Heat - by Jonathan DuHamel

Posts Tagged ‘NASA’

NASA hypes Arctic algal blooms as “unprecedented” but they are common

Saturday, September 29th, 2012

The NASA headline reads: “NASA Discovers Unprecedented Blooms of Ocean Plant Life.” Within the article we find:

“Scientists have made a biological discovery in Arctic Ocean waters as dramatic and unexpected as finding a rainforest in the middle of a desert. A NASA-sponsored expedition punched through three-foot thick sea ice to find waters richer in microscopic marine plants, essential to all sea life, than any other ocean region on Earth. The finding reveals a new consequence of the Arctic’s warming climate and provides an important clue to understanding the impacts of a changing climate and environment on the Arctic Ocean and its ecology.”

“If someone had asked me before the expedition whether we would see under-ice blooms, I would have told them it was impossible,” said Kevin Arrigo of Stanford University in Stanford, Calif., leader of the ICESCAPE mission and lead author of the new study. “This discovery was a complete surprise.” (See full article here)

Perhaps these NASA scientists should research the scientific literature more carefully. If they did, they might have discovered that Arctic algal blooms are not “unprecedented” or even unusual.

For instance, we have this paper from 1996 reporting on research in 1993:

Occurrence of an algal bloom under Arctic pack ice” by R. Gradinger, Marine Ecology Progress Series, Vol. 131.

Abstract:

“Summer melting of sea ice leads to the formation of under-ice melt ponds in Arctic seas. The biological characteristics of such a pond were studied in summer 1993. The chlorophyte Pyramimonas sp. (Prasinophyceae) formed a unialgal bloom with cell densities of 19.1 thousand cell per ml and a pigment concentration of 29.6 mg per cubic meter. A comparison with ice core data revealed differences in algal biomass and community structure. Physical data indicate that under-ice ponds are a common feature in the Arctic Ocean. Thus, communities within under-ice ponds, which have not been included in production estimates, may significantly contribute to the Arctic marine food web.”

I wonder if the Arizona Daily Star will, in a few days, report NASA’s “unprecedented” discovery just as the Star uncritically reported the last NASA “unprecedented” claim: Greenland “melting” and media hype.

H/t WUWT

See also:
The Arctic-Antarctic seesaw
Arctic ice reached record low extent in 2012 – or maybe not

Greenland “melting” and media hype

Thursday, July 26th, 2012

A press release from NASA titled “Satellites See Unprecedented Greenland Ice Sheet Surface Melt” set off a media frenzy and many blog articles reporting a great melting of 97% of the Greenland glacier surface. This announcement was based on a change in albedo, detected by satellites, which was interpreted as surficial melting. It is true that for a few hours between July 9 and 12, the surface temperatures crept barely above freezing. But, according to the Byrd Polar Research Center, changes in albedo can also be caused by temperature-driven snow metamorphism that reduces reflectivity by rounding the sharp ice crystal edges that scatter visible light and by increased snow impurities like carbonaceous soot from wildfires or diesel exhaust. We note that there have been many large, soot-creating wildfires lately.

Whatever the cause of the recent, sort-lived change in albedo, of greater concern is the news release itself with its hyped title and contradictory content. The ‘melting’ event was not “unprecedented.” Within the press release is this: “’Ice cores from Summit show that melting events of this type occur about once every 150 years on average. With the last one happening in 1889, this event is right on time,’” says Lora Koenig, a Goddard glaciologist and a member of the research team analyzing the satellite data.” Ice cores from another station (NEEM) showed similar melting in 1879 and 1935. It seems that the news release headline was purposely hyped to grab headlines, and so it did. This event does not bode well for NASA’s scientific reputation and shows that NASA is becoming much more political than scientific.

I’ve noticed that the term “unprecedented” is a favorite with global warming alarmists. It says much about NASA that they would write a self-contradictory press release, accompanied by a very misleading graphic, and also much about the credulous media (such as the Arizona Daily Star) which used the word “unprecedented” even though their own stories clearly showed it was not.

Below is a satellite image of Greenland from July 12, 2012. It does not appear to be melting. Also below is the temperature record for July from Summit Camp which sits atop the continental glacier at an elevation of 10,551 feet and a view from the live webcam at Summit Camp.

 

 

 

 

 

  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 See also

Greenland from 39000 feet  some photos I took of Greenland in June.

 

 

 

 

 

 

 

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