Sunday, May 31, 2009

Potpourri XLVIII

Jeez, get off the net for a couple days, and all sorts of stuff backs up my inbox...

Checking the books...tip o' the fedora to Lin, for forwarding an alternate way to ensure accountability in your local government schools: don't ask to see the budget, ask to see the check register.

Another from Lin: an editorial by David Brooks on the Obama administration's ongoing takeover of the private sector.

This message/link from Scott is perfect as is:

This is from Pravda, and talks about America’s descent into Marxism. They ought to know.

The Herpa DC-3 got stuck in the "Illinois gumbo" (mud) on its tour around America.

The Singularity really IS near: a robotic scientist makes the first independent contribution to science.

Where's the outrage? The President goes out on a fundraising trip--never cheap, no matter if he goes by car, train, or plane--and the taxpayers are helping him jack up the budget deficit and the President's carbon footprint.

Speaking of the President, a reporter fan got unruly when the Secret Service wouldn't let her get close enough to hand him a letter.

French President Nicholas Sarkozy appoints a global warming skeptic to a key government environmental post. Signs of sanity in Le France.

Europe's most expensive hotel opens. Wow. Here's the official site if you'd like to see more. Again, wow.

My Google Alerts returned a lot of articles on Ares I-X and ISDC this week. That's good, since I didn't attend most of the sessions. Got to keep up somehow. And away we go:

  • Kennedy Space Center Director Cabana thinks the Ares I-X launch "has a good chance" of launching in September.
  • Spaceflight Now discussed the impending turnover of Launch Complex 39B to Ares.
  • Jeff Greason, CEO of XCOR Aerospace, spoke at the International Space Development Conference about the need for the media and the general public to "chill out" about flight tests, including Ares I-X. Tests are there to find problems and learn how to fix them.
  • Rand Simberg's Transterrestrial Musings covered ISDC.
  • Web feature from on modal tests for Ares I-X.
  • Universe Today posted a NASA-developed Ares I-X image (Media Fusion, in point of fact).
  • This is an article from last year, but it provides an overview of the Ares I-X manufacturing done on Ares I-X at Glenn Research Center in Ohio.

What has NASA done for the environment lately? Check this out:


WASHINGTON -- Researchers have conducted the first global analysis of the health and productivity of ocean plants using a unique signal detected by NASA's Aqua satellite.

Ocean scientists can now remotely measure the amount of fluorescent red light emitted by phytoplankton and assess how efficiently these microscopic plants turn sunlight and nutrients into food through photosynthesis. Researchers also can study how changes in the global environment alter these processes at the center of the ocean food web.

Single-celled phytoplankton fuel nearly all ocean ecosystems, serving as the most basic food source for marine animals. Phytoplankton account for half of all photosynthetic activity on Earth and play a key role in the balance of carbon dioxide in the atmosphere. The health of these marine plants affects the amount of carbon dioxide the ocean can absorb from the atmosphere and how the ocean responds to a changing climate.

"This is the first direct measurement of the health of the phytoplankton in the ocean," said Michael Behrenfeld, a biologist who specializes in marine plants at Oregon State University. "We have an important new tool for observing changes in phytoplankton every week, all over the planet."

All plants absorb energy from the sun, typically more than they can consume through photosynthesis. A small fraction of this extra energy is re-emitted as fluorescent light in red wavelengths.

Using the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA's Aqua satellite, scientists have now observed "red-light fluorescence" over the open ocean. MODIS is the first instrument to observe this signal on a global scale.

"The amount of fluorescent light emitted is not constant; it changes with the health of the plant life in the ocean," said Behrenfeld.

Scientists previously used satellite sensors to track the amount of plant life in the ocean by measuring the amount and distribution of chlorophyll.

"Chlorophyll gives us a picture of how much phytoplankton is present," said co-author Scott Doney, a marine chemist from the Woods Hole Oceanographic Institution in Woods Hole, Mass. "Fluorescence provides insight into how well they are functioning in the ecosystem."

With this new measurement, the scientists discovered large areas of the Indian Ocean where phytoplankton were under stress from iron deficiency. They were surprised to see large portions of the ocean "light up" seasonally as phytoplankton responded to a lack of iron in their diet. The amount of fluorescence increases when phytoplankton have too little iron, a nutrient in seawater. Iron reaches the sea surface on winds blowing dust from deserts and other arid areas, and from upwelling currents.

The research team detected new regions of the ocean affected by iron deposition and depletion. In the fall and winter and especially the summer, significant southwesterly winds over the Indian Ocean stir up ocean currents and bring more nutrients up from the depths for the phytoplankton to feed on. At the same time, the amount of iron-rich dust delivered by winds is reduced.

Climate change could mean stronger winds pick up more dust and blow it to the sea, or less intense winds leave waters dust-free. Some regions will become drier and others wetter, changing the regions where dusty soils accumulate and get swept up into the air. Phytoplankton will reflect and react to these global changes.

"On time-scales of weeks to months, we can use this data to track plankton responses to iron inputs from dust storms and the transport of iron-rich water from islands and continents," Doney said. "Over years to decades, we also can detect long-term trends in climate change and other human perturbations to the ocean."

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