Meteorologists investigate Airborne jet streams bringing both floods and drought relief

A satellite image showing water-vapour concentration reveals an atmospheric river (yellow) streaming northeast across the Pacific Ocean.

Californians call it the Pineapple Express: a weather pattern that zips across the Pacific Ocean from Hawaii, delivering not baskets of tropical fruit, but buckets of rain and snow.

In meteorological terms, the Pineapple Express is an atmospheric river, a narrow band of air that carries huge amounts of moisture.

For the next six weeks, meteorologists will be plying the eastern Pacific by air and sea, in the hope of catching several atmospheric rivers barrelling towards the coast.

It is the biggest push yet to understand these phenomena, which have received serious scientific attention only in the past decade.

Atmospheric rivers get their start over warm tropical waters; they then flow eastwards and towards the poles a kilometre or two above the ocean surface.

They may stretch for thousands of kilometres, but are only a few hundred kilometres wide. When they hit land, they start to drop their moisture in torrential downpours or blizzards.

“When we have too many atmospheric rivers, floods can occur, and when we don’t have enough we gradually fall into drought,” says Marty Ralph, a meteorologist at the Scripps Institution of Oceanography in La Jolla, California, and a leader of the field campaign.

In Europe, atmospheric rivers affect mostly the western part of the continent, but they can be felt as far inland as Poland.

In North America, the entire west coast is affected, and parts of the central and eastern United States occasionally feel the effects of atmospheric rivers that develop over the Gulf of Mexico.

The moisture is often welcome, bringing up to half of the year’s water supply in affected areas1.

A 2013 study found that as many as three-quarters of all droughts in the Pacific Northwest between 1950 and 2010 had been brought to an end by atmospheric-river storms2.

California has been stricken by drought for years (Nature 512, 121–122; 2014), but last month, an atmospheric river dropped enough rain to erase one-third of the water deficit of one major reservoir in just two days.

Climate change may bring stronger and more frequent atmospheric rivers, because the warmer the atmosphere is, the more water it can hold, says David Lavers, a meteorologist at Scripps who is not involved in the project.

“The more you know about how the atmosphere behaves,” he says, “the better position you’re in to prepare for extreme events.”

Read the full article on Nature website - Nature 517, 424–425 (22 January 2015) doi:10.1038/517424a

NASA investigating deep-space hibernation technology

Credit: 20th Century Fox

Manned missions to deep space present numerous challenges. In addition to the sheer amount of food, water and air necessary to keep a crew alive for months (or years) at a time, there's also the question of keeping them busy for the entirety of a long-duration flight.

Exercise is certainly an option, but the necessary equipment will take up space and be a drain on power.

In addition, they'll need room to move around, places to sleep, eat, work, and relax during their down time.

Otherwise, they will be at risk of succumbing to feelings of claustrophobia, anxiety, insomnia, and depression, among other things.

NASA has been looking at a few options and one proposed solution is to put these crews into an induced state of hypothermia resulting in torpor, a kind of hibernation.

Rather than being awake for months or years on end, astronauts could enter a state of deep sleep at the beginning of their mission and then wake up near the end.

This way, they would arrive refreshed and ready to work, rather than haggard and maybe even insane.

If this is starting to sound familiar, it's probably because the concept has been explored extensively by science fiction.

Though it goes by different names, cryosleep, reefersleep, cryostasis, etc., the notion of space explorers preserving their bodies through cryogenic suspension has been touched upon by numerous sci-fi authors, movies and franchises.

But NASA's plan is a little different than what you might remember from 2001: A Space Odyssey or Aliens.

Artist’s concept for Mars-ready habitat. 

Credit: SpaceWorks

Instead of astronauts stepping into a tube and having their temperature lowered, torpor would be induced via the RhinoChill, a device that uses invasive tubes to shoot cooling liquid up the nose and into the base of the brain.

To research the technology, NASA has teamed up with SpaceWorks, an Atlanta-based aerospace company that is investigating procedures for putting space crews into hibernation.

During this year's International Astronomical Congress (IAC) 2014, which took place from Sept. 29th to Oct. 3rd in Toronto, representatives from SpaceWorks shared their vision.

Artist’s concept of “sleeping to Mars”. Credit: SpaceWorks Enterprising

According to the company, inducing torpor in a crew of astronauts would eliminate the need for accommodations like galleys, exercise equipment, and large living quarters.

Instead, robots could electrically stimulate key muscle groups and intravenously deliver sustenance to ensure the health and well being of the astronauts while in transit.

As Dr. Bradford, President of SpaceWorks Enterprises Inc., stated:
"We have completed the initial evaluation of our concept which demonstrated significant benefits against non-torpor Mars mission approaches and established the medical plausibility of torpor."

"We have expanded our team and put together a development plan that we are in the process of executing."

"While the longer term goal of enabling access to Mars is our ultimate objective, we have a number of near-term, commercial applications for this technology that we will develop along the way."

Read the full article here

ESA PLATO: 34 European space telescopes will investigate one million stars

This is what the planet-hunter PLATO could look like. 

The image shows a concept presented by Thales Alenia Space. 

Credit: ESA

The exploration of planets around stars other than the Sun, known as extrasolar planets or 'exoplanets', is one of the most exciting topics of 21st century science.

One of the key goals of this research is to discover and learn the properties of Earth-like worlds in the Sun's neighbourhood.

ESA, the European Space Agency, will do this in preparing a new space mission named PLATO.

The mission's launch is scheduled for 2024, and firm discoveries of Earth-like planets at Earth-like distances from stars similar to our Sun will be produced after three years of observational data have been collected.

ESA's Science Programme Committee voted for PLATO at its regular meeting in Paris on 19th and 20th February, 2014, where it was one of five proposed space projects for a so-called "M" mission.

Not a single Earth-like exoplanet in a habitable zone around a star similar to our Sun has been found and characterized yet. PLATO will be a pioneer in finding new worlds for humanity to explore.

The PLATO Science consortium is led by Don Pollacco from the University of Warwick who comments

"This is fantastic news for Europe, PLATO will allow the first systematic survey of nearby planets for indications from advanced life forms (as well as slime)."

"A few years ago this would have been science fiction and now its coming to pass as science fact."

The UK also has major roles in the instrument itself supplying the CCD sensors (e2V Technology and UCL), much of the image processing software (Cambridge) and Public Outreach (Open University).

Heike Rauer

The PLATO mission itself is led by Dr Heike Rauer at DLR, the German Aerospace Center. "PLATO will begin a completely new chapter in the exploration of extrasolar Planets" Dr Rauer confidently predicts.

"We will find planets that orbit their star in the life-sustaining 'habitable' zone: planets where liquid water is expected, and where life as we know it can be maintained." she continued.

PLATO will measure the sizes, masses, and ages of the planetary systems it finds, so detailed comparisons with our own Solar System can be made.

"In the last 20 years more than one thousand exoplanets have been discovered, with quite a few multi-planetary systems among them", Rauer explains.

"But almost all of these systems differ significantly from our Solar System in their properties, because they are the easiest-to-find examples."

"PLATO firmly will establish whether systems like our own Solar System, and planets like our own Earth are common in the Galaxy."

This is a concept image of Plato by EADS Astrium, ESA's preferred supplier for space technology. 

PLATO, is an acronym for PLanetary Transits and Oscillations of Stars.

PLATO will find planets through the periodic dimming of the detected starlight caused by a planet orbiting in front of the star, blocking PLATO's view of a fraction of the starlight.

PLATO will also measure tiny changes in detected starlight caused by small vibrations in the host stars, performing so-called astroseismology.

Just as in seismology of the Earth, these vibrations reveal the interior structure of the vibrating body. Astroseismology allows us to learn the age of the vibrating star and the planets orbiting around it.

A new type of space telescope
ESA's PLATO is a completely new type of space telescope: it will use an array of telescopes rather than a single lens or mirror.

PLATO will use top quality cameras, and will have the advantage of observing continuously from space, without the interruption of sunrise, or the blurring caused by the Earth's atmosphere.

This will allow PLATO to discover planets smaller than Earth, and planets at distances from their host stars similar to the Earth-Sun distance.

So far, only a few small exoplanets are known at star-planet distances comparable to or greater than Earth's.

Unlike previous missions, PLATO will focus on these planets, which are expected to resemble our own Solar System planets.

European Southern Observatory's European Extremely Large Telescope (E-ELT)

ESA will take on a leading role in the search for extrasolar planets

PLATO is a lively and vigorous European collaboration, many European research institutions and hundreds of European researchers are working together, with scientists from all over the world completing the team.

The catalogue of potentially habitable planets provided by PLATO will be the basis for follow-up measurements to confirm discoveries of new planets, using the ESO's E-ELT, or the next generation of large space telescopes, like NASA's James Webb Space Telescope.

With PLATO, Europe will be leading the search for habitable exoplanets.

So far only a few exoplanets have had their mass, radius and age determined precisely. This is needed to properly describe a planet.

"The observation of planets in many different states of their evolution will give us clues for the past and the future of our own planetary system", Dr Rauer remarked.

"By no means do we know all about the youth of our Solar System."

Read the full article here

NASA MARS Rover Opportunity: Investigating Light-toned Veins in Rock Outcrop

Mars Rover Opportunity is on the inboard edge of "Cape York" on the rim of Endeavour Crater, now engaged in in-situ (contact) science investigation of veins in the light-toned outcrop "Whitewater Lake," a place the rover visited previously.

On Sol 3187 (Jan. 10, 2013), the rover bumped a little over a meter to reach the vein targets in the outcrop, named "Ortiz." On Sol 3189 (Jan. 12, 2013), Opportunity, using her robotic arm, collected a large Microscopic Imager (MI) mosaic of the vein targets.

This was followed by the placement of the Alpha Particle X-ray Spectrometer (APXS) for an overnight integration. On Sol 3191 (Jan. 14, 2013), the rover collected more MI mosaics of a target offset from the first and completed this with placing the APXS on the new target.

Opportunity started exhibiting memory symptoms this month similar to events seen with Spirit in 2009. This is not a health and safety concern, but can cause loss of some data intended for downlink.

It can be avoided for more important data by downlinking before any rover nap. The suspect cause is corruption in the flash file system used by the rover for non-volatile telemetry storage.

The project implemented a detection diagnostic on Sol 3189 (Jan. 12, 2013) to flag the occurrence of these events in separate non-volatile memory. No events have occurred since Sol 3183 (Jan. 6, 2013), and the rover remains in good health.