Tuesday, December 17, 2013

Enric Sala: Saving the world's oceans one at a time

Think of the ocean as our global savings account -- and right now, we're only making withdrawals, not deposits.
Enric Sala shows how we can replenish our account through no-take marine reserves, with powerful ecological and economic benefits.

From CNN

When Enric Sala dips his toes in a pool of water, he does so in the knowledge he may well be the first man on the planet to do so.


As he lowers himself below the surface of the ocean in his diving gear he becomes something of a fish whisperer, an underwater pied piper.
In short, marine life flocks to the pony-tailed Spaniard.
"It's an amazing experience to see fish that have never seen humans," he says.
"They come really, really close to us. That's just unthinkable where people are fishing. Normally, we're used to them swimming away from us."
"What we're doing is hard to do almost anywhere in the world. We're seeing large fish and sharks in almost every dive. People could spend years in, say, the Caribbean and see less sharks than we can in just one single dive. This latest trip has been a really, really special experience. It's so wild and we expected to see healthy reefs but not like this."

National Geographic Pristine Seas Expeditions | Underwater message

Sala is a novelty -- well, certainly to sea life -- with his passion for untouched waters as National Geographic's explorer-in-residence, whose mission is to help protect the last wild places in the ocean.
The society's "Pristine Seas" initiative has been set up to fend off the long-distance fishing fleets that have started to encroach in these remote waters.

Just 2% of the world's waters are protected, and Sala knows he has a gargantuan task ahead of him that needs massive backing by the world's governments.
Slowly but surely he is chipping away at ensuring a better future for the world's waters.
Of the eight areas he has so far visited under the program, four are now protected with a further two currently pending protection.

His most recent expedition is to New Caledonia, an archipelago that separated from Australia 60-85 million years ago, coming to rest 1,210 kilometers east, and is now a special collectivity of France at the behest of Napoleon III, who ordered his navy to take formal possession of the 18,500 km².
 A day's boat ride north from New Caledonia's most northern tip, the Waitt's Institute research vessel has, until recently, been bobbing for the last three weeks slowly on the water's surface.
A team of 12 people, made up of scientists, cameramen and crew, with Sala at the epicenter as expedition leader.
Previously an academic, he recalls: "I was studying the effects of humans on the ocean. It was so depressing. I thought saving the ocean was a lost battle but then I decided I wanted to be part of the solution, so we started the Pristine Seas project.
"Now I feel like there's hope. Now I go to these places and see what it used to be like, to see what the future could be elsewhere with regeneration."


Sala's passion for all things underwater is addictive, he talks with a childlike enthusiasm for his current expedition.
He was a boy when first captivated by the magic of the sea, inspired by the famous former diver and explorer Jacques Cousteau.
"Since I can remember, my dream was to be a diver on his boat but I was born too late for that. But now I'm getting to do something similar myself. He showed us a lot and in later years showed us what was wrong with what we were doing. I'm trying to go one step beyond that and find solutions."
So how would his idol have perceived what Sala and his team are now doing?
"I think he would have been proud of what we're doing," says Sala, who grew up on the Spanish Mediterranean coast.
"If he had lived on, I think he would have done something like this himself. But he was just an amazing man known by so many people around the world."

Sala's current quest is aimed at not just protecting certain waters but regenerating those that have been fished to within an inch of their lives.
The aim is to ensure protected areas become increasingly rich in fish and other underwater life, thereby spilling into other waters as it becomes overly abundant, thus in the long-term having a positive knock-on effect to fishermen.


But he and his team are also learning about healthy coral and reef, among other things, to learn how to help regenerate damaged varieties in other global waters.
Their days are spent diving, filming, photographing and researching.
Sala, indeed, is most at home in the ocean.
"Once in the water, all the problems on the surface disappear," he insists.
"You're in a world where you're in complete focus but also at peace. It's a world where you don't feel the strong gravity from the planet, you feel like you're flying.
"It completely changes your perspective on the world. I think it probably helps that endorphins are being released especially in these pristine places.
"Being able to experience nature, and raw nature at that, first hand is like going back in the past. On these trips, it's like I go into a time machine and go back. It's quite spiritual."

Sharks have become synonymous with fear in the sea, thanks in part to Steven Spielberg's "Jaws" film with John Williams' ominous stringed musical buildup to each unwitting victim of a shark attack.
But Sala's experience of the underwater predators has been the complete antithesis.
"Every moment is wonderful, like spending just one dive following clown fish for the whole dive," he says. "All the animals are special but the most special are sharks.
"They are just so beautiful and elegant in the water. They're perfect in their environment and their shape has not really changed in 300 million years.
"They are also great for the health of the reef, and the idea that they are dangerous is wrong. They have a bad reputation but in my five years doing this, diving sharks, I've not had one problem. I've never once been threatened by sharks."

His long-term aim, and that of National Geographic, is to protect 20 seas in total. So how exactly can you protect large swathes of water?
"It's become much easier as governments who we've worked with pass laws limiting the areas that can be fished," he explains.
"Obviously some of these are in remote waters so the best way to do that is via satellite. For example in New Caledonia, we found out that the French Navy had intercepted an illegal Chinese fishing vessel. Having a naval presence is also a great deterrent."
Next on his tick list is Mozambique in April.
Slowly, sea by sea he is clearing up the planet's waters, and he is determined to continue.


Monday, December 16, 2013

Real-time world winds animated map

A visualization of global weather conditions forecast by supercomputers updated every three hours
created by Cameron Beccario (project under MIT license)
animated picture : Dan Stuckey 

This 'real time' app shows wind speeds...and among several map projections.


Above: wind velocities at an altitude of 5,000 meters atop an Atlantis projection


Weather Data | Global Forecast System (GFS model) : NCEP / US National Weather Service / NOAA
(simple bilinear interpolation to fill the gaps)
(with GRIB Decoder | UCAR/Unidata THREDDS)
Geographic Data | Natural Earth
Inspiration | HINT.FM wind map

1000 hPa | ~100 m, surface conditions
 (zoom view via double click)

The "earth" button also offers some options – changing the height (parameterized by pressure: e.g. the high-altitude 10 hPa pressure winds are more uniform, stronger, and red, purple, or even white if too strong), projection of the terrestrial sphere, changing the reference time (yesterday, forecast for tomorrow with date and time in the URL : earth.nullschool.net/#2013/12/18/0600Z/), UTC vs local time, visualizing your current location (a "cross" closes the local info), and more.
Left-clicking a place (with no dragging) gives you some local wind speed and direction information about the place.

Atmospheric pressure corresponds roughly to altitude
several pressure surfaces are meteorologically interesting
note: 1 hectopascal (hPa) ≡ 1 millibar (mb)

so other layers :
  850 hPa | ~1,500 m, planetary boundary, low
  700 hPa | ~3,500 m, planetary boundary, high
  500 hPa | ~5,000 m, vorticity
  250 hPa | ~10,500 m, jet stream
    70 hPa | ~17,500 m, stratosphere
    10 hPa | ~26,500 m, even more stratosphere

 to beyond the stratosphere : the winds are fast, loopy and quite strange.


Strong Storm in China, Korea and Japan this week-end illustrated by the new viewer

Links :

Sunday, December 15, 2013

Amazônia Manauara


A dive into the mysteries and beauty of Manaus, the capital in the heart of the Amazon.

Links :
  • YouTube : Earth from Space (ESA) : Amazon 

Saturday, December 14, 2013

Book Review: Global warming and oceans, a 21st century perspective

Ocean Circulation and Climate belongs on every climate geek's holiday wish list

From The Guardian

A new book summarizing much of what we know about oceans and the role they play in shaping our Earth's climate was just published.
For researchers like myself, we often become fixated with learning the newest facts or reading the latest studies in our fields.
Every so often, however, it is necessary to take a step back and provide a retrospective look at how our knowledge has developed with time.
Such a retrospective was just provided by some of the world's most qualified oceanographers. It is an update to a legendary text that was first printed in 2001. 


This is the second edition of "Ocean Circulation and Climate – Observing and Modelling the Global Ocean" published in 2001 at the end of the World Ocean Circulation Experiment (WOCE).
During the 1990s WOCE built on the availability of a new generation of altimeter satellites and carried out the first global scale study of the role of the oceans and their circulation in earth's climate. WOCE's primary objective was "to develop models useful for predicting climate change and to collect the data necessary to test them".


Since WOCE there has been enormous further progress both on ocean observations and modeling.
The Argo array of profiling floats (a technological development started during WOCE) now routinely monitors the temperature and salinity of the upper ocean.
The series of altimeter satellites continues.
These strands now allow a better understanding of the inherent variability of the ocean not available in 2001.
In parallel, the relentless increase in computational power permits better representation of crucial ocean processes.
The new book has been produced simultaneously with the preparation of the 2013 IPCC WG1 5th assessment report and provides useful and up-to-date background on ocean-related issues central to the IPCC's assessment.

The remarkable progress in this area of ocean science since the turn of the century means that many of our present-day modeling and observational capabilities could only have been dreamed about in the 1990s.
Thus the book, subtitled "A 21st Century Perspective", is both timely and important.
It contains 31 chapters that span the present state of knowledge
The 78 authors provide a truly international perspective as recognized experts in their respective fields.
Eight were also authors of the IPCC WG1 AR5, which was released this fall, including Thomas Stocker (Chairman of WG1) who wrote the first chapter, "The Oceans as a Component of the Climate System".

Three of the editors, Gerold Siedler (Germany), John Gould (UK) and John Church (Australia), were editors of the first edition and were joined by Stephen Griffies (USA) to provide additional expertise on modeling.
All are internationally recognized experts in their respective fields.

The introduction provides a great justification for the text,
"Were it not for the ocean's ability to absorb substantial amounts of heat and carbon, the effects of worldwide anthropogenic climate change would be much larger. The ocean is therefore already an important mitigating element in the Earth System"
As a part-time ocean scientist myself, and a self-described ocean nerd, this may be the first item on my Christmas list.

Friday, December 13, 2013

The oceans are vibrating with humanity's 'background hum'

The above map shows a simulated spectrum at 100 Hz

From The Atlantic Cities (by John Metcalfe)

There are fewer and fewer places nowadays where one can escape the sound of humans.
These sanctuaries of precious quiet do not include much of the ocean, which is constantly thrumming with civilization's noise pollution.



The bulk of human-generated audio in the seas comes from large shipping vessels, according to a NOAA working group on marine noise.
For a while now the U.S. government and other concerned groups have investigated the possibly harmful impact underwater noise might have on marine life – especially cetaceans like whales and dolphins that use sound to communicate.
Thanks to one of the parties involved in that effort, we now can visualize how our massive seafaring machines are creating raucous house parties in the northern Pacific and Atlantic, in a cluster around Europe, in busy Middle Eastern shipping routes and many other regions of intense clamor.

These two maps of merchant-shipping commotion were shared by Michael Porter, a participant in the NOAA group who is also president of Heat, Light, and Sound Research in La Jolla, California.
They represent differing levels of noise in the oceans during 2006 at a depth of about 650 feet, which sound like low-frequency hummmmms that travel hundreds of kilometers.
Porter and his team assembled these models as a way to distinguish shipping noise from other background sources, such as sonar and pile driving.
this one is for 200 Hz (for the difference between these two, see Porter's explanation below

Porter took the time to answer a couple questions about this probing of the oceans' aural landscape; here's what he had to say:

What are the effects of boat noise on the ocean ecosystem? Is it mainly potential harm or harassment to animals?

There is a worry about such noise as a 'pollutant'; however, one should be very careful about jumping to that implied conclusion (that it is causing harm).
We prepared these maps originally in the context of a NOAA effort to provide the background levels against which other sources (e.g., pile-driving noise) might be compared.
We view it as a sort of background hum that you might compare to highway noise.
You will find scientists that think it's obvious that this sound harms the animals and scientists that think it's very unlikely.
Scientists, of course, are human also and not immune to hasty, emotional conclusions.
In truth we simply do not know if they are bothered by this noise field.
However, these soundscapes can help inform the research process.


The main interest here is on how it might bother animals or how other sound sources that might be even more bothersome compare to this pervasive background field.

Where are the noisiest places that you found? Are they typically near major port cities, or elsewhere?
At this stage, I don't have too much to say about the noisiest places.
The map itself answers the question fairly completely if we're talking just about ship noise: the loud places are generally near the shipping lanes.
However, we see high levels, for instance, in the Gulf of Mexico where there is a lot of seismic exploration (not shown on the shipping-noise map).
We also see high levels in areas where there is pile driving or, separately, Navy sonar exercises.
That statement should be footnoted with the observation that the measure of 'high levels' depends on the metric.
Shipping is always on; pile driving and sonar are not.

Is there any effort being made to cut down the levels of ocean noise around the world? If so, who's making it, and how?

There is a lot of popular concern about the effects of sound on the marine environment.
In particular, there was a major public outcry following the stranding of 16 whales during the Bahamas incident.
The U.S. Navy did an extensive study and concluded that their sonar was a likely cause.
There have been other incidents.
Similarly, there was a great deal of public concern following significant fish kills associated with pile driving for a bridge near San Francisco.
To provide context, one should also consider the roughly 1 million animals that are 'bycatch' in the fishing industry.
We don't have a strong position about whether this is a serious issue; we merely seek to provide information for bioacousticians and conservationist to assess the issue.

Do you know of any ports or governments that have sound-dampening programs?

The European Union has developed a Marine Strategy Framework Directive and considerations about ocean noise are part of that directive.
As a result various countries in the EU are taking steps to assess or mitigate marine noise.
I'm not intimately familiar with the U.S. process but NOAA and BOEM are closely involved in permitting of Navy exercises and seismic activities and noise studies are a major concern.
The U.S. Navy, for instance, does enormous studies to forecast 'takes' of marine mammals associated with Navy exercises.
However, the word 'take' here suggests something extreme but actually includes almost any observable effect.

 
What's the difference in meaning between the 100 Hz and 200 Hz maps?

It is often a challenge to express this sort of info for a non-technical audience.
I would say that 100 Hz is a tone that would correspond to a key on the left half of a piano and 200 Hz is exactly one octave higher but still to the left of middle C (about 260 Hz) or A440 (440 Hz).
The sound level is presented in "third-octave bands" so the plot for 100 Hz is really showing the sound level that would be heard by a listener who could only hear a third of an octave around that 100 Hz tone but was deaf to notes outside of that.
This could sound like an odd way of presenting things but it allows a scientist to understand the noise in relation to a wide-variety of species of animals that may be able to hear in different bands.

Links :
  • GeoGarage blog : Stemming the rise of a sea of noise
  • Scripps : Research Highlight: Turning Down the Noise