(What marine mammals have to do with gas exploration and how can you help?)

Biking is cool for so many reasons.

Benefits-of-biking

 

 

 

 

Besides all the personal benefits, mainly related to health advantages and financial savings, there is also an immense ecological value to it. Since bikes run on fat (of the person that rides them) instead of oil, it has zero emissions of CO2 to the atmosphere, hence reduces one’s carbon footprint to the planet. In addition, it directly diminishes the road kills and helps save the animals. Interestingly, the choice of being on two wheels than four it does not only protect the four-legged friends of ours but also the no-legged, big brained, wet and mysterious marine friends of ours: the whales! Feel free to find this slightly overstretched but bear with me and I will unfold this connection for you.

Biking works without consuming fossil fuels and for this reason it can affect procedures and the market of oil and gas operations. In contrast to what some people believe, our everyday choices and behaviors can actually change/save the world.

Change
You are more influential than you think

If you care, you can actively contribute to fossil fuel consumption and affect the correspondent impacts. Besides the joy of biking, this is the focus of this post: you save money on fuel and save the earth from having its intestines removed.

Oil makes the world go round

It has been estimated that about 130 billion tons of crude oil have been extracted from the ground since commercial drilling began (1870). According to the Institute of Mechanical Engineers, there are still 1.3 trillion barrels (1 barrel~160 liters) of oil reserve left in the world’s major fields (Saudi Arabia, Iraq, The United Arab Emirates, Kuwait, Iran) which at present rates of consumption should last about 40 years. Humanity has managed to use in just about 150 years a resource that took probably up to millions of years to form! About half of this amount has been consumed in the last 25 years.

Wait a minute, how old are you. Hmmm, did you do it?

Needless to say that the oil deposits are not distributed homogeneously around the world. Also remember that are not consumed equally by everyone either. The world’s 2/3 of the remaining oil deposits are, as you correctly guessed, in the Middle East. The United States has only 4% of the world reserves but consumes over 25% of the oil consumed worldwide and ends up importing more than half of its supplies.

At this point exactly, I am being antsy for political comments and discussion, but since this is not the appropriate platform, I will limit myself to let you think about the sacrifices that a person (usually without realizing) or a government (always consciously but trying to mask it) are willing to make to get access to the oily wells.

#1 (and the only one discussed here) sacrifice: the ecosystem

The carbon emissions by burning petroleum is contributing to the greenhouse effect that affects our climate that in turn has gone bonkers. Intense and extreme weather conditions seem to occur and new historic records of high or low temperatures are being broken almost every year in many parts of the world, including Alaska and the East Coast of United States correspondingly.

Our greed for black gold has taken the geoscientists and the oil companies to the oceans. In the USA, Alaska has been the target for oil exploration, where a vicious circle is taking place. Since the industrialization and the burning potato of climate change occurred, the ice is melting with higher rates, the glaciers’ volume decreases, and land or part of the ocean that before were inaccessible are now exposed. What an opportunity has risen! We can now drill for more oil to burn, emit more CO2 and enhance the rapid ice melting.

Do we want to ride this carousel?

In addition to the oil industry horror that took place in Alaska and the Gulf of Mexico before, the most current USA oil hunt has now taken oil companies to the Atlantic. I will explain more about this in a bit.

It is clear that the Exxon Valdez oil spill in Alaska (1989) and the Deepwater Horizon explosion in the Gulf of Mexico (2010) were accidents during the extraction and the transportation of the oil. The impacts were obvious to everyone with dramatic images of black seas, tarred beaches, sea birds covered in thick oil, and dead baby dolphins stranded on the coasts that blackened everyone’s heart.

00c1ftdr

Before even the pumping of oil from the Earth’s guts begins, other risks for the environment are underlying that are not obvious to everyone and are hard to identify.

The oil is buried deep below the ground and the ocean floor. How do you find something so well hidden? The geoscientists’ secret weapon is called airgun and it is exactly what its name says: a gun that shoots air.

Are the guns of air innocent as they sound?

The seismic airguns used for oil and gas exploration are NOT the same as the ones that we add soap and water and make bubbles filled with air, wouldn’t that be nice? Instead, they blast compressed air, waves of energy, in to the ocean floor to use the echo and take an image of what it is beneath it. Each layer within the Earth reflects a portion of the wave’s energy back and allows the rest to refract through. These reflected energy waves are recorded and their differences in arriving time can tell us about the different materials in the ground where the sound has different speed. The general principle is based on the technique of echolocation that bats, dolphins and sperm whales use. They send waves of sound that bounce off objects, go back to their ears and give an acoustic picture that can be as high definition and detailed as an x-ray.

For the seismic exploration as is called, hydrophones are used as the ears that listen and record the echo of the sound. Similar hydrophones to what I use to listen and record the voices of the whales.

Boats tow large arrays of airguns that shoot energy waves strong enough to penetrate the sea bottom and travel miles into it. These airguns can be so loud that resemble dynamite explosions, are repeated about every 10 seconds for whole days and often periods of months.

Image61
How to take underground “photographs”

 

Now imagine yourself living in a town that is bombed all day every day for months.

A deaf whale is a dead whale

The oceans are “worlds of sound” and marine mammals count on sound and their acoustic as well as vocal abilities to communicate with each other, find mates, locate food and navigate. Can you imagine the impact of these explosions to their lives?

Depending on their proximity to the operating airguns, whales can be physically harmed, deafened, or can alter their behavior, leave the area and move miles away to avoid the noise or temporarily lose their ability to hear. This intense noise can mask acoustic signals that come from other animals and hence interfere with adult breeding calls, or degrade anti-predator responses. Mothers and calves use sound to communicate underwater hence such loud noise can increase the risk of calves being separated from their mothers with lethal effects. The sounds from the airguns are loud enough to disrupt activities of blue and other endangered marine mammal species essential to foraging and reproduction over vast ocean areas. Over time, airgun noise can cause chronic behavioral and physiological stress, just like intense noise pollution can cause to people, that can suppress reproduction and increase mortality and morbidity. Not good.

Make a change

Currently, there has been a reaction to the USA federal government for having released a map with the areas where oil companies want to look (hear) for oil. Regulations for surveying in the Atlantic were finalized last summer, while this January a proposed plan for offshore drilling was released. It is a humongous area on the East coast and includes the habitat for a variety of marine mammals, including the 500 remaining critically endangered Northern Right Whales. Thanks Obama!

Even if seismic can mask the voices of whales they cannot shut down our voices.

Do you want to help?

You can be part of the social media campaign designed at getting out the facts about seismic exploration and urge the Obama administration to reverse the decision to allow seismic surveys for oil and gas in the Atlantic.

For more info you can read here the  letter to the Bureau of Ocean Energy Management expressing concern over the introduction of seismic oil and gas exploration along the U.S. mid-Atlantic and south Atlantic coasts (sent on 3/5/2015.) and here the letter to President Obama urging him to wait on new science before permitting the use of seismic airguns in the Atlantic Ocean (sent on 2/20/2014.)

Here is what you could do to be part of this:

  • Print out the sign and fill in your name and affiliation/position.
  • Take a picture of yourself holding the sign. It reads:

“Seismic airgun exploration for oil and gas puts marine life at risk of serious harm.”

Send the photo to: npyne@oceana.org

Should be something like this:

Make some sound without speaking

It is not just USA being thirsty for oil though. I am recently working on the Environmental Baseline Study for two locations in the Ionian Sea in Greece that got approved for oil exploration and drilling. Ionian Sea is a significant habitat for eight marine mammal species with critically endangered, endangered and vulnerable species among them. The sperm whale, monk seal, common dolphins, bottlenose dolphins and beaked whales are intensively using this area and are particularly sensitive to noise. My responsibility at this point is to make sure that the current presence of these species is carefully recorded before the exploration and operations start so that potential impacts can be evaluated after that.

The same time I have been working on the Strategic Environmental Impact Assessment for the construction of offshore wind farm in 11 locations in Greece. Alternative and renewable energy resources are certainly the direction we should globally be looking towards. However, it is interesting to know that potential negative impacts can also occur to marine organisms during their construction and operation. For this reason, the mitigation measures are of great importance and I expect them to be taken into account.

One more reason that we love biking is that it is quite as a squirrel. Imagine how much more peaceful this world would be with more bikes and less cars. This paradise exists in the micro-cosmos of OSU campus. We are lucky people the Corvallis people. If it can happen here, it can happen everywhere.

Your turn Athens.

superman picture add cape?
Be your own hero

 

Oscar Wilde said that “Conversation about the weather is the last refuge of the unimaginative.”

Sorry Oscar, despite my deep respect and admiration to you I will have to object this one.

Talking about the weather is lame; I seriously thought before. But I have changed my mind, since I moved to the Oregon Coast. Talking about the weather is lame at the cases that the weather is consistent, predictable and largely warm and sunny. This is not the case at the Pacific Northwest.

The variability of the weather at the Oregon Coast
The variability of the weather at the Oregon Coast

I often find myself complaining about the weather (this is my version of talking about it) since I moved here, and now it’s time to better look into it. Without my usual pout when I curse the rain, or my frown when it’s sunny but really windy. I am not grumpy in reality; I am just a bicycle commuter. That means that I don’t have the choice of a well heated, or at least a dry seat at bike-unfriendly times. I am always exposed to the weather and it affects me every single day. I have been repeatedly soaked by the North Pacific rain and blown away by the Northerly winds (we name the winds from the direction that they come from) over and over again. Immediately when I arrived here I was warned about the horizontal rain that I had never heard of before and no umbrella could keep it off me. The wind is ruthless at the North Pacific.

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The truth is that everyone is affected by the weather and has his/her own relationship with it depending on where they come from, what they are used too and how their internal thermostat is tuned, and also on their personality. If you come from Greece, the Oregon Coast will appear cold, whereas if you come from northern France (clear reference to one of my housemates) it will feel like home. If you are outgoing and social the warm sunny weather suits you and defines you. If you are more of an introvert the rain and the low temperatures will provide the right conditions for you to stay home and enjoy solitude.

Research shows that the weather and particularly the sun affect our mood. I clearly see more smiley faces in a sunny day, mine included. Studies indicate a link between low pressure and suicide. On rainy days people report lower satisfaction with their lives. Now imagine how challenging it can be to be a graduate student in a tiny town on the Oregon Coast…!

Overall, I think that the amount of energy that we receive from the huge flaming star on the sky defines who we are, and seems to be a driver of peoples cultures. I am certain that you also have noticed generic cultural differences among people that come from southern and northern regions in a global or even in a national scale. I might be judged for stereotyping but there is some truth to that.

There are 3 major factors why the weather is important for biologists-acousticians:

1. It is linked to food and everyone cares about food

The animals care about the weather! Their distribution is defined by the climate together with other parameters. The sperm whales for example, being truly cosmopolitan, are encountered in the most parts of the world’s seas from the equator to the edge of the polar ice. However they have their temperature preferences. The females like it warm and don’t go to temperatures lower than 15°C. While the groups of females and young males are thought to remain in lower latitudes year round, the macho adult males have wider physiological demands and are encountered in polar areas.

The sperm whales display a remarkable sexual dimorphism with the males being ~1.5 times longer than the females. The larger the size of the animal the more favorable is the surface-to-volume ratio. Even though they have a large surface area that they lose heat from, this area is small in relation to their heat-producing body mass. Thus the males can migrate to high latitudes, especially during summer months, to productive feeding grounds where they karaoke with my hydrophone located at the Gulf of Alaska.

A whale enjoying our field work!
Some enjoy field work more than others

Within their calls I am sure that whales talk about the weather too because highly productive spots are identified, like upwelling areas and other cool places where plenty of food is available and the animals tend to aggregate. Though, the precise process that links the environmental factors in the open ocean with the distribution and abundance of large predators is difficult to be determined and is a major goal of my research. Investigating the oceanographic parameters that affect the movements of sperm whale populations is a particularly complicated matter since they feed on deep sea creatures (bathypelagic squid) and the linkages of physical forcing (wind, temperature) with primary productivity and aggregations of prey and predators are temporally and spatially variable.

2. The sound in the ocean likes it hot

The propagation of sound in the oceans is largely affected by oceanographic variables (which are related to the weather) such as temperature, pressure and salinity. The speed that the sound travels underwater varies from area to area, season to season and different time in the day. Generally the sound speed increases when all the above variables increase. Since these variables change with the depth, the sound speed profile also changes with depth in the water column.

Temperature, Salinity and pressure ocean profiles at mid-latitudes
Temperature, Salinity and pressure ocean profiles at mid-latitudes

 

sound speed profile at mid latitudes
sound speed profile at mid latitudes

High sound velocity on the sea surface where the water gets warmed up by the sunlight decreases down to the depth where the water temperature becomes constant (~1000m) and then it starts increasing again when the pressure increase is dominant. At the transition point where the sound velocity reaches a minimum (~1000m) it is formed a sound channel where sound waves get trapped and propagate really far away. This is named as the SOFAR (SOund Fixing And Ranging) Channel and some species of whales find it to be very useful to communicate with their friends, partners, parents, cousins and aunts that are immigrants to faraway seas.

colorful figures with boats are always better
colorful figures with boats in them are always better

I use skype.

message to self: SOFAR channel
message to self: use SOFAR channel

 

 

 

 

 

Do remember this SOFAR chitchat when you decide to deploy your instrument to record whale voices and you cannot decide on the depth 😉

And to turn the talk-about-the-weather into a hot topic, consider what happens when climate change is introduced and the small talk becomes a conversation where personal ethics, political and social opinions are involved. More like loud talk now! Now that I said loud, did you wonder what is the effect of climate change to the sound propagation and consequently the whales’ communication, and you were afraid to ask?

Ocean acidification, the decrease of the pH in the seas, is a notorious climate change impact. This increase of the ocean acidity changes how sound travels underwater: the lower the pH (more acidic), the ocean absorbs less sound and the higher is the sound speed. And now you are thinking: “Voila, the whales can be heard even further now!”. However, the reality is less comforting (as usually). At the frequencies that the whales vocalize we make a whole lot of noise with shipping and naval activity, seismic exploration and other significant anthropogenic sound sources that interfere with the whales’ skype and consequent communication issues. Yep, ocean acidification makes the sound pollution in the seas into a magnified problem.

3. People love listening to the rain

Since the weather affects the ocean soundscape, then it can also be measured by the sound it makes! Rain and wind generate sound at the sea by producing bubbles during splashing at the ocean surface. These physical processes create different distribution of bubble sizes that have a different footprint on the soundscape. This way the sound from breaking waves (caused by the wind) can be distinguished from the rainfall sound and we are able to monitor the ocean surface conditions from below the surface. Huzzah, here is the solution to trying to measure wind speed and precipitation in difficult locations where the measured vicious weather elements can actually destroy the instruments that we use to measure them. The instrument that I use, the Passive Aquatic Listener (aka PAL) was originally designed by Dr. Jeffrey Nystuen  to detect and measure rainfall and wind speed at sea. Lucky me, it works great with recording marine mammals too!

Weather and bubbles talk. This is so scientific.

By this point of this post I have been unnecessarily negative with the Oregon Coast weather which to be frank is what makes this corner of the world into a magical place. The northerly winds in the summer are the reason for the upwelling  to take place and all the whales and other astounding marine life to move up this way for food. Seeing the whales from the beach or even just the balcony of your house is certainly worth suffering some cold winds. The world we live in is alive because of the winds. The wind is the breath and the heartbeat of the Earth. The rain on the other hand gives life to thriving and fairytale-like old-growth forests with splendidly diverse and abundant wildlife, fills the rivers and the lakes. Did I mention how outdoorsy I have become?

A question to you: do you also see an irony in the name “Pacific” or I am being grumpy again?

I am not grumpy at the Oregon Coast
I am not grumpy at the Oregon Coast

Here it comes, a welcome wind: the wind of change. I am moving to the valley!