NOAA Teacher at Sea
Brett Hoyt
Onboard NOAA Ship Ronald H. Brown October 8 – 28, 2006
Mission: Recovery and maintenance of buoy moorings Geographical Area: Southeast Pacific, off the coast of Chile Date: October 16, 2006
Weather Data from Bridge
Visibility: 12nm (nautical miles)
Wind direction: 060º
Wind speed: 10 knots
Sea wave height: 3-4ft
Swell wave height: 5-6 ft
Sea level pressure: 1020.8 millibars
Sea temperature: 19.3ºC or 66ºF
Air temperature: 19.1ºC or 66ºF
Cloud type: cumulus, stratocumulus
We are going to use a different format for today because it is Deployment Day! Today was deployment day for the entire crew and the best way to tell this story is in pictures. So let’s begin.
Before scientists deploy a buoy they must measure how deep the ocean is. This is the actual bathymetric (bottom measure) read out of the target site for Stratus 7.This is the map of the bottom of the ocean. Please note the scale in meters on the left as well as + marks the spot. Can you see the pattern the boat is making?With over 4,400 m (13,000 ft) of cable it takes a full crew to stage the cable.Jeff Lord making final preparations for the dozens of instruments to be deployed beneath the buoy. What an amazing man. “What would we do without you?”Lifting the Stratus 7 Buoy off the ship. This process takes the cooperation of about a dozen individuals to do.Stratus 7 off the side ready to have the instruments deployed under it.Jeff attaching a current meter (Invented and patented by Dr. Weller) to the bottom of the buoy. It weights about 160lb and there are eight of them. Please note the safety equipment Jeff is wearing. SAFETY FIRST!Dr. Weller operating the winch (it has over 2.5 miles of cable on it!) and supervising the deployment operation.Attaching glass balls (they are located inside the yellow plastic housings which protect them from chipping), which are at the very end of the 13,000 feet of cable just above the acoustic release, which in turn attaches to the anchor. These hollow glass balls can withstand pressures in excess of 5,300 lb/sqin.This is the acoustic release (actually two) that attaches the buoy mooring line to the anchor. One year from now an acoustic signal will be sent down 13,000ft to trigger the chain to be released. The reason they use two is that if one fails the release will still take place and the mooring line will begin its ascent to the surface with the help of the glass balls.Everything is just moments before release. This anchor weighs 9,000lbs and will take over 45 minutes to fall to the bottom of the ocean. All the instruments are attached, glass balls secured, and the acoustic release in place. Drum roll please…………………. The anchor is deployed!Stratus 7 on station in the South Pacific Ocean helping scientist understand this big blue planet we call home.
NOAA Teacher at Sea
Brett Hoyt
Onboard NOAA Ship Ronald H. Brown October 8 – 28, 2006
Mission: Recovery and maintenance of buoy moorings Geographical Area: Southeast Pacific, off the coast of Chile Date: October 15, 2006
Dr. Robert Weller sitting on the aft deck
Weather Data from Bridge
Visibility: 12nm(nautical miles)
Wind direction: 110º
Wind speed: 11 knots
Sea wave height: 2-3 ft
Swell wave height: 3-5 ft
Sea level pressure: 1016.8 millibars
Sea temperature: 18.6ºC or 65 ºF
Air temperature: 18.2ºC or 64ºF
Cloud type: cumulus, stratocumulus
The Scientists
Today we will visit with Dr. Robert (Bob) Weller. Dr. Weller is the lead scientist for this scientific cruise and upon whose shoulders the success or failure of this expedition rests. Dr. Weller is an easy going, soft-spoken, easy to approach, modest, and very intense man with a passion for understanding the climate of the earth and all the processes within it. Many times scientist possess a great mind for academic excellence yet they fail at relating to people. Dr. Weller is the exception, possessing a brilliant mind, keen insight and intuition, and superb people management skills. It is exactly these qualities that have enabled him to lead such important and ground breaking research on climate and climate studies He understands that the success of a cruise depends on getting people (sometimes of various nationalities, on our cruise five) to work together to accomplish great things.
The Stratus 7 Buoy on station in the South Pacific just after being deployed
Dr. Weller began at an early age to feel the pull of science. He entered college initially to be a biochemist but something happened. In the middle of college he accepted a job with an oceanographer and from that time on he knew that a new career was in order. He graduated in 1972 with a degree in engineering and applied physics. He continued on and five years later in 1978 earned his doctoral degree in oceanography.
Upon earning his doctoral degree he accepted a position working at the prestigious Woods Hole Oceanographic Institution. He has been there ever since. How many people do you know who have stayed at the same job for 28 years! Dr. Weller finds himself at sea 2-3 months out of the year. He is a self-described scientist who likes to do things “hand on” (he’s not afraid to get dirty–please see the photo of him on deck and in his hard hat). When I asked him how long he has been a lead scientist he modestly replied” I don’t know if I’m there yet.” When I asked him what one message he would like to send to you future scientists he stated “ Kids and future scientists should be less concerned about outer space and more concerned about the planet we currently live on”. He wants kids to think about the things you can do about the temperature of the oceans and the role they play in the wellbeing of our planet we call home.
The anchor for the buoy
The Machine
Today we will examine the reason we all went to sea, the Stratus 7 Buoy. This buoy sends real time data from a fixed location off the coast of Chile. The buoy system maintained by the Woods Hole Oceanographic Institution (WHOI) out of Woods Hole Massachusetts plays an extremely critical role in understanding weather patterns that have worldwide implications. These buoys are highly sophisticated weather and climate data-gathering stations. The data collected from these stations is used to check the accuracy of powerful computer simulations that are used to predict climate change.
The Stratus 7 buoy replaces the aging Stratus 6 buoy that has been on station for over a year. There has been a Stratus buoy in this location since 2000. Dr. Weller stated that in years past buoys would not be on station for years at a time but rather for days at a time. Most did not exceed 40 days. Through trial and error, research and innovation, the life at sea for a buoy has been extended into the years. Concerned about waste and pollution in the oceans, most buoys are serviced, refitted, and given a new life year after year. Some might wonder about the cost, sometimes in excess of $1million dollars, of the buoy programs. The economic payoff is immense. It is buoys like these and the data that they collect that help scientists predict the absence or presence of El Nino. This has a huge and direct agricultural impact upon coastal states and to a lesser degree states far removed from the oceans. Do you have droughts or floods out of the norm in your area? The cause could be ocean related.
Hundreds of pounds of chain!
The Stratus Buoy can make the following measurements: -precipitation -wind speed and direction -air temperature -relative humidity -barometric air pressure -long wave radiation (radiation given off by a hot body) -short wave radiation (incoming energy from the sun) -sea surface temperature. The buoy not only transmits this data real time but also stores much more detailed information on flash cards. These cards are collected and taken back to the laboratory for further study. In addition to all the above surface instrumentation there is over 5,000 lbs of sub surface measuring instruments. These include current velocity, salinity, and temperature. These instruments are located at various depths down to 2,500ft. For example there will be 8 current velocity-measuring instruments at 8 different depths.
Cool facts
-You probably wonder how this million-dollar instrument is powered. Wind, solar, high powered lithium batteries, nope none of the above. It is powered by 1,650 D cell alkaline batteries. Exactly the ones you would use in a flashlight in your house.
-The mooring line (the line connected to the anchor) will be over 12,000 feet long
-The anchor is a cast iron weight that weighs over 9,000 pounds. -This anchor will take over 45 minutes to make it’s journey to the bottom of the ocean
-The buoy will have over 5,000lbs of instruments hanging from the bottom of it
The Experiment
There is no direct experiment with the stratus buoy. The data collected by it is used by scientists world wide to generate new ideas, hypothesis, and conclusions. As stated earlier this data is used to help climatologists improve computer models and check them for accuracy.
Dozens of instruments to be deployed directly beneath the buoy 800 meters worth that’s over 2,400 feet of instruments!
Classroom Activities
Elememtary K-6: Items needed- Styrofoam cup or similar floating device, small piece of string and a metal washer some rubber cement or other flexible glue, some round toothpicks and a large tub of water. Have the students decorate their cup using markers, plastic straws, aluminum foil, or anything else that the kids might think would make their buoy look scientific. Put the string through the bottom of the cup making as small as hole as possible (the point of a compass or the toothpicks work well) tie the string to a toothpick on the inside of the cup and let the toothpick rest on the bottom inside the cup. Place a small dab of glue on both the inside and outside of the string to keep the water from entering the cup. With the string dangling from the bottom outside of the cup tie on the washer or other object for weight. Ask the kids what scientific information their buoy collects.
Middle School:
Items needed- volt-ohm meter, glass beaker, two small copper wires, 500ml of distilled water, and some common table salt.
Salinity of the oceans seawater is of concern to scientists and is one of the tests conducted by the Stratus 7 Buoy. The way scientists test for salinity is called a conductivity test. That is they measure the conductivity of seawater. Have the student pour 250ml of distilled water into a glass beaker. Place two small copper wires on opposite sides of the beaker and submerged in the water. Be sure that at least 1cm of wire is exposed copper and in the water. Set the voltmeter to ohms and get a reading and record it. Add .5 grams of salt and mix well. Test the conductivity again. Keep adding salt in .5-gram increments. Does the readings change? If so how? Are the numbers getting larger or smaller? If so why?
High School:
Items needed- volt-ohm meter, glass beaker, two small copper wires, 250ml of distilled water, and some common table salt, and sugar.
Salinity of the oceans seawater is of concern to scientists and is one of the testes conducted by the Stratus 7 Buoy. The way scientist test for salinity is called a conductivity test. That is they measure the conductivity of seawater. Have the student pour 250ml of distilled water into a glass beaker. Place two small copper wires on opposite sides of the beaker and submerged in the water. Set the voltmeter to ohms and get a reading and record it. Add .5 grams of salt and mix well. Test the conductivity again. Keep adding salt in .5-gram increments. Does the readings change? If so how? Are the numbers getting larger or smaller? If so why?
Now run the test with sugar. What are your results? Was there a change? Now change the temperature of the solution by heating or chilling with ice. Does this make a difference in your readings?
Lead a class discussion on what each instrument of the stratus buoy does and why it is important to scientists.
NOAA Teacher at Sea
Brett Hoyt
Onboard NOAA Ship Ronald H. Brown October 8 – 28, 2006
Mission: Recovery and maintenance of buoy moorings Geographical Area: Southeast Pacific, off the coast of Chile Date: October 13, 2006
This is a Sea Surface Drifter. The students of Burlington Elementary School in Billings Mt adopted it, deployed off the coast of Chile
Weather Data from Bridge
Visibility: 12nm (nautical miles)
Wind direction: 160º
True Wind speed: 7 knots
Sea wave height: 0-1ft
Swell wave height: 5-7 ft
Sea level pressure: 1015.1 millibars
Sea temperature: 20.7ºC or 69.2ºF
Air temperature: 21.0ºC or 69.8ºF
Cloud type: cumulus, stratocumulus
The Scientists
We will not highlight a scientist today, as the star of our show is the floats and drifters.
The Machine
Today we will examine the Argo Floats and drifters. The two machines do basically the same measurements but in different layers of the ocean. The drifters that we are deploying during the Stratus 7 cruise measure sea surface temperature (SST) and transmit that temperature and their location as they drift with the upper ocean currents. This tells scientist how warm or cold the water is and how the currents in the ocean move about. The reason scientists use drifters is that even though satellites are fairly good at acquiring sea surface temperatures some, at present, cannot penetrate cloud cover and all need the drifter data to improve their accuracy. By using the hundreds of drifters scattered throughout the globe, scientist can use this data to improve the current computer models of global climate condition and get real-time data to use in their work.
This Argo float will spend most of its life in the very deep ocean (up to 6,000ft deep) and come to the surface every 10 days to send off its data. It weighs about 30 lbs.
Argo floats lead an active life traveling very little compared to surface drifters. The reason for this is that floats spend most of their time in extremely deep and very slow-moving ocean waters. Some deep ocean water takes thousands of years to make their cycles through the oceans systems. These floats descend to about 1,500m to 2,000m (approximately 4,500ft to 6,000ft) and every 10 days a bladder inflates and it rises to the surface taking measurements along the way; at the surface it transmits its data back to the scientists thousands of miles away. These floats are built to last about 4 years.
The Experiment
No experiment with the drifters and floats.
Classroom Activities
Mr. Hoyt and Jeff Lord are examining a drifter adopted by the Burlington Elementary Research Team (B.E.R.T.). We all wish BERT a pleasant journey as he travels the Pacific Ocean.
Elememtary K-6:
Since measuring environmental temperatures is one of the primary functions of the drifters and floaters, lead the students in a discussion of: What is hot? What is cold? What can we use to measure temperature? Do students have a temperature?
Middle School:
The thousands of drifters are used to get real time readings of sea surface temperatures worldwide. Start by asking the students what is the temperature of our classroom. After they give you the answer ask them if it is that temperature everywhere in the classroom. Have them devise a way to check their theory. Why is it the same/different around different parts of the room? Hint: This hint is for the classroom teacher and will be found at the bottom of this posting.
High School:
This is the drogue chute that is deployed in the water beneath the drifter to stabilize its deployment with the ocean currents.
Students should go to the Datastreme Oceans website to explore some of the cool findings available to the public.
Thought Experiment provided by Dr. Weller:
How does an Argo float rise to the surface and later sink to a desired depth?
Middle School hint:
Have the students set about 20 cups or glasses, filled with water, in various locations around the room. Be sure the containers are covered to reduce cooling due to evaporation. Let the water stabilize overnight. The next day, have the students take temperature readings at the different “sites”. Compare the different readings around the room. Are they all the same or are they different. Lead the students in a discussion on the reasons for their results. Can they make any predictions about tomorrow’s readings? Do the readings change over the weekend? (Most schools turn down the heat on the weekend). Have each class post their findings so that other “scientists” from other classes can be compared with their own. Maybe 1st period is different from 7th period.
High School Hint:
The ocean is stratified–the seawater is denser the deeper you go. This is because it is colder and sometimes saltier at depth. The density of the float depends on the ratio mass/volume. The float has a reservoir of oil inside that is pumped into or taken back from an external inflatable rubber bladder. Filling or emptying the bladder changes the volume of the float while its mass remains the same, so the float can change its density, allowing it to become buoyant enough to float to the surface or to adjust itself to match the density of seawater at 1,500m.
NOAA Teacher at Sea
Brett Hoyt
Onboard NOAA Ship Ronald H. Brown October 8 – 28, 2006
Mission: Recovery and maintenance of buoy moorings Geographical Area: Southeast Pacific, off the coast of Chile Date: October 12, 2006
Weather Data from Bridge
Visibility: 12nm(nautical miles)
Wind direction: 185º
Wind speed: 9 knots
Sea wave height: 2-3ft
Swell wave height: 3-4 ft
Sea level pressure: 1011.9 millibars
Sea temperature: 23.9ºC or 75.0ºF
Air temperature: 21.0ºC or 69.8ºF
Cloud type: cumulus, stratocumulus
Dr. Byron Blomquist (seated) and graduate student Mingxi Yang (standing) beside the Atmospheric Pressure Ionization Mass Spectrometer or APIMS.
The Scientists
As I mentioned yesterday, today I will begin to introduce the scientists, their equipment, and their experiments. Today I would like to introduce to you Dr. Byron Blomquist (lead scientist) and graduate student Mingxi (pronounced ming-she) Yang, both from the University of Hawaii. They plan to study the exchange of gases between the ocean and the atmosphere.
Dr. Blomquist is a quiet, soft-spoken, and self-professed tinkerer. He began his love of science at an early age with a fascination for all things living. He took a great interest in bugs, snakes, birds, and other animals and insects. He stated that Biology was his favorite subject. Dr. Blomquist has a few interesting facts about himself he is willing to share with us; one is that he works in Hawaii however he lives in Colorado and the other is that he finished high school in only three years!
Mr. Hoyt standing in front of Dr. Blomquist’s portable lab. Please note the wires leaving the lab to the left of the photo.
The other scientist is graduate student Mingxi Yang, we just call him Ming for now but someday we will have to address him as Dr. Yang as he plans on earning his doctorate degree. Ming is a very intelligent and self-confident graduate student from the University of Hawaii. Ming originally was born in Beijing China, when at the age of 14 his family moved to Massachusetts. He originally was going to get a degree in chemistry when in his junior year in college he accepted a summer internship with the Woods Hole Oceanographic Institution. It was during these 12 weeks that Ming decided that he could impact the world in a more positive way by switching majors and getting a degree in Oceanography.
Here is a view of the mast at the front of the ship. Because the instruments are so sensitive, no smoking will be allowed on the bow. The mast is over 20m high that is over 60ft!
The Machine
The Atmospheric Pressure Ionization Mass Spectrometer or APIMS for short is one of only three that exist worldwide. Dr. Blomquist built this machine from scratch. Many of the components and circuit boards were custom designed and built specifically for this machine. If cool and shiny is your thing and you have $300,000 in your piggy bank then you might be able to get Dr. Blomquist to build you one. What cool scientific discovery you make with it is up to you. Many students envision that science takes place only in large land based laboratories, but they would be wrong. Below is the portable (you might need a big truck or ship) laboratory that Dr. Blomquist and Ming brought with them. It’s sort of like a camper without the wheels.
The Experiment
We have read about man-made global warming and generally believe that this is not good for the earth and its climate. Scientists also believe that the main source of global warming is the buildup of excess carbon dioxide in the atmosphere. Since it would be impossible to measure everywhere on the earth at the same time scientists use powerful computers to create models (computer programs) to predict what is happening over the entire earth. The Atmospheric Pressure Ionization Mass Spectrometer or APIMS measures a gas, which in computer models is similar to carbon dioxide. What Dr. Blomquist and Ming are doing is collecting data to compare with model predictions to improve current computer models of the climate. What they are looking for is the interaction between the atmosphere and the ocean. Liquids can and do absorb gasses. To illustrate this open up a can of soda pop. The bubbles you see are the gas carbon dioxide leaving the liquid. The ocean both absorbs and releases carbon dioxide, and therefore plays an important role in climate regulation.
The Teacher
I spent my day interviewing scientist and preparing for upcoming interviews with other scientist. Tomorrow we enter international waters and the experiments can begin. I will also begin drifter watch. My watch time will be from 8am to 12 noon and 8pm to 12 midnight. I will provide more details tomorrow and discuss drifters and how they are used.
Classroom Activities
Elememtary K-6:
Because of the complexity of this experiment we will have no classroom activity but perhaps you could enjoy a bubbly beverage of your choice.
Middle School:
How many liquids could you list that have dissolved gases in them that are commonly found in the home. What gases do you think they are? Are they harmful to the planet?
High School:
How many liquids could you list that have dissolved gases in them that are commonly found in the home. What gases do you think they are? Are they harmful to the planet?
We will continue to visit with some of the scientists and find out more on what experiments are being conducted on this Stratus 7 cruise and why.
Mr. Hoyt “driving” the ship. The two controls I am holding are how the ship is steered. The ship has no rudder and the pilot need only to rotate these controls to turn the propellers in a different direction. Much like turning the motor on a small boat.
NOAA Teacher at Sea
Brett Hoyt
Onboard NOAA Ship Ronald H. Brown October 8 – 28, 2006
Mission: Recovery and maintenance of buoy moorings Geographical Area: Southeast Pacific, off the coast of Chile Date: October 11, 2006
Weather Data from Bridge
Visibility: 10nm (nautical miles)
Wind direction: 220º
Wind speed: 12 knots
Sea wave height: 3-4ft
Swell wave height: 3-5 ft
Sea level pressure: 1012.9 millibars
Sea temperature: 25.5ºC or 77.9ºF
Cloud type: cumulus, stratocumulus
The Commanding Officer of the RONALD H.BROWN, CAPT. Gary Petrae
The Ship and Crew
I am presently on board the NOAA ship RONALD H. BROWN. This ship was commissioned in 1997 and is 274 feet in length (just 16 feet shorter than a football field) and 52 feet wide. The ship displaces 3,250 tons and has a maximum speed of 15 knots. Captain of the RONALD H. BROWN (RHB) is Gary Petrae. Captain Petrae has just celebrated his 28th year serving in the NOAA Officer Corps. The RHB is the fifth ship Captain Petrae has served on and the second ship he has commanded in his tenure with NOAA. We are truly lucky to have such an experienced captain at the helm. When you are thousands of miles out to sea, you entrust your life to the captain and crew. One of the interesting facts about a ship at sea is that someone must be at the helm 24 hours a day 7 days a week. Now the captain cannot be there all the time so he turns over the job of “driving” the ship to one of his other officers.
They take “watches” which in this case are four hours in duration. During a recent trip to the bridge (this is what they call the command center for the ship) I was fortunate enough to visit with the Officer Of the Deck (OOD for short) Lieutenant (Junior Grade) Lt (JG). Jackie Almeida. She stands approximately 5’0” with reddish/brown hair and a confidence that fills the bridge. Her bright eyes and effervescent personality quickly put me at ease. She earned her degree in meteorology and joined the NOAA Officer Corps. When she finishes her assignment with the RHB she will join the NOAA hurricane hunters and be advancing our knowledge of these deadly storms.
Ltjg. Jackie Almeida on the bridge
The Scientists
The scientists are spending the day checking and rechecking their equipment making sure that when the crucial time comes all will go well.
The Teacher
I spent the day observing the scientist preparing equipment and rechecking systems. I am trying to remember all the safety information that was delivered on the first day. Just like in school, we have safety drills so that in the event something goes wrong everyone knows what to do. We practice fire drills just as you do in school. We also have abandon ship drills. Below you can see me modeling the latest fashion in survival suits. The crew calls them “Gumby suits.”
Classroom Activities
Mr. Hoyt “looking good” in his survival suit. Hey kids, wouldn’t your teacher look good in this suit?
Elememtary K-6
Today’s activity is to give the students an idea of the ship that I’m on. The teacher will need at least 650 ft of string (you can tie shorter rolls together) and as long a tape measure as you can find (a 100ft one works best). This activity would be best done on the playground or any other large open space. Have student-A hold one end of the string and measure out 274 feet in a straight line. Then have student-B hold the string loosely and run the string back 274 feet to a different student-C but even with student-A. Now have students A and C move 52 feet apart and finish up with student A holding both the beginning and end of the length of string-Do not cut the string as you will need to keep letting out more string as you complete the next part. Now have the rest of your class hold the string 52 feet apart between the two long lengths of string working your way up to student B remembering that the ship comes to a point (the bow). Go to this website for complete drawings.
Middle School
At the beginning of this log, I mentioned that the Ronald H. Brown displaces 3,250 tons. What does this mean? Can you use the concept of water displacement to measure other objects? Hint.
High School
The ship travels at a maximum speed of 15 knots. Approximately how long would it take for the ship to sail at maximum speed from Panama City to 25 degrees south latitude and 90 degrees west longitude off the coast of Chile? How many nautical miles would be traveled? How many land miles would that be? Hint.
A scientist is checking an acoustic release mechanism. They lowered it to 1,500 m to test it. It will eventually be located 4,000 m beneath the surface!
On my next few postings we will be visiting with some of the scientist and finding out more on what experiments are being conducted and why.
