NOAA Teacher at Sea
Dorothy Holley
Aboard NOAA Ship Pisces
July 31 – August 15, 2025
Blog Post #7
Mission: Northeast Ecosystem Monitoring Survey (EcoMon)
Geographic Area of Cruise: Northwest Atlantic Ocean
Date: August 14, 2025
Weather Data from Bridge:
Latitude: 4025.699
Longitude: 07321.16
Relative Wind speed: 4
Wind Direction: 66
Air Temperature: 23.5
Sea Surface Temperature:
Barometric Pressure: 1011.47
Speed Over Ground: 10.1
Water Conductivity: 4.69
Water Salinity: 31.21
First, Ferdinand asked about Sea Surface Temperature (SST) data the ship is collecting and how to access it. Storm Events, like the Hurricane Dexter and Tropical Storm Erin draw energy from warm ocean waters, which act as their primary fuel source. Warmer waters lead to increased evaporation and provide more latent heat to the storm, allowing it to strengthen. The National Weather Service (NWS) is a part of the National Oceanic and Atmospheric Administration (NOAA) and uses SST data in making forecasts. The data is available publicly here. Thank you for reading and asking good questions!
Second, an answer to the math problem on the last BLOG: If each of the engines’ cylinders has a displacement of 51 liters, and the engine has 12 cylinders, so the total displacement of the engine is 612 liters. The displacement from a car engine could fit into the Pisces 204 times.
Victoria (left) and Rowan (right) wrangle a radiometer
Science at Sea
How do we know that satellite information is valid? The satellites must be calibrated, just like the sensors in all other electronic devices.
One ongoing project taking place on our NOAA Summer EcoMon cruise is a calibration validation of a NASA PACE satellite measuring plankton. (See more here.) Victoria and Rowan are Biological Oceanographers, studying how light interacts with the ocean. Once a day, when the PACE satellite crosses over our location, they throw out the radiometer, pull it to the surface from different depths, and ensure it is collecting radiation or light data as it sinks to about 1% light transmission.
Victoria and Rowan also test the water with radiometer casts, once per day during satellite overpass. If we are doing a CTD stop, they will use water from the Rosette, but if we aren’t doing a CTD stop they can use water from the flowthrough system in the chem lab sink. This is a special plumbing network that allows seawater from below the ship to be retrieved in the lab spaces. These tests must happen during daylight hours.
The water is filtered out for particulate matter (plankton and other stuff) and colored dissolved organic matter (CDOM). These will eventually be used to characterize coloration through a spectrophotometer, although some of it will go directly to NASA. That’s right. They measure the wavelength of water, specifically how the light and color change throughout the water column.
The data are analyzed, triangulated, and compared with data being collected at other places. (Read about another validation team here.) Understanding light saturation might someday help fisheries measure water health in ways that will save money. If areas don’t have plankton, the bottom level of the food chain, then they won’t have higher levels either and fisheries should look elsewhere to fish.
Another member of the science crew is collecting dissolved oxygen and dissolved inorganic carbon data as we make our planned stops. It seems like everything is tied to Chemistry in some way!
You do the Math: If we sorted through 1/8 of our last sample from the Bongo nets, and identified 20 krill, how many krill would you estimate to be in the total sample. Then determine abundance if the nets filtered through 5 cubic meters of water. In other words, how many krill would you estimate we would find per cubic meter in this part of the ocean. Check in the next blog post for both answers.
Career Spotlight: James Walker, Chief Boatswain.
James Walker serves as Chief Boatswain on NOAA Ship Pisces where he manages a 7-person department. He holds a bachelor’s degree in Human Resources from Park University. Having retired from serving 20-years in the Navy and serving as the Upward Bound Activities Coordinator for the University of Tennessee, James joined NOAA 18 years ago.
He is responsible for running the gear for our science experiments – cranes, hydro wrenches, A-frames, net grills, bongo nets, and CTD rosettes – as well as watch, lookout, and security. Without James and his crew, the experiments could not happen.
He loves playing all sports, especially bowling and baseball. His favorite tool is his computer because it keeps him informed of what is happening on the ship and in the world, but mainly because it keeps him in touch with his family. With his wife and nine children back home in Tennessee (ok, one child escaped to Mississippi), staying in touch is an important task!
Interesting Things: James Walker is also a NOAA Ship Pisces plank owner. That means he is a part of the original crew (since 2009) and has been responsible for establishing the operations. We don’t use that term in the Education-world, but if we did, we would say that Kris Bennet, Heather Earp, Chris Lee, Don Roncska, and Yvette Truman are West Johnston High School plank owners. These five teachers have been at West Johnston since 2003, the first year it was a four-year high school. Plank owners have a way of keeping things even-keeled. I think that every school should have a plank owner plaques!
Personal Log
When I was in high school, my Chemistry teacher Lavonda Ritchie showed me a styrofoam cup that had been sent to the bottom of the ocean and had shrunk. I thought that was the coolest thing ever. But now I have my own styrofoam cup. and bird. and ball. and another cup. I am SOOOOO excited to show my students! Thank you Mrs. Ritchie!!!
Before and after…. our styrofoam birdies shrunk! The picture on the left is before they were sent to the bottom of the ocean. The white, undecorated, styrofoam bird on the right is another way to see how big the birds were before the dive. Increased pressure from all the water molecules pushing down on them at the bottom of the ocean decreased the volume of gas trapped in the styrofoam. The cups and cones (below) were also part of the fun experiment!
