91制片厂

You might be surprised to find undergrads in a science class drawing and coloring, but that鈥檚 exactly what they were up to in a recent introduction to marine biology lab in the Spaulding Life Sciences Center at 91制片厂. Sprawled out among microscopes and with markers in hand, students in groups of four spent the first 30 minutes decorating panels of cotton canvas.

Scientific anarchy? No, says Amanda Sobel '15G, the 91制片厂 graduate student leading the lab. 鈥淭his is hands-on science.鈥�

The panels will be used as sails on two vessels the students are building to help ocean scientists understand more about surface currents in the Gulf of Maine.听Wind-generated currents that generally occur within the top few hundred feet of the ocean, surface currents impact shipping traffic, the weather and larval distribution of sea animals, among other things. Knowing more about their dynamics could help with storm track forecasting, oil spill mitigation and search and rescue operations, for example.

The vessels the students are building鈥攃alled 鈥渄rifters鈥濃�攁re simply constructed aluminum and wood units that will bob along the current, relaying their position periodically via satellite to scientists at the National Oceanic and Atmospheric Administration () and the Northeast Regional Association of Coastal and Ocean Observing Systems (). These scientists will add the information to a database housing all kinds of oceanic data that is made available to fishermen, recreational boaters, the Coast Guard and other scientists who study the ocean, climate change and atmospheric science.

The students are building the 鈥淚rina鈥� model, one of three drifter prototypes out there today. They鈥檒l attach the sails to aluminum spars and lash on buoys so the drifters will float. Then they鈥檒l screw square, wooden platforms to the tops and attach GPS transmitters to each.

The term 鈥渟ails鈥� is deceiving. The panels鈥攊ndeed, most of the drifters鈥攚ill be submerged, with only about a foot visible above the surface. 鈥淲e need the sails in the water column in order to get the data about these particular currents,鈥� says Sobel. The water will push the sails, helping give precise information about the currents鈥� movements.

The coloring of the sails wasn鈥檛 only for decoration, by the way. Each panel includes the name and phone number of the NOAA scientist who will recover the drifter should it wash ashore.

Drifters were first envisioned by NOAA scientists who needed an affordable way to track surface currents. Since deploying the first few a decade ago, the agency has collected data from thousands of drifters. Sobel says this exercise is a way for the students to use oceanographic tools and add information to a larger data set used by the scientific community. Their drifters will transmit data three times each day.

鈥淚t鈥檚 really interesting to watch the data come in,鈥� says Sobel, who built her first during a NOAA and NERACOOS conference in Woods Hole, Mass., earlier this year and launched it from NOAA鈥檚 R/V TIOGA into the Gulf of Maine in May. She says the experience was great fodder for the classroom. 鈥淭his is hands-on marine biology. This is what real biologists are doing.鈥�

Erik Chapman, the assistant professor of natural resources who teaches the course, says, 鈥淭he drifter exercise illustrates to our students how physics drives biology in the marine system. You can鈥檛 understand marine biology without paying careful attention to ocean physics, particularly at the ocean surface.鈥�

The drifter-building is just the beginning of a semester-long exploration into ocean data and its uses. After launching their drifters, each student will study a biological process of their choosing using data from drifters and other ocean鈥憃bservation instruments such as buoys and floats.

The students launched their drifters into the Gulf of Maine from the M/V Granite State on Sunday, October 12. You can monitor the drifters鈥� movements on the听.听

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