His goal? To compare ancient meteorological patterns with modern ones in the northern Gulf of Mexico region and ultimately inform policymakers on how to build a sustainable water supply.
On a recent morning, the Florida State University doctoral student in oceanography huddled with artisan Charlie Scott-Smith at Florida State's Master Craftsman Studios (http://craft.fsu.edu/). The two were making molds of stalagmites, the natural formations rising from the floor of limestone caves that are formed by the dripping of water containing calcium carbonate. (Their counterparts, stalactites, hang from the ceilings of such caves.)
Video: Digging deep to study ancient climate
Surrounded by the studio's eye-catching artifacts — models of architectural fittings, an ancient ship, even a copy of the sculpture "Winged Victory" from the Louvre Museum — Tremaine and Scott-Smith worked with a rubbery urethane compound to create stalagmite molds that resembled giant beeswax candles. Next, they filled the molds with cement and glass.
After the cement thoroughly dried, Tremaine returned the reproduction stalagmites to the cave, where, over time, dripping water will coat them with calcite and they will start growing again. The remote, Northwest Florida cave maintains a constant, year-round temperature of 72 degrees and a 100 percent relative humidity level, which means, as Tremaine likes to joke, "that if you start to sweat, you stay wet."
As part of a three-year climate research project, he harvested the two stalagmites — one 4,000 years old, the other 25,000 years old — from the cave to analyze them for isotopic and trace element variations in an effort to build a 4,000-year paleo-rainfall record for North Florida. In a unique arrangement with the Southeastern Cave Conservancy Inc. (SCCI), a nonprofit group that owns dozens of caves in the southeastern United States, he was allowed to take the stalagmites as long as he made duplicates of them and placed the duplicates back in the cave — a measure of cave conservation.
The real stalagmites will be studied at the National High Magnetic Field Laboratory (http://www.magnet.fsu.edu/) at Florida State, where Tremaine, a graduate research assistant, is currently stationed in the geochemistry lab.
So far, Tremaine has been scrutinizing carbon, oxygen and strontium isotopes on modern calcite grown in the cave on glass microscope slides — what he calls "modern calibrations of ancient proxies." Isotopes of an element are atoms with the same number of protons but different number of neutrons, thus a slightly different atomic mass. He will use that data to get a better idea of ancient ventilation patterns, the temperature inside of a cave when the stalagmites were forming, what type of vegetation was growing above the cave, of, and whether the weather was cold, warm or hot during a particular span of time.
"By looking at trace elements we can get an idea of very wet and very dry rainfall patterns and cycles," Tremaine said. "We'll better understand severe weather patterns."
Tremaine, along with a six-member team of scientists, researchers and graduate students, will cut the stalagmites in half and then use a 50-micron laser to vaporize calcite that they will then measure with a spectrometer. The laser will allow them to study monthly weather patterns in the Northern Gulf Region thousands of years ago. By extracting calcite powders with a half-millimeter drill bit, they will examine the region's wet and dry seasons in five-year increments. Eventually, they hope to create a high-resolution time series, analyzing monthly weather patterns over thousands of years.
"We will be the first to do this in the southeastern United States," he explained. "The research is very important because we will be able to study our monsoonal weather patterns, which are much like India and China, with very wet and dry seasons. "
Tremaine's six-member climate research team includes a wide swath of experts, from a retired professor to a Russian mathematician and an undergraduate cave researcher. They are Florida State faculty members Bill Burnett, the Carl Henry Oppenheimer Professor of Oceanography; and Doron Nof, Distinguished Nansen Professor of Physical Oceanography. In addition, Guy "Harley" Means, assistant state geologist at the Florida Geological Survey; Brian Kilgore, a Florida State undergraduate majoring in biochemistry; and Karina Khazmutdinova, a mathematician and doctoral student at the FSU Geophysical Fluid Dynamics Institute, served on the team.
Their research work on isotopes was recently published in the journal Geochimica et Cosmochimica Acta. Tremaine and his team's research on trace elements also will soon be published in the same research journal. They are also in the process of writing an article for the Journal of Hydrology.
"Records of past climates can be found in the ice caps and in the deep sea," said Jeff Chanton, FSU's John W. Winchester Professor of Oceanography, who has worked with Tremaine. "The unique aspect of Darrel's work is that it will give us a record of local climate right here on the Northern Gulf Coast. This is important because a record of past climate in our region would help to predict what's to come in response to human disturbances of atmospheric greenhouse gas concentrations."
The 32-year-old Tremaine, who holds a master's degree in oceanography from Florida State and an undergraduate degree in engineering from the University of Cincinnati, dreams of someday starting his own groundwater research lab, where he would also teach middle and high school students to do research.
"Working with younger kids and teaching them to do research early makes sense, because if we inform them, they will someday inform us," he said.
But first, Tremaine and his team recently negotiated permission from the state of Florida to move their cave-monitoring equipment into one of the most pristine and highly guarded caves in Florida Caverns State Park, located near the Panhandle town of Marianna. Tremaine has already been in the cave for preliminary investigations, and the team began installing equipment in November.
Not easy work, by any means: "No one," Tremaine explained one morning while he helped Florida State Master Craftsman artisans put the final touches on the stalagmite molds, "has been in that cave since 2006."
For more information, contact Tremaine at (513) 315-2583 or email@example.com
Tremaine | Newswise Science News
Successful calculation of human and natural influence on cloud formation
04.11.2016 | Goethe-Universität Frankfurt am Main
Invasive Insects Cost the World Billions Per Year
04.10.2016 | University of Adelaide
A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.
Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...
In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...
The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.
The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...
Broadband rotational spectroscopy unravels structural reshaping of isolated molecules in the gas phase to accommodate water
In two recent publications in the Journal of Chemical Physics and in the Journal of Physical Chemistry Letters, researchers around Melanie Schnell from the Max...
The efficiency of power electronic systems is not solely dependent on electrical efficiency but also on weight, for example, in mobile systems. When the weight of relevant components and devices in airplanes, for instance, is reduced, fuel savings can be achieved and correspondingly greenhouse gas emissions decreased. New materials and components based on gallium nitride (GaN) can help to reduce weight and increase the efficiency. With these new materials, power electronic switches can be operated at higher switching frequency, resulting in higher power density and lower material costs.
Researchers at the Fraunhofer Institute for Solar Energy Systems ISE together with partners have investigated how these materials can be used to make power...
16.11.2016 | Event News
01.11.2016 | Event News
14.10.2016 | Event News
02.12.2016 | Medical Engineering
02.12.2016 | Agricultural and Forestry Science
02.12.2016 | Physics and Astronomy