A citizen science workshop will be held on Saturday, October 21st at the University of Iowa Memorial Union. Hosted by the UI Geoinformatics for Environmental and Energy Modeling and Prediction (GEEMaP) Program, the half-day workshop will provide information about opportunities for Iowa residents to participate in research related to wildlife, water quality, and natural resource management. Dr. Kristine Stepenuck, Extension Assistant Professor of Watershed Science, Policy and Education at the University of Vermont, will be the free event’s keynote speaker.
The spring semester has come to a close and most UI professors have retreated to their campus labs to catch up on research. Dr. David Peate, on the other hand, is spending his summer days floating on the South China Sea.
This is no pleasure cruise, however. The professor of Earth and Environmental sciences is working 12-hour days to advance scientific understanding of how continents separate and oceans are formed. Peate embarked on the 9-week expedition funded by the International Ocean Discovery Program with 125 other scientists and crew members from around the world, he explained in an interview with Iowa Now.
In the interview, Peate explained that when continents drift apart, the uppermost layer of the Earth’s crust is stretched so much that parts of a deeper layer called the mantle can ooze up into the crust. Sometimes the mantle is so hot that it rises up as lava and forms continental boundaries like those seen in eastern Greenland and northern Europe, he explained. Other times, the mantle rises at cooler temperatures and no lava is formed. The expedition’s primary mission is to understand the difference between these two types of continental rifts.
The continental rift in the South China sea is “different than other well-studied rifted margins. For one, it is not covered by thick piles of lava flows, unlike most other examples of continental rifting, which spawned lava flows,” he said.
The researchers’ ship is equipped with a three mile long steel tube that drills into the ocean floor to collect cores. “That is equivalent to the distance between the Old Capitol and Iowa City West High School,” Peate explained to Iowa Now. Once pulled up, cores are separated into five-foot lengths and prepared for geologists to study. Peate is mostly interested in volcanic rock. Some of the cores will return to Iowa with him. He said, “I will collaborate with other international scientists from the expedition to make detailed chemical investigations of all the volcanic rocks that we find.” Peate continued, “Combining results from the different drilled sites will allow us to build a picture of how the volcanic activity changed through time as the rifting event happened.”
Peate’s other areas of research include the formation and transport of magma in Iceland and the driving forces behind large magma eruptions. His compete interview with Iowa Now can be found here.
Neonicotinoids, a specific class of pesticides, have been detected for the first time ever in tap water according to a recently published study by University of Iowa scientists and the U.S. Geological Survey.
A team of researchers compared tap water samples from the University of Iowa drinking water supply to samples of Iowa City municipal tap water. Tap water from each source was tested for three primary neonicotinoid types: clothianidin, imidacloprid and thiamethoxam. The University of Iowa filtration system removed only a minute amount of each insecticide. In contrast, the City of Iowa City successfully removed 100 percent, 94 percent and 85 percent, respectively, of each primary neonicotinoid.
Researchers say this can be explained by the different filtration systems used in each facility. Neonicotinoids readily dissolve in water, they say, and therefore easily slip through the University’s sand filters. The city employs an activated carbon filter that successfully removes the chemicals. Dr. Gregory LeFevre, University of Iowa environmental engineer and one of the study’s authors, said that activated carbon filters can be a cost-effective way to tackle these insecticides in an interview with the Washington Post. In fact, the University purchased a small activated carbon filtration system shortly after the study wrapped up in July 2016.
Levels of neonicotinoids in University water were relatively small, ranging from 0.24 to 57.3 nanograms per liter. LeFevre said, “Parts per trillion is a really, really small concentration.” The U.S. Environmental Protection Agency has not set a limit for neonicotinoid levels in drinking water. The study’s authors argue that more research is called for to assess neonicotinoid exposure on a larger scale. LeFevre explained, “Without really good toxicity data it is hard to ascertain the scale of this, but whenever we have pesticides in the drinking water that is something that raises a flag no matter what type of concentration it is.”
The lecture, titled “What Goes Around, Comes Around: The Global Reach of Air Pollution” featured opening remarks from University of Iowa President Bruce Harreld. Quoting Dr. Jerry Schnoor, Carmichael’s co-director at CGRER, President Harreld joked, “Greg is now more traveled than George Clooney’s character in Up in the Air, four million miles and counting.” Carmichael’s extensive research of the long-range transport of air pollution has taken him to many parts of Eastern Asia, South America, Africa and Europe, among other locations.
Carmichael’s lecture was organized into three parts: the global reach of air pollution, the link between climate change and air pollution, and a finally, a discussion about the action necessary to curb air pollution worldwide. The lecturer made a strong case for air pollution research, citing that it is the root cause of 7 million avoidable deaths per year. Carmichael pointed out that air pollution has economic consequences too; each year, it leads to loss of 10 percent of U.S. soybean yields.
The lecture encouraged a sense of urgency when it comes to cleaning up the atmosphere. Carmichael warned, “That molecule that we put in the air today will stay in the air for a long time.” He went on to say that 20 percent of carbon dioxide released into the atmosphere today will remain there for thousands of years. Professor Carmichael’s research focuses primarily on the utilization of comprehensive computer models and big data to simulate the interplay of air pollutants with weather and climate.
His work has been instrumental in understanding the way in which air pollutants from China move across the Pacific Ocean and affect the Western U.S. He said, “Fifteen to twenty percent of clean air policies in the Western U.S. are being offset by Chinese emissions.”
Above all, the Karl Kammermeyer professor of chemical and biochemical engineering emphasized his passion for instructing and advising students. Carmichael has supervised the research of 40 PhD and 35 Masters of Science students at the University of Iowa.
To learn more about Dr. Carmichael’s career, check out episode 5 of CGRER’s EnvIowa podcast.
In Episode 5 of EnvIowa we speak with Dr. Gregory Carmichael, Karl Kammermeyer Professor of Chemical and Biochemical Engineering and Co-Director of the UI Center for Global and Regional Environmental Research, about his extensive research on global air pollution.
Dr. Carmichael shares his experiences collaborating with scientists in China, explains why air quality issues in East Asia should matter to Iowans and offers some perspective about what climate science research may look under the new federal administration.
This episode offers listeners the chance to learn more about Dr. Carmichael’s long and esteemed career in climate science prior to his delivery of the 34th Annual Presidential Lecture this weekend. His lecture, titled “What Goes Around, Comes Around: The Global Reach of Air Pollution,” will take place this Sunday, February 19th at 3:30 pm in the fourth-floor assembly hall of the Levitt Center for University Advancement.
EnvIowa is also available on iTunes and Soundcloud, a complete archive of EnvIowa episodes can be found here.
University of Iowa facilities management received notice on February 1 that its drinking water system contains levels of Total Trihalomethanes (TTHM) that exceed the federal drinking water standard.
In an email sent out to University faculty, staff and students on February 9, it was reported that the drinking water tested on average between 0.081 and 0.110 mg/L over the last year. The U.S. Environmental Protection Agency’s maximum contaminant level (MCL) for TTHM is 0.08 mg/L.
The notice read, “You do not need to use an alternative (e.g., bottled) water supply. Disease prevention specialists with University of Iowa Hospitals and Clinics say special precautions are not necessary.”
University officials cautioned, “However, some people who drink water-containing trihalomethanes in excess of the MCL over many years may experience problems with their liver, kidneys, or central nervous system, and may have an increased risk of getting cancer.”
A study by the California Department of Health suggests that even short-term exposure to high TTHM levels in drinking water can have serious consequences for pregnant women. Scientists monitored 5,144 women during their first trimester of pregnancy. Participants who drank five or more glasses of cold home tap water containing 0.075 mg/L or more of TTHM had a miscarriage rate of 15.9 percent. Women that drank less than five glasses per day or who had home tap water with less than 0.075 mg/L TTHM had a miscarriage rate of 9.5 percent.
A reverse osmosis filtration system for the University of Iowa drinking water supply is currently in its design phase. Facilities management expects to have the new system up and running within the next 18 months. Officials say it will help address Iowa’s nitrate problem and filter out naturally occurring organic matter, resulting in fewer TTHM.
The study points out that ethanol production in the state relies heavily on groundwater from the Jordan aquifer, which also provides roughly 300,000 residents with drinking water. From 2003 to 2013, annual use of groundwater from the aquifer for ethanol production increased by 7.4 billion liters per year.
Keith Schilling is a research scientist at the Iowa Geological Survey at the University of Iowa and the study’s leading author. He said,
“The implications for biofuel refineries and any water use of the aquifer is the realization that the groundwater is very old. It is not going to be recharged in any human timeframes so we should make sure that water from the aquifer is being managed appropriately.”
Beyond the lagging groundwater regeneration rate, the study also notes that increased groundwater pumping can result in detrimental water quality changes such as radium contamination. The authors conclude with a call for new ethanol refineries to steer clear of the Jordan Aquifer and utilize more sustainable groundwater sources instead.