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I am actively seeking outstanding undergraduate and graduate students to join our research group. Contact me to learn more about our student research opportunities.

Current Student Researchers:

Gifford WongGifford Wong, Dartmouth College PhD Candidate (expected 2014)

I am co-advising Giff with Bob Hawley in his PhD research investigating the chemical and physical properties of the near-surface snow and firn in north-central Greenland and West Antarctica. Giff is analyzing samples from a series of snow pits and shallow cores (up to 100 m deep) collected in west Antarctica and along a logistics traverse route from Thule to Summit, Greenland. He investigated and published a paper on the effects of meltwater percolation on trace element snow chemistry. Giff previously spent several seasons at McMurdo Station in Antarctica as a Helicopter Technician, and has interests in polar logistics and climate policy.

Sam BealSam Beal, Dartmouth College PhD Candidate (expected 2014)

Sam is investigating mercury and other heavy metal pollution in Peru and Western Canada using a combination of lake sediment cores and ice cores with Meredith Kelly, Brian Jackson and me. Sam and I recieved an NSF Doctoral Dissertation Research Improvement Grant to analyze the Mt. Logan (Yukon, Canada) ice core for total mercury concentrations over the past 12,000 years. This will allow Sam to investigate the natural cycling of mercury throughout the Holocene, as well as human pollution over the past few hundred years from mining and coal burning. Learn more on Sam's personal webpage.

Dom WinskiDom Winski, Dartmouth College PhD student (expected 2017)

Dom joined the research group in the fall of 2013 to conduct his PhD research on the paleoclimate of central Alaska using the new ice cores collected from Mt. Hunter in Denali National Park. This is part of our NSF-funded project in collaboration with Karl Kreutz (UMaine), Cameron Wake (UNH), and Sean Birkel (UMaine). Dom was a key member of the field team that drilled the ice core in May-June 2013 (pictured). Dom previously worked in this region as a MSc student with Karl Kreutz at UMaine modeling snow melt events on the Kahiltna Glacier, and publishing a paper on the influence of meltwater on snowpack stratigraphy. Dom was able to extrapolate his results to study changes in the mass balance of Alaska Range glaciers. Dom graduated from our department with his BA in 2009.

Sam StreeterSam Streeter, Dartmouth College Senior Thesis (December, 2013)

Sam conducted a joint Earth Science-Engineering Senior Thesis with me and Thayer School professor Vicki May focused on advancing our ice core melter system to the next level of state-of-the-art capabilities. Specifically, Sam focused on improving our ice monitoring system, and adding new in-line meltwater analyses to give us real-time data on dust concentration and particle size, electrical conductivity, and chemical concentrations. Sam participated in our June 2013 field season in Denali National Park during which we collected two ice cores from Mt. Hunter to bedrock (208 m) and installed two automatic weather stations (pictured is Sam prussiking up the weather station mast with Denali in background).

Seth CampbellSeth Campbell, University of Maine PhD Candidate (expected 2014)

I am a memeber of Seth's PhD committee for his research with Karl Kreutz at UMaine and Steve Arcone at CRREL investigating the volume, velocity, and flow characterists of the Kahiltna Glacier on the Denali Massif using ice penetrating radar, GPS data, and ice flow modeling. This research was essential to our discovery of Mt. Hunter as an idea deep ice core site in Denali National Park, from which we collected a 1000-year ice core record in June, 2013. Seth was a key member of the 2008 (pictured), 2009, and 2013 expeditions to Denali, and led the Denali expeditions in 2010, 2011, and 2012 as part of his MSc and PhD research at UMaine. Seth is also affiliated with the Cold Regions Research and Engineering Laboratory (CRREL) in Hanover, NH. Seth has authored three publications (2012a, 2012b, 2013) during his graduate studies.

EriC Kelsey, University of New Hampshire PhD Candidate (expected 2014)

I am on EriC's PhD committee for his dissertation work with Cameron Wake at UNH on Late Holocene climate change in the North Pacific using ice core stable isotope and precipitation records from the Saint Elias (Eclipse site) and Alaska (Denali) Ranges. EriC will be developing an understanding of the synopic conditions that contibute to the isotope and accumulation records in the North Pacific so as to interpret the 1000+ year ice core records from this region. With a background in meteorology, EriC hopes to gain a better understanding of how synoptic scale pressure patterns and storms are related to circulation changes on annual to millennial timescales. EriC was able to collect ice cores, snowpit, and ice geophysical data on the Denali massif during our reconaissance expedition in the summer of 2008 (pictured).

Recent Student Researchers

John ThompsonJohn Thompson, Dartmouth College Senior Thesis (May, 2013)

JT worked in our research group throughout his undergraduate tenure at Dartmouth, including trips to Peru (2010), Denali Alaska (2011), and Thule Greenland (2012; pictured). He collected and analyzed snow samples from Mt. Hunter in Denali National Park to investigate the fallout of radioactive cesium from the Fukushima Dai-ichi nuclear power plant disaster. His later senior thesis research focused on developing an ice core proxy record of past sea ice extent in Baffin Bay from an ice core we collected from North Ice Cap (near Thule, Greenland) in 2012. JT found that sodium from freshly grown sea ice is incorporated in North Ice Cap snow, and can be used to reconstruct the past extent of sea ice in Northern Baffin Bay. JT is currently seeking an MSc in polar studies from Cambridge University.

Hazel ShapiroHazel Shapiro, Dartmouth College Senior Thesis (May, 2013)

Hazel's senior thesis research focused on analyzing 5 years of data from our automatic weather station on the Kahiltna Glacier in Denali National Park. Hazel made statistical comparisons between the station on the glacier and nearby National Weather Service stations, and investigated the role of large-scale climate patterns such as the Pacific Decadal Oscillation and El Nino on the weather and climate of central Alaska. This research is pivitol for our interpretation of the deep (1000 year-long) ice core collected from Mt. Hunter in Denali National Park in May-June 2013 as part of our NSF-funded grant to study central Alaskan paleoclimate. Hazel conducted fieldwork to collect weather station data and snowpit samples on the Kahiltna Glacier in May 2012 (pictured).

Elle AndersonElle Anderson, Dartmouth College Senior Thesis (May, 2011)

Elle completed her honors thesis with me analyzing part of an ice core from Greenland drilled in the summer of 2010 as part of our Greenland spatial variability project. Elle investigated the signature of the North Atlantic Oscillation (NAO) using sea-salt concentrations in the core analyzed by ion chromatography. Her analysis largely supported previous research on older ice cores, which is important given recent debate about the behavior of the NAO during the Medieval Climate Anomaly. Elle is currently working for Strava in San Francisco, CA.

Amy BurzynskiAmy Burzynski, Dartmouth College Senior Thesis (May, 2011)

Amy completed her senior honors thesis with me investigating the relationship between aerosol concentration and snow chemistry at two ice core sites in Denali National Park; Mt. Hunter Plateau (3900 m) and Kahiltna Pass Basin (3050 m). These cores were collected as part of our North Pacific paleoclimate research in 2008 and 2010. Amy found important statistical relationships between snow chemistry and aerosol chemistry measured nearby. Her research will be key to our interpretation of the deep ice core collected from Mt. Hunter in June, 2013. After working at CRREL since graduation, Amy will begin a MSc at the University of Northern Colorado with Steve Anderson in September 2013.

Tom Callahan, Dartmouth College Senior Thesis (May, 2010)

Tom used the Mt. Logan and Eclipse ice cores to investigate the behavior of the Pacific Decadal Oscillation (PDO) over the past 300 years by calibrating local meteorological station data to accumulation rate and d18O data from the two sites. Tom was also part of our expedition to Denali in May, 2009, where he assisted in collecting snow pit samples, ice penetrating radar data, downloading weather station data, and reseting the station for another year of data collection.

Matthew Siegfried, Dartmouth College MSc (May, 2010)

I was a member of Matt's MSc committee for his research with Bob Hawley calibrating and validating satellite laser altimetry data from the ICESat satellite. He used monthly DGPS data from Summit, Greenland in the middle of the Greenland Ice Sheet to determine the errors associated with ICESat measurements of the ice surface, which are essential for understanding the present rate of ice volume loss or accumulation in Greenland. He evaluated the cross-track slope correction algorithms, and the estimates of return energy bias from the ice surface. Matt is currently a PhD student at Scripps working with Helen Fricker on the WISSARD project.

Anna Lugosch-Ecker, Dartmouth College Senior Thesis (May, 2010)

Anna investigated the climatological controls on the mobilization and trans-Pacific transport of dust from Asian deserts to the North Pacific region using NCEP/NCAR reanalysis data, instrumental dust data, and the Mt. Logan PR Col ice core dust concentration dataset. By understanding the modern controls on dust concentration in the ice core, Anna used the ice core record to better understand climate conditions in Asia and the North Pacific over the Holocene. She is currently working on a publication based on her thesis research. 

Tina Praprotnik, Dartmouth College Senior Thesis (May, 2009)

Tina completed a senior thesis project investigating sources and trends of Asian lead (Pb) pollution in the North Pacific atmosphere based on Pb concentration and Pb isotope data from the Mt. Logan and Eclipse Icefield ice cores (Yukon, Canada). These samples were analyzed using ICP-MS and TIMS techniques, and Tina also used an airmass back-trajectory model (HYSPLIT) as part of her analyses. Tina was a member of our research expedition to Peyto Glacier (Alberta, Canada) in July, 2008, where she collected glaciochemical samples and helped Dom Winski collect ice penetrating radar and GPS data for his thesis project. Tina is currently a JD and master's of environmental management student at the Duke University Nicholas School for the Environment.

Dom Winski, Dartmouth College Senior Thesis (May, 2009)

I co-advised Dom on his senior thesis project with Dr. Hawley at Dartmouth. Dom investigated recent changes in the volume of Peyto Glacier in Alberta, Canada. He used ice penetrating radar, generously loaned by Dr. Arcone from CRREL, to determine the modern volume of the glacier tounge and compare it with two previous published volume estimates from the 1980s and the 1960s collected by Gerry Holdsworth. Dom was able to collect his own ice-penetrating radar and GPS data from the Peyto Glacier during our July, 2008 expedition. Bob Hawley presented this research at the 2009 AGU Fall Meeting, and we recently published a paper on the results.

Ben Gross, University of Maine MSc (May, 2009)

I worked with Ben, who was advised by Dr. Kreutz at UMaine, on his Master's project investigating the history and sources of Pb pollution in the North Pacific. Ben measured Pb isotopes on ice core samples from the Eclipse Site in the Saint Elias Mountains to determine if they have a similar Asian source as the nearby Mt. Logan summit plateau, or if the source is more Eurasian (former USSR) in origin. Ben collected samples for his research from Mt. Logan on an expedition with Gerry Holdsworth in 2007, and was part of the Denali ice core site reconaissance team in the summer of 2008. Ben also spent the winter of 2010-11 at Summit Greenland Obervatory in the middle of the Greenland Ice Sheet as a Science Technician.

Sarah Stearn, Dartmouth College Senior Project (May, 2008)

Sarah helped Mukul Sharma and I develop our laboratory and TIMS instrumental methodoligy for measuring lead isotope ratios on small volumes (~3-5 ml) of very low-concentration snow and ice samples from Mt. Logan. Sarah is currently working in the Boston area for a pharmaceutical and biotech consulting firm.