People


Current Lab Members: Karen FreyKristen Shake | Ashley York | Melishia Santiago | Luisa Young | Anela Layugan
Former Lab Members: Warren Scott | Samuel Berman | Emily Sturdivant | Luke Trusel | Dylan Broderick | Meghan Helmberger | Prajjwal Panday | Christie Wood Logvinova | Blaize Denfeld | Claire Griffin | Katherine Willis

Current Lab Members:



FreyKaren Frey, Associate Professor
Ph.D., Geography, University of California Los Angeles (2005)
M.A., Geography, University of California Los Angeles (2000)
B.A., Geological Sciences, Cornell University (1998)
Detailed CV
Karen’s research interests involve the combined use of field measurements, satellite remote sensing, and GIScience to study large-scale linkages between land, atmosphere, ocean, and ice in polar environments. Over the past decade, she has conducted field-based research in West and East Siberia, the North Slope of Alaska, as well as the Bering, Chukchi, and Beaufort Seas. Her most recent work focuses on the hydrological and biogeochemical impacts of terrestrial permafrost degradation across Siberia as well as the biological and biogeochemical impacts of sea ice decline in polar shelf environments. She has served as the major research adviser for numerous extremely talented Ph.D., M.S./M.A., and B.A. students who have worked on projects in Siberia, Alaska, West Antarctica, Greenland, the Himalayas, and the Bering/Chukchi/Beaufort Seas.

Kristen Shake, Ph.D. Candidate
M.S., Chemical Oceanography, University of Alaska Fairbanks (2011)
B.S., Geography/Environmental Studies, University of Alaska Fairbanks (2009)
Detailed CV
Kristen’s research is centered upon the fields of legal geography and polar climate change. She is interested by themes of human presence and absence in the polar regions and how these are linked to climate related drivers of change to legal spaces in both terrestrial and marine environments. Her research specifically investigated the legal presence of sea ice in the greater Pacific- Arctic region and how this connects to larger issues of sovereignty, resource extraction operations, and legal issues surrounding marine and environmental safety infrastructure in an increasingly sea ice-free Arctic. Kristen’s personal website is located here.

YorkAshley York, Ph.D. Candidate
M.S., Applied Geospatial Sciences, Northern Arizona University (2013)
B.S., Geography/Statistics, University of Nevada Reno (2010)
Detailed CV
Ashley’s main research interests include remote sensing of the cryosphere and glaciology. She is particularly interested in the combination of remote sensing and ground-based methods for calibration and validation between the two techniques. At Clark, Ashley is looking at ocean-ice-atmosphere interactions, particularly the relationship of sea surface temperature and sea ice variability in outlet glacier behavior in the Disko Bay region of West Greenland, through the analysis of satellite time series and ice core data.

Melishia Santiago, Ph.D. Candidate
M.S., Biogeography, University of Massachusetts Amherst (2011)
B.S., Biology, University of Massachusetts Amherst (2008)
Detailed CV
Melishia’s research interests include the study of Arctic marine environments, biogeochemical cycling, and the combined use of field measurements and satellite remote sensing. At Clark, her current research investigates the distribution and variability of chromophoric dissolved organic matter (CDOM) in the Chukchi and Beaufort seas of the Pacific Arctic region. More generally, she is interested in the biogeochemical impacts of sea ice decline in the western Arctic Ocean.

Luisa Young, Ph.D. Student
M.S., Geographic Information Science for Development and Environment, Clark University (2013)
B.S., Natural Resources & Environmental Management, University of Hawaii at Manoa (2010)
Detailed CV
Luisa’s research interests include land change science, water resources, ecological modeling and the use of remote sensing technology for environmental applications.  She is interested in the interactions between climate change, natural disasters and humans-environment systems.  At Clark, she has been able to expand her horizons to polar systems working on atmospheric, oceanographic and time series analysis.  Luisa entered the Ph.D. program in Fall 2016 after several years of experience in the Graduate School of Geography as an RA and TA in the fields of GIScience and Remote Sensing.

Anela Layugan, M.S. Student
B.A., Environmental Science/Earth System Science, Clark University (2017)
Detailed CV
Anela’s interests include oceanography and applications of GIScience and remote sensing technology for Earth System Science research. She is particularly interested in the role that sea ice plays in the Arctic System, including the ice-albedo feedback and phytoplankton blooms. At Clark, she is conducting change-point analysis on sea ice in the Arctic using satellite time series data. Using this research, she hopes to help develop a change-point analysis methodology that can be incorporated into existing GIScience software.

 

Former Lab Members:


WScott Warren Scott
M.S., GIScience, Clark University (2017)
B.A., Geography, Clark University (2016)
While at Clark, “Wren” was interested in how global environmental change can be monitored and observed in the Arctic and Antarctic regions. In particular, his interests included using remotely sensed imagery to assess and quantify the changes taking place to glaciers, ice sheets and sea ice in the Arctic and Antarctic regions. At Clark, he used remotely sensed data to examine the effects of changing sea ice cover on phytoplankton bloom dynamics in the Beaufort and Bering seas. As of Fall 2017, Wren is pursuing a Ph.D. in the Department of Geography at the University of Utah, working with Dr. Rick Forster.

SamBermanSamuel Berman
M.S., GIScience, Clark University (2015)
B.A., Environmental Science/Earth System Science, Clark University (2014)
Sam’s research at Clark took him to East Siberia in both 2012 and 2013, where he investigated carbon cycling in thermokarst lakes for his B.A. senior honors thesis. In particular, Sam incorporated both field measurements and modeling to estimate the total store of dissolved organic carbon in multiple lakes within a small watershed near Cherskiy, East Siberia. For his M.S. thesis research, Sam participated in two cruises onboard the Canadian Coast Guard Sir Wilfred Laurier icebreaker in 2014 and 2015 where he studied the distribution of chromophoric dissolved organic matter throughout the Bering and Chukchi seas in the Pacific Arctic region. Sam is currently a member of the Market Analytics team at Daymark Energy Advisors in Boston, MA.

Emily3Emily Sturdivant
M.S., GIScience, Clark University (2015)
B.A., Geography, Clark University (2013)
Emily’s participation in the Polaris Project in East Siberia during summer 2011 triggered a passion for Arctic Science. While in the field, she focused on measurements of gas fluxes from inland water surfaces. After that experience, she focused her research for both her B.A. honors thesis and M.A. thesis on detecting the timing of snowmelt onset across the Alaskan North Slope using satellite radar scatterometer data (using both QuikSCAT and ASCAT time series). While at Clark, Emily acquired a full suite of GIS competencies, such as ArcGIS and Python programming, and remote sensing skills including landcover classification and time series analysis. Emily is currently employed as a Geographer at the U.S. Geological Survey in Woods Hole, MA.

LukeTruselLuke Trusel
Ph.D., Geography, Clark University (2014)
M.S., Geology, Northern Illinois University (2009)
B.S., Geology, University of Massachusetts Amherst (2006)
Luke’s interests at Clark were focused on glaciology, remote sensing of the cryosphere, and glacial marine processes and dynamics; in particular, his interests were in applying remote sensing and ground based geophysical methods to better characterize physical processes and to understand their implications. His Ph.D.research included quantifying surface melting across the Antarctic using time series of microwave satellite data. This work included development of a new metric to characterize the intensity of surface melting and the examination of Antarctic ice sheet-ocean relationships. After Luke earned his Ph.D. at Clark, he continued on to the Woods Hole Oceanographic Institution as a Postdoctoral Scholar. Currently, Luke is an Assistant Professor in the Department of Geology at Rowan University. His research webpage can be accessed here.

DylanBroderickDylan Broderick
M.A., GIScience, Clark University (2013)
B.A., Geography, Clark University (2012)
While at Clark, Dylan was interested in terrestrial carbon stocks of the Arctic, particularly in East Siberia where she participated as a member of the Polaris Project in 2011 and 2012. She had interests in the use of remote sensing and GIS to identify patterns and trends of carbon storage across the landscape. Her M.A. research used carbon stock measurements collected in the field in combination with satellite imagery to predict the amount of carbon stored within sub-watersheds of the Kolyma River basin in East Siberia. Currently, Dylan is a Staff Scientist/GIS Specialist at The Johnson Company, an Environmental Science and Engineering consulting firm in Montpelier, VT.

MeghanHelmbergerMeghan Helmberger
Ph.D., Geography, University of Colorado Boulder (Current Student)
M.S., Environmental Science & Policy, Clark University (2013)
B.A., Environmental Science & Policy and Studio Art, Clark University (2012)
While at Clark, Meghan was interested in studying a variety of aspects of the Arctic, including interests in the use of GIS to understand spatial patterns in environmental change. For her M.S. research, she investigated the spatial and temporal variability of lake biogeochemistry across the Alaskan North Slope, focusing mainly on the quantity and quality of chromophoric dissolved organic matter (CDOM) in these freshwaters. Currently, Meghan is a Ph,D, student in the Department of Geography at the University of Colorado Boulder, working with Dr. Mark Serreze to investigate patterns of the surface energy balance across the Arctic Ocean over the past 40 years.

PrajjwalPandayPrajjwal Panday
Ph.D., Geography, Clark University (2013)
M.S., Environmental Science, SUNY College of Environmental Science & Forestry (2007)
B.S., Chemistry/Environmental Studies, St. Lawrence University (2005)
Prajjwal’s research at Clark University focused on understanding cryospheric and hydrologic processes in mountainous  environments. His dissertation focused on utilizing remote sensing and field-based observations to understand, assess, and monitor these processes, particularly on snow-covered areas and downstream water resources  in the Hindu-Kush Himalayan region. Since graduating from Clark, Prajjwal served as a Postdoctoral Fellow at the Woods Hole Research Center as well as a Visiting Assistant Professor in the Graduate School of Geography at Clark University.  Currently, Prajjwal is an Assistant Professor of Environmental Science at Nichols College and can be found here.

CWoodChristie Wood Logvinova
M.A., Geography, Clark University (2012)
M.S., Physical Oceanography, MIT/WHOI Joint Program in Oceanography (2007)
B.S., Mathematics/Earth, Atmospheric and Planetary Sciences, MIT (2005)
At Clark, Christie was interested in how variations in climate impact the Arctic marine system. In particular, she was looking at how changes in Arctic sea ice affect the ecology and biogeochemistry of the Arctic Ocean. Her research focused on understanding the impacts of sea ice decline in the Chukchi and Beaufort seas on the dynamics of dissolved organic matter, which plays an important role in the marine ecosystem as both a carbon source for the microbial food web and as an inhibitor of light. This work was carried out through field measurements and lab experiments.

BlaizeDenfeldBlaize Denfeld
Ph.D., Department of Ecology and Genetics/Limnology, Uppsala University (2016)
M.A., GIScience, Clark University (2011)

B.A., Earth System Science (minor in Geography), Clark University (2010)
Blaize spent two summers (2009 and 2010) researching the biogeochemistry of the Kolyma River basin in Northeast Siberia as a participant in the Polaris Project. Her research combined field measurements and remotely sensed imagery to examine regional carbon cycle dynamics (and in particular, how physical and biogeochemical properties drive CO2 evasion from streams and rivers). Blaize was selected for a prestigious Ph.D. fellowship (beginning September 2011) to continue her research in Arctic carbon cycling and limnology in the Department of Ecology and Genetics at Uppsala University in Sweden.  She is now a Postdoctoral Researcher at Umea University in Sweden.

ClaireGriffinClaire Griffin
Ph.D., Marine Science, University of Texas at Austin (2016)
B.A., Geography (minor in Environmental Science), Clark University (2010)

Claire is a former undergraduate researcher in the Polar Science Research Laboratory (and Polaris Project 2009 alumna), whose research focused on combining field measurements and satellite observations of dissolved organic matter in East Siberian rivers. Claire completed the Ph.D. program at the Marine Science Institute, University of Texas at Austin where she was an NSF Graduate Research Fellow. Working with Dr. Jim McClelland, she continued her research in Arctic river biogeochemistry and satellite remote sensing.  Claire is currently a Postdoctoral Associate working with Dr. Jacques Finlay in the Department of Ecology, Evolution and Behavior at the University of Minnesota.

KateWillisKatherine Willis
Ph.D., Geography, University of California Los Angeles (2016)

M.A., Geography, University of California Los Angeles (2011)
B.A., Environmental Science (minor in Mathematics), Clark University (2008)
Kate is a former undergraduate researcher in the Polar Science Research Laboratory (and Polaris Project 2008 alumna), now in the Ph.D. program in the Department of Geography at UCLA where she has worked with both Dr. Glen Macdonald and Dr. Tom Gillespie. Her dissertation is entitled: “Assessing landscape dynamics using remote sensing for ecological conservation” and has research interests focused on land use change, climate change, remote sensing, protected areas, and GIS.  Kate is currently working in the Massachusetts Bay Transportation Authority (MBTA) Customer Technology Department to map, design and implement a new automated fare collection system in the Greater Boston area.