• 2016 Snow Melt in the NGEE-Arctic Teller Research Watershed

      Busey, Robert; Wilson, Cathy; Iwahana, Go; Bolton, W. Robert; Cohen, Lily (2016-12)
      In April 2016, daily transects were made across the Teller Road Basin to begin the several year process of characterizing the largest event in the northern hydrologic year: snow melt. This year was an experiment to see how much could be accomplished (a full suite of time intensive measurements) during this interval.
    • Alaska Earthquakes Poster

      Gardine, Lea; West, Michael; Grassi, Beth (2020-10)
      Alaska is one of the most seismically active places in the world. This poster connects the geographic distribution of earthquakes from the Alaska Earthquake Center catalog with the core concepts that drive Alaska seismicity. Rupture patches, how plate tectonics forms faults throughout Alaska, and how the angle of the sinking Pacific Plate affects earthquake distribution and creates volcanoes are some of the key concepts represented.
    • Alaska Native People: Diet, Westernization and Health

      White, Sasha; Smoak, Daniel; Podlutsky, Andrej (2014-04-29)
      Prior to westernization, the Alaska Native diet was one that included high omega-3 fatty acids and proteins and low in saturated fats and cholesterol. This may or may not provide protection against certain diseases. As westernization continues to changes the diet with each new generation, it is of great interest as to how it affects Alaska Native health. Alaska Native health has declined substantially within the last decade, and seems to continuously decline at an alarming rate. Investigating both the changing diet and the effects on Alaska Native health may provide a possible cause for this increasing health problem.
    • Alaska Wilderness Stories

      Navio, Nikki Nice; Hirsh, Aviva (2014-04-29)
    • Alaskan Lowbush Cranberry Extends Lifespan in C. elegans

      Lipscomb, Justina (2014-04-29)
      I tested the hypothesis that lowbush cranberries affect healthy aging in a dose dependent manner. This was done by observing the effect of cranberry extract on the lifespan of wildtype Caenorhabditis elegans. Results of the project may be useful in understanding what components of botanicals extend lifespan and provide neuronal protection. Using Alaskan botanicals provides a local focus, as well as having ethnobotanical value in studying the medical potential of traditional foods. The effect of lowbush cranberry was tested by running C. elegans lifespans at various concentrations of botanical extract. The extract was also tested for anthocyanin concentration, to provide insight on how anthocyanin affects healthy aging.
    • Arctic Ecosystem Changes from Gloal Community Earthc System Model (CESM) and Regional Arctic System Model (RASM)

      Jin, Meibing; Deal, Clara; Maslowski, Wieslaw; Roberts, Andrew; Marina, Frants; Robert, Osinski; Craig, Anthony (2016-02)
      The Arctic Ocean is currently experiencing rapid and large environmental changes related to global warming. Many small scale physical processes, such as mesoscale eddies, mixed layer dynamics, ocean boundary and coastal currents, varying sea ice edges, upwelling can influence nutrient transport, light availability and ocean stratification, thus are critical for understanding marine primary production and carbon cycling in the Arctic Ocean. A high-resolution pan-Arctic regional earth system model (RASM) was developed to investigate the ecosystem response to climate changes in seasonal to decadal scales. Here we show some initial results from the high resolution ecosystem model and comparison with results from coarse resolution global community earth system model. Both models include coupled ice algal submodel at the bottom of sea ice and intermediate NPZD pelagic ecosystem submodel in water column.
    • Arctic Storm Activities in Ensemble Simulations by the HIRHAM-NAOISM Regional Coupled Climate Model

      Yang, Yang; Zhang, Xiangdong; Rinke, Annette (2016-12)
      Arctic storm activities have shown intensification during recent decades, which may have contributed to or caused extreme climate events. We examined Arctic storm activities in 10 ensemble simulations by using the Arctic regional coupled climate model HIRHAM-NAOSIM. Storm identification and tracking algorithm (Zhanget al., 2004) were employed to derive intensity, location and duration of each storm. Arctic regional storm climatology and variability were constructed and compared with the same statistics derived from the ERA-interim reanalysis data.
    • Assimilation of High-Frequency Radar Data in the East Chukchi Sea

      Stroh, J.; Panteleev, G. G.; Yaremchuk, M.; Weingartner, T. (2014-03)
      The maximum-likelihood ensemble filter (MLEF) is an eficient technique of data assimilation related to both 3D-variational (3Dvar) and Ensemble Kalman Filter (EnKF) methods. We demonstrate the utility of MLEF by assimilating high-frequency radar (HFR) data into a realistic model of the east Chukchi Sea. A set of three radar stations in Wainwright, Point Lay, and Barrow provide two-dimensional resolution of the sea-surface velocity. We use MLEF to incorporate this HFR data into a numerical model constructed using the Regional Ocean Modelling System (ROMS) for the ice-free months of 2012. The resulting analysis can be used as a benchmark for future operational forecasting, allowing for better real-time monitoring and decision-making as this biologically rich region is influenced by industry and commerce.
    • Attitudes, Knowledge, and Beliefs on Cancer and its Prevention in Northwestern Rural Alaska

      Schmidt, Jenna (2012)
      Rural Alaskans face unique challenges in accessibility. Most villages and cities are not connected to road systems, limiting travel between rural and urban areas. This also limits connectivity between small communities. Residents rely heavily on air travel. The accessibility of health care and education is limited due to geographical isolation of communities (State of Alaska, 2006). The State of Alaska Department of Health and Social Services (2009) cites cancer as the leading cause of death in Alaska since 1993. Early detection and treatment is key as it reduces the risk of mortality due to different forms of cancer. Accessibility of cancer education, screening, treatment, and other needs are restricted by cost and the availability of transportation (State of Alaska, 2006). This study aims to provide regionally relevant information focusing on current Northwestern rural Alaskan knowledge, beliefs, and perspectives on cancer and its prevention. Assessment of these topics will provide useful information to rural Alaskan health care providers. The information can be used by these providers to focus their resources toward needed areas. This can help in the provision of a tailored health education approach, which may increase effectiveness of educational communication to each distinct community.
    • Body Image and Disordered Eating Among UAF Female Athletes and Non-Athletes

      Montgomery, Jordyn (2012)
      •Disordered eating and poor body image is a problem in our society for many women •Most eating disorder patients are young females, and female athletes may be particularly at risk •Disordered eating is often associated with perfectionism, poor mental health, and other health-risk behaviors •This research explored associations between eating behavior, body image, perfectionism, depression, binge drinking, and alcohol consequences in a sample of female athletes and non-athletes •Analyses were conducted to determine differences in these variables between athletes and non-athletes, and between sports in the subsample of athletes
    • Carbon exchange rates in Polytrichum juniperinum moss of burned black spruce forest in interior Alaska

      Kim, Yongwon; Kodama, Y.; Iwata, H.; Kim, S.-D.; Shim, C.; Kushida, K.; Harazono, Y. (2013-01)
      Boreal black spruce forest is highly susceptible to wildfire, and postfire changes in soil temperature and substrates have the potential to shift large areas of such ecosystem from a net sink to a net source of carbon. In this paper, we examine CO2 exchange rates (e.g., NPP and Re) in juniper haircap moss (Polytrichum juniperinum) and microbial respiration in no-vegetation conditions using an automated chamber system at 5-year burned black spruce forest in interior Alaska during the fall season of 2009. Mean microbial respiration and NEP (net ecosystem productivity) of juniper haircap moss were 0.73 ± 0.36 and 0.75 ± 1.04 mgC/m2/min, respectively. CO2 exchange rates and microbial respiration showed temporal variations with fluctuation in air temperature during the fall season, suggesting the temperature sensitivity of juniper haircap moss and soil microbes after fire. During the 45-day fall period, mean NEP of P. juniperinum moss was 0.49 ± 0.28 MgC/ha after 5-year-old forest fire. On the other hand, simulated microbial respiration normalized to a 10 °C temperature might be stimulated by as much as 0.40 ± 0.23 MgC/ha. These findings demonstrate that fire-pioneer species juniper haircap moss is a net C sink in burned black spruce forest of interior Alaska.
    • A “CASE” Study on Developing Science Communication and Outreach Skills of University Graduate Student Researchers in Alaska

      Tedesche, Molly E.; Conner, Laura; Danielson, Jennifer (2015-12)
      Well rounded scientific researchers are not only experts in their field, but can also communicate their work to a multitude of various audiences, including the general public and undergraduate university students. Training in these areas should ideally start during graduate school, but many programs are not preparing students to effectively communicate their work. Here, we present results from the NSF-funded CASE (Changing Alaska Science Education) program, which was funded by NSF under the auspices of the GK-12 program. CASE placed science graduate students (fellows) in K-12 classrooms to teach alongside of K-12 teachers with the goal of enhancing communication and teaching skills among graduate students. CASE trained fellows in inquiry-based and experiential techniques and emphasized the integration of art, writing, and traditional Alaska Native knowledge in the classroom. Such techniques are especially effective in engaging students from groups that are underrepresented in science.
    • Central CO2/pH Chemosensitivity Influence on Respiration in both Early and Late Staged Tadpoles

      Tackett, Alex (2012)
      We test the hypothesis that central respiratory CO2/pH chemosensitivity, recorded from isolated brainstems, remains consistent throughout tadpole development. Results indicate that tadpoles at all developmental stages respond to CO2/pH, and that the sensitivity of these responses does not change with development.
    • Changes in Respiratory CO2 Chemosensitivity Using Early- and Late-Stage Tadpoles

      Nesteby, Andrea K. (2012)
      Isolated tadpole brainstems provide a robust model for quantifying central respiratory CO2 chemosensitivity. Whole-nerve recordings were used to identify respiratory responses of early and late-stage tadpoles to different CO2 levels in order to characterize the sensitivity of different developmental stages to respiratory stimuli. Some significance has been determined when comparing baseline and individual treatment values; however, further research needs to be done in order to fully characterize the CO2 influence on respiration.