Search Results - "Tweedie, C."

Patterns and Drivers of Carbon Dioxide Concentrations in Aquatic Ecosystems of the Arctic Coastal Tundra by Lougheed, V. L., Tweedie, C. E., Andresen, C. G., Armendariz, A. M., Escarzaga, S. M., Tarin, G.

“…Multiple aquatic ecosystems (pond, lake, river, lagoon, and ocean) on the Arctic Coastal Plain near Utqiaġvik, Alaska, USA, were visited to determine their…”
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Quantifying and relating land-surface and subsurface variability in permafrost environments using LiDAR and surface geophysical datasets by Hubbard, S. S., Gangodagamage, C., Dafflon, B., Wainwright, H., Peterson, J., Gusmeroli, A., Ulrich, C., Wu, Y., Wilson, C., Rowland, J., Tweedie, C., Wullschleger, S. D.

“…The value of remote sensing and surface geophysical data for characterizing the spatial variability and relationships between land-surface and subsurface…”
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Nonlinear controls on evapotranspiration in arctic coastal wetlands by Liljedahl, A. K., Hinzman, L. D., Harazono, Y., Zona, D., Tweedie, C. E., Hollister, R. D., Engstrom, R., Oechel, W. C.

“…Projected increases in air temperature and precipitation due to climate change in Arctic wetlands could dramatically affect ecosystem function. As a…”
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Enhanced Stiffness of Amorphous Polymer Surfaces under Confinement of Localized Contact Loads by Tweedie, C. A., Constantinides, G., Lehman, K. E., Brill, D. J., Blackman, G. S., Van Vliet, K. J.

“…For contact depths < 200 nm from the free surface of amorphous polymers, the apparent mechanical stiffness is in excess of bulk elastic properties. This…”
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Remote sensing of tundra gross ecosystem productivity and light use efficiency under varying temperature and moisture conditions by Huemmrich, K.F, Gamon, J.A., Tweedie, C.E., Oberbauer, S.F., Kinoshita, G., Houston, S., Kuchy, A., Hollister, R.D., Kwon, H., Mano, M., Harazono, Y., Webber, P.J., Oechel, W.C.

“…Satellite observations have shown greening trends in tundra in response to climate change, suggesting increases in productivity. To better understand the…”
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Quantitative Impact Testing of Energy Dissipation at Surfaces by Constantinides, G., Tweedie, C. A., Savva, N., Smith, J. F., Van Vliet, K. J.

“…Impact testing with nanoscale spatial, force, and temporal resolution has been developed to address quantitatively the response of surfaces to impingement of…”
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Tundra vegetation change near Barrow, Alaska (1972-2010) by Villarreal, S, Hollister, R D, Johnson, D R, Lara, M J, Webber, P J, Tweedie, C E

“…Knowledge of how arctic plant communities will respond to change has been largely derived from plot level experimental manipulation, not from trends of decade…”
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Climate and nutrient effects on Arctic wetland plant phenology observed from phenocams by Andresen, C.G., Tweedie, C.E., Lougheed, V.L.

“…This study explores how climate and nutrients influence productivity of arctic wetland plants. The Green-excess Index (GEI) derived from Red, Green and Blue…”
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Combinatorial Material Mechanics: High-Throughput Polymer Synthesis and Nanomechanical Screening by Tweedie, C. A., Anderson, D. G., Langer, R., Van Vliet, K. J.

“…Combinatorial materials science requires parallel advances in materials characterization. A high‐throughput nanoscale synthesis/nanomechanical profiling…”
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High spatial resolution decade-time scale land cover change at multiple locations in the Beringian Arctic (1948-2000s) by Lin, D H, Johnson, D R, Andresen, C, Tweedie, C E

“…Analysis of time series imagery from satellite and aircraft platforms is useful for detecting land cover change at plot to regional scales. In this study, we…”
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Exclusion of brown lemmings reduces vascular plant cover and biomass in Arctic coastal tundra: resampling of a 50 + year herbivore exclosure experiment near Barrow, Alaska by Johnson, D R, Lara, M J, Shaver, G R, Batzli, G O, Shaw, J D, Tweedie, C E

“…To determine the role lemmings play in structuring plant communities and their contribution to the ‘greening of the Arctic’, we measured plant cover and…”
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Water, climate, and social change in a fragile landscape by Hargrove, W. L, Borrok, D. M, Heyman, J. M, Tweedie, C. W, Ferregut, C

“…We present here and in the companion papers an analysis of sustainability in the Middle Rio Grande region of the U.S.-Mexico border and propose an…”
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Estimated change in tundra ecosystem function near Barrow, Alaska between 1972 and 2010 by Lara, M J, Villarreal, S, Johnson, D R, Hollister, R D, Webber, P J, Tweedie, C E

“…How the greening of Arctic landscapes manifests as a change in ecosystem structure and function remains largely unknown. This study investigates the likely…”
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Towards an International Polar Data Coordination Network by Pulsifer, P L, Yarmey, L, Godøy, Ø, Friddell, J, Parsons, M, Vincent, W F, Bruin, T de, Manley, W, Gaylord, A, Hayes, A, Nickels, S, Tweedie, C, Larsen, J R, Huck, J

“…Data management is integral to sound polar science. Through analysis of documents reporting on meetings of the Arctic data management community, a set of…”
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A Mobile Instrumented Sensor Platform for Long-Term Terrestrial Ecosystem Analysis: An Example Application in an Arctic Tundra Ecosystem by Healey, N C, Oberbauer, S F, Ahrends, H E, Dierick, D, Welker, J M, Leffler, A J, Hollister, R D, Vargas, S A, Tweedie, C E

“…To address impacts of climate change on natural ecosystems, researchers need efficient and integrated ground- based sensor systems capable of detecting plant…”
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Multiscale Creep Compliance of Epoxy Networks at Elevated Temperatures by Juliano, T. F., VanLandingham, M. R., Tweedie, C. A., Van Vliet, K. J.

“…Epoxy networks are thermoset polymers for which an important structural length scale, molecular weight between crosslinks (M c), influences physical and…”
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A standardised approach towards PROving the efficacy of foods and food constituents for health CLAIMs (PROCLAIM): providing guidance by Gallagher, Alison M., Meijer, Gert W., Richardson, David P., Rondeau, Virginie, Skarp, Maria, Stasse-Wolthuis, Marianne, Tweedie, Guy C., Witkamp, Renger

“…Diet is well known to have beneficial health properties that extend beyond traditionally accepted nutritional effects. The approach involved in elucidating…”
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Experiment, monitoring, and gradient methods used to infer climate change effects on plant communities yield consistent patterns by Elmendorf, Sarah C., Henry, Gregory H. R., Hollister, Robert D., Fosaa, Anna Maria, Gould, William A., Hermanutz, Luise, Hofgaard, Annika, Jónsdóttir, Ingibjörg I., Jorgenson, Janet C., Lévesque, Esther, Magnusson, Borgþór, Molau, Ulf, Myers-Smith, Isla H., Oberbauer, Steven F., Rixen, Christian, Tweedie, Craig E., Walker, Marilyn

“…Inference about future climate change impacts typically relies on one of three approaches: manipulative experiments, historical comparisons (broadly defined to…”
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The Case of the Missing Veterans: Roman Colonisation and Veteran Settlement in the Second Century B.C by Tweedie, Fiona C

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Reproductive aging in the Djungarian hamster, Phodopus campbelli by Edwards, H E, Tweedie, C J, Terranova, P F, Lisk, R D, Wynne-Edwards, K E

“…Changes in fertility (delivery success), fecundity (litter size and weaning success), sensitivity to pregnancy-blocking stimuli (mate removal after 24 h), and…”
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