Search Results - "Webster, CR"

Minimum opening sizes for canopy recruitment of midtolerant tree species: a retrospective approach by Webster, Christopher R., Lorimer, Craig G.

“…Minimum opening sizes and time required for successful canopy recruitment of tree saplings are not well known because the gap capture process is slow and…”
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Ocular Features and Clinical Approach to Cataract and Corneal Refractive Surgery in Patients with Myotonic Dystrophy by Moshirfar, Majid, Webster, Court R, Seitz, Tanner S, Ronquillo, Yasmyne C, Hoopes, Phillip C

“…Myotonic dystrophy is the most common inherited muscular dystrophy in adults and presents as two forms, type 1, and type 2. Ocular manifestations such as…”
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Potential for Multiple Lag Phases during Biotic Invasions: Reconstructing an Invasion of the Exotic Tree Acer platanoides by Wangen, Steven R., Webster, Christopher R.

“…1. Perennial woody invaders often form persistent patches that significantly alter the structure and composition of native plant communities. Given their long…”
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Long-term response of spring flora to chronic herbivory and deer exclusion in Great Smoky Mountains National Park, USA by Webster, Christopher R., Jenkins, Michael A., Rock, Janet H.

“…Chronic herbivory by white-tailed deer ( Odocoileus virginianus Zimmerman) can have profound impacts on the function and structure of forest ecosystems. We…”
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Simulations of water isotope abundances in the upper troposphere and lower stratosphere and implications for stratosphere troposphere exchange by Gettelman, Andrew, Webster, Christopher R.

“…An analytic model of transport and microphysics in the tropical tropopause layer (TTL) is extended to include stable isotopes of water. The model, running…”
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Effects of uneven-aged management on diameter distribution and species composition of northern hardwoods in Upper Michigan by Schwartz, Joseph W., Nagel, Linda M., Webster, Christopher R.

“…Uneven-aged management using single-tree or group selection has been in practice for many decades, especially in northern hardwood forests. Use of stocking…”
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Mean ages of stratospheric air derived from in situ observations of CO2, CH4, and N2O by Andrews, A. E., Boering, K. A., Daube, B. C., Wofsy, S. C., Loewenstein, M., Jost, H., Podolske, J. R., Webster, C. R., Herman, R. L., Scott, D. C., Flesch, G. J., Moyer, E. J., Elkins, J. W., Dutton, G. S., Hurst, D. F., Moore, F. L., Ray, E. A., Romashkin, P. A., Strahan, S. E.

“…Accurate mean ages for stratospheric air have been derived from a spatially and temporally comprehensive set of in situ observations of CO2, CH4, and N2O…”
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Validation of Aqua satellite data in the upper troposphere and lower stratosphere with in situ aircraft instruments by Gettelman, A., Weinstock, E. M., Fetzer, E. J., Irion, F. W., Eldering, A., Richard, E. C., Rosenlof, K. H., Thompson, T. L., Pittman, J. V., Webster, C. R., Herman, R. L.

“…Aircraft observations from a recent campaign spanning 0–40N latitude are compared to coincident observations from satellite sensors on board the Aqua satellite…”
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Coarse woody debris dynamics in the southern Appalachians as affected by topographic position and anthropogenic disturbance history by Webster, Christopher R., Jenkins, Michael A.

“…We examined the influence of topography and anthropogenic disturbance associated with European settlement in the southern Appalachian Mountains of Tennessee on…”
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Hydrogen Radicals, Nitrogen Radicals, and the Production of O$_3$ in the Upper Troposphere by Wennberg, P. O., Hanisco, T. F., Jaeglé, L., Jacob, D. J., Hintsa, E. J., Lanzendorf, E. J., Anderson, J. G., R.-S. Gao, Keim, E. R., Donnelly, S. G., Del Negro, L. A., Fahey, D. W., McKeen, S. A., Salawitch, R. J., Webster, C. R., May, R. D., Herman, R. L., Proffitt, M. H., Margitan, J. J., Atlas, E. L., Schauffler, S. M., Flocke, F., McElroy, C. T., Bui, T. P.

“…The concentrations of the hydrogen radicals OH and HO$_2$ in the middle and upper troposphere were measured simultaneously with those of NO, O$_3$, CO, H$_2$O,…”
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Hydrogen radicals, nitrogen radicals, and the production of O3 in the upper troposphere by Wennberg, PO, Hanisco, TF, Jaegle, L, Jacob, DJ, Hintsa, EJ, Lanzendorf, EJ, Anderson, JG, Gao, R, Keim, ER, Donnelly, SG, Negro, LAD, Fahey, DW, McKeen, SA, Salawitch, RJ, Webster, CR, May, RD, Herman, RL, Proffitt, MH, Margitan, JJ, Atlas, EL, Schauffler, SM, Flocke, F, McElroy, CT, Bui, TP

“…The concentrations of the hydrogen radicals OH and HO2 in the middle and upper troposphere were measured simultaneously with those of NO, O3, CO, H2O, CH4,…”
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Stand dynamics of an insular population of an invasive tree, Acer platanoides by Webster, Christopher R., Nelson, Kathryn, Wangen, Steven R.

“…Acer platanoides L. (Norway maple) is an invasive exotic tree species in the eastern and central United States that poses a serious threat to native forests…”
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Comparative growing space efficiency of four tree species in mixed conifer–hardwood forests by Webster, Christopher R., Lorimer, Craig G.

“…The influence of shade tolerance, canopy position, and tree size on growing space efficiency (GSE) in mixed stands of co-occurring conifer and hardwood species…”
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Convective generation of cirrus near the tropopause by Garrett, T. J., Heymsfield, A. J., McGill, M. J., Ridley, B. A., Baumgardner, D. G., Bui, T. P., Webster, C. R.

“…During the July 2002 CRYSTAL‐FACE field program based from Key West, Florida, aircraft measurements showed that long‐lived thin tropopause cirrus (TTC) layers…”
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Three-dimensional model study of the Arctic ozone loss in 2002/2003 and comparison with 1999/2000 and 2003/2004 by Feng, W., Chipperfield, M. P., Davies, S., Sen, B., Toon, G., Blavier, J. F., Webster, C. R., Volk, C. M., Ulanovsky, A., Ravegnani, F., von der Gathen, P., Jost, H., Richard, E. C., Claude, H.

“…We have used the SLIMCAT 3-D off-line chemical transport model (CTM) to quantify the Arctic chemical ozone loss in the year 2002/2003 and compare it with…”
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Comparison of MkIV balloon and ER-2 aircraft measurements of atmospheric trace gases by Toon, G. C., Blavier, J.‐F., Sen, B., Margitan, J. J., Webster, C. R., May, R. D., Fahey, D., Gao, R., Del Negro, L., Proffitt, M., Elkins, J., Romashkin, P. A., Hurst, D. F., Oltmans, S., Atlas, E., Schauffler, S., Flocke, F., Bui, T. P., Stimpfle, R. M., Bonne, G. P., Voss, P. B., Cohen, R. C.

“…On May 8, 1997, vertical profiles of over 30 different gases were measured remotely in solar occultation by the Jet Propulsion Laboratory MkIV Interferometer…”
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Validating AIRS upper atmosphere water vapor retrievals using aircraft and balloon in situ measurements by Hagan, D. E., Webster, C. R., Farmer, C. B., May, R. D., Herman, R. L., Weinstock, E. M., Christensen, L. E., Lait, L. R., Newman, P. A.

“…This paper provides an initial assessment of the accuracy of the Atmospheric Infrared Sounder (AIRS) water vapor retrievals from 500 to 100 mbar. AIRS…”
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Severe and extensive denitrification in the 1999-2000 Arctic winter stratosphere by Popp, P. J., Northway, M. J., Holecek, J. C., Gao, R. S., Fahey, D. W., Elkins, J. W., Hurst, D. F., Romashkin, P. A., Toon, G. C., Sen, B., Schauffler, S. M., Salawitch, R. J., Webster, C. R., Herman, R. L., Jost, H., Bui, T. P., Newman, P. A., Lait, L. R.

“…Observations in the 1999–2000 Arctic winter stratosphere show the most severe and extensive denitrification ever observed in the northern hemisphere…”
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Coarse Woody Debris in Managed Central Hardwood Forests of Indiana, USA by Jenkins, Michael A, Webster, Christopher R, Parker, George R, Spetich, Martin A

“…We evaluated the volume of down deadwood (DDW) and the basal area of standing deadwood (SDW) from a chronosequence of 110 silvicultural openings and 34 mature…”
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Vegetative Legacy of a Protected Deer Herd in Cades Cove, Great Smoky Mountains National Park by Griggs, Jennifer A, Rock, Janet H, Webster, Christopher R, Jenkins, Michael A

“…Overabundant deer populations pose significant challenges to the conservation of native plant communities. We examined the effects of a protected white-tailed…”
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