Search Results - "Turnipseed, A"

The influence of warm-season precipitation on the diel cycle of the surface energy balance and carbon dioxide at a Colorado subalpine forest site by Burns, S. P, Blanken, P. D, Turnipseed, A. A, Hu, J, Monson, R. K

“…Precipitation changes the physical and biological characteristics of an ecosystem. Using a precipitation-based conditional sampling technique and a 14 year…”
Get full text

Observations of gas- and aerosol-phase organic nitrates at BEACHON-RoMBAS 2011 by Fry, J. L, Draper, D. C, Zarzana, K. J, Campuzano-Jost, P, Day, D. A, Jimenez, J. L, Brown, S. S, Cohen, R. C, Kaser, L, Hansel, A, Cappellin, L, Karl, T, Hodzic Roux, A, Turnipseed, A, Cantrell, C, Lefer, B. L, Grossberg, N

“…At the Rocky Mountain Biogenic Aerosol Study (BEACHON-RoMBAS) field campaign in the Colorado front range, July–August 2011, measurements of gas- and…”
Get full text

Impacts of seasonal and regional variability in biogenic VOC emissions on surface ozone in the Pearl River delta region, China by Situ, S, Guenther, A, Wang, X, Jiang, X, Turnipseed, A, Wu, Z, Bai, J

“…This study investigated the impacts of seasonal and regional variability in biogenic volatile organic compounds (BVOCs) on surface ozone over the Pearl River…”
Get full text

Efficient Atmospheric Cleansing of Oxidized Organic Trace Gases by Vegetation by Karl, T, Harley, P, Emmons, L, Thornton, B, Guenther, A, Basu, C, Turnipseed, A, Jardine, K

“…The biosphere is the major source and sink of nonmethane volatile organic compounds (VOCs) in the atmosphere. Gas-phase chemical reactions initiate the removal…”
Get full text

Contribution of leaf and needle litter to whole ecosystem BVOC fluxes by Greenberg, J.P., Asensio, D., Turnipseed, A., Guenther, A.B., Karl, T., Gochis, D.

“…Biogenic volatile organic compound (BVOC) emissions come from a variety of sources, including living above-ground foliar biomass and microbial decomposition of…”
Get full text

Winter forest soil respiration controlled by climate and microbial community composition by Monson, R.K, Lipson, D.L, Burns, S.P, Turnipseed, A.A, Delany, A.C, Williams, M.W, Schmidt, S.K

“…Most terrestrial carbon sequestration at mid-latitudes in the Northern Hemisphere occurs in seasonal, montane forest ecosystems. Winter respiratory carbon…”
Get full text

Rapid formation of isoprene photo-oxidation products observed in Amazonia by Karl, T., Guenther, A., Turnipseed, A., Tyndall, G., Artaxo, P., Martin, S.

“…Isoprene represents the single most important reactive hydrocarbon for atmospheric chemistry in the tropical atmosphere. It plays a central role in global and…”
Get full text

Carbon sequestration in a high-elevation, subalpine forest by Monson, R. K., Turnipseed, A. A., Sparks, J. P., Harley, P. C., Scott-Denton, L. E., Sparks, K., Huxman, T. E.

“…We studied net ecosystem CO2 exchange (NEE) dynamics in a high‐elevation, subalpine forest in Colorado, USA, over a two‐year period. Annual carbon…”
Get full text

Ethene, propene, butene and isoprene emissions from a ponderosa pine forest measured by relaxed eddy accumulation by Rhew, Robert C, Deventer, Malte Julian, Turnipseed, Andrew A, Warneke, Carsten, Ortega, John, Shen, Steve, Martinez, Luis, Koss, Abigail, Lerner, Brian M, Gilman, Jessica B, Smith, James N, Guenther, Alex B, de Gouw, Joost A

“…Alkenes are reactive hydrocarbons that influence local and regional atmospheric chemistry by playing important roles in the photochemical production of…”
Get full text

Undisturbed and disturbed above canopy ponderosa pine emissions: PTR-TOF-MS measurements and MEGAN 2.1 model results by Kaser, L, Karl, T, Guenther, A, Graus, M, Schnitzhofer, R, Turnipseed, A, Fischer, L, Harley, P, Madronich, M, Gochis, D, Keutsch, F. N, Hansel, A

“…We present the first eddy covariance flux measurements of volatile organic compounds (VOCs) using a proton-transfer-reaction time-of-flight mass spectrometer…”
Get full text

Comparison of different real time VOC measurement techniques in a ponderosa pine forest by Kaser, L, Karl, T, Schnitzhofer, R, Graus, M, Herdlinger-Blatt, I. S, DiGangi, J. P, Sive, B, Turnipseed, A, Hornbrook, R. S, Zheng, W, Flocke, F. M, Guenther, A, Keutsch, F. N, Apel, E, Hansel, A

“…Volatile organic compound (VOC) mixing ratios measured by five independent instruments are compared at a forested site dominated by ponderosa pine (Pinus…”
Get full text

Folded tubular photometer for atmospheric measurements of NO2 and NO by Birks, John W, Andersen, Peter C, Williford, Craig J, Turnipseed, Andrew A, Strunk, Stanley E, Ennis, Christine A, Mattson, Erick

“…We describe and characterize a modular folded tubular photometer for making direct measurements of the concentrations of nitrogen dioxide (NO2) and specify how…”
Get full text

Temperature as a Control over Ecosystem CO₂ Fluxes in a High-Elevation, Subalpine Forest by Huxman, T. E., Turnipseed, A. A., J. P. Sparks, P. C. Harley, Monson, R. K.

“…We evaluated the hypothesis that CO₂ uptake by a subalpine, coniferous forest is limited by cool temperature during the growing season. Using the eddy…”
Get full text

Portable calibrator for NO based on the photolysis of N2O and a combined NO2/NO/O3 source for field calibrations of air pollution monitors by Birks, John W, Turnipseed, Andrew A, Andersen, Peter C, Williford, Craig J, Strunk, Stanley, Carpenter, Brian, Ennis, Christine A

“…A highly portable calibration source of nitric oxide (NO) based on the photolysis of nitrous oxide (N2O) supplied by 8 or 16 g disposable cartridges is…”
Get full text

Missing peroxy radical sources within a summertime ponderosa pine forest by Wolfe, G. M, Cantrell, C, Kim, S, Mauldin III, R. L, Karl, T, Harley, P, Turnipseed, A, Zheng, W, Flocke, F, Apel, E. C, Hornbrook, R. S, Hall, S. R, Ullmann, K, Henry, S. B, DiGangi, J. P, Boyle, E. S, Kaser, L, Schnitzhofer, R, Hansel, A, Graus, M, Nakashima, Y, Kajii, Y, Guenther, A, Keutsch, F. N

“…Organic peroxy (RO2) and hydroperoxy (HO2) radicals are key intermediates in the photochemical processes that generate ozone, secondary organic aerosol and…”
Get full text

First direct measurements of formaldehyde flux via eddy covariance: implications for missing in-canopy formaldehyde sources by DiGangi, J. P., Boyle, E. S., Karl, T., Harley, P., Turnipseed, A., Kim, S., Cantrell, C., Maudlin III, R. L., Zheng, W., Flocke, F., Hall, S. R., Ullmann, K., Nakashima, Y., Paul, J. B., Wolfe, G. M., Desai, A. R., Kajii, Y., Guenther, A., Keutsch, F. N.

“…We report the first observations of formaldehyde (HCHO) flux measured via eddy covariance, as well as HCHO concentrations and gradients, as observed by the…”
Get full text

Observations of glyoxal and formaldehyde as metrics for the anthropogenic impact on rural photochemistry by DiGangi, J. P, Henry, S. B, Kammrath, A, Boyle, E. S, Kaser, L, Schnitzhofer, R, Graus, M, Turnipseed, A, Park, J-H, Weber, R. J, Hornbrook, R. S, Cantrell, C. A, Maudlin III, R. L, Kim, S, Nakashima, Y, Wolfe, G. M, Kajii, Y, Apel, E.C, Goldstein, A. H, Guenther, A, Karl, T, Hansel, A, Keutsch, F. N

“…We present simultaneous fast, in-situ measurements of formaldehyde and glyoxal from two rural campaigns, BEARPEX 2009 and BEACHON-ROCS, both located in Pinus…”
Get full text

Chemical sensing of plant stress at the ecosystem scale by Karl, T., Guenther, A., Turnipseed, A., Patton, E. G., Jardine, K.

“…Significant ecosystem-scale emissions of methylsalicylate (MeSA), a semivolatile plant hormone thought to act as the mobile signal for systemic acquired…”
Get full text

Eddy covariance fluxes of peroxyacetyl nitrates (PANs) and NOy to a coniferous forest by Turnipseed, A. A., Huey, L. G., Nemitz, E., Stickel, R., Higgs, J., Tanner, D. J., Slusher, D. L., Sparks, J. P., Flocke, F., Guenther, A.

“…We employed a fast response thermal dissociation‐chemical ionization mass spectrometer (TD‐CIMS) system to measure eddy covariance fluxes of peroxyacetyl…”
Get full text

Evaluation of HOx sources and cycling using measurement-constrained model calculations in a 2-methyl-3-butene-2-ol (MBO) and monoterpene (MT) dominated ecosystem by Kim, S, Wolfe, G M, Mauldin, L, Cantrell, C, Guenther, A, Karl, T, Turnipseed, A, Greenberg, J, Hall, S R, Ullmann, K, Apel, E, Hornbrook, R, Kajii, Y, Nakashima, Y, Keutsch, F N, DiGangi, J P, Henry, S B, Kaser, L, Schnitzhofer, R, Graus, M, Hansel, A, Zheng, W, Flocke, F F

“…We present a detailed analysis of OH observations from the BEACHON (Bio-hydro-atmosphere interactions of Energy, Aerosols, Carbon, H2 O, Organics and…”
Get full text