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Nathan G. McDowell


Climate Research Lab Personnel




Contact Information

  • (505) 665-2909 - Phone
  • (505) 665-3285 - FAX
  • Earth and Environmental Sciences
  • Atmospheric and Environmental Dynamics Group
  • MS-J495
  • mcdowell@lanl.gov
  • Los Alamos National Laboratory, Los Alamos, NM 87545


Resume, Posters, Presentations, Publications, Etc.




Publications


See also the Climate Research Publications page.


Presentations - Invited


2008

Kolb, T.E., and N.G. McDowell. Tree ecophysiology research at Taylor Woods. A Celebration of Fort Valley Experimental Forest's Century of Research, 1908-2008. USDA Forest Service, August 2008.


2007

McDowell, N.G. Advantages and knowledge gained from comparison of ecosystem models to laser based measurements of the stable isotope composition of biosphere-atmosphere CO2 exchange: BASIN (Biosphere Atmosphere Stable Isotope Network) Annual meeting, December 2007, San Francisco CA.

McDowell, N.G. Laser measurements of stable carbon and oxygen isotope ratios of CO2 exchanged at the leaf and soil surfaces. BASIN (Biosphere Atmosphere Stable Isotope Network) Annual meeting, December 2007, San Francisco CA.

White, S. and N.G. McDowell. Climatic and physiological regulation of transpiration across a steep precipitation gradient in northern New Mexico. SAHRA (Sustainability of semi-Arid Hydrology and Riparian Areas, NSF) workshop, Valle Caldera National Preserve, August 2007.

McDowell, N.G., W. Pockman, J. Plaut, E. Yepez, S. White, C. Meyer. Why do some trees die while others survive? Theories underlying tree mortality during climatic stress. Ecological Society of America Annual Meeting, San Jose, CA, August 2007.

McDowell, N.G. and W. Pockman. Mechanisms of survival and mortality during drought in plants. In: Climate induced forest die-back as an emergent phenomenon: patterns, mechanisms and projections. Ecological Society of America Annual Meeting, San Jose, CA, August 2007.

McDowell, N.G. Stable isotopes as indicators of canopy processes. Wind River Canopy Crane Workshop. June 2007.

McDowell, N.G. Climate-ecosystem interactions. In: The IGPP Climate Study Group. May 2007.


2006

Powers, H.H. and N.G. McDowell. 2006. CO2 Lasers. Biosphere-Atmosphere Stable Isotope Network, Annual pre-American Geophysical Union meeting.

McDowell, N.G., and W. Pockman. Mechanisms of mortality and survival during drought. In: Drought Impacts on Regional Ecosystems Network (DIREnet, National Science Foundation) annual meeting, Flagstaff Arizona, July 2006.

McDowell, N.G. Using stable isotopes to understand biosphere-atmosphere carbon and water exchange. In: EES Frontiers in Geoscience Colloquium. April 2006.


2005

McDowell, N.G. Ecosystem and leaf level applications of δ13 and δ18O-CO2 measurements via dioxide tunable diode laser spectroscopy. In: Stable isotope applications to agricultural and plant research. Special session of the Agronomy Society of America's annual meeting, Salt Lake City, Utah, November 2005.

McDowell, N.G. Ecohydrological applications of tunable diode laser absorption spectroscopy measurements of atmospheric CO2. In: Measurement and monitoring methods in ecohydrology. Special session of the American Geophysical Union's Spring Session, New Orleans, Louisiana, May 2005.

McDowell, N.G. Applications of stable isotope measurements to studying the terrestrial carbon and water cycles. Earth and Environmental Sciences Division Review, April 2005.

McDowell, N.G, H. Adams, J. Bailey, T.E. Kolb, D.A. Falk. Using stable isotopes of tree rings to assess physiological response to disturbance. In: Stable isotope analysis of trees: new methods, new uses. Special session of the American Association of Geography, Denver, Colorado, April 2005.

Bond, B.J., M.G. Ryan, N. Phillips, N.G. McDowell, F.C. Meinzer. 2005. Fresh perspectives on hydraulic and hydrostatic limitations to tree height and tree growth 4th International Canopy Conference, Liepzig Germany.


2004

McDowell, N. 2004. Carbon flux analysis in terrestrial ecosystems. US-Norway Summer School on Carbon Capture and Storage in Geologic Formations, St. Johns College, Santa Fe NM.

McDowell, N. and D. Breshears. 2004. A new tool to understand vegetation response to drought: Tunable Diode Laser Absorption Spectroscopy. "Identifying technologies to improve regional water stewardship", a conference hosted by the University of New Mexico Office for Policy, Security and Technology.

Bond, B.J., N. Czarnomski, K. Davis, N. Defrosses, K. George, N. Gehring, J. Licata, C. Lunch, N. McDowell, T. Ocheltree, N. Phillips, T. Pypker, S. Reed, A. Schauer, M. Ryan, M. Williams. 2004. Growth and photosynthesis at Wind River. Invited presentation at the Wind River Canopy Crane Research Facility Annual Meeting, Carson Washington.


2003

McDowell, N. 2003. Stable carbon isotope composition from the leaf to the globe: current understanding and future prospects. University of New Mexico, Biology Department.

McDowell, N. 2003. Using tree-ring analysis to decipher water-use efficiency and growth rates of old Pinus ponderosa trees to disturbance. University of Arizona, Laboratory for Tree-Ring Research.

McDowell, N. 2003. Carbon isotope discrimination and growth response of old trees to stand density reductions. Northern Arizona University, Forest Science Department.


2002

McDowell, N. 2002. Hydraulic constraints on tree growth. Oregon State University, Department of Forest Science.

Bowling D, Lai C-T, McDowell N. 2002. Short-term environmental effects on δ13C of ecosystem respiration, Stable Isotopes and Biosphere-Atmosphere Interactions International Workshop, Banff, Alberta.


2001

Bond, B.J., M.G. Ryan, N. Phillips, N.G. McDowell. 2001. The Hydraulic Limitation Hypothesis: past, present and future. Terrestrial Carbon Sequestration Conference, Helsinki, Finland.


2000

Bond, B.J., M.G. Ryan, N. Phillips, N.G. McDowell and R.M. Hubbard. 2000. Hydraulic constraints on productivity of old growth trees. Symposium #9: The Water Limitation: Issues in Plant, Community and Ecosystem Water Use. Ecological Society of America 85th Annual Meeting, Snowbird, Utah.


Presentations - Noninvited


2007

S.Andra White, William T. Pockman, Nate McDowell, Mike Ryan, Enrico Yepez. Soil respiration responses to precipitation pulse-dynamics in a piñon-juniper ecosystem. Annual Meeting of the Ecological Society of America. San Jose, CA. Aug, 2007

Jennifer Plaut, Enrico Yepez, William T. Pockman, Nathan G. McDowell. Precipitation pulse responses in piñon-juniper woodland in central New Mexico. Annual Meeting of the Ecological Society of America. San Jose, CA. Aug, 2007

Enrico A. Yepez, Jim Elliot, S. Andra White, Jennifer Plaut, Nathan McDowell, William T. Pockman. Causes and consequences of tree mortality in piñon-juniper woodlands. Introducing an ecosystem scale rainfall manipulation. Annual Meeting of the Ecological Society of America. San Jose, CA. Aug, 2007

Enrico A. Yepez, Jim Elliot, S. Andra White, Jennifer Plaut, Nathan McDowell, William T. Pockman. Hydraulic mechanisms related to tree mortality and survival during drought in Piñon (Pinus edulis) and Juniper (Juniperus monosperma) woodlands. AGU Spring meeting. Aculpulco Mexico.

S. Andra White, William T Pockman, NG McDowell, M. Ryan and E Yepez. 2007. Soil respiration in a piñon juniper ecosystem. UNM Biology Research Day, April 2007.

Julie C. Glaser, Nicole A. Davision, Jennifer E. Johnson, Enrico A. Yepez and William T. Pockman. Water sources and carbon isotope discrimination in pinon-juniper woodlands at the Sevilleta LTER. UNM Biology Research Day, April 2007.


2006

Hanson, D., M.M. Barbour, N.G. McDowell. 2006. Rapid shifts in 13CO2 content of leaf respiration: Potential 13O2 signature of light-enhanced dark respiration. American Society of Plant Biology Annual Meeting, Washington DC.

Kolb, T.E., D.F. Koepke, N.G. McDowell. 2006. A tree-centered mechanistic basis for drought-induced bark beetle outbreaks in Arizona. North American Forest Insect Work Conference. Asheville, North Carolina.

Powers, H. H. and N.G. McDowell. 2006. New design and methodology for measuring stable isotopes of soil respired carbon dioxide. Los Alamos National Laboratory.


2005

Powers, H.H., C.P. Bickford, C.W. Meyer, D.T. Hanson, S. Kern, and N.G. McDowell. 2005. Tunable Diode Laser Spectroscopy: Testing and development for real-time isotopic measurements from leaf to ecosystem scale carbon dioxide exchange. American Geophysical Union Fall Meeting, San Francisco, California

Barbour, M.M, D.T. Hanson, C.P. Bickford, N.G. McDowell. 2005. Temporal variability in carbon isotope composition of leaf-respired carbon dioxide. American Geophysical Union Fall Meeting, San Francisco, California.

McDowell, N.G., C.P. Bickford, D.T. Hanson, S.E. Kern, C. Meyer, W. Pockman, H. Powers. 2005. Tunable Diode Laser Measurements of Leaf-scale Carbon Isotope Discrimination and Ecosystem Respired Carbon and Oxygen Isotope Ratios in a Semi-arid Woodland. American Geophysical Union Fall Meeting, San Francisco, California.

Levanič, T, and N.G. McDowell. 2005. Stable isotopes in oak (Quercus robur L.) rings as an indicator of oak mortality. EURODENDRO 2005, Viterbo, Italy.

Hanson, D.T., and N.G. McDowell. 2005. Assessing carbon concentrating mechanism function with a tunable diode laser spectrometer: real-time analysis of 13O2 discrimination. American Society of Plant Biologists Annual Meeting, Seattle, Washington.


2004

McDowell, N.G., J. Licata, B.J. Bond, and M. Falk. 2004. Revisiting hydraulic limitation at Wind River, Washington. Ecological Society of America 89th Annual Meeting, Portland, Oregon.


2003

McDowell, N.G., D.R. Bowling, A. Schauer, B.J. Bond, J. Irvine, B.E. Law, J.R. Ehleringer. 2003. Seasonal variation in δ13CR in two coniferous forests. American Geophysical Union Fall Meeting, San Francisco, California.


2001

McDowell, N.G., D. Bowling, B.J. Bond, and J.R. Ehleringer. 2001. Oxygen-18 content of ecosystem respiration across a climatic gradient in Oregon. American Geophysical Union Fall Meeting, San Francisco, California.

Bowling D., N.G. McDowell, B.E. Law, B.J. Bond, J.R. Ehleringer. 2001. Isotopic (13C) response of ponderosa pine ecosystem respiration to atmospheric stress events. American Geophysical Union Fall Meeting, San Francisco, California.

McDowell, N.G., D. Bowling, B.J. Bond, and J.R. Ehleringer. Seasonal variation of δ18O of ecosystem respiration across a precipitation gradient in Oregon USA. 2001. International Union of Forest Research Organizations, Canopy Process Sub Division, Portland, Oregon.


2000 and Before

Ishii, H., E.D. Ford, N.G. McDowell. 2000. The role of epicormic branches in crown development of old-growth Douglas-fir trees. Japanese Ecological Society Annual Meeting, Tokyo, Japan.

Bowling, D. N.G. McDowell, B.J. Bond, P. Anthoni, J. Irvine, B. Law, and J.R. Ehleringer. 2000. Seasonal and interannual variation in the carbon isotopic composition of ecosystem respiration along an Oregon precipitation gradient. American Geophysical Union Fall Meeting, San Francisco, California.

McDowell, N.G., N. Phillips, A. Schauer, B.J. Bond, and M.G. Ryan. 2000. Hydraulic limitation and compensation in large, old Douglas-fir. Ecological Society of America 85th Annual Meeting, Snowbird Utah.

Phillips N, B.J. Bond, M.G. Ryan, N.G. McDowell, A. Schauer. 2000. Hydraulic resistance and capacitance as a function of tree size. Ecological Society of America 85th Annual Meeting, Snowbird Utah.

Phillips N, B.J. Bond, N.G. McDowell, A. Schauer, M.G. Ryan. 2000. Can storage in tall trees overcome hydraulic limitations to forest transpiration? American Geophysical Union, Spring Meeting, Washington, DC.

McDowell, N.G., B.J. Bond, R. Hubbard, R. Ishii, N. Phillips, M.G. Ryan, D. Whitehead. 1999. The relationship between tree height and leaf area:sapwood area. Ecological Society of America 84th Annual Meeting, Spokane Washington.

Phillips, N, B.J. Bond, M.G. Ryan, N.G. McDowell, K.T. Paw U, J. Chen 1999. Scaling water use of 20, 40 and 500 year old Douglas-fir trees to the forest level and comparison with eddy covariance estimates. American Geophysical Union, Fall Meeting, San Francisco, CA.

Phillips N, B.J. Bond, M.G.Ryan, N.G. McDowell, E. Watrud 1999. Do hydraulic constraints in tall trees affect crown gas exchange? Ecological Society of America, Annual Meeting, Spokane, WA.


 

Posters



2007

Engel, S., H.M. Lease, N.G. McDowell, and B.O. Wolf. 2007. Breath carbon isotope ratios from a fall grasshopper community as measured in real time with tunable diode laser absorption spectroscopy. The Society for Integrative and Comparative Biology Annual Conference, Phoenix USA.


2006

Powers, H., J. Hunt, N.G. McDowell. 2006. Measuring soil CO2 fluxes and stable isotopes with a chamber system and tunable diode laser. American Geophysical Union's Fall Meeting, San Francisco USA.


2005

Powers, H., C. Bickford, D. Hanson, S. Kern, C. Meyer, N. McDowell. 2005. Tunable Diode Laser Absorption Spectroscopy: testing and development for real-time stable isotope measurements of leaf to ecosystem-scale carbon dioxide exchange. American Geophysical Union's Fall Meeting, San Francisco USA.

White, S., K. Brown, H. Powers, C. Meyer, N. McDowell. 2005. Canopy transpiration across a steep climatic gradient in the Jemez Mts. of northern New Mexico. American Geophysical Union's Fall Meeting, San Francisco USA.


2002

Meyer C.W., D.D. Breshears, K.L. Goddard, K.E. Dayem, S.N. Martens, N.G. McDowell. Drought recovery via foliar absorption of intercepted rainfall bypasses soil water uptake. Ecological Society of America 89th Annual Meeting, Portland, Oregon.

McDowell, N.G., D. Bowling, J. Welker, J. Irvine, B. E. Law, B.J. Bond, and J.R. Ehleringer. Relationships between precipitation, season, and the δ18O of ecosystem respiration across a steep climatic gradient. Biosphere-Atmosphere Stable Isotope Network, May meeting, Banff Canada, 2002.

McDowell, N.G., D. Bowling. Estimating the δ18O and δ13C of ecosystem respiration: calculation via intercepts vs. slopes. Biosphere-Atmosphere Stable Isotope Network, May meeting, Banff Canada, 2002.


2001

Bowling, D., N. G. McDowell, B.J. Bond, B.E. Law, and J.R. Ehleringer. 2001. 13C content of ecosystem respiration is linked to precipitation and vapor pressure deficit. "History of Atmospheric CO2 and the Impact on Plants, Animals, and Ecosystems" Snowbird, Utah.

Bowling, D., N. G. McDowell, B.J. Bond, B.E. Law, and J.R. Ehleringer. 2001. Ecosystem respiration 13C across a steep climatic gradient in Oregon, USA. International Union of Forest Research Organizations, Canopy Process Sub Division, Portland, Oregon.


2000 and Before

Watrude, E., B.J. Bond, N. Phillips, N. McDowell, and M.G. Ryan. Differences in soil water drawdown during the summer of 1998 in three different age classes of Douglas-fir in the Wind River Basin, Washington. 1999 Ecological Society of America Annual Meeting.

McDowell, N. G., Nick J. Balster, John D. Marshall, and Brian Austin. "Winter carbon dioxide uptake and release from an interior Pacific Northwest forest." 1997 Ecological Society of America Annual Meeting. First place, "Best Student Poster Award". Physiological Ecology Section.


 
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