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J. William Munger 



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 Harvard Forest Webcam

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collaboration with Andrew Richardson

Curriculum Vitae

How to get to my office






Research Activity

The Harvard Forest Environmental Measurement Station began measurements in the fall of 1989. The objectives at this site are to make long-term measurements of net carbon exchange, canopy-atmosphere exchange of selected trace gases, and regional atmospheric chemistry. The Harvard Forest EMS is a component of the Harvard Forest LTER site and the Northeastern Regional Center  of the DOE National Institute for Climatic Change Research (NICCR). My emphasis has been on the regional atmospheric chemistry and nitrogen deposition, and long-term trends in carbon storage.


  • Urbanski, S., C. Barford, S. Wofsy, C. Kucharik, E. Pyle, J. Budney, D. Fitzjarrald, M. Czikowsky, J. W. Munger, (2007) Factors Controlling CO2 Exchange at Harvard Forest  on Hourly to Annual Time Scales, J. Geophys Res., 112, G02020, doi:10.1029/2006JG000293.
  • Lee, B. H., J. W. Munger, A. H. Goldstein and S. C. Wofsy (2006), Anthropogenic emissions of nonmethane hydrocarbons in the northeastern United States: measured seasonal variations from 1992-1996 and 1999-2001, J. Geophys. Res., 111(D20307), doi:10.1029/2005JD006172.
  • Horii, C., J. W. Munger, S. Wofsy, M. Zahniser, D. Nelson and J. B. McManus (2006) Atmospheric reactive nitrogen concentrations and flux budgets at a northeastern U. S. forest site, Agric. and Forest Meteorology, 136 159-174.
  • Horii C. V., J. W. Munger, S. C. Wofsy, M. Zahniser, D. Nelson, J. B. McManus (2004), Fluxes of nitrogen oxides over a temperate deciduous forest, J. Geophys. Res., 109, D08305, doi:10.1029/2003JD004326
  • DeBell , L. J., R. W. Talbot, J. E. Dibb, J. W. Munger, E. V. Fischer, and S. E. Frolking (2004) A major regional air pollution event in the northeastern U.S. caused by extensive forest fires in Quebec, Canada,  J. Geophys. Res. 109, D19305, doi:10.1029/2004JD004840.
  • Barford, C. C., S. C. Wofsy, M. L. Goulden, J. W. Munger, E. H. Pyle, S. P Urbanski, L. Hutyra, S. R. Saleska, D Fitzjarrald. K. Moore (2001) Factors Controlling Long- and Short-Term Sequestration of Atmospheric CO2 in a Mid-latitude Forest Science 294: 1688-1691.
  • Munger, J. W., S. C. Wofsy, P. S. Bakwin, S.-M. Fan, M. L. Goulden, B. C.  Daube, A H. Goldstein, K. E. Moore, and D. R. Fitzjarrald, Atmospheric Deposition of Reactive Nitrogen Oxides and Ozone in a Temperate Deciduous Forest and a Sub-arctic Woodland. 1. Measurements and mechanisms, J. Geophys. Res. 101, 12,639-12,657, 1996. abstract
  • Munger, J. W., S.-M. Fan, P. S. Bakwin, M. L. Goulden, A. H. Goldstein, A. S. Colman, S. C. Wofsy, Regional budgets for nitrogen oxides from continental sources: Variations of rates for oxidztion and deposition with season and distance from source regions, J. Geophys. Res. 103, 8355-8368, 1998. full text (pdf format)
  • Hirsch, A.I., J. W. Munger, D. J. Jacob, L.W. Horowitz and A. H. Goldstein, Seasonal variation of the ozone production efficiency per unit NOx at Harvard Forest, Massachusetts, J. Geophys. Res., 101, 12659-12666, 1996.

Harvard Forest New Directions

Collaborative Research: Determination of HONO and NO2 flux and concentration over forest canopies using quantum cascade laser absorption spectroscopy

J. William Munger and Mark Zahniser

An NSF-funded project started in 2008 to construct a 2-channel Quantum-Cascade Laser Absorption Spectrometer capable of high frequency measurement of HONO and NO2 to measure exchange of HONO and NO2  over the forest canopy.

LBA - Brazil

Our lab participated in the LBA project to measure CO2 Fluxes/Concentrations and CO concentrations and ancillary meteorological parameters at a tower site in primary forest near the Tapjos River, and at a coastal site near Natal.
see our LBA project web site.

My focus has been on the CO and CO2 concentration gradient across the region.

  • Saleska, S. R., S. D. Miller, D. M. Matross, M. L. Goulden, S. C. Wofsy, H. R. da Rocha, P. B. de Camargo, P. Crill, B. C. Daube, H. C. de Freitas, L. Hutyra, M. Keller, V. Kirchhoff, M. Menton, J. W. Munger, E. H. Pyle, A. H. Rice, H. Silva (2003) Carbon in Amazon forests: unexpected seasonal fluxes and disturbance-induced losses, Science, 302, 1554.
  • Hutyra, L. R.,  J. W. Munger, E. Hammond-Pyle, S. R. Salesk, N. Restrepo-Coupe, B. C. Daube, P. B. de Camargo, S. C. Wofsy (2008), Resolving systematic errors in estimates of net ecosystem exchange of CO2 and ecosystem respiration in a tropical forest biome, Agricultural and Forest Meteorology, 148, 1266-1279
  • Hutyra, L. R., J. W. Munger, S. R. Saleska, E. Gottlieb, B. C. Daube, A. L. Dunn, D. F. Amaral, P. B. de Camargo, and S. C. Wofsy (2007), Seasonal controls on the exchange of carbon and water in an Amazonian rain forest, J. Geophys. Res., 112, G03008, doi:10.1029/2006JG000365.



China Project

As part of the Harvard University China Project in collaboration with Hao Jiming and Yuxuan Wang at Tsinghua University a measurement station was set up near Miyun, north of Beijing. Measurements of CO, CO2, O3, SO2, and NO/NOy are being made there to test and evaluate regional atmospheric models.

See recent publication in Atmospheric Chemistry and Physics

Wang, Y., M. B. McElroy, J. W. Munger, Jiming Hao, Hong Ma, C. P. Nielsen, Yaosheng Chen,  Variations of O3 and CO in summertime at a rural site near Beijing , Atmos Chem. Phys.  8, 6355-6363, 2008

Examples of data analysis and interpretation

(Excerpts from a poster session at the Fall 1997 AGU meeting)
email jwm with questions or comments

installation of Tower at Harvard Forest
click here for site details and prior results
Publications of Harvard Forest Results

Past work

Greenland Ice Sheet Project

Munger, J. W., D. J. Jacob, S.-M. Fan, A. S Colman, and J. E. Dibb, Concentrations and Snow-Atmosphere Fluxes of Reactive Nitrogen at Summit, Greenland, J. Geophys. Res., 104, 13,721-13,734, 1999. (pdf version)

NOy concentrations and fluxes to snow
view of summit

go to Greenland

  • Cloudwater chemistry in Shenandoah Mountains


  • Cloudwater chemistry in California

The Chemical Composition of Fogs and Clouds in Southern California, Ph.D. Thesis, California Institute of Technology, Pasadena, CA, 1989

acid fog

  • Precipitation Chemistry

Environmental controls and ecological consequences of regional precipitation chemistry in Minnesota, M.S Thesis, University of Minnesota, Minneapolis, 1981.

acid rain

last updated Feb. 3, 2009