OpenURL Connection Search

Select item for more details and to access through your institution.

Measurements of pernitric acid at the South Pole during ISCAT 2000.
Published in:
Geophysical Research Letters, 2002, v. 29, n. 21, p. 7-1, doi. 10.1029/2002GL015703
By:
- Slusher, D. L.;
- Huey, L. G.;
- Tanner, D. J.;
- Chen, G.;
- Davis, D. D.;
- Buhr, M.;
- Nowak, J. B.;
- Eisele, F. L.;
- Kosciuch, E.;
- Mauldin, R. L.;
- Lefer, B. L.;
- Shetter, R. E.;
- Dibb, J. E.
Publication type:
Article
Unexpected high levels of NO observed at South Pole.
Published in:
Geophysical Research Letters, 2001, v. 28, n. 19, p. 3625, doi. 10.1029/2000GL012584
By:
- Davis, D.;
- Nowak, J. B.;
- Chen, G.;
- Buhr, M.;
- Arimoto, R.;
- Hogan, A.;
- Eisele, F.;
- Mauldin, L.;
- Tanner, D.;
- Shetter, R.;
- Lefer, B.;
- McMurry, P.
Publication type:
Article
Measurements of OH, H2SO4, and MSA at the South Pole during ISCAT.
Published in:
Geophysical Research Letters, 2001, v. 28, n. 19, p. 3629, doi. 10.1029/2000GL012711
By:
- Mauldin, R. L.;
- Eisele, F. L.;
- Tanner, D. J.;
- Kosciuch, E.;
- Shetter, R.;
- Lefer, B.;
- Hall, S. R.;
- Nowak, J. B.;
- Buhr, M.;
- Chen, G.;
- Wang, P.;
- Davis, D.
Publication type:
Article
An investigation of South Pole HOx chemistry: Comparison of model results with ISCAT observations.
Published in:
Geophysical Research Letters, 2001, v. 28, n. 19, p. 3633, doi. 10.1029/2001GL013158
By:
- Chen, G.;
- Davis, D.;
- Crawford, J.;
- Nowak, J. B.;
- Eisele, F.;
- Mauldin, R. L.;
- Tanner, D.;
- Buhr, M.;
- Shetter, R.;
- Lefer, B.;
- Arimoto, R.;
- Hogan, A.;
- Blake, D.
Publication type:
Article
Evidence for photochemical production of ozone at the South Pole surface.
Published in:
Geophysical Research Letters, 2001, v. 28, n. 19, p. 3641, doi. 10.1029/2001GL013055
By:
- Crawford, J. H.;
- Davis, D. D.;
- Chen, G.;
- Buhr, M.;
- Oltmans, S.;
- Weller, R.;
- Mauldin, L.;
- Eisele, F.;
- Shetter, R.;
- Lefer, B.;
- Arimoto, R.;
- Hogan, A.
Publication type:
Article
Regional ozone from biogenic hydrocarbons deduced from airborne measurements of PAN, PPN, and MPAN.
Published in:
Geophysical Research Letters, 1997, v. 24, n. 9, p. 1099, doi. 10.1029/97GL00548
By:
- Williams, J.;
- Roberts, J. M.;
- Fehsenfeld, F. C.;
- Bertman, S. B.;
- Buhr, M. P.;
- Goldan, P. D.;
- Hübler, G.;
- Kuster, W. C.;
- Ryerson, T. B.;
- Trainer, M.;
- Young, V.
Publication type:
Article
Effects of cold shock and phospholipase A2 on intact boar spermatozoa and sperm head plasma membranes.
Published in:
Molecular Reproduction & Development, 1990, v. 26, n. 2, p. 143, doi. 10.1002/mrd.1080260208
By:
- Robertson, L.;
- Bailey, J. L.;
- Buhr, M. M.
Publication type:
Article
Atmospheric chemistry results from the ANTCI 2005 Antarctic plateau airborne study.
Published in:
Journal of Geophysical Research. Atmospheres, 2010, v. 115, n. D7, p. n/a, doi. 10.1029/2009JD012605
By:
- Slusher, D. L.;
- Neff, W. D.;
- Kim, S.;
- Huey, L. G.;
- Wang, Y.;
- Zeng, T.;
- Tanner, D. J.;
- Blake, D. R.;
- Beyersdorf, A.;
- Lefer, B. L.;
- Crawford, J. H.;
- Eisele, F. L.;
- Mauldin, R. L.;
- Kosciuch, E.;
- Buhr, M. P.;
- Wallace, H. W.;
- Davis, D. D.
Publication type:
Article
Models and observations of the impact of natural hydrocarbons on rural ozone.
Published in:
Nature, 1987, v. 329, n. 6141, p. 705, doi. 10.1038/329705a0
By:
- Trainer, M.;
- Williams, E. J.;
- Parrish, D. D.;
- Buhr, M. P.;
- Allwine, E. J.;
- Westberg, H. H.;
- Fehsenfeld, F. C.;
- Liu, S. C.
Publication type:
Article
Peer-Review of Digital Educational Resources--A Rigorous Review Process Developed by the Climate Literacy and Energy Awareness Network (CLEAN).
Published in:
Journal of Geoscience Education, 2012, v. 60, n. 4, p. 295, doi. 10.5408/12-324.1
By:
- Gold, Anne U.;
- Ledley, Tamara Shapiro;
- Buhr, Susan M.;
- Fox, Sean;
- McCaffrey, Mark;
- Niepold, Frank;
- Manduca, Cathy;
- Lynds, Susan E.
Publication type:
Article
Lipid Bilayer Composition Affects Transmembrane Protein Orientation and Function.
Published in:
Journal of Lipids, 2011, p. 1, doi. 10.1155/2011/208457
By:
- Hickey, Katie D.;
- Buhr, Mary M.
Publication type:
Article
Ozone production from Canadian wildfires during June and July of 1995.
Published in:
Journal of Geophysical Research. Atmospheres, 2002, v. 107, n. D14, p. ACH 7-1, doi. 10.1029/2001JD000697
By:
- McKeen, S. A.;
- Wotawa, G.;
- Parrish, D. D.;
- Holloway, J. S.;
- Buhr, M. P.;
- Hübler, G.;
- Fehsenfeld, F. C.;
- Meagher, J. F.
Publication type:
Article
A method for the airborne measurement of PAN, PPN, and MPAN.
Published in:
Journal of Geophysical Research. Atmospheres, 2000, v. 105, n. D23, p. 28943, doi. 10.1029/2000JD900373
By:
- Williams, J.;
- Roberts, J. M.;
- Bertman, S. B.;
- Stroud, C. A.;
- Fehsenfeld, F. C.;
- Baumann, K.;
- Buhr, M. P.;
- Knapp, K.;
- Murphy, P. C.;
- Nowick, M.;
- Williams, E. J.
Publication type:
Article
Hydrogen peroxide dry deposition lifetime determined from observed loss rates in a power plant plume.
Published in:
Journal of Geophysical Research. Atmospheres, 1998, v. 103, n. D17, p. 22617, doi. 10.1029/98JD01619
By:
- Jobson, B. T.;
- Frost, G. J.;
- McKeen, S. A.;
- Ryerson, T. B.;
- Buhr, M. P.;
- Parrish, D. D.;
- Trainer, M.;
- Fehsenfeld, F. C.
Publication type:
Article
Photochemical ozone production in the rural southeastern United States during the 1990 Rural Oxidants in the Southern Environment (ROSE) program.
Published in:
Journal of Geophysical Research. Atmospheres, 1998, v. 103, n. D17, p. 22491, doi. 10.1029/98JD00881
By:
- Frost, G. J.;
- Trainer, M.;
- Allwine, G.;
- Buhr, M. P.;
- Calvert, J. G.;
- Cantrell, C. A.;
- Fehsenfeld, F. C.;
- Goldan, P. D.;
- Herwehe, J.;
- Hübler, G.;
- Kuster, W. C.;
- Martin, R.;
- McMillen, R. T.;
- Montzka, S. A.;
- Norton, R. B.;
- Parrish, D. D.;
- Ridley, B. A.;
- Shetter, R. E.;
- Walega, J. G.;
- Watkins, B. A.
Publication type:
Article
Emissions lifetimes and ozone formation in power plant plumes.
Published in:
Journal of Geophysical Research. Atmospheres, 1998, v. 103, n. D17, p. 22569, doi. 10.1029/98JD01620
By:
- Ryerson, T. B.;
- Buhr, M. P.;
- Frost, G. J.;
- Goldan, P. D.;
- Holloway, J. S.;
- Hübler, G.;
- Jobson, B. T.;
- Kuster, W. C.;
- McKeen, S. A.;
- Parrish, D. D.;
- Roberts, J. M.;
- Sueper, D. T.;
- Trainer, M.;
- Williams, J.;
- Fehsenfeld, F. C.
Publication type:
Article
Are isoforms of capacitating Na+K+‐ATPase localized to sperm head rafts?
Published in:
Molecular Reproduction & Development, 2021, v. 88, n. 11, p. 731, doi. 10.1002/mrd.23543
By:
- Sajeevadathan, Mrudhula;
- Pettitt, Murray J.;
- Buhr, Mary M.
Publication type:
Article
Navigating Climate Science in the Classroom: Teacher Preparation, Perceptions and Practices.
Published in:
Journal of Geoscience Education, 2014, v. 62, n. 4, p. 550, doi. 10.5408/12-304.1
By:
- Sullivan, Susan M. Buhr;
- Ledley, Tamara Shapiro;
- Lynds, Susan E.;
- Gold, Anne U.
Publication type:
Article
Continuation of the Theme: Outcomes of Climate Literacy Efforts (Part 2).
Published in:
Journal of Geoscience Education, 2014, v. 62, n. 4, p. 535, doi. 10.5408/1089-9995-62.4.535.1
By:
- Sullivan, Susan M. Buhr;
- John, Kristen St.
Publication type:
Article
Effect of Insemination–Ovulation Interval and Addition of Seminal Plasma on Sow Fertility to Insemination of Cryopreserved Sperm.
Published in:
Reproduction in Domestic Animals, 2007, v. 42, n. 4, p. 418, doi. 10.1111/j.1439-0531.2006.00801.x
By:
- Abad, M.;
- Garcia, J. C.;
- Sprecher, D. J.;
- Cassar, G.;
- Friendship, R. M.;
- Buhr, M. M.;
- Kirkwood, R. N.
Publication type:
Article
Existence and importance of Na+K+-ATPase in the plasma membrane of boar spermatozoa.
Published in:
Canadian Journal of Physiology & Pharmacology, 2024, v. 102, n. 4, p. 254, doi. 10.1139/cjpp-2023-0116
By:
- Awda, Basim J.;
- Mahoney, Ian V.;
- Pettitt, Murray;
- Imran, Muhammad;
- Katselis, George S.;
- Buhr, Mary M.
Publication type:
Article
Strong wintertime ozone events in the Upper Green River Basin, Wyoming.
Published in:
Atmospheric Chemistry & Physics Discussions, 2013, v. 13, n. 7, p. 17953, doi. 10.5194/acpd-13-17953-2013
By:
- Rappenglück, B.;
- Ackermann, L.;
- Alvarez, S.;
- Golovko, J.;
- Buhr, M.;
- Field, R.;
- Soltis, J.;
- Montague, D. C.;
- Hauze, B.;
- Adamson, S.;
- Risch, D.;
- Wilkerson, G.;
- Bush, D.;
- Stoeckenius, T.;
- Keslar, C.
Publication type:
Article
Effect of lipoproteins and luteinizing hormone on progesterone production by large and small luteal cells throughout the porcine estrous cycle
Published in:
Journal of Animal Science, 1987, v. 65, n. 4, p. 1027, doi. 10.2527/jas1987.6541027x
By:
- Buhr, M. M.
Publication type:
Article
Assessment of pollutant emission inventories by principal component analysis of ambient air measurements.
Published in:
Geophysical Research Letters, 1992, v. 19, n. 10, p. 1009, doi. 10.1029/92GL01020
By:
- Buhr, M. P.;
- Trainer, M.;
- Parrish, D. D.;
- Sievers, R. E.;
- Fehsenfeld, F. C.
Publication type:
Article
Meteorological mechanisms for transporting O3 over the western North Atlantic Ocean: A case study for August 24-29, 1993.
Published in:
Journal of Geophysical Research. Atmospheres, 1996, v. 101, n. D22, p. 29213, doi. 10.1029/96JD00885
By:
- Moody, J. L.;
- Davenport, J. C.;
- Merrill, J. T.;
- Oltmans, S. J.;
- Parrish, D. D.;
- Holloway, J. S.;
- Levy, H.;
- Forbes, G. L.;
- Trainer, M.;
- Buhr, M.
Publication type:
Article
Trace gas measurements and air mass classification from a ground station in Taiwan during the PEM-West A experiment (1991).
Published in:
Journal of Geophysical Research. Atmospheres, 1996, v. 101, n. D1, p. 2025, doi. 10.1029/95JD00411
By:
- Buhr, M. P.;
- Hsu, K.-J.;
- Liu, C. M.;
- Liu, R.;
- Wei, L.;
- Liu, Y.-C.;
- Kuo, Y.-S.
Publication type:
Article
Relationships between PAN and ozone at sites in eastern North America.
Published in:
Journal of Geophysical Research. Atmospheres, 1995, v. 100, n. D11, p. 22821, doi. 10.1029/95JD01221
By:
- Roberts, J. M.;
- Tanner, R. L.;
- Newman, L.;
- Bowersox, V. C.;
- Bottenheim, J. W.;
- Anlauf, K. G.;
- Brice, K. A.;
- Parrish, D. D.;
- Fehsenfeld, F. C.;
- Buhr, M. P.;
- Meagher, J. F.;
- Bailey, E. M.
Publication type:
Article
Regional ozone and urban plumes in the southeastern United States: Birmingham, A case study.
Published in:
Journal of Geophysical Research. Atmospheres, 1995, v. 100, n. D9, p. 18823, doi. 10.1029/95JD01641
By:
- Trainer, M.;
- Ridley, B. A.;
- Buhr, M. P.;
- Kok, G.;
- Walega, J.;
- Hübler, G.;
- Parrish, D. D.;
- Fehsenfeld, F. C.
Publication type:
Article
Correlation of ozone with NOy in photochemically aged air.
Published in:
Journal of Geophysical Research. Atmospheres, 1993, v. 98, n. D2, p. 2917, doi. 10.1029/92JD01910
By:
- Trainer, M.;
- Parrish, D. D.;
- Buhr, M. P.;
- Norton, R. B.;
- Fehsenfeld, F. C.;
- Anlauf, K. G.;
- Bottenheim, J. W.;
- Tang, Y. Z.;
- Wiebe, H. A.;
- Roberts, J. M.;
- Tanner, R. L.;
- Newman, L.;
- Bowersox, V. C.;
- Meagher, J. F.;
- Olszyna, K. J.;
- Rodgers, M. O.;
- Wang, T.;
- Berresheim, H.;
- Demerjian, K. L.;
- Roychowdhury, U. K.
Publication type:
Article
The total reactive oxidized nitrogen levels and the partitioning between the individual species at six rural sites in eastern North America.
Published in:
Journal of Geophysical Research. Atmospheres, 1993, v. 98, n. D2, p. 2927, doi. 10.1029/92JD02384
By:
- Parrish, D. D.;
- Buhr, M. P.;
- Trainer, M.;
- Norton, R. B.;
- Shimshock, J. P.;
- Fehsenfeld, F. C.;
- Anlauf, K. G.;
- Bottenheim, J. W.;
- Tang, Y. Z.;
- Wiebe, H. A.;
- Roberts, J. M.;
- Tanner, R. L.;
- Newman, L.;
- Bowersox, V. C.;
- Olszyna, K. J.;
- Bailey, E. M.;
- Rodgers, M. O.;
- Wang, T.;
- Berresheim, H.;
- Roychowdhury, U. K.
Publication type:
Article
Peroxy radicals in the ROSE experiment: Measurement and theory.
Published in:
Journal of Geophysical Research. Atmospheres, 1992, v. 97, n. D18, p. 20671, doi. 10.1029/92JD01727
By:
- Cantrell, C. A.;
- Lind, J. A.;
- Shetter, R. E.;
- Calvert, J. G.;
- Goldan, P. D.;
- Kuster, W.;
- Fehsenfeld, F. C.;
- Montzka, S. A.;
- Parrish, D. D.;
- Williams, E. J.;
- Buhr, M. P.;
- Westberg, H. H.;
- Allwine, G.;
- Martin, R.
Publication type:
Article
An intercomparison of five ammonia measurement techniques.
Published in:
Journal of Geophysical Research. Atmospheres, 1992, v. 97, n. D11, p. 11591, doi. 10.1029/92JD00721
By:
- Williams, E. J.;
- Sandholm, S. T.;
- Bradshaw, J. D.;
- Schendel, J. S.;
- Langford, A. O.;
- Quinn, P. K.;
- LeBel, P. J.;
- Vay, S. A.;
- Roberts, P. D.;
- Norton, R. B.;
- Watkins, B. A.;
- Buhr, M. P.;
- Parrish, D. D.;
- Calvert, J. G.;
- Fehsenfeld, F. C.
Publication type:
Article
Correction [to 'The behavior of some organic nitrates at Boulder and Niwot Ridge, Colorado,' by B. A. Ridley, J. D. Shelter, J. G. Walega, S. Madronich, C. M. Elsworth, F. E. Grahek, F. C. Fehsenfeld, R. B. Norton, D. D. Parrish, G. Hübler, M. Buhr, E. J. Williams, E. J. Allwine and H. H. Westberg]
Published in:
Journal of Geophysical Research. Atmospheres, 1992, v. 97, n. D9, p. 10193, doi. 10.1029/92JD00769
By:
- Ridley, B. A.;
- Shelter, J. D.;
- Walega, J. G.;
- Madronich, S.;
- Elsworth, C. M.;
- Grahek, F. E.;
- Fehsenfeld, F. C.;
- Norton, R. B.;
- Parrish, D. D.;
- Hübler, G.;
- Buhr, M.;
- Williams, E. J.;
- Allwine, E. J.;
- Westberg, H. H.
Publication type:
Article
Carbon monoxide concentrations and their relation to concentrations of total reactive oxidized nitrogen at two rural U.S. sites.
Published in:
Journal of Geophysical Research. Atmospheres, 1991, v. 96, n. D5, p. 9309, doi. 10.1029/91JD00047
By:
- Parrish, D. D.;
- Trainer, M.;
- Buhr, M. P.;
- Watkins, B. A.;
- Fehsenfeld, F. C.
Publication type:
Article
Observations and modeling of the reactive nitrogen photochemistry at a rural site.
Published in:
Journal of Geophysical Research. Atmospheres, 1991, v. 96, n. D2, p. 3045, doi. 10.1029/90JD02395
By:
- Trainer, M.;
- Buhr, M. P.;
- Curran, C. M.;
- Fehsenfeld, F. C.;
- Hsie, E. Y.;
- Liu, S. C.;
- Norton, R. B.;
- Parrish, D. D.;
- Williams, E. J.;
- Gandrud, B. W.;
- Ridley, B. A.;
- Shetter, J. D.;
- Allwine, E. J.;
- Westberg, H. H.
Publication type:
Article
The behavior of some organic nitrates at Boulder and Niwot Ridge, Colorado.
Published in:
Journal of Geophysical Research. Atmospheres, 1990, v. 95, n. D9, p. 13949, doi. 10.1029/JD095iD09p13949
By:
- Ridley, B. A.;
- Shetter, J. D.;
- Walega, J. G.;
- Madronich, S.;
- Elsworth, C. M.;
- Grahek, F. E.;
- Fehsenfeld, F. C.;
- Norton, R. B.;
- Parrish, D. D.;
- Hübler, G.;
- Buhr, M.;
- Williams, E. J.;
- Allwine, E. J.;
- Westberg, H. H.
Publication type:
Article
Intercomparison of NO2 measurement techniques.
Published in:
Journal of Geophysical Research. Atmospheres, 1990, v. 95, n. D4, p. 3579, doi. 10.1029/JD095iD04p03579
By:
- Fehsenfeld, F. C.;
- Drummond, J. W.;
- Roychowdhury, U. K.;
- Galvin, P. J.;
- Williams, E. J.;
- Buhr, M. P.;
- Parrish, D. D.;
- Hübler, G.;
- Langford, A. O.;
- Calvert, J. G.;
- Ridley, B. A.;
- Grahek, F.;
- Heikes, B. G.;
- Kok, G. L.;
- Shetter, J. D.;
- Walega, J. G.;
- Elsworth, C. M.;
- Norton, R. B.;
- Fahey, D. W.;
- Murphy, P. C.
Publication type:
Article
Systematic variations in the concentration of NO x (NO Plus NO2) at Niwot Ridge, Colorado.
Published in:
Journal of Geophysical Research. Atmospheres, 1990, v. 95, n. D2, p. 1817, doi. 10.1029/JD095iD02p01817
By:
- Parrish, D. D.;
- Hahn, C. H.;
- Fahey, D. W.;
- Williams, E. J.;
- Bollinger, M. J.;
- Hübler, G.;
- Buhr, M. P.;
- Murphy, P. C.;
- Trainer, M.;
- Hsie, E. Y.;
- Liu, S. C.;
- Fehsenfeld, F. C.
Publication type:
Article
Measurement of soil NO x emissions in central Pennsylvania.
Published in:
Journal of Geophysical Research. Atmospheres, 1988, v. 93, n. D8, p. 9539, doi. 10.1029/JD093iD08p09539
By:
- Williams, E. J.;
- Parrish, D. D.;
- Buhr, M. P.;
- Fehsenfeld, F. C.;
- Fall, R.
Publication type:
Article

Found: 39

Measurements of pernitric acid at the South Pole during ISCAT 2000.

Unexpected high levels of NO observed at South Pole.

Measurements of OH, H<sub>2</sub>SO<sub>4</sub>, and MSA at the South Pole during ISCAT.

An investigation of South Pole HO<sub>x</sub> chemistry: Comparison of model results with ISCAT observations.

Evidence for photochemical production of ozone at the South Pole surface.

Regional ozone from biogenic hydrocarbons deduced from airborne measurements of PAN, PPN, and MPAN.

Effects of cold shock and phospholipase A<sub>2</sub> on intact boar spermatozoa and sperm head plasma membranes.

Atmospheric chemistry results from the ANTCI 2005 Antarctic plateau airborne study.

Models and observations of the impact of natural hydrocarbons on rural ozone.

Peer-Review of Digital Educational Resources--A Rigorous Review Process Developed by the Climate Literacy and Energy Awareness Network (CLEAN).

Lipid Bilayer Composition Affects Transmembrane Protein Orientation and Function.

Ozone production from Canadian wildfires during June and July of 1995.

A method for the airborne measurement of PAN, PPN, and MPAN.

Hydrogen peroxide dry deposition lifetime determined from observed loss rates in a power plant plume.

Photochemical ozone production in the rural southeastern United States during the 1990 Rural Oxidants in the Southern Environment (ROSE) program.

Emissions lifetimes and ozone formation in power plant plumes.

Are isoforms of capacitating Na<sup>+</sup>K<sup>+</sup>‐ATPase localized to sperm head rafts?

Navigating Climate Science in the Classroom: Teacher Preparation, Perceptions and Practices.

Continuation of the Theme: Outcomes of Climate Literacy Efforts (Part 2).

Effect of Insemination–Ovulation Interval and Addition of Seminal Plasma on Sow Fertility to Insemination of Cryopreserved Sperm.

Existence and importance of Na<sup>+</sup>K<sup>+</sup>-ATPase in the plasma membrane of boar spermatozoa.

Strong wintertime ozone events in the Upper Green River Basin, Wyoming.

Effect of lipoproteins and luteinizing hormone on progesterone production by large and small luteal cells throughout the porcine estrous cycle

Assessment of pollutant emission inventories by principal component analysis of ambient air measurements.

Meteorological mechanisms for transporting O<sub>3</sub> over the western North Atlantic Ocean: A case study for August 24-29, 1993.

Trace gas measurements and air mass classification from a ground station in Taiwan during the PEM-West A experiment (1991).

Relationships between PAN and ozone at sites in eastern North America.

Regional ozone and urban plumes in the southeastern United States: Birmingham, A case study.

Correlation of ozone with NO<sub>y</sub> in photochemically aged air.

The total reactive oxidized nitrogen levels and the partitioning between the individual species at six rural sites in eastern North America.

Peroxy radicals in the ROSE experiment: Measurement and theory.

An intercomparison of five ammonia measurement techniques.

Correction [to 'The behavior of some organic nitrates at Boulder and Niwot Ridge, Colorado,' by B. A. Ridley, J. D. Shelter, J. G. Walega, S. Madronich, C. M. Elsworth, F. E. Grahek, F. C. Fehsenfeld, R. B. Norton, D. D. Parrish, G. Hübler, M. Buhr, E. J. Williams, E. J. Allwine and H. H. Westberg]

Carbon monoxide concentrations and their relation to concentrations of total reactive oxidized nitrogen at two rural U.S. sites.

Observations and modeling of the reactive nitrogen photochemistry at a rural site.

The behavior of some organic nitrates at Boulder and Niwot Ridge, Colorado.

Intercomparison of NO<sub>2</sub> measurement techniques.

Systematic variations in the concentration of NO<sub> x </sub> (NO Plus NO<sub>2</sub>) at Niwot Ridge, Colorado.

Measurement of soil NO<sub> x </sub> emissions in central Pennsylvania.