• 1274 Citations
  • 16 h-Index
1986 …2020

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Article
2020

Origin of tungsten and geochemical controls on its occurrence and mobilization in shallow sediments from Fallon, Nevada, USA

Hobson, C., Kulkarni, H. V., Johannesson, K. H., Bednar, A., Tappero, R., Mohajerin, T. J., Sheppard, P. R., Witten, M. L., Hettiarachchi, G. M. & Datta, S., Dec 2020, In : Chemosphere. 260, 127577.

Research output: Contribution to journalArticle

2019

Multidecadal environmental pollution in a mega-industrial area in central Chile registered by tree rings

Muñoz, A. A., Klock-Barría, K., Sheppard, P. R., Aguilera-Betti, I., Toledo-Guerrero, I., Christie, D. A., Gorena, T., Gallardo, L., González-Reyes, Á., Lara, A., Lambert, F., Gayo, E., Barraza, F. & Chávez, R. O., Dec 15 2019, In : Science of the Total Environment. 696, 133915.

Research output: Contribution to journalArticle

5 Scopus citations
2017

A solvent-based extraction fails to remove mobile nitrogen from western redcedar (Thuja plicata)

Bunn, A. G., Helfield, J. M., Gerdts, J. R., Gleaves, D. A., Drake, D. C. & Sheppard, P., Jun 1 2017, In : Dendrochronologia. 44, p. 19-21 3 p.

Research output: Contribution to journalArticle

3 Scopus citations

The First Millennium-Age Araucaria Araucana in Patagonia

Aguilera-Betti, I., Muñoz, A. A., Stahle, D., Figueroa, G., Duarte, F., González-Reyes, Á., Christie, D., Lara, A., González, M. E., Sheppard, P., Sauchyn, D., Moreira-Muñoz, A., Toledo-Guerrero, I., Olea, M., Apaz, P. & Fernandez, A., Jan 1 2017, In : Tree-Ring Research. 73, 1, p. 53-56 4 p.

Research output: Contribution to journalArticle

5 Scopus citations
2016

Streamflow variability in the Chilean Temperate-Mediterranean climate transition (35°S–42°S) during the last 400 years inferred from tree-ring records

Muñoz, A. A., González-Reyes, A., Lara, A., Sauchyn, D., Christie, D., Puchi, P., Urrutia-Jalabert, R., Toledo-Guerrero, I., Aguilera-Betti, I., Mundo, I., Sheppard, P., Stahle, D., Villalba, R., Szejner, P., LeQuesne, C. & Vanstone, J., Mar 30 2016, (Accepted/In press) In : Climate Dynamics. p. 1-16 16 p.

Research output: Contribution to journalArticle

31 Scopus citations
2012

Additional analysis of dendrochemical data of Fallon, Nevada

Sheppard, P. R., Helsel, D. R., Speakman, R. J., Ridenour, G. & Witten, M. L., Apr 5 2012, In : Chemico-Biological Interactions. 196, 3, p. 96-101 6 p.

Research output: Contribution to journalArticle

7 Scopus citations

Comparison of size and geography of airborne tungsten particles in Fallon, Nevada, and sweet home, Oregon, with implications for public health

Sheppard, P. R., Bierman, B. J., Rhodes, K., Ridenour, G. & Witten, M. L., Jan 1 2012, In : Journal of Environmental and Public Health. 2012, 509458.

Research output: Contribution to journalArticle

6 Scopus citations

Exposure to sodium tungstate and Respiratory Syncytial Virus results in hematological/immunological disease in C57BL/6J mice

Fastje, C. D., Harper, K., Terry, C., Sheppard, P. R. & Witten, M. L., Apr 5 2012, In : Chemico-Biological Interactions. 196, 3, p. 89-95 7 p.

Research output: Contribution to journalArticle

8 Scopus citations

Strategies for evaluating the environment-public health interaction of long-term latency disease: The quandary of the inconclusive case-control study

Pleil, J. D., Sobus, J. R., Sheppard, P. R., Ridenour, G. & Witten, M. L., Apr 5 2012, In : Chemico-Biological Interactions. 196, 3, p. 68-78 11 p.

Research output: Contribution to journalArticle

13 Scopus citations

Tungsten toxicity

Witten, M. L., Sheppard, P. R. & Witten, B. L., Apr 5 2012, In : Chemico-Biological Interactions. 196, 3, p. 87-88 2 p.

Research output: Contribution to journalArticle

33 Scopus citations
2011

Relationships between salmon abundance and tree-ring δ 15N: Three objective tests

Drake, D. C., Sheppard, P. J. & Naiman, R. J., Dec 1 2011, In : Canadian Journal of Forest Research. 41, 12, p. 2423-2432 10 p.

Research output: Contribution to journalArticle

8 Scopus citations
2010

Adverse implications of misdating in dendrochronology: Addressing the re-dating of the "Messiah" violin

Grissino-Mayer, H. D., Sheppard, P. R., Cleaveland, M. K., Cherubini, P., Ratcliff, P. & Topham, J., 2010, In : Dendrochronologia. 28, 3, p. 149-159 11 p.

Research output: Contribution to journalArticle

12 Scopus citations

Dendroclimatology: Extracting climate from trees

Sheppard, P. R., Jan 1 2010, In : Wiley Interdisciplinary Reviews: Climate Change. 1, 3, p. 343-352 10 p.

Research output: Contribution to journalArticle

16 Scopus citations

Quantitative assessment of a field-based course on integrative geology, ecology and cultural history

Sheppard, P. R., Donaldson, B. A. & Huckleberry, G., Nov 1 2010, In : International Research in Geographical and Environmental Education. 19, 4, p. 295-313 19 p.

Research output: Contribution to journalArticle

3 Scopus citations
2009

Multiple dendrochronological responses to the eruption of Cinder Cone, Lassen Volcanic National Park, California

Sheppard, P. R., Ort, M. H., Anderson, K. C., Clynne, M. A. & May, E. M., Oct 28 2009, In : Dendrochronologia. 27, 3, p. 213-221 9 p.

Research output: Contribution to journalArticle

12 Scopus citations

Prenatal exposure of mice to tungstate is associated with decreased transcriptome-expression of the putative tumor suppressor gene, DMBT1: Implications for childhood leukemia

Fastje, C. D., Le, K., Sun, N. N., Wong, S. S., Sheppard, P. R. & Witten, M. L., Dec 1 2009, In : Land Contamination and Reclamation. 17, 1, p. 169-178 10 p.

Research output: Contribution to journalArticle

9 Scopus citations

Spatial patterns of tungsten and cobalt on leaf surfaces of trees in Fallon, Nevada

Sheppard, P. R., Hallman, C. L., Rldenour, G. & Witten, M. L., Dec 1 2009, In : Land Contamination and Reclamation. 17, 1, p. 31-41 11 p.

Research output: Contribution to journalArticle

6 Scopus citations
2008

A 700-year history of groundwater recharge in the drylands of NW China

Gates, J. B., Edmunds, W. M., Ma, J. & Sheppard, P. R., Nov 2008, In : Holocene. 18, 7, p. 1045-1054 10 p.

Research output: Contribution to journalArticle

33 Scopus citations

Environmental history of the southwest as a general science education course

Sheppard, P. R., Hallman, C. L. & Towner, R. H., May 2008, In : Journal of Geoscience Education. 56, 3, p. 212-219 8 p.

Research output: Contribution to journalArticle

1 Scopus citations

Multiple dendrochronological signals indicate the eruption of Parícutin volcano, Michoacán, Mexico

Sheppard, P. R., Ort, M. H., Anderson, K. C., Elson, M. D., Vázquez-Selem, L., Clemens, A. W., Little, N. C. & Speakman, R. J., 2008, In : Tree-Ring Research. 64, 2, p. 97-108 12 p.

Research output: Contribution to journalArticle

22 Scopus citations
2007

An advancement in removing extraneous color from wood for low-magnification reflected-light image analysis of conifer tree rings

Sheppard, P. R. & Wiedenhoeft, A., Jan 1 2007, In : Wood and Fiber Science. 39, 1, p. 173-183 11 p.

Research output: Contribution to journalArticle

8 Scopus citations

Morphological and chemical characteristics of airborne tungsten particles of Fallon, Nevada

Sheppard, P. R., Toepfer, P., Schumacher, E., Rhodes, K., Ridenour, G. & Witten, M. L., Aug 1 2007, In : Microscopy and Microanalysis. 13, 4, p. 296-303 8 p.

Research output: Contribution to journalArticle

10 Scopus citations

Multiple environmental monitoring techniques for assessing spatial patterns of airborne tungsten

Sheppard, P. R., Speakman, R. J., Farris, C. & Witten, M. L., Jan 15 2007, In : Environmental Science and Technology. 41, 2, p. 406-410 5 p.

Research output: Contribution to journalArticle

7 Scopus citations

Spatial patterns of tungsten and cobalt in surface dust of Fallon, Nevada

Sheppard, P. R., Speakman, R. J., Ridenour, G., Glascock, M. D., Farris, C. & Witten, M. L., Dec 1 2007, In : Environmental Geochemistry and Health. 29, 5, p. 405-412 8 p.

Research output: Contribution to journalArticle

20 Scopus citations

Temporal variability of tungsten and cobalt in Fallon, Nevada

Sheppard, P. R., Speakman, R. J., Ridenour, G. & Witten, M. L., May 2007, In : Environmental health perspectives. 115, 5, p. 715-719 5 p.

Research output: Contribution to journalArticle

51 Scopus citations

Using lichen chemistry to assess airborne tungsten and cobalt in Fallon, Nevada

Sheppard, P. R., Speakman, R. J., Ridenour, G. & Witten, M. L., Jul 1 2007, In : Environmental Monitoring and Assessment. 130, 1-3, p. 511-518 8 p.

Research output: Contribution to journalArticle

16 Scopus citations
2006

Elevated tungsten and cobalt in airborne particulates in Fallon, Nevada: Possible implications for the childhood leukemia cluster

Sheppard, P. R., Ridenour, G., Speakman, R. J. & Witten, M. L., Jan 1 2006, In : Applied Geochemistry. 21, 1, p. 152-165 14 p.

Research output: Contribution to journalArticle

41 Scopus citations

Solving the "magnification irony" in microscope-based reflected light image analysis of conifer tree rings

Sheppard, P. R. & Singavarapu, S. Y., May 1 2006, In : Journal of Imaging Science and Technology. 50, 3, p. 304-308 5 p.

Research output: Contribution to journalArticle

7 Scopus citations
2005

Dendrochronological responses to the 24 October 1992 tornado at Sunset Crater, northern Arizona

Sheppard, P. R., May, E. M., Ort, M. H., Anderson, K. C. & Elson, M. D., Dec 1 2005, In : Canadian Journal of Forest Research. 35, 12, p. 2911-2919 9 p.

Research output: Contribution to journalArticle

13 Scopus citations

Laser trimming tree-ring cores for dendrochemistry of metals

Sheppard, P. R. & Witten, M. L., 2005, In : Tree-Ring Research. 61, 2, p. 87-92 6 p.

Research output: Contribution to journalArticle

7 Scopus citations

The Italian Mezzogiorno

Sheppard, P., Sep 1 2005, In : Geography Review. 19, 1, p. 14-16 3 p.

Research output: Contribution to journalArticle

1 Scopus citations
2004

A dendroarchaeological re-examination of the "Messiah" violin and other instruments attributed to Antonio Stradivari

Grissino-Mayer, H. D., Sheppard, P. R. & Cleaveland, M. K., Feb 2004, In : Journal of Archaeological Science. 31, 2, p. 167-174 8 p.

Research output: Contribution to journalArticle

23 Scopus citations

Annual precipitation since 515 BC reconstructed from living and fossil juniper growth of northeastern Qinghai Province, China

Sheppard, P. R., Tarasov, P. E., Graumlich, L. J., Heussner, K. U., Wagner, M., Österle, H. & Thompson, L. G., Dec 1 2004, In : Climate Dynamics. 23, 7-8, p. 869-881 13 p.

Research output: Contribution to journalArticle

194 Scopus citations
2003

Dose-dependent transcriptome changes by metal ores on a human acute lymphoblastic leukemia cell line

Sun, N. N., Fastje, C. D., Wong, S. S., Sheppard, P. R., Macdonald, S. J., Ridenour, G., Hyde, J. D. & Witten, M. L., Aug 2003, In : Toxicology and Industrial Health. 19, 10, p. 157-163 7 p.

Research output: Contribution to journalArticle

11 Scopus citations
2002

Mastering the rings

Grissino-Mayer, H. D., Cleaveland, M. K. & Sheppard, P. R., Dec 1 2002, In : Strad. 113, 1344, p. 408-455 48 p.

Research output: Contribution to journalArticle

3 Scopus citations

The climate of the US Southwest

Sheppard, P. R., Comrie, A. C., Packin, G. D., Angersbach, K. & Hughes, M. K., Jan 1 2002, In : Climate Research. 21, 3, p. 219-238 20 p.

Research output: Contribution to journalArticle

Open Access
357 Scopus citations
2000

Effect of extraction pretreatment on radial variation of nitrogen concentration in tree rings

Sheppard, P. R. & Thompson, T. L., Jan 1 2000, In : Journal of Environmental Quality. 29, 6, p. 2037-2042 6 p.

Research output: Contribution to journalArticle

38 Scopus citations
1999
5 Scopus citations
1997

A 1 835 a tree-ring chronology and its preliminary analyses in Dulan region, Qinghai

Kang, X., Graumlich, L. J. & Sheppard, P., Jul 1 1997, In : Chinese Science Bulletin. 42, 13, p. 1122-1124 3 p.

Research output: Contribution to journalArticle

25 Scopus citations
1996

Reflected-light image analysis of conifer tree rings for reconstructing climate

Sheppard, P. R., Graumlich, L. J. & Conkey, L. E., Jan 1 1996, In : Holocene. 6, 1, p. 62-68 7 p.

Research output: Contribution to journalArticle

34 Scopus citations
1995

Tree-ring responses to the 1978 earthquake at Stephens Pass, northeastern California

Sheppard, P. R. & White, L. O., Jan 1 1995, In : Geology. 23, 2, p. 109-112 4 p.

Research output: Contribution to journalArticle

14 Scopus citations
1989

Application of tree-ring analysis to paleoseismology: two case studies

Sheppard, P. R. & Jacoby, G. C., Jan 1 1989, In : Geology. 17, 3, p. 226-229 4 p.

Research output: Contribution to journalArticle

32 Scopus citations
1988

Cross-dating cores as a nondestructive method for dating living, scarred trees

Sheppard, P. R., Means, J. E. & Lassoie, J. P., Jan 1 1988, In : Forest Science. 34, 3, p. 781-789 9 p.

Research output: Contribution to journalArticle

15 Scopus citations

Irregular recurrence of large earthquakes along the San Andreas fault: Evidence from trees

Jacoby, G. C., Sheppard, P. R. & Sieh, K. E., Jan 1 1988, In : Science. 241, 4862, p. 196-199 4 p.

Research output: Contribution to journalArticle

89 Scopus citations
1986

A nondestructive method for dating living, fire-scarred trees in wilderness areas.

Sheppard, P. R. & Lassoie, J. P., Jan 1 1986, In : Unknown Journal. p. 35-38 4 p.

Research output: Contribution to journalArticle

5 Scopus citations