• 1208 Citations
  • 16 h-Index
1986 …2019
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Research Output 1986 2019

  • 1208 Citations
  • 16 h-Index
  • 46 Article
  • 4 Chapter
  • 1 Conference contribution
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Article
2019
1 Citation (Scopus)

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

tree ring
Pollution
Decontamination
Air quality
pollution
2017
2 Citations (Scopus)

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

Thuja plicata
nitrogen
tree ring
growth rings
pretreatment
4 Citations (Scopus)

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

Araucaria araucana
endangered species
Argentina
2016
26 Citations (Scopus)

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

tree ring
streamflow
river
confluence
twentieth century
2012
4 Citations (Scopus)

Additional analysis of dendrochemical data of Fallon, Nevada

Sheppard, P., 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

Cobalt
Tungsten
Contamination
Powders
Metals
6 Citations (Scopus)

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

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

Research output: Contribution to journalArticle

Geography
Tungsten
Public Health
Leukemia
Heavy Metals
6 Citations (Scopus)

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. & Witten, M. L., Apr 5 2012, In : Chemico-Biological Interactions. 196, 3, p. 89-95 7 p.

Research output: Contribution to journalArticle

Respiratory Syncytial Viruses
Hematologic Diseases
Immune System Diseases
Inbred C57BL Mouse
Viruses
12 Citations (Scopus)

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., Ridenour, G. & Witten, M. L., Apr 5 2012, In : Chemico-Biological Interactions. 196, 3, p. 68-78 11 p.

Research output: Contribution to journalArticle

Environment and Public Health
Public health
Case-Control Studies
Tungsten
Cobalt
31 Citations (Scopus)

Tungsten toxicity

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

Research output: Contribution to journalArticle

Tungsten
Toxicity
Health
Military applications
Poisons
2011
8 Citations (Scopus)

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

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

Research output: Contribution to journalArticle

growth rings
tree ring
salmon
riparian soils
testing
2010
12 Citations (Scopus)

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

Grissino-Mayer, H. D., Sheppard, P., Cleaveland, M. K., Cherubini, P., Ratcliff, P. & Topham, J., 2010, In : Dendrochronologia. 28, 3, p. 124-132 9 p.

Research output: Contribution to journalArticle

dendrochronology
growth rings
tree ring
autocorrelation
exercise
14 Citations (Scopus)

Dendroclimatology: Extracting climate from trees

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

Research output: Contribution to journalArticle

dendroclimatology
tree ring
climate
dendrochronology
reconstruction
2 Citations (Scopus)

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

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

Research output: Contribution to journalArticle

cultural history
sense of place
ecology
geology
student
2009
10 Citations (Scopus)

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

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

Research output: Contribution to journalArticle

cinder cone
seed cones
national parks
national park
volcanic eruption
9 Citations (Scopus)

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. & Witten, M. L., 2009, In : Land Contamination and Reclamation. 17, 1, p. 169-178 10 p.

Research output: Contribution to journalArticle

Viruses
tumor
Tungsten
Tumors
arsenite
6 Citations (Scopus)

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

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

Research output: Contribution to journalArticle

tungsten
cobalt
Tungsten
Cobalt
road
2008
32 Citations (Scopus)

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

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

Research output: Contribution to journalArticle

recharge
groundwater
history
desert
vadose zone
1 Citation (Scopus)

Environmental history of the southwest as a general science education course

Sheppard, P., 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

environmental history
environmental issue
education
history
interaction
20 Citations (Scopus)

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

Sheppard, P., 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

volcanoes
volcano
volcanic eruption
Mexico
seed cones
2 Citations (Scopus)

Tungsten and cobalt: Sheppard et al. Respond

Sheppard, P., Speakman, R. J., Ridenour, G. & Witten, M. L., May 2008, In : Environmental Health Perspectives. 116, 5

Research output: Contribution to journalArticle

Tungsten
tungsten
Cobalt
cobalt
2007
8 Citations (Scopus)

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

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

Research output: Contribution to journalArticle

latewood
growth rings
tree ring
image analysis
Image analysis
9 Citations (Scopus)

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

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

Research output: Contribution to journalArticle

Tungsten
tungsten
Dust
Cobalt
Metals
7 Citations (Scopus)

Multiple environmental monitoring techniques for assessing spatial patterns of airborne tungsten

Sheppard, P., 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

Tungsten
tungsten
environmental monitoring
Monitoring
Metals
19 Citations (Scopus)

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

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

Research output: Contribution to journalArticle

Tungsten
tungsten
Cobalt
Dust
cobalt
48 Citations (Scopus)

Temporal variability of tungsten and cobalt in Fallon, Nevada

Sheppard, P., 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

Tungsten
tungsten
Cobalt
cobalt
Leukemia
16 Citations (Scopus)

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

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

Research output: Contribution to journalArticle

Tungsten
tungsten
Cobalt
lichen
cobalt
2006
1 Citation (Scopus)
tungsten
cobalt
Tungsten
Cobalt
leukaemia
39 Citations (Scopus)

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

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

Research output: Contribution to journalArticle

Tungsten
tungsten
Cobalt
cobalt
Dust
7 Citations (Scopus)
Tungsten
tungsten
Cobalt
cobalt
Dust
7 Citations (Scopus)

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

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

Research output: Contribution to journalArticle

conifers
magnification
image analysis
Image analysis
Microscopes
2005
13 Citations (Scopus)

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

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

Research output: Contribution to journalArticle

tornadoes
tornado
crater
growth rings
Pinus ponderosa
7 Citations (Scopus)

Laser trimming tree-ring cores for dendrochemistry of metals

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

Research output: Contribution to journalArticle

growth rings
tree ring
pruning
laser
lasers
1 Citation (Scopus)

The Italian Mezzogiorno

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

Research output: Contribution to journalArticle

regional planning
regional development
EU
migration
Europe
2004
22 Citations (Scopus)

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

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

Research output: Contribution to journalArticle

examination
authenticity
attribution
Violin
Tree Rings
189 Citations (Scopus)

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

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

Research output: Contribution to journalArticle

fossil
rainfall
climate
anthropogenic effect
flooding
2003
9 Citations (Scopus)

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., Macdonald, S. J., Ridenour, G., Hyde, J. D. & Witten, M. L., Oct 2003, In : Toxicology and Industrial Health. 19, 7-10, p. 157-163 7 p.

Research output: Contribution to journalArticle

Precursor Cell Lymphoblastic Leukemia-Lymphoma
Transcriptome
Ores
Metals
Cells
2002
3 Citations (Scopus)

Mastering the rings

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

Research output: Contribution to journalArticle

Ring
341 Citations (Scopus)

The climate of the US Southwest

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

Research output: Contribution to journalArticle

climate
Drought
Precipitation (meteorology)
drought
temperature
2000
36 Citations (Scopus)

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

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

Research output: Contribution to journalArticle

tree ring
Wood
Nitrogen
Availability
nitrogen
1999
5 Citations (Scopus)
growth rings
tree ring
image analysis
Image analysis
conifers
1997
25 Citations (Scopus)

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

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

Research output: Contribution to journalArticle

1996
30 Citations (Scopus)

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

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

Research output: Contribution to journalArticle

tree ring
image analysis
coniferous tree
climate
elephant
1995
14 Citations (Scopus)

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

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

Research output: Contribution to journalArticle

tree ring
earthquake
rupture
graben
calibration
1989
32 Citations (Scopus)

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

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

Research output: Contribution to journalArticle

tree ring
earthquake
San Andreas Fault
seismic hazard
analysis
1988
15 Citations (Scopus)

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

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

Research output: Contribution to journalArticle

nondestructive methods
dating
method
87 Citations (Scopus)

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

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

Research output: Contribution to journalArticle

San Andreas Fault
earthquake
rupture
winter