• Navajo Warfare and Economy, 1750-1868

      Kemrer, Meade; Graybill, Donald A.; Laboratory of Tree-Ring Research, University of Arizona; Laboratory of Tree-Ring Research, University of Arizona (University of Alberta (Edmonton, AB), 1970-11)
      Introduction: Dendrochronology has traditionally been employed by archaeologists in a typological sense to provide the necessary spatio-temporal framework for changing attribute or element configurations. In contrast, this paper will stress the potential of dendrochronological analysis as a powerful inferential tool for studying the dynamics of changing human behavior. The most extensive archaeological survey of an ethnically identified population in the American Southwest was conducted between 1953 and 1960 for the Navajo Land Claims Commission. Legally acceptable evidence of Navajo use and occupancy of contested or extra-reservation areas made rigorous time-controls a necessity. These were provided by tree-ring dating, the dating of Navajo ceramics and trade items associated with sites, and through informants who not only knew when sites were occupied, but often the age, sex and clan membership distributions of the former occupants. Criteria for the Navajo identity of structures and features were derived from ethnohistoric research and interviewing Navajos and other persons who had experienced intimate contact with the Navajo people (Littell, 1967).
    • Northern Hemisphere Temperature Estimation Using Blue Group Northern Hemisphere 70-Chronology Set: High Latitude and High Altitude Sites

      LaMarche, Valmore C., Jr.; Cain, Cyra J.; Laboratory of Tree-Ring Research, University of Arizona; Laboratory of Tree-Ring Research, University of Arizona (Laboratory of Tree-Ring Research, University of Arizona (Tucson, AZ), 1986)
    • Past Occurrences of Winters Similar to 1976-1977 as Reconstructed from the Tree-Ring Record

      Lofgren, G. Robert; Fritts, Harold C.; Laboratory of Tree-Ring Research, University of Arizona; Laboratory of Tree-Ring Research, University of Arizona (Laboratory of Tree-Ring Research, University of Arizona (Tucson, AZ), 1977-10)
    • Patterns of Climatic Change Revealed Through Dendroclimatology

      Fritts, Harold C.; Lofgren, G. Robert; Laboratory of Tree-Ring Research, University of Arizona; Laboratory of Tree-Ring Research, University of Arizona (Laboratory of Tree-Ring Research, University of Arizona (Tucson, AZ), 1978-10)
      The objectives of this report are, first, to summarize the findings to date of the dendroclimatic work performed by our research team at the University of Arizona with respect to the broad patterns of climatic variations over North America since 1600 AD. A secondary objective, as stated in the contract, is to select set(s) of those past climatic patterns which most closely resemble or provide a perspective for conditions of climatic variability expressed as possessing a substantial degree of mobility of occurrence by the National Defense University (1978) study of climatic changes.
    • Precipitation and Saguaro Growth

      Hastings, James Rodney; Institute of Atmospheric Physics, University of Arizona (Office of Arid Land Studies, University of Arizona (Tucson, AZ), 1961)
    • Preparation and Analysis of Tree-Ring Specimens From Washington State, USA

      Thompson, Marna Ares; Laboratory of Tree-Ring Research, University of Arizona (Laboratory of Tree-Ring Research, University of Arizona (Tucson, AZ), 1981-11-09)
      The purpose of this project has been to produce tree-ring chronologies from increment cores of Pinus ponderosa collected from an area in Washington State south of the Trail, British Columbia copper smelter. The cores were collected by Carl Fox, now of Southern California Edison, Rosemead, California, in 1977 and delivered to the Laboratory of Tree-Ring Research in 1980. We began work on the project in July, 1981 when funding became available from the Lawrence Livermore Laboratory. According to Carl Fox, the cores were collected from seven sites, three control sites and four pollution sites. We successfully dated cores from all the control sites, but from only two of the pollution sites. We have produced five site chronologies from the dated cores. However, we suggest that because of the nature of the chronologies, the individual core and tree chronologies comprising the site chronologies may provide more meaningful information than the site chronologies for subsequent analyses of the data.
    • Projected Effects of Climatic Variation Upon Water Availability in Western United States (Final Report)

      Stockton, Charles W.; Laboratory of Tree-Ring Research, University of Arizona (Laboratory of Tree-Ring Research, University of Arizona (Tucson, AZ), 1984-10)
    • Projected Effects of Climatic Variation Upon Water Availability in Western United States (Progress Report)

      Stockton, Charles W.; Laboratory of Tree-Ring Research, University of Arizona (Laboratory of Tree-Ring Research, University of Arizona (Tucson, AZ), 1983-07)
    • Publications of the Faculty, College of Mines, and the Staff, Arizona Bureau of Mines (1966-1967)

      University of Arizona. College of Mines. (College of Mines, University of Arizona (Tucson, AZ), 1967)
    • Publications of the Faculty, College of Mines, and the Staff, Arizona Bureau of Mines (1967-1968)

      University of Arizona. College of Mines. (College of Mines, University of Arizona (Tucson, AZ), 1968)
    • Publications of the Faculty, College of Mines, and the Staff, Arizona Bureau of Mines (1968-1969)

      University of Arizona. College of Mines. (College of Mines, University of Arizona (Tucson, AZ), 1969)
    • Publications of the Faculty, College of Mines, and the Staff, Arizona Bureau of Mines (1969-1970)

      University of Arizona. College of Mines. (College of Mines, University of Arizona (Tucson, AZ), 1970)
    • Publications of the Faculty, College of Mines, and the Staff, Arizona Bureau of Mines (1970-1971)

      University of Arizona. College of Mines. (College of Mines, University of Arizona (Tucson, AZ), 1971)
    • Radial Growth Assessment of Western Spruce Budworm Infested Douglas-Fir Trees on the Carson National Forest, New Mexico

      Swetnam, Thomas W.; Laboratory of Tree-Ring Research, University of Arizona (Laboratory of Tree-Ring Research, University of Arizona (Tucson, AZ), 1983-11-03)
      Growth of western spruce budworm (WSBW) infested Douglas-fir (Pseudotsugae menziesii) forests on the Carson National Forest, New Mexico, was assessed through dendrochronological analysis of increment cores extracted at breast height. Comparisons of indexed and filtered host and non-host (ponderosa pine [Pinus ponderosa]), tree-ring chronologies revealed that host tree growth was reduced during past and present WSBW outbreaks. The non -host chronologies were used to remove the non-WSBW growth effects from the host chronologies, and the corrected host tree growth indices were then used to assess growth loss during known outbreak periods. Maximum growth loss during one year was generally greater than 50 percent. The average growth loss for five year periods during outbreaks was approximately 30 to 40 percent, and the maximum growth loss between two years during an outbreak was usually more than 50 percent.
    • Radial Growth Losses in Douglas-Fir and White Fir Caused by Western Spruce Budworm in Northern New Mexico: 1700-1983

      Swetnam, Thomas W.; Laboratory of Tree-Ring Research, University of Arizona (Laboratory of Tree-Ring Research, University of Arizona (Tucson, AZ), 1985-10-31)
      Regional outbreaks of western spruce budworms (Choristoneura occidentalis Freeman) have recurred at least three times in northern New Mexico since the early 1920's when the U. S. Forest Service first began systematic forest-pest surveys and documentation (Lessard 1975, U. S. Forest Service documents). The current outbreak was first noticed in a small area on the Taos Indian Reservation in 1974, and since then the defoliated areas have increased in New Mexico and Arizona to more than 370,000 acres of Federal, Indian, State and private lands (Linnane 1984). Losses in timber values can generally be ascribed to radial growth loss, height growth loss, topkilling, reduced regeneration, and mortality (Carlson et al. 1983, Fellin et al. 1983). A damage assessment project was initiated in 1978 and was aimed at obtaining measurements of some of these losses in budworm infested stands on the Carson National Forest, New Mexico (Holland and Lessard 1979). A large data base has subsequently been developed, including yearly measurements on topkilling, mortality, defoliation, and insect population changes (Stein 1980, 1981, Stein and McDonnell 1982, Rogers 1984). A growth assessment study was undertaken in 1982 to determine the feasibility of using dendrochronological methods to identify the timing of past outbreaks and to quantify radial growth losses associated with budworm defoliation (Swetnam 1984). Results of this work showed that three major outbreaks during the twentieth century were clearly visible in the tree-ring samples obtained from currently infested trees. The radial growth of host trees was corrected for age, climate and other non-budworm environmental effects, and then growth losses were computed as a percentage of expected growth (Swetnam 1984). Additional collections were obtained in 1984 in order to expand the scope of the radial growth study. The objectives included 1) assessment of a larger number of tree -ring samples, 2) comparison of radial growth losses between the two primary host species - Douglas-fir (Pseudotsuga menziesii) and white fir (Abies concolor), 3) comparison of radial growth losses between age classes, and 4) analysis of the relationship between yearly measurements of defoliation, insect populations and radial growth. This report summarizes the findings of the above analyses. Increment core samples from the 1982 collections are included here, therefore this report supersedes the earlier report (Swetnam 1984). Information is also presented on observations derived from the dated tree-ring series on the timing of occurrence of known and inferred spruce budworm outbreaks for the past 284 years (1700- 1983). This is the longest record of spruce budworm occurrence yet developed for western North America.
    • Rates of Slope Degradation as Determined from Botanical Evidence, White Mountains, California

      LaMarche, Valmore C., Jr.; Laboratory of Tree-Ring Research, University of Arizona (United States Government Printing Office (Washington, D.C.), 1968)
    • Recent Developments in New World Dendrochronology

      Bannister, Bryant; Laboratory of Tree-Ring Research, University of Arizona (1966)
    • Reconstruction of Past Climatic Variability: Final Technical Report

      Fritts, Harold C.; Blasing, T. J.; DeWitt, E.; Lofgren, G. R.; McDougall, K. B.; Shatz, D. J.; Sherwood, J.A.; Stevens, D. W.; Winter, C. L.; Wiseman, M. A.; et al. (Laboratory of Tree-Ring Research, University of Arizona (Tucson, AZ), 1976-03-01)
      Results are reported from the first three years of a five-year project to reconstruct past climatic fluctuations in the Northern Hemisphere from variations in the growth rings of trees. The most significant result is the growing international collaboration stimulated by this research effort. The second is the development of 127 high-quality tree-ring chronologies from North America and Europe. Other developments include the establishment of the International Tree-Ring Data Bank, evaluation of multivariate techniques for calibration and analysis, the selection of a revised data set for reconstructing North American climate, and several other technical achievements. These results now will be used to improve reconstructions of past climate and to expand them to eastern North America and Europe.
    • Report Submitted to the National Science Foundation Climate Dynamics Program on the Dendroclimatology Workshop held at the Laboratory of Tree-Ring Research

      Fritts, Harold C.; Laboratory of Tree-Ring Research, University of Arizona (Laboratory of Tree-Ring Research, University of Arizona (Tucson, AZ), 1977-11-01)
    • Riparian dendrochronology: a method for determining flood histories of ungaged watersheds

      Laing, David; Stockton, Charles Wayne; Laboratory of Tree-Ring Research, University of Arizona (Laboratory of Tree-Ring Research, University of Arizona (Tucson, AZ), 1976-08)
      Examination of 106 crossdated tree-ring cores from the riparian zone of Pine Creek near Escalante, Utah, 10 cores from Bright Angel Creek, Grand Canyon, Arizona, 8 cores from South Taylor Creek, Zion National Park, Utah, and 5 cores from the Animas River near Silverton, Colorado, has yielded the following information: 1. Various riparian gymnosperm and angiosperm species crossdate with semi-arid site gymnosperms. 2. Tree growth is best correlated with snowpack water equivalent. 3. Flood damage to trees is manifested in growth suppression on root exposure or burial, in reaction wood on tilting, and in scarring. 4. Flood damage is very infrequent at Pine Creek from 1700 to 1880, more so from 1880 to 1909, and very frequent from 1909 to the present. (The town of Escalante was settled in 1875, and stocking of the range around Pine Creek reached a maximum shortly after 1900.) 5. Flood damage shows fairly constant frequency in the Bright Angel Creek watershed, which has seen little land use. 6. Flood damage on South Taylor Creek shows a marked increase in frequency between about 1900 and 1937 when the region was included in Zion National Monument, after which flood damage declined markedly in frequency.