A5026883195- Geology and Paleoclimatology Research
- Tree-ring climate responses
- Climate change and permafrost
- Cryospheric studies and observations
- Plant Water Relations and Carbon Dynamics
- Climate variability and models
- Forest ecology and management
- Methane Hydrates and Related Phenomena
- Landslides and related hazards
- Archaeology and ancient environmental studies
- Fire effects on ecosystems
- Aeolian processes and effects
- Species Distribution and Climate Change
- Lichen and fungal ecology
- Isotope Analysis in Ecology
- Coastal wetland ecosystem dynamics
- Plant Ecology and Soil Science
- Marine and environmental studies
- Hydrology and Sediment Transport Processes
- Indigenous Studies and Ecology
- Arctic and Antarctic ice dynamics
- Geological Studies and Exploration
- Remote Sensing and LiDAR Applications
- Oceanographic and Atmospheric Processes
- Light effects on plants
College of Wooster
2014-2024
Columbia University
2017-2024
Lamont-Doherty Earth Observatory
1996-2024
University at Buffalo, State University of New York
1990-1993
Correlation of geologic histories from 130 Alaskan glaciers with a record solar variation suggests that multi‐decadal to century‐scale temperature variations in the North Pacific and Arctic sectors have been influenced by forcing over past thousand years. Mountain glacier fluctuations are primarily summer cooling composite glacial history three climatic regions across Alaska shows ice expansions approximately every 200 years, compatible mode variability. The modulating effects cold phases...
Many dendroclimatic studies have been conducted in Alaska to understand recent climate changes, identify past and current warming trends, determine how change may influence ecosystems. Four new white spruce ( Picea glauca [Moench] Voss) ring‐width chronologies from four sites along a 30 kilometer north‐south transect the Lake Clark National Park Preserve on Alaskan Peninsula span common interval AD 1769 2003. Two show an internally consistent positive growth response increasing April–July...
A 1200-year-long tree-ring width record from living and subfossil mountain hemlock wood is used to reconstruct February through August temperatures for the Gulf of Alaska, providing a past climate variability Northeast Pacific sector that captures interannual centennial timescales. The moderate elevation at sites has allowed these trees retain their temperature signal without evidence so-called divergence effect, or underestimation inferred trends, which observed many northern latitude...
Tree-ring studies at 13 glacier forefields in western Prince William Sound show‘Little Ice Age’ glacial fluctuations were strongly synchronous on decadal timescales. Cross-dated glacially overrun trees eight sites indicate ice margins advanced the early (late twelfth through thirteenth centuries) and middle (seventeenth to eighteenth centuries)‘Little Age’. dates of 22 moraines glaciers show two main periods stabilization. The earlier these, first decades century, overlaps with second period...
Abstract Variations in both width and density of annual rings from a network tree chronologies were used to develop high-resolution proxies extend the climate record Wrangell Mountain region Alaska. We developed warm-season (July–September) temperature reconstruction that spans A.D. 1593–1992 based on first eigenvector principal component analysis six maximum latewood (MXD) chronologies. The climate/tree-growth model accounts for 51% variance 1958 1992 shows cold late 1600s–early 1700s...
Research Article| February 01, 1994 Late Holocene, high-resolution glacial chronologies and climate, Kenai Mountains, Alaska GREGORY C. WILES; WILES 1Department of Geology, University at Buffalo, 415 Fronczak Hall, Amherst, New York 14260 Search for other works by this author on: GSW Google Scholar PARKER E. CALKIN Author Article Information Publisher: Geological Society America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print 0016-7606 GSA Bulletin (1994) 106 (2): 281–303....
Abstract Analyses of instrumental data demonstrate robust linkages between decadal-scale North Pacific and tropical Indo-Pacific climatic variability. These encompass common regime shifts, including the noteworthy 1976 transition in climate. However, information on decadal variability high-latitude climate connection is limited prior to twentieth century. Herein tree-ring analysis employed extend understanding related over past four centuries. To this end, a reconstruction December–May index...
Research Article| January 01, 2006 Expansion of alpine glaciers in Pacific North America the first millennium A.D. Alberto V. Reyes; Reyes 1Department Earth and Atmospheric Sciences, University Alberta, Edmonton, Alberta T6G 2E3, Canada Search for other works by this author on: GSW Google Scholar Gregory C. Wiles; Wiles 2Department Geology, The College Wooster, Ohio 44691, USA Dan J. Smith; Smith 3University Victoria Tree-Ring Laboratory, Department Geography, Victoria, British Columbia V8W...
Research Article| July 01, 2002 Late Holocene glacier fluctuations in the Wrangell Mountains, Alaska Gregory C. Wiles; Wiles 1Department of Geology, College Wooster, Ohio 44691, USA Search for other works by this author on: GSW Google Scholar Gordon Jacoby; Jacoby 2Tree Ring Laboratory, Lamont-Doherty Earth Observatory, Columbia University, Palisades, New York 10964, Nicole K. Davi; Davi Ryan P. McAllister 3Department GSA Bulletin (2002) 114 (7): 896–908....
Abstract The study of community succession is one the oldest pursuits in ecology. Challenges remain terms evaluating predictability and reliability chronosequence methods typically used to development. research William S. Cooper Glacier Bay National Park an early well‐known example successional ecology that provides a long‐term observational data set test hypotheses derived from space‐for‐time substitutions. It also unique opportunity explore importance historical contingencies as...