Can the Solar Cycle and Climate Synchronize the Snowshoe Hare Cycle in Canada? Evidence from Tree Rings and Ice Cores

@article{Sinclair1993CanTS,
  title={Can the Solar Cycle and Climate Synchronize the Snowshoe Hare Cycle in Canada? Evidence from Tree Rings and Ice Cores},
  author={Anthony R. E. Sinclair and John M. Gosline and Gerald Holdsworth and Charles J Krebs and Stan Boutin and James N. Smith and Rudy Boonstra and Mark R. T. Dale},
  journal={The American Naturalist},
  year={1993},
  volume={141},
  pages={173 - 198}
}
Dark marks in the rings of white spruce less than 50 yr old in Yukon, Canada, are correlated with the number of stems browsed by snowshoe hares. The frequency of these marks is positively correlated with the density of hares in the same region. The frequency of marks in trees germinating between 1751 and 1983 is positively correlated with the hare fur records of the Hudson Bay Company. Both tree marks and hare numbers are correlated with sunspot numbers, and there is a 10-yr periodicity in the… Expand
Demography of snowshoe hares in relation to regional climate variability during a 10-year population cycle in interior Alaska
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The strength of these interactions may increase in importance if the asynchrony of environmental seasonality and life his- tory traits of snowshoe hares becomes more pronounced as the climate continues to change. Expand
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References

SHOWING 1-10 OF 62 REFERENCES
The Newfoundland ice extent and the solar cycle from 1860 to 1988
Sea ice conditions off the east coast of Newfoundland for the last 130 years are presented, forming what is believed to be the longest ice record for the northwestern Atlantic. Because of differencesExpand
Evidence of a 22-year Rhythm of Drought in the Western United States Related to the Hale Solar Cycle since the 17th Century
Families of Drought Area Indices (DAI) have been derived from tree-ring data for the entire U.S. west of the Mississippi River, for each year back to either 1700 or 1600 A.D., depending on the dataExpand
Analysis of a 290-Year Net Accumulation Time Series from Mt. Logan, Yukon
A 102.5-m mechanically continuous firn and ice core sequence retrieved from the Northwest Col of Mt. Logan (latitude 60°30'N; longitude 140°35'W; site location 5340 m a.s.l.) in the Yukon Territory,Expand
A Closer Look at the Effect of the 11-Year Solar Cycle and the Quasi-biennial Oscillation on Northern Hemisphere 700 mb Height and Extratropical North American Surface Temperature
Abstract A recently discovered association between the 11-year solar cycle and the Northern Hemispheric low-frequency atmospheric circulation structure, which is most easily delectable when the twoExpand
Periodic 18.6‐year and cyclic 10 to 11 year signals in northeastern United States precipitation data
Evidence for a narrow band-limited signal with period near 18.6-years is found in 126 out of 136 yearly total precipitation records, and in 1531 out of 1668 monthly records in the northeastern UnitedExpand
Population biology of snowshoe hares. II. Interactions with winter food plants
TLDR
It is suggested that snowshoe hares at Kluane did not experience an absolute food shortage in winter at peak densities, and that a relative food shortage was suggested. Expand
Effect of climate change on fire regimes in northwestern Minnesota
Of all the impacts of projected climate change on forest ecosystems, perhaps the most difficult to forecast is the potential for altered fire frequency and intensity. Fire regimes in forests areExpand
PORCUPINE POPULATION FLUCTUATIONS IN PAST CENTURIES REVEALED BY DENDROCHRONOLOGY
TLDR
During the winter in south-western Colorado, the porcupine feeds almost exclusively on the phloem layer of pinon pine (Pinus edulis) and western yellow pine (P. ponderosa) which is a favoured winter habitat for porcupines. Expand
Association between the 11-Year Solar Cycle, the QBO, and the Atmosphere. Part II: Surface and 700 mb in the Northern Hemisphere in Winter
Abstract Sea level pressure, surface air temperature, and 700-mb temperature and geopotential height show a probable association with the 11-year solar cycle which can be observed only if the dataExpand
Solar–terrestrial influences on weather and climate
During the past century over 1,000 articles have been published claiming or refuting a correlation between some aspect of solar activity and some feature of terrestrial weather or climate.Expand
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