On glacier retreat and drought cycles in the Rocky Mountains of Montana and Canada

Berger, Wolfgang

doi:10.1016/j.quaint.2009.01.003

Cited by 4 publications

(2 citation statements)

References 40 publications

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“…Like the spectrum of the ENSO reconstruction of Stahle et al [59] this spectrum has a strong peak at 5.76 (the strongest within the band of periods less than 10 years long). Also, and unmistakably, the PDO spectrum contains the tidal cycle of 18.6 (nodal lunar cycle, describing the line-up of Sun, Earth, and Moon) [61,73,74]. In contrast to this strong presence of a lunar signal, there is but negligible power at the solar periods near 11 years.…”

Section: Solar Vs Tidal Cyclesmentioning

confidence: 99%

Discovery of the 5.7-Year Douglass Cycle: A Pioneer’s Quest for Solar Cycles in Tree-Ring Records

Berger¹

2011

TOGEOGJ

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Abstract. The astronomer A.E. Douglass is generally recognized as the founding father of dendrochronology. He studied tree rings in the search for evidence that solar variation (as seen in sunspots) is reflected in climate variation. He was convinced that his quest was successful. Analysis of some of his early data using Fourier decomposition and comparison of tree-ring periodograms with those based on known solar cycles suggests that the cycles he found may not exist or may not be of pure solar origin. The findings here reported suggest a much stronger influence of tides on the tree-ring records than commonly considered. Douglass's great merit as the pioneer of tree-ring dating in archeology and tree-ring-based climatology remains unaffected by the findings here presented.

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Section: Solar Vs Tidal Cyclesmentioning

confidence: 99%

Discovery of the 5.7-Year Douglass Cycle: A Pioneer’s Quest for Solar Cycles in Tree-Ring Records

Berger¹

2011

TOGEOGJ

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“…This phenomenon is influenced by solar activity, e.g., in the forests of the Rocky Mts. in Montana and in Canada [55]. Furthermore, the activity of sunspots can be linked to the occurrence of forest fires, volcanic eruptions, and earthquakes [56][57][58].…”

Section: Introductionmentioning

confidence: 99%

Solar Cycles in Salvage Logging: National Data from the Czech Republic Confirm Significant Correlation

Šimůnek

Vacek

2020

Forests

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Forest ecosystems in Europe undergo cyclic fluctuations with alternating periods of forest prosperity and disturbances. Forest disturbances are caused by large-scale calamities (climate-induced and unforeseen events) resulting in an increased volume of salvage logging. In recent decades, climate change (warming, long-term droughts, more frequent storms, bark beetle outbreaks) has contributed to an increased frequency of salvage logging. However, until now, it has not been revealed what triggers national-scale forest calamities. All of the above-mentioned natural disturbances are connected to solar activity, which is the driver of climate change. This research relates the total volume of harvested timber and salvage logging to the climate and cosmic factors in the Czech Republic, Central Europe. Data of total and salvage logging are compared with air temperatures, precipitation, extreme climatic events, sunspot areas, and cosmic ray intensities. The results document a significant effect of average annual temperatures on the total and salvage logging for the entire period of observations since 1961. A significant correlation of salvage logging to the sunspot area and cosmic ray intensity was observed. The link between salvage logging and sunspots and cosmic ray intensity is supported by spectral analysis in which a significant 11-year cycle was observed since 1973. The results also show an increasing significant effect of sunspots and cosmic ray intensity on logging in recent years in connection with synergism of extreme climate events and the subsequent bark beetle outbreaks. Space and cosmic effects are factors that substantially influence forest ecosystems. Therefore, this paper provides new knowledge about, and possible predictions of, the forest response under climate change.

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High elevation ice patch documents Holocene climate variability in the northern Rocky Mountains

Chellman

Pederson

Lee

et al. 2021

Quaternary Science Advances

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On glacier retreat and drought cycles in the Rocky Mountains of Montana and Canada

Cited by 4 publications

References 40 publications

Discovery of the 5.7-Year Douglass Cycle: A Pioneer’s Quest for Solar Cycles in Tree-Ring Records

Discovery of the 5.7-Year Douglass Cycle: A Pioneer’s Quest for Solar Cycles in Tree-Ring Records

Solar Cycles in Salvage Logging: National Data from the Czech Republic Confirm Significant Correlation

High elevation ice patch documents Holocene climate variability in the northern Rocky Mountains

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