Variations in tree ring stable isotope records from northern Finland and their possible connection to solar activity

Ogurtsov, M. G.; Sonninen, Eloni; Hilasvuori, Emmi; Koudriavtsev, I. V.; Dergachev, V. A.; Jungner, H.

doi:10.1016/j.jastp.2010.02.020

Cited by 13 publications

(5 citation statements)

References 39 publications

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“…They are close to the quasi-200 a (Suess cycle or de Vries cycle) [45] and quasi-70 a-100 a cycle (Gleissberg cycle) [46,47] of solar activity, respectively, which have been found in extensive geological records [34,[48][49][50][51][52][53][54][55][56][57][58][59]. Quasi-200 a and quasi-100 a cycles are extremely notable in research on the global temperature in the last millennium.…”

Section: Periodicity Of Temperature Variationsupporting

confidence: 57%

Amplitudes, rates, periodicities and causes of temperature variations in the past 2485 years and future trends over the central-eastern Tibetan Plateau

et al. 2011

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Amplitudes, rates, periodicities, causes and future trends of temperature variations based on tree rings for the past 2485 years on the central-eastern Tibetan Plateau were analyzed. The results showed that extreme climatic events on the Plateau, such as the Medieval Warm Period, Little Ice Age and 20th Century Warming appeared synchronously with those in other places worldwide. The largest amplitude and rate of temperature change occurred during the Eastern Jin Event (343-425 AD), and not in the late 20th century. There were significant cycles of 1324 a, 800 a, 199 a, 110 a and 2-3 a in the 2485-year temperature series. The 1324 a, 800 a, 199 a and 110 a cycles are associated with solar activity, which greatly affects the Earth surface temperature. The long-term trends (>1000 a) of temperature were controlled by the millennium-scale cycle, and amplitudes were dominated by multi-century cycles. Moreover, cold intervals corresponded to sunspot minimums. The prediction indicated that the temperature will decrease in the future until to 2068 AD and then increase again. central-eastern

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Section: Periodicity Of Temperature Variationsupporting

confidence: 57%

Amplitudes, rates, periodicities and causes of temperature variations in the past 2485 years and future trends over the central-eastern Tibetan Plateau

et al. 2011

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“…They were close to the quasi200a (Suess cycle or de Vries cycle) (Braun et al 2005) and quasi-70-100a cycle of solar activity (Gleissberg cycle) (Eddy 1977;Sonett et al 1990), respectively, which have been proved existing in extensive geological records (Gou et al 2010;Damon and Sonnett 1991;Wang et al 1999a;Cook et al 2000;Hodell et al 2001;Neff et al 2001;Agnihotri et al 2002;Fleitmann et al 2003;Zhong et al 2004;Delmonte et al 2005;Xu et al 2006;Raspopov et al 2008;Ogurtsov et al 2010). Quasi-200a and quasi-100a cycles are extremely notable in global temperature research covering the last millennium.…”

Section: The Influence Of Solar Activity On Climatic Changes In the Lsupporting

confidence: 70%

Asian Monsoon Variability Recorded in Other Archives

Cai

Jin

Zhou

et al. 2014

Late Cenozoic Climate Change in Asia

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This chapter provides an extensive review of paleomonsoon variability on millennial-to decadal time scales in various archives other than loess, including speleothems, lake sediments, peat deposits, desert deposits, marine sediments, corals, ice cores, tree rings, pollen archives and historical documents. Case studies will be presented to introduce the major proxy indexes associated with these archives, and the reconstructed history of Asian monsoon variability. Advances in the study of monsoon variability and the peculiarity of different archives will also be introduced in this chapter.Keywords Speleothems · Lake sediments · Peat · Desert · Marine sediments · Coral · Ice cores · Tree ring · Pollen · Historical documents Overview of Various Paleoclimate ArchivesAs described in the previous chapter, the eolian loess sequence, a unique geological archive in the world, plays an important role in studying the climatic and environmental changes in China as it documents the variability of both Asian monsoon and the aridification of inland Asia. It has the advantages of being relatively continuous and long-lasting for studying the monsoon changes and inland aridifications on tectonic and orbital time scales, and even has the potential for studies of monsoon variations on millennial time scales at some sites. However, other geo-biological archives and historical records are also essential in studying the Asian monsoon changes, as they provide indispensable information for fully understanding Asian monsoon changes and its dynamic forces and environmental effects, especially on the millennial to decadal time scales. For example, taking advantage of high-precision absolute U-series dating, speleothems from karst caves, provide the ages of the abrupt events that occurred within the Asian monsoon regions and make it possible to correlate these events with global climate changes, enhancing greatly our understanding of the linkage between Asian monsoon and global climate change. With multiple proxies, lake sediments are good at providing the integrated information on hydrology, weathering processes, biomass and other aspects within the drainage systems. Coral records may indicate the changes in moisture supply from the tropical ocean, ocean circulation, sea surface temperature and other parameters linked closely with monsoon climate. Tree-ring records provide annual changes of regional temperature, precipitation and the hydrological environment, and are the basis to fully describe the present global warming and the anthropogenic contribution. As the direct index of vegetation, pollen assemblages indicate the succession of vegetation associated with monsoon changes, revealing variations in moisture availability and temperature. Therefore, studies of these various archives, as well as peatbogs, ice cores, marine and desert deposits and historical records, greatly expanded our knowledge of the variability of Asian monsoons and their driving forces.This chapter will focus on various archives used in the study of Asian mon...

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“…(7) Ogurtsov et al (2011) revealed a century-scale connection between solar activity and tree-ring δ 13 C chronology (i.e. stable carbon isotopes from tree rings) for the northernmost Finland (68.56°N, 28.19°E), covering the time interval AD 1600–2002.…”

Section: Introductionmentioning

confidence: 99%

“…Collectively, the presence of the solar-type (century-long and ca 22-year) variations in climate of Northern Fennoscandia and nearby regions has been so far most firmly established. Methodologically, the solar–climatic linkages have been demonstrated over millennial, century-long and bi-decadal timescales by means of various statistical approaches including: (a) Fourier method (Kasatkina et al, 2007), (b) a combination of both the wavelet and Fourier methods (Ogurtsov et al, 2002, 2005, 2013), (c) analysis of correlations between timescale-dependent (“low-pass filtered”) solar and proxy records (Helama et al, 2010; Ogurtsov et al, 2011, 2013, 2020; Sejrup et al, 2010), (d) analysis of correlations between unsmoothed that is, unfiltered raw data (Ogurtsov et al, 2017), and (e) visual comparison of the solar and climatic records (Haltia-Hovi et al, 2007). Thus, it is unlikely that the revealed indications of solar–climatic relationship could be completely attributed to ambiguity of any particular statistical technique.…”

Section: Introductionmentioning

confidence: 99%

Solar-type periodicities in the climate variability of Northern Fennoscandia during the last three centuries: Real influence of solar activity or natural instability in the climate system

Ogurtsov

Helama

Jalkanen³

et al. 2021

The Holocene

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Fifteen proxy records of summer temperature in Fennoscandia, Northern Europe and in Yamal and Taymir Peninsulas (Western Siberia) were analyzed for the AD 1700–2000 period. Century-long (70–100 year) and quasi bi-decadal periodicities were found from proxy records representing different parts of Fennoscandia. Decadal variation was revealed in a smaller number of records. Statistically significant correlations were revealed between the timescale-dependent components of temperature variability and solar cycles of Schwabe (~11 year), Hale (~22 year), and Gleissberg (сentury-long) as recorded in solar activity data. Combining the results from our correlation analysis with the evidence of solar-climatic linkages over the Northern Fennoscandia obtained over the past 20 years suggest that there are two possible explanations for the obtained solar-proxy relations: (a) the Sun’s activity actually influences the climate variability in Northern Fennoscandia and in some regions of the Northern Hemisphere albeit the mechanism of such solar-climatic linkages are yet to be detailed; (b) the revealed solar-type periodicities result from natural instability of climate system and, in such a case, the correlations may appear purely by chance. Multiple lines of evidence support the first assumption but we note that the second one cannot be yet rejected. Guidelines for further research to elucidate this question are proposed including the Fisher’s combined probability test in the presence of solar signal in multiple proxy records.

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Variations in tree ring stable isotope records from northern Finland and their possible connection to solar activity

Cited by 13 publications

References 39 publications

Amplitudes, rates, periodicities and causes of temperature variations in the past 2485 years and future trends over the central-eastern Tibetan Plateau

Amplitudes, rates, periodicities and causes of temperature variations in the past 2485 years and future trends over the central-eastern Tibetan Plateau

Asian Monsoon Variability Recorded in Other Archives

Solar-type periodicities in the climate variability of Northern Fennoscandia during the last three centuries: Real influence of solar activity or natural instability in the climate system

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