Evidence for the Gleissberg solar cycle at the high-latitudes of the Northern Hemisphere

Ogurtsov, M. G.; Lindholm, Markus; Jalkanen, Risto; Veretenenko, S. V.

doi:10.1016/j.asr.2014.11.031

Cited by 18 publications

(15 citation statements)

References 36 publications

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“…Shindell et al examined the climate response to the solar forcing at the Maunder Minimum and indicated that even relatively small solar activity might play a primary role in century-scale climate change in NH (Shindell et al, 2001). The possible solar contribution of the Gleissberg century cycle to climate changes over at least the last millennium is mainly concentrated in the North Atlantic region (Moffa-Sánchez et al, 2014;Ogurtsov et al, 2002b;Ogurtsov et al, 2002a;Ogurtsov et al, 2015). Our reconstruction provides strong evidence for negative link between the Gleissberg solar cycle and humidity changes at century timescales.…”

Section: The Role Of the Gleissberg Cyclementioning

confidence: 62%

Humidity changes and possible forcing mechanisms over the last millennium in arid Central Asia

Feng

Liu

Shi

et al. 2021

Preprint

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Abstract. Hydroclimate changes have exerted a significant influence on the historical trajectory of ancient civilizations in arid Central Asia where the central routes of the Silk Road have been hosted. However, the climate changes at different time scales and their possible forcing mechanisms over the last millennium remain unclear due to low-resolution records. Here, we provide a continuous high-resolution humidity history in arid Central Asia over the past millennium based on the ~1.8-year high-resolution multiproxy records with good chronological control from Lake Dalongchi in the central Tianshan Mountains. Generally, the climate was dry during the Medieval Warm Period (MWP) and Current Warm Period (CWP), and wet during the Little Ice Age (LIA), which could be attributed to the influence of the North Atlantic Oscillation (NAO) and the Atlantic Multidecadal Oscillation (AMO). Furthermore, we find that the humidity oscillation was dramatic and unstable at multidecadal to century-scale, especially within the LIA. The continuous wavelet analysis and wavelet coherence show that the humidity oscillation is modulated by the Gleissberg cycle at the century-scale and by the quasi-regular period of El Niño-Southern Oscillation (ENSO) at the multidecadal scale. Our findings suggest that the effect of the solar cycle and the quasi-regular period of ENSO should be seriously evaluated for hydroclimate predictions and climate simulations in arid Central Asia in the future.

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Section: The Role Of the Gleissberg Cyclementioning

confidence: 62%

Humidity changes and possible forcing mechanisms over the last millennium in arid Central Asia

Feng

Liu

Shi

et al. 2021

Preprint

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“…Jiang et al [5] found apparent correlation between changes in sea surface temperature in the North Atlantic and variations in the Sun's activity during the last 4000 years over time scales from hundreds of years down to periods of 10 -20 years. Plausible evidence for century-scale correlation between the Sun's activity and summer temperatures of high-latitude regions of the Northern Hemisphere was obtained by Ogurtsov et al [6]. Solar influence on climate was found to be more evident over Northern Fennoscandia than elsewhere [7] [8].…”

Section: Introductionmentioning

confidence: 72%

No Solar Signal in Temperature Proxies from Antarctica

Ogurtsov¹,

Lindholm²,

Jalkanen³

et al. 2015

ACS

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We analyzed a number of Antarctic climatic proxies including: 1) an annual proxy covering the time interval 1800-2003, 2) four low-resolution (tens to hundreds of years) ice core records covering the last 242,000 years. The main goal of the work was to search for traces of solar influence on Antarctic climate. Both Fourier and wavelet approaches were used in the statistical analyses. We found no evident fingerprints of solar cycles of Schwabe (ca 11 years), Hale (ca 22 years), Gleissberg (century-scale) or Hallstatt (ca 2000 years). Instead a strong variation with period ca 9800 -11,600 years is present in the long temperature proxies during the last 242,000 years. It was shown that this variation likely was the result of varying CO2 concentration in the atmosphere, although some solar influence cannot be fully excluded. No features of a quasi 10,000 year variation were found in the Greenland δ 18 O record. The results show that solar-climatic relationship in Antarctica is weaker than in the high-latitude areas of the Northern Hemisphere.

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“…The AMO cycle of 67.8 years is consistent with periodic climate cycles found in numerous geophysical datasets (see [6]). There is some evidence for northern hemisphere climate periodicities of 60-70 years being linked to solar activity [17]. A mechanism has been proposed for linking hemispheric temperature oscillations, with the North Atlantic playing a key role [18].…”

Section: Discussionmentioning

confidence: 99%

Global Temperature Trends Adjusted for Unforced Variability

Loehle¹

2015

ujg

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Multidecadal climate variability has proven difficult to deal with when estimating temperature trends. This possible unforced internal oscillation of the climate system provides an opportunity to correct temperature trends. The Atlantic Multidecadal Oscillation (AMO) is proposed as a potential index for this unforced variability. The AMO pattern does not appear to correspond to forcing histories used by the IPCC. Subtracting a scaled version of the AMO from the Hadley global temperature data produced damped decadal-scale fluctuations in the temperature data. The adjusted dataset is highly correlated with the anthropogenic forcing history from IPCC AR5. The linear post-1970 temperature trend is 0.83°C/century vs. 1.63°C/century for the raw data. Thus almost exactly half of the post-1970 warming is possibly natural. The use of the AMO as an index of unforced variability is supported by the fact that subtracting it simplifies the temperature response by damping the peaks and troughs consistently.

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Evidence for the Gleissberg solar cycle at the high-latitudes of the Northern Hemisphere

Cited by 18 publications

References 36 publications

Humidity changes and possible forcing mechanisms over the last millennium in arid Central Asia

Humidity changes and possible forcing mechanisms over the last millennium in arid Central Asia

No Solar Signal in Temperature Proxies from Antarctica

Global Temperature Trends Adjusted for Unforced Variability

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