Solar-geomagnetic activity influence on Earth's climate

Mufti, S.; Shah, G. N.

doi:10.1016/j.jastp.2010.12.012

Cited by 34 publications

(25 citation statements)

References 49 publications

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“… Kirov and Georgieva [2002] found that solar activity influenced both the intensity and occurrence frequency of El Niño. Mufti and Shah [2011] found a significant positive correlation between the sea surface temperature (SST) anomalies and sunspot indices in both the 11 year and 22 year bands. Similar results showing correlation between solar activity and El Niño are also shown by Weng [2005].…”

Section: Introductionmentioning

confidence: 99%

Analyzing the combined influence of solar activity and El Niño on streamflow across southern Canada

James

Wachowiak

2012

Water Resources Research

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It is well known that the spatial and temporal patterns in streamflow can be correlated with many teleconnections, e.g., solar activity and climatic phenomena such as El Niño. However, fewer studies have attempted to analyze both the influence of solar activity and large scale climatic phenomena on natural processes, particularly hydrological processes. In this study we examine long term records of solar activity and El Niño for their combined influence on streamflow across southern Canada. Data used in the analysis include sunspot number, sea surface temperature anomaly in Niño region 3.4, and annual mean streamflow from 50 Canadian Reference Hydrometric Basin Network (RHBN) stations with record lengths ≥50 years (14 of them ≥90 years). Analysis is performed using Fourier spectrum analysis (FSA), continuous wavelet transform (CWT), and cross wavelet transform coherence analysis (WTC). Results of FSA show that for almost all the 14 RHBN stations with record lengths of ≥90 years, streamflow exhibits periodicities of approximately 11 and 22 years (which is in accordance with solar activity), as well as shorter term periodicities consistent with El Niño (2–7 years). WTC analysis confirms the correlation between these periodicities (2–7 years, 11 years, 22 years) in streamflow with solar activity and El Niño records. Both solar activity and El Niño's influences on annual mean streamflow in 18–32 year bands are common, while the influence of El Nino is more extensive in the 2–7 and ∼11 year bands. Through examination of correlations between solar activity and streamflow, El Niño and streamflow, and finally El Niño and solar activity, WTC analysis has identified that solar activity affects El Niño first, and this influence is then transferred by El Niño to streamflow. This study expands on earlier efforts examining linkages between El Niño and streamflow across southern Canada to an examination of linkages between solar activity, El Niño, and streamflow.

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Section: Introductionmentioning

confidence: 99%

Analyzing the combined influence of solar activity and El Niño on streamflow across southern Canada

James

Wachowiak

2012

Water Resources Research

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“…It is believed that some of these mechanisms are radiative forcing, cosmic rays, the stratospheric solar vortex, cloud cover and albedo, cosmic rays related to changes of the ozone layer, etc. [38], [39]. However, these mechanisms are outside the scope of this paper.…”

Section: Solar Variationmentioning

confidence: 94%

Sea Levels in a Changing Climate

McCrann¹

2018

GEOMATE

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ABSTRACT:The rise of sea levels could have devastating consequences for coastal settlements, and it can easily be one of the most critical effects of climate change. Thus, all factors affecting sea levels need to be considered. One of the factors discussed in this paper is the natural variability of sea levels, which originates from the oscillation of the planets and solar activity. The effect of the Sun's activity on Earth's climate has been identified since the 1800s. However, there are still many unknowns regarding the mechanisms connecting the Earth's climate to the variation in solar irradiance. Climate modelling that implements the solar sciences is a novel approach that accounts for the considerable effect that natural factors have on the climate, especially at regional level. This paper discusses the noticeable effect that planet oscillations have on the Sun's activity, which gives a very good correlation with the observed patterns in global surface temperatures, rainfall records and sea levels. In agreement with many studies that have identified a 60-year cycle in the variation of Earth's temperature, it is expected that surface temperatures will reach a trough of the cycle around 2030-2040. Furthermore, considering the influence of the Solar Inertial Motion, a solar slowdown is predicted for Solar Cycles 24 and 25, which will create a weak grand minimum. It is anticipated that this weak grand minimum will be reflected in a dampening effect of global temperatures, and a subsequent moderation in the rate of sea level rise.

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“…Of course there are numerous other works showing a significant correlation between specific solar indexes and climate records (e.g. : Mufti and Shah [34], Soon [25,35], Soon and Legates [36] and many others).…”

Section: The Sunspot Number Record Is Only a Partial Proxy Of Solar Amentioning

confidence: 99%

Global temperatures and sunspot numbers. Are they related? Yes, but non linearly. A reply to Gil-Alana et al. (2014)

Scafetta

2014

Physica A: Statistical Mechanics and its Applications

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Recently Gil-Alana et al. (Physica A: Statistical Mechanics and its Applications 396, 42-50, 2014) compared the sunspot number record and the temperature record and found that they differ: the sunspot number record is characterized by a dominant 11-year cycle while the temperature record appears to be characterized by a "singularity" or "pole" in the spectral density function at the "zero" frequency. Consequently, they claimed that the two records are characterized by substantially different statistical fractional models and rejected the hypothesis that sun influences significantly global temperatures. I will show that:(1) the "singularity" or "pole" in the spectral density function of the global surface temperature at the "zero" frequency does not exist -the observed pattern derives from the post 1880 warming trend of the temperature signal and is a typical misinterpretation that discrete power spectra of non-stationary signals can suggest; (2) appropriate continuous periodograms clarify the issue and also show a signature of the 11-year solar cycle (amplitude ≤ 0.1 0 C), which since 1850 has an average period of about 10.4 year, and of many other natural oscillations; (3) the solar signature in the surface temperature record can be recognized only using specific techniques of analysis that take into account non-linearity and filtering of the multiple climate change contributions; (4) the post 1880-year temperature warming trend cannot be compared or studied against the sunspot record and its 11-year cycle, but requires solar proxy models showing short and long scale oscillations plus the contribution of anthropogenic forcings, as done in the literature. Multiple evidences suggest that global temperatures and sunspot numbers are quite related to each other at multiple time scales. Thus, they are characterized by cyclical fractional models. However, solar and climatic indexes are related to each other through complex and non-linear processes. Finally, I show that the prediction of a semi-empirical model for the global temperature based on astronomical oscillations and anthropogenic forcing proposed by Scafetta since 2009 has up to date been successful. -Cite as: Scafetta, N., 2014. Global temperatures and sunspot numbers. Are they related? Yes, but non linearly. A reply to Gil-Alana et al. (2014). Physica A: Statistical Mechanics and its Applications 413, 329-342.

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Solar-geomagnetic activity influence on Earth's climate

Cited by 34 publications

References 49 publications

Analyzing the combined influence of solar activity and El Niño on streamflow across southern Canada

Analyzing the combined influence of solar activity and El Niño on streamflow across southern Canada

Sea Levels in a Changing Climate

Global temperatures and sunspot numbers. Are they related? Yes, but non linearly. A reply to Gil-Alana et al. (2014)

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