scholarly journals Erratum: Corrigendum: Solar cycles or random processes? Evaluating solar variability in Holocene climate records

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
T. Edward Turner ◽  
Graeme T. Swindles ◽  
Dan J. Charman ◽  
Peter G. Langdon ◽  
Paul J. Morris ◽  
...  
Keyword(s):  
Random Processes ◽  
Solar Variability ◽  
Solar Cycles ◽  
Holocene Climate ◽  
Climate Records

scholarly journals Solar cycles or random processes? Evaluating solar variability in Holocene climate records

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
T. Edward Turner ◽  
Graeme T. Swindles ◽  
Dan J. Charman ◽  
Peter G. Langdon ◽  
Paul J. Morris ◽  
...  
Keyword(s):  
Solar Variability ◽  
Solar Cycles ◽  
Climate Data ◽  
Critical Approach ◽  
Solar Forcing ◽  
Holocene Climate ◽  
Proxy Records ◽  
Wide Range ◽  
Solar Type

Abstract Many studies have reported evidence for solar-forcing of Holocene climate change across a range of archives. These studies have compared proxy-climate data with records of solar variability (e.g. 14C or 10Be), or have used time series analysis to test for the presence of solar-type cycles. This has led to some climate sceptics misrepresenting this literature to argue strongly that solar variability drove the rapid global temperature increase of the twentieth century. As proxy records underpin our understanding of the long-term processes governing climate, they need to be evaluated thoroughly. The peatland archive has become a prominent line of evidence for solar forcing of climate. Here we examine high-resolution peatland proxy climate data to determine whether solar signals are present. We find a wide range of significant periodicities similar to those in records of solar variability: periods between 40–100 years, and 120–140 years are particularly common. However, periodicities similar to those in the data are commonly found in random-walk simulations. Our results demonstrate that solar-type signals can be the product of random variations alone, and that a more critical approach is required for their robust interpretation.

scholarly journals The Role of Natural Factors on Major Climate Variability in Northern Winter

2016 ◽  
Author(s):  
Indrani Roy
Keyword(s):  
Climate Variability ◽  
Southern Oscillation ◽  
Volcanic Eruptions ◽  
Positive Influence ◽  
Solar Variability ◽  
Solar Cycles ◽  
The North ◽  
Natural Factors ◽  
The North Atlantic Oscillation

This work studies the role of natural factors mainly solar eleven-year cycle variability, and volcanic eruptions on two major modes of climate variability the North Atlantic Oscillation (NAO) and El Niño Southern Oscillation (ENSO) for around last 150 years period. The NAO is the primary factor to regulate Central England Temperature (CET) during winter throughout the period, though NAO is impacted differently by other factors in different time periods. Solar variability has a positive influence on NAO during 1978-1997, which is opposite before that period. Solar NAO lag relationship is also sensitive to the chosen times of reference. Such analyses raise a question about previously proposed mechanism and relationship related to the sun and NAO. The ENSO is seen to be influenced strongly by solar variability and volcanic eruptions in certain periods. This study observes a strong negative association between solar variability and ENSO before the 1950s, which is even opposite during the second half of 20th century. The period 1978-1997, when two strong eruptions coincided with active years of strong solar cycles, the ENSO, and volcanic eruptions suggested the stronger association. Here we show that the mean atmospheric state is important for understanding the connection between solar variability, the NAO and ENSO and associated mechanism.

scholarly journals Solar Variability and Holocene Climate: Evidence from Radiocarbon, Tree-Ring Proxies and Climate System Modeling

PAGES news ◽  
2004 ◽  
Vol 12 (2) ◽  
pp. 13-15
Author(s):  
B Kromer ◽  
M Claussen ◽  
N Latuske ◽  
M Lüken ◽  
S Remmele ◽  
...  
Keyword(s):  
Tree Ring ◽  
System Modeling ◽  
Climate System ◽  
Solar Variability ◽  
Holocene Climate

scholarly journals Response of the Middle Atmosphere to Solar Variability — Model Simulations

1994 ◽  
Vol 143 ◽  
pp. 315-329
Author(s):  
Theresa Y. W. Huang ◽  
Guy P. Brasseur
Keyword(s):  
Solar Cycle ◽  
Middle Atmosphere ◽  
Temperature Response ◽  
Solar Variability ◽  
Solar Cycles ◽  
Heating Rates ◽  
Model Simulations ◽  
Recent Developments ◽  
Indirect Feedback

Solar flux variations could affect the middle atmosphere through modulating the photolysis of chemical series and solar heating rates. Indirect feedback effects from chemical, radiative, and dynamical interactions could provide additional sources for perturbations in the middle atmosphere. In this paper, recent developments in modeling the effect of solar variability on the middle atmosphere is described. For the 27-day solar rotational cycle, the temperature and ozone response in the stratosphere predicted by one- and two-dimensional models compares well with data analyses. For the 11-year solar cycle, model simulations suggest a non-negligible ozone/temperature response compared to changes produced by anthropogenic perturbations in the stratosphere. There is no sufficient long-term atmospheric dataset to establish a statistically significant correlation with the 11-year solar cycle. But in general, agreement between the observational analysis (for periods of one to two solar cycles) and model simulations of the long-term solar variability effect is unsatisfactory.

scholarly journals Robust Response of the East Asian Monsoon Rainband to Solar Variability

2014 ◽  
Vol 27 (8) ◽  
pp. 3043-3051 ◽  
Author(s):  
Liang Zhao ◽  
Jing-Song Wang
Keyword(s):  
Large Scale ◽  
Asian Monsoon ◽  
East Asian Monsoon ◽  
East Asian ◽  
Solar Variability ◽  
Solar Cycles ◽  
Time Period ◽  
Summer Half ◽  
The Mean ◽  
Robust Response

Abstract This study provides evidence of the robust response of the East Asian monsoon rainband to the 11-yr solar cycle and first identify the exact time period within the summer half-year (1958–2012) with the strongest correlation between the mean latitude of the rainband (MLRB) over China and the sunspot number (SSN). This period just corresponds to the climatological-mean East Asian mei-yu season, characterized by a large-scale quasi-zonal monsoon rainband (i.e., 22 May–13 July). Both the statistically significant correlation and the temporal coincidence indicate a robust response of the mei-yu rainband to solar variability during the last five solar cycles. During the high SSN years, the mei-yu MLRB lies 1.2° farther north, and the amplitude of its interannual variations increases when compared with low SSN years. The robust response of monsoon rainband to solar forcing is related to an anomalous general atmospheric pattern with an up–down seesaw and a north–south seesaw over East Asia.

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