Secular variation of Delta C-14 during the Medieval Solar Maximum: A progress report

P.E. Damon; C.J. Eastoe; M.K. Hughes; R.M. Kalin; A. Long; A.N. Peristykh

Secular variation of Delta C-14 during the Medieval Solar Maximum: A progress report

P.E. Damon, C.J. Eastoe, M.K. Hughes, R.M. Kalin, A. Long, A.N. Peristykh

Civil And Environmental Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

The Earth is within the Contemporaneous Solar Maximum (CSM), analogous to the Medieval Solar Maximum (MSM). If this analogy is valid, solar activity will continue to increase well into the 21st century, we have completed 75 single-ring and 10 double-ring measurements from AD 1065 to AD 1150 to obtain information about solar activity during this postulated analog to solar activity during the MSM. Delta(14)C decreases steadily during the period AD 1065 to AD 1150 but with cyclical oscillations around the decreasing trend. These oscillations can be successfully modeled by four cycles. These four frequencies are 1/52 yr(-1), 1/22 yr(-1), 1/11 yr(-1), and 1/5.5 yr, i.e., the 4th harmonic of the Suess cycle, the Hale and Schwabe cycles and the 2nd harmonic of the Schwabe cycle.

Original language	English
Pages (from-to)	343-350
Number of pages	8
Journal	Radiocarbon
Volume	40
Issue number	1
Publication status	Published - 1998

Keywords

Contemporaneous Solar Maximum
Medieval Solar Maximum
solar activity
Suess cycle
Hale cycle
Schwabe cycle

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title = "Secular variation of Delta C-14 during the Medieval Solar Maximum: A progress report",

abstract = "The Earth is within the Contemporaneous Solar Maximum (CSM), analogous to the Medieval Solar Maximum (MSM). If this analogy is valid, solar activity will continue to increase well into the 21st century, we have completed 75 single-ring and 10 double-ring measurements from AD 1065 to AD 1150 to obtain information about solar activity during this postulated analog to solar activity during the MSM. Delta(14)C decreases steadily during the period AD 1065 to AD 1150 but with cyclical oscillations around the decreasing trend. These oscillations can be successfully modeled by four cycles. These four frequencies are 1/52 yr(-1), 1/22 yr(-1), 1/11 yr(-1), and 1/5.5 yr, i.e., the 4th harmonic of the Suess cycle, the Hale and Schwabe cycles and the 2nd harmonic of the Schwabe cycle.",

keywords = "Contemporaneous Solar Maximum, Medieval Solar Maximum, solar activity, Suess cycle, Hale cycle, Schwabe cycle",

author = "P.E. Damon and C.J. Eastoe and M.K. Hughes and R.M. Kalin and A. Long and A.N. Peristykh",

note = "16th International Radiocarbon Conference, GRONINGEN, NETHERLANDS, JUN, 1997",

year = "1998",

language = "English",

volume = "40",

pages = "343--350",

journal = "Radiocarbon",

issn = "0033-8222",

number = "1",

}

TY - JOUR

T1 - Secular variation of Delta C-14 during the Medieval Solar Maximum

T2 - A progress report

AU - Damon, P.E.

AU - Eastoe, C.J.

AU - Hughes, M.K.

AU - Kalin, R.M.

AU - Long, A.

AU - Peristykh, A.N.

N1 - 16th International Radiocarbon Conference, GRONINGEN, NETHERLANDS, JUN, 1997

PY - 1998

Y1 - 1998

N2 - The Earth is within the Contemporaneous Solar Maximum (CSM), analogous to the Medieval Solar Maximum (MSM). If this analogy is valid, solar activity will continue to increase well into the 21st century, we have completed 75 single-ring and 10 double-ring measurements from AD 1065 to AD 1150 to obtain information about solar activity during this postulated analog to solar activity during the MSM. Delta(14)C decreases steadily during the period AD 1065 to AD 1150 but with cyclical oscillations around the decreasing trend. These oscillations can be successfully modeled by four cycles. These four frequencies are 1/52 yr(-1), 1/22 yr(-1), 1/11 yr(-1), and 1/5.5 yr, i.e., the 4th harmonic of the Suess cycle, the Hale and Schwabe cycles and the 2nd harmonic of the Schwabe cycle.

AB - The Earth is within the Contemporaneous Solar Maximum (CSM), analogous to the Medieval Solar Maximum (MSM). If this analogy is valid, solar activity will continue to increase well into the 21st century, we have completed 75 single-ring and 10 double-ring measurements from AD 1065 to AD 1150 to obtain information about solar activity during this postulated analog to solar activity during the MSM. Delta(14)C decreases steadily during the period AD 1065 to AD 1150 but with cyclical oscillations around the decreasing trend. These oscillations can be successfully modeled by four cycles. These four frequencies are 1/52 yr(-1), 1/22 yr(-1), 1/11 yr(-1), and 1/5.5 yr, i.e., the 4th harmonic of the Suess cycle, the Hale and Schwabe cycles and the 2nd harmonic of the Schwabe cycle.

KW - Contemporaneous Solar Maximum

KW - Medieval Solar Maximum

KW - solar activity

KW - Suess cycle

KW - Hale cycle

KW - Schwabe cycle

UR - http://strathprints.strath.ac.uk/16285/

UR - http://digitalcommons.library.arizona.edu/objectviewer?o=http%3A%2F%2Fradiocarbon.library.arizona.edu%2FVolume40%2FNumber1%2Fazu_radiocarbon_v40_n1_343_350_v.pdf

M3 - Article

VL - 40

SP - 343

EP - 350

JO - Radiocarbon

JF - Radiocarbon

SN - 0033-8222

IS - 1

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