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Author name code: schove
ADS astronomy entries on 2022-09-14
author:Schove, D. Justin
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Title: Chronology of eclipses and comets, A.D. 1-1000
Authors: Schove, Derek Justin; Fletcher, Alan
1987ceca.book.....S Altcode: 1987QB541.S34......
No abstract at ADS
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Title: Book-Review - Chronology of Eclipses and Comets
Authors: Schove, D. J.; Fletcher, A.
1986Obs...106...92S Altcode:
No abstract at ADS
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Title: Book-Review - Chronology of Eclipses and Comets 1-1---AD
Authors: Schove, D. J.; Fletcher, A.
1985S&T....70Q.336S Altcode:
No abstract at ADS
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Title: Book-Review - Sunspot Cycles
Authors: Schove, D. J.; Kopecky, M.
1985BAICz..36..252S Altcode:
No abstract at ADS
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Title: Book-Review - Sunspot Cycles
Authors: Schove, D. J.
1985S&T....69Q.132S Altcode:
No abstract at ADS
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Title: Chronology of eclipses and comets, AD 1-1000
Authors: Schove, Derek Justin
1984ceca.book.....S Altcode: 1984QB541.S34......
No abstract at ADS
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Title: Sunspot cycles and global oscillations.
Authors: Schove, D. J.
1984ccym.conf..257S Altcode:
No abstract at ADS
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Title: Maya Correlations Mood Ages and Astronomical Cycles
Authors: Schove, D. J.
1984JHA....15...18S Altcode:
No abstract at ADS
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Title: Sunspot, auroral, radiocarbon and climatic fluctuations since
7000 BC.
Authors: Schove, D. J.
1983AnGeo...1..391S Altcode:
No abstract at ADS
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Title: Sunspot cycles.
Authors: Schove, D. J.
1983sucy.book.....S Altcode: 1983STIA...8429019S
Papers on various aspects of sunspot cycles are presented. Early
and recent papers on sunspots, aurorae, the eleven-year and longer
cycles, sunspots in history and their effect on climate, and varves
and geological cycles are included. Several papers on ancient aurorae
are given. No individual items are abstracted in this volume
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Title: Sunspot cycles
Authors: Schove, Derek Justin
1982sucy.book.....S Altcode: 1982QB525.S86......
No abstract at ADS
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Title: The 200-, 22- and 11-YEAR Cycles and Long Series of Climatic
Data Mainly Since a. D. 200
Authors: Schove, D. J.
1981sucl.conf...87S Altcode:
No abstract at ADS
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Title: Aurorae, sunspots and weather, mainly since A.D. 1200
Authors: Schove, D. J.
1981epua.proc..421S Altcode:
A further set of rules is incorporated into those employed by the
Spectrum of Time project to estimate sunspot activity and the dates of
maxima and minima, where (1) the time between sunspot maxima depends
on the ratio of the amplitudes, and (2) the time of rise is usually
dependent on the strength of the next maxima, and the time of fall
is low when a moderate cycle is followed by a strong one. Sun-weather
relationships can be investigated by means of long time series of ice
core, tree ring or varve data, if sunspot cycle amplitude classes are
taken into account. The sun affects the weather indirectly through the
atmospheric pressure parameter, which responds differently to strong
and weak sunspot cycles.
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Title: Sunspot Turning-Points and Aurorae Since A. D. 1510
Authors: Schove, D. J.
1979SoPh...63..423S Altcode:
Dates of solar maxima and minima extending back to c. 1610 were
estimated by Wolf and Wolfer at Zürich (Waldmeier, 1961) in the
nineteenth century, and those back to c. 1710 have been generally
accepted. Slight modifications have already been suggested by the author
(Schove, 1967) for the seventeenth century, although, in that century,
even the existence of the eleven-year cycle has been questioned
(Eddy, 1976). In the course of any sunspot cycle we find a pattern
of the aurorae in place and time characteristic of sunspot cycles of
the particular amplitude-class. These patterns since c. 1710 can be
linked to the precise dates of the Zürich turning-points by a set of
empirical rules. A sunspot rule is based on the Gnevyshev gap, the gap
in large sunspots near the `smoothed' maximum. These rules are here
applied to the period c. 1510-1710 to give improved determination of
earlier turning-points, and approximately confirm the dates given for
the seventeenth century by Wolfer and for most of the later sixteenth
century by Link (1978). Some turning-points for the fifteenth century
and revised sunspot numbers for the period 1700-48 are also given.
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Title: Reflections of the Maunder Minimum of sunspots.
Authors: Gleissberg, W.; Damboldt, T.; Schove, D. J.
1979JBAA...89..440G Altcode:
No abstract at ADS
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Title: Maya chronology and planetary conjunctions.
Authors: Schove, D. J.
1977JBAA...88...38S Altcode:
No abstract at ADS
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Title: Maya dates AD 352-1296
Authors: Schove, D. J.
1977Natur.268..670S Altcode:
No abstract at ADS
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Title: The Mayas and the planets, AD 293 - 1237.
Authors: Schove, D. J.
1976JBAA...86..466S Altcode:
No abstract at ADS
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Title: Mayan chronology and `the spectrum of time'
Authors: Schove, D. J.
1976Natur.261..471S Altcode:
By applying methods used in varve<SUP>1</SUP> and tree-ring<SUP>2</SUP>
analysis to link the floating Mayan chronology with the anchored
chronology of calculated planetary positions a new correlation has
been derived. The intervals between certain Mayan dates are known
to be multiples of the synodic periods of several planets. Mayan
astronomers are assumed to have observed close conjunctions of two or
more planets; this is tested by comparisons with observed or calculated
conjunctions. I conclude that the Mayan dates as conventionally
expressed are 27.3 yr too old. The suggested correlation number is
594,250 +/- 1d, the difference between the Julian and the Mayan day
numbers.
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Title: Comet chronology in numbers, AD 200 - 1882.
Authors: Schove, D. J.
1975JBAA...85..401S Altcode:
No abstract at ADS
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Title: The Leonids: Who SAW Them First?
Authors: Schove, D. J.
1972S&T....43..156S Altcode:
No abstract at ADS
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Title: Astro-Archaeology Symposium
Authors: Schove, D. J.
1970JBAA...80..382S Altcode:
No abstract at ADS
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Title: Solar-terrestrial relationships, Brussels, 1968 Sept.
Authors: Schove, D. J.
1969JBAA...79..384S Altcode:
No abstract at ADS
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Title: Eclipses, Comets and the Spectrum of Time in Africa
Authors: Schove, D. J.
1968JBAA...78...91S Altcode:
No abstract at ADS
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Title: Solar cycles and equatorial climates
Authors: Schove, D. J.
1964GeoRu..54..448S Altcode:
Solar cycles and equatorial climates
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Title: Halley's Comet and Kamienski's Formula
Authors: Schove, D. Justin
1956JBAA...66..131S Altcode:
No abstract at ADS
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Title: Halley's Comet, I: 1930 B.C. to A.D. 1986
Authors: Schove, D. Justin
1955JBAA...65..285S Altcode:
No abstract at ADS
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Title: The Comet of David and Halley's Comet
Authors: Schove, D. Justin
1955JBAA...65..289S Altcode:
No abstract at ADS
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Title: The Sunspot Cycle, 649 B.C. to A.D. 2000
Authors: Schove, D. Justin
1955JGR....60..127S Altcode:
Annual sunspot numbers since 1700 and the known maxima and minima
since 1610 show a similarity of pattern from century to century. This
suggests that the mean cycle is approximately 11-1/9 years. The records
of sunspots and aurorae enable magnitudes and dates of sunspot maxima
since at least A.D. 300 to be estimated. The constancy of the mean
cycle over long periods enables the number of missing maxima to be
calculated, and, using certain general principles, a table of minima
complete since at least 200 B.C. can be established. A 78-year cycle
appears to exist in the length of the sunspot cycle and an irregular
cycle of about 200 to 205 years may exist in auroral intensity. A
characteristic pattern in even centuries enables some predictions to
be made for the next 50 years. Intervals between intense maxima in the
range 200 to 1,000 years apart show clusters at certain values; these
values are close to multiples of 11.11. Intervals between well-dated
maxima since A.D. 300 are often slightly less than such multiples,
for example, 554 instead of 555; from B.C. 200 to A.D. 300, intervals
are slightly greater. In classical and early medieval times the cycle
was thus slightly less. The variability of the sunspot cycle is only
apparent. The fundamental rhythm of 11.1 years (together with the
78-year cycle) is constant through the centuries; temporary aberrations
are partly due to variations in sunspot intensity, inasmuch as active
cycles tend to become "early" and weak cycles "late."
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Title: Sunspot epochs 188 A. D. to 1610 A. D
Authors: Schove, D. Justin
1948PA.....56..247S Altcode:
No abstract at ADS
