ライフサイエンスコーパス: obliquity

1 ice content at low latitudes independent of obliquity.

2 exo-planets/moons with high eccentricity or obliquity.

3 on the relative phasing of precession versus obliquity.

4 to reach Earth's climatically favourable low obliquity.

5 a combination of high eccentricity and high obliquity.

6 kyr and was related to variations in Earth's obliquity.

7 s, matching the period of changes in Earth's obliquity.

8 owfall during periods of increased spin-axis obliquity.

9 bital plane of its planets, known as stellar obliquity.

10 coplanar planets have been seen to have low obliquities.

11 are obtained noninvasively in a multitude of obliquities.

12 delta18O or sea level, leaving the in-phase obliquity (41,000 years) component of insolation to domi

13 he Late Oligocene, with a weak expression of obliquity (41-ka) and precession (19-ka and 23-ka) cycle

14 A transition from low-amplitude sinusoidal obliquity (~41 ky) and precession (~23 ky) driven glacia

15 bonate content carries the "polar" signal of obliquity [41,000 years (41 kyr)] forcing.

16 which consists of low-amplitude variance in obliquity (a node) and a minimum in eccentricity, result

17 Before then (increasing), obliquity alone was sufficient to end a glacial cycle, b

18 multiple proxies confirm the presence of the obliquity amplitude modulation (AM) cycle during the Mes

19 A subsequent decrease in obliquity amplitude resulted in the emergence of an 'int

20 inclinations are consistent with low orbital obliquity and a geocentric-axial-dipole magnetic field f

21 distance, length of day, and the periods of obliquity and climatic precession cycles.

22 mproved determination of the past periods of obliquity and climatic precession for astrochronology ap

23 ution with the unexpected alignments of spin obliquity and correlations with spin rates presents a ne

24 Earth's obliquity and eccentricity cycles are strongly imprinted

25 ng the Icehouse (3.3 Ma to present) state at obliquity and eccentricity timescales, and during the Wa

26 2:1 resonance between modulation of orbital obliquity and eccentricity variations more than 200 Mya

27 nds with a rare orbital congruence involving obliquity and eccentricity.

28 f the Amazonian, suggesting generally higher obliquity and insolation conditions at the poles than at

29 The latter excursion is paced by obliquity and is therein similar to Mesozoic intervals o

30 ture extremes that result from Charon's high obliquity and long seasons in the production of this mat

31 summer insolation is primarily controlled by obliquity and not precession because, by Kepler's second

32 tate when its spin axis both tilts to a high obliquity and precesses to align the Northern Hemisphere

33 Here I show that both obliquity and precession pace late Pleistocene glacial c

34 nsoon is sensitive to orbital forcing at the obliquity and precession periods (41,000 and 23,000 year

35 The origin of Saturn's ~26.7 degrees obliquity and ~100-million-year-old rings is unknown.

36 dentifying the specific roles of precession, obliquity, and eccentricity in glacial-interglacial tran

37 function of eccentricity, spin-orbit ratio, obliquity, and nodal longitude, and we visualize the mot

38 of Milankovitch cycles (climatic precession, obliquity, and orbital eccentricity), whose relative rat

39 Eccentricity, obliquity, and precession are cyclic parameters of the E

40 ide changes at Earth's orbital eccentricity, obliquity, and precession bands and are closely tied to

41 ions paced by a combination of eccentricity, obliquity, and precession, and confirm that major Asian

42 s inspired models that depend on the Earth's obliquity (approximately 40,000 yr; approximately 40 kyr

43 n in the Kepler-30 system suggests that high obliquities are confined to systems that experienced dis

44 d previously unconsidered tidal force due to obliquity (axial tilt of the moon with respect to its or

45 temperature gradient as affected by Earth's obliquity (axial tilt)-can explain the lag of atmospheri

46 ed with greater mid-depth overturning in the obliquity band but less overturning in the precession ba

47 cession and approximately 124 degrees in the obliquity bands relative to the phase of maximum global

48 ty exhibits power in both the precession and obliquity bands, and is nearly in anti-phase with summer

49 annot determine the inclination and magnetic obliquity because of the unknown period or duty cycle of

50 ent a comprehensive assessment of primordial obliquities between the spin axes of young, isolated Sun

51 This led to the amplification of obliquity (but not precession) cycles in equatorial sea

52 rmination starting at the same high phase of obliquity, but at opposing phases of precession.

53 ness feedback could have reduced the Earth's obliquity by tens of degrees in less than 100 Myr if the

54 rs in diameter, potentially modified Earth's obliquity by ~10 degrees , whereas those for the Moon, a

55 that glacial terminations are independent of obliquity can be rejected at the 5% significance level,

56 veloping scoliosis and its associated pelvic obliquity can even compromise sitting.

57 anges in southern Siberia as being driven by obliquity change.

58 However, the tilt of Mars' rotation axis (obliquity) changed considerably in the past several mill

59 on was influenced by combined precession and obliquity changes.

60 ice sheets terminated every second or third obliquity cycle at times of high obliquity, similar to t

61 ng is consistent with the periodicity of the obliquity cycle.

62 ses over 100-kyr eccentricity cycles, 41-kyr obliquity cycles and 23-kyr precession cycles.

63 years exhibit dominant precession and weaker obliquity cycles and follow changes in meridional insola

64 erature records display much more pronounced obliquity cycles at a period of about 41 kyr.

65 hat both records are dominated by the 41-kyr obliquity cycles between 1.8 and 1.2 Myr ago, with a rel

66 ear eccentricity cycles and 1.2-million-year obliquity cycles in periodically recurring glacial and c

67 anged from 41 kyr, the period of the Earth's obliquity cycles, to 100 kyr, the period of the Earth's

68 lled 100,000-year world are separated by two obliquity cycles, with each termination starting at the

69 , along with ice-albedo feedbacks, amplified obliquity cycles.

70 This "obliquity disruption" explains cryosphere variability be

71 this would require a mechanism to bring the obliquity down to its present value of 23.5 degrees.

72 ds occur near flow discontinuities caused by obliquity-driven hiatuses in ice accumulation, forming i

73 rbit around an initially fast-spinning, high-obliquity Earth, which is a probable outcome of giant im

74 panning the past million years suggests that obliquity exerted a persistent influence on not only the

75 We used asteroseismology to measure a large obliquity for Kepler-56, a red giant star hosting two tr

76 A high obliquity for the early Earth may also provide a natural

77 oxy data, and we argue that high variance in obliquity forcing (mediated and enhanced by the ocean an

78 Ma) to modulation of 41-thousand-year (kyr) obliquity forcing by an increase in ~100-kyr CO(2) varia

79 The obliquity forcing could be primarily delivered by a cros

80 Our finding suggests that the obliquity forcing may play a more important role in glob

81 cene glacial terminations purely in terms of obliquity forcing.

82 titude processes that were driven by orbital obliquity forcing.

83 ce volume changes at a dominant 41,000-year (obliquity) frequency throughout this time.

84 High obliquity further amplifies summer precipitation through

85 obal ice volume were dominated by changes in obliquity; however, the role of precession remains unres

86 This suggests that some obliquities identified in planetary systems at older age

87 ich persistent change in transport capacity, obliquity in slip, or advected topography results in reo

88 but was more abundant during periods of high obliquity in the last few millions of years.

89 sorbance up to ~ 70% even with the incidence obliquity in the range of 0 degrees -60 degrees for tran

90 This obliquity-induced lag, in turn, makes carbon dioxide a d

91 recession parameter starts decreasing) while obliquity is increasing.

92 s more influence on deglacial onset, whereas obliquity is more important for the attainment of peak i

93 Our results unambiguously demonstrate that obliquity is the main driver of the differences in surfa

94 ccentricity modulation, and amplification of obliquity, is nearly coincident with a 2% decrease in se

95 reated during the last phase of high orbital obliquity less than 100,000 years ago, and is now being

96 ost layers post-date the latest downtrend in obliquity <20,000 years ago.

97 61 ka, 52.5-50.5 ka and 37.5-33 ka that lead obliquity maxima and precession minima.

98 brupt forestation events are consistent with obliquity maxima, so that we interpret last glacial vege

99 Episodic excursions to high obliquities may also have raised temperatures over some

100 Williams has suggested that the Earth's obliquity may have been greater than 54 degrees during m

101 precession maximum by ~3 ka, suggesting that obliquity may have played a considerable role in the Alp

102 bundle (n=1; 1.0%), as well as imaging plane obliquity (n=7; 12.5%).

103 Here we propose that obliquity-oblateness feedback could have reduced the Ear

104 be ruled out as the explanation for the high obliquities of hot Jupiters, and dynamical interactions

105 hat the planet occupies a Cassini state with obliquity of 2.11 +/- 0.1 arc minutes.

106 The impact of obliquity of the incident beam was studied as well and i

107 elaborated into hypotheses that precession, obliquity or combinations of both could pace deglaciatio

108 d by 'snowball Earth' episodes, high orbital obliquity or markedly non-uniformitarian geomagnetic fie

109 ximately million-year periodicities in Mars' obliquity or orbital eccentricity.

110 question that has emerged is whether stellar obliquity originates primarily from gravitational intera

111 e dark layers and formed mainly during lower obliquity over the past 4-5 Myr.

112 nce in response to climate forcing driven by obliquity-paced changes to ice mass balance.

113 rs are among the most sensitive recorders of obliquity-paced climate variability in interior Antarcti

114 The model accounts for the dominance of obliquity-paced glacial-interglacial cycles early in the

115 220 ka, at least, the changes are related to obliquity-paced solar radiation, manifest as variations

116 Earlier tests have shown that obliquity paces the late Pleistocene glacial cycles but

117 oronal imbalance, vertebral rotation, pelvic obliquity, pelvic torsion, and pelvic rotation using a v

118 curred at Earth-like frequencies during high-obliquity periods in the last million years on Mars.

119 ving ice from past periods when high orbital obliquity permitted nonpolar ice accumulation.

120 the 2.4 Myr eccentricity cycle, during which obliquity prevails over precession, and highlights the d

121 reas and cervical temperature with shoulders obliquity (r = 0.58).

122 (ka) in both TOC and d(13)C(org) The ~173-ka obliquity-related forcing signal was amplified by intern

123 For zero obliquity, reversals occur when a planet's spin angular

124 ent with a terrestrial ice sheet and a clear obliquity signal at the margins of a marine ice sheet.

125 s remarkably consistent globally whereas the obliquity signal is inconsistent between sites, indicati

126 rbon cycling through the period and a strong obliquity signal.

127 This obliquity signature implies coincidence with a minimum o

128 nd or third obliquity cycle at times of high obliquity, similar to the original proposal by Milankovi

129 y of water ice and dust during variations in obliquity (the angle between Mars' pole of rotation and

130 eleased into the atmosphere at times of high obliquity, the CO(2) reservoir would increase the atmosp

131 satellite, Titan, could have raised Saturn's obliquity through a spin-orbit precession resonance with

132 orbital variability, although variability on obliquity timescales is driven through the ice sheets.

133 hich we name Chrysalis, that caused Saturn's obliquity to increase through the Neptune resonance.

134 ions were dictated by changes in the Earth's obliquity) to the more recent 100-kyr cycles of ice ages

135 ord by reorganization of the vegetation from obliquity- to eccentricity-paced cycles.

136 ithin the Upper Kellwasser event is paced by obliquity, under a low-eccentricity orbit.

137 we show that tidal dissipation due to lunar obliquity was an important effect during the Moon's tida

138 Sagittal imbalance and pelvic obliquity were identified as key predictors of symptom s

139 f Mars during periods of increased spin-axis obliquity when polar ice was mobilized and redeposited i

140 istently occurred during times of decreasing obliquity whereas mass ice wasting (ablation) events wer

141 hot Jupiters are often observed to have high obliquities, whereas stars with multiple coplanar planet

142 oles to mid-latitudes during periods of high obliquity within the past 10(5) to 10(6) years.