scholarly journals Revision of Cenozoic magnetostratigraphy and calibration of planktonic microfossil biostratigraphy of Japan against this new time scale.

1999 ◽  
Vol 64 (1) ◽  
pp. 2-15 ◽  
Author(s):  
Tsunemasa Saito
Keyword(s):  
2008 ◽  
Vol 4 (1) ◽  
pp. 47-57 ◽  
Author(s):  
A. Svensson ◽  
K. K. Andersen ◽  
M. Bigler ◽  
H. B. Clausen ◽  
D. Dahl-Jensen ◽  
...  

Abstract. The Greenland Ice Core Chronology 2005 (GICC05) is a time scale based on annual layer counting of high-resolution records from Greenland ice cores. Whereas the Holocene part of the time scale is based on various records from the DYE-3, the GRIP, and the NorthGRIP ice cores, the glacial part is solely based on NorthGRIP records. Here we present an 18 ka extension of the time scale such that GICC05 continuously covers the past 60 ka. The new section of the time scale places the onset of Greenland Interstadial 12 (GI-12) at 46.9±1.0 ka b2k (before year AD 2000), the North Atlantic Ash Zone II layer in GI-15 at 55.4±1.2 ka b2k, and the onset of GI-17 at 59.4±1.3 ka b2k. The error estimates are derived from the accumulated number of uncertain annual layers. In the 40–60 ka interval, the new time scale has a discrepancy with the Meese-Sowers GISP2 time scale of up to 2.4 ka. Assuming that the Greenland climatic events are synchronous with those seen in the Chinese Hulu Cave speleothem record, GICC05 compares well to the time scale of that record with absolute age differences of less than 800 years throughout the 60 ka period. The new time scale is generally in close agreement with other independently dated records and reference horizons, such as the Laschamp geomagnetic excursion, the French Villars Cave and the Austrian Kleegruben Cave speleothem records, suggesting high accuracy of both event durations and absolute age estimates.


2009 ◽  
Vol 126 (3) ◽  
pp. 1015-1025 ◽  
Author(s):  
M. Azarpeyvand ◽  
R. H. Self
Keyword(s):  

Science ◽  
1949 ◽  
Vol 109 (2836) ◽  
pp. 466-467
Author(s):  
F. Franz
Keyword(s):  

Science ◽  
1976 ◽  
Vol 194 (4272) ◽  
pp. 1381-1387 ◽  
Author(s):  
G. Neukum ◽  
D. U. Wise
Keyword(s):  

2008 ◽  
Vol 9 (1) ◽  
pp. 338 ◽  
Author(s):  
Junwon Choi ◽  
Kyung-won Yang ◽  
Tai-yong Lee ◽  
Sang Lee

Metrologia ◽  
1991 ◽  
Vol 28 (2) ◽  
pp. 65-74 ◽  
Author(s):  
M Weiss ◽  
T Weissert
Keyword(s):  

1972 ◽  
Vol 54 (3) ◽  
pp. 417-421 ◽  
Author(s):  
Takeo Sakurai ◽  
Takuya Matsuda

The existence of a new time scale t = σ-¼(L2/kN)½, where σ, k, L and N are the Prandtl number, the thermometric conductivity, a typical length and the Brunt-Väisälä frequency, respectively, is clarified for a temperature adjustment process of a Boussinesq fluid in a circular cylinder.


1961 ◽  
Vol 22 (4) ◽  
pp. 377-385 ◽  
Author(s):  
G. W. G. SHARP ◽  
S. A. SLORACH ◽  
H. J. VIPOND

SUMMARY 1. An investigation of the diurnal rhythms of keto- and ketogenic steroid excretion has been carried out in four human subjects. The subjects lived, under standardized conditions of diet, activity and lighting, in Spitsbergen where 24 hr. daylight persists during the summer. 2. A study of the adaptation of their rhythms to a reversed activity-sleep and light-darkness schedule has been made, and of the subsequent re-adaptation to normal schedules. 3. Adaptation of the ketosteroid rhythm occurred in 2 days and of the ketogenic steroid rhythm in 8 days. 4. The ketosteroid excretory rhythm may depend immediately, and the ketogenic steroid rhythm ultimately, upon habit and environment. 5. Evidence has been presented to suggest that the ketogenic steroid rhythm is dependent upon the synchronization of pituitary and adrenal responsiveness. During the reversal of rhythm, adrenocortical activity takes place initially in the early 'evening' and 'night', occurring progressively earlier each day until it synchronizes with the new time scale. 6. The significance of these findings is discussed.


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