Globular clusters and galactic evolution (invited review)     

Sidney van den Bergh 《Astrophysics and Space Science》1986,118(1-2):435-438

Observations of the frequency with which globular clusters surround galaxies are reviewed. With a single exception the data do not favour the view that elliptical galaxies are formed from merging disc systems. Attention is also drawn to the unusually high frequency of globular clusters in central galaxies of rich clusters.  相似文献   

The conference on supply and demand of water transport, organized by the Stockholm school of economics on the occasion of the retirement of Professor Thomas Thorburn : Stockholm, Sweden, 18–19 June 1979     

Sidney Gilman 《Marine Policy》1979,3(4):322-324

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Whale mining,whale saving     

Sidney Holt 《Marine Policy》1985,9(3):192-213

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Oscillating glacial northern and southern deep water formation from combined neodymium and carbon isotopes     

Alexander M. Piotrowski  Steven L. Goldstein  Sidney  R. Hemming  Richard G. Fairbanks  David R. Zylberberg 《Earth and Planetary Science Letters》2008,272(1-2):394-405

While ocean circulation is driven by the formation of deep water in the North Atlantic and the Circum-Antarctic, the role of southern-sourced deep water formation in climate change is poorly understood. Here we address the balance of northern- and southern-sourced waters in the South Atlantic through the last glacial period using neodymium isotope ratios of authigenic ferromanganese oxides in thirteen deep sea cores from throughout the South Atlantic. The data indicate that northern-sourced water did not reach the Southern Ocean during the late glacial, and was replaced by southern-derived intermediate and deep waters. The high-resolution neodymium isotope record (~ 300 yr sample spacing) from two spliced deep Cape Basin sites indicates that over the last glacial period northern-sourced water mass export to the Southern Ocean was stronger during the major Greenland millennial warming intervals (and Southern Hemisphere cool periods), and particularly during the major interstadials 8, 12, and 14. Northern-sourced water mass export was weaker during Greenland stadials and reached minima during Heinrich Events. The benthic foraminiferal carbon isotopes in the same Cape Basin core reflect a partial control by Southern Hemisphere climate changes and indicate that deep water formation and ventilation occurred in the Southern Ocean during major Greenland cooling intervals (stadials). Together, neodymium isotopes and benthic carbon isotopes provide new information about water mass sourcing and circulation in deep Southern Ocean waters during rapid glacial climate changes. Combining carbon and neodymium isotopes can be used to monitor the relative proportion of northern- and southern-sourced waters in the Cape Basin to gain insight into the processes which control the carbon isotopic composition of deep waters. In this study we show that deep water formation and circulation was more important than biological productivity and nutrient regeneration changes for controlling the carbon isotope chemistry of Antarctic Bottom Water during millennial-scale glacial climate cycles. This observation also lends support to the hypothesis that ocean circulation is linked to interhemispheric climate changes on short timescales, and that ventilation in the glacial ocean rapidly switched between the northern and Southern Hemisphere on millennial timescales.  相似文献   

Propaganda and pretext     

Holt S 《Marine pollution bulletin》2006,52(4):363-366

This Viewpoint describes and analyses the history and current features of the strategy of the Government of Japan, and the associated Institute for Cetacean Research in Tokyo, to regain control of the International Whaling Commission (IWC), to legitimise renewed unsustainable commercial whaling and to dismantle conservation measures taken by the IWC over the past three decades. A key element in that strategy now is to promote and nourish the false idea that the present crisis in world fisheries is significantly caused by the consumption of valuable fish by increasing whale populations.  相似文献   

Viruses and Bacteria in Karst and Fractured Rock Aquifers in East Tennessee,USA   总被引：2，自引：0，他引：2  

Trisha B. Johnson  Larry D. McKay  Alice C. Layton  Sidney W. Jones  Greg C. Johnson  Jennifer L. Cashdollar  Daniel R. Dahling  Leah F. Villegas  G. Shay Fout  Daniel E. Williams  Gary Sayler 《Ground water》2011,49(1):98-110

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The Geology of the Bristol district     

Sidney H. Reynolds 《Proceedings of the Geologists' Association. Geologists' Association》1929,40(1):77-103

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Is the IWC finished as an instrument for the conservation of whales and the regulation of whaling?     

Holt S 《Marine pollution bulletin》2003,46(7):924-926

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Pleistocene glaciation of volcano Ajusco,central Mexico,and comparison with the standard Mexican glacial sequence     

Sidney E. White  Salvatore Valastro 《Quaternary Research》1984,21(1):21-35

Three Pleistocene glaciations and two Holocene Neoglacial advances occurred on volcano Ajusco in central Mexico. Lateral moraines of the oldest glaciation, the Marqués, above 3250 m are made of light-gray indurated till and are extensively modified by erosion. Below 3200 m the till is dark red, decomposed, and buried beneath volcanic colluvium and tephra. Very strongly to strongly developed soil profiles (Inceptisols) have formed in the Marqués till and in overlying colluvia and tephra. Large sharp-crested moraines of the second glaciation, the Santo Tomás, above 3300 m are composed of pale-brown firm till and are somewhat eroded by gullies. Below 3250 m the till is light reddish brown, cemented, and weathered. Less-strongly developed soil profiles (Inceptisols) have formed in the Santo Tomás till and in overlying colluvia and tephra. Narrow-crested moraines of yellowish-brown loose till of the third glaciation, the Albergue, are uneroded. Weakly developed soil profiles (Inceptisols) in the Albergue till have black ash in the upper horizon. Two small Neoglacial moraines of yellowish-brown bouldery till on the cirque floor of the largest valley support weakly developed soil profiles with only A and Cox horizons and no ash in the upper soil horizons. Radiocarbon dating of organic matter of the B horizons developed in tills, volcanic ash, and colluvial volcanic sand includes ages for both the soil-organic residue and the humic-acid fraction, with differences from 140 to 660 yr. The dating provides minimum ages of about 27,000 yr for the Marqués glaciation and about 25,000 yr for the Santo Tomás glaciation. Dates for the overlying tephra indicate a complex volcanic history for at least another 15,000 yr. Comparison of the Ajusco glacial sequence with that on Iztaccíhuatl to the east suggests that the Marqués and Santo Tomás glaciations may be equivalent to the Diamantes glaciation First and Second advances, the Albergue to the Alcalican glaciations, and the Neoglacial to the Ayolotepito advances.  相似文献   

Kyoto meeting of the IWC     

Sidney Holt  Scientific Adviser 《Marine pollution bulletin》1993,26(12):660-661

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