Late Pleistocene Continental Climate and Oceanic Variability Recorded in Northwest Pacific Sediments

1991 ◽  
Vol 6 (3) ◽  
pp. 349-370 ◽  
Author(s):  
S. A. Hovan ◽  
D. K. Rea ◽  
N. G. Pisias
Keyword(s):  
Late Pleistocene ◽  
Northwest Pacific ◽  
Continental Climate ◽  
Oceanic Variability

Identification of Density-Stratified Waters in the Late-Pleistocene North Atlantic: A faunal Derivation

1983 ◽  
Vol 20 (3) ◽  
pp. 374-386 ◽  
Author(s):  
Joseph J. Morley
Keyword(s):  
Late Pleistocene ◽  
North Atlantic ◽  
Sea Of Okhotsk ◽  
Species Abundance ◽  
High Abundance ◽  
Northwest Pacific ◽  
The Sea Of Okhotsk ◽  
The North ◽  
The North Atlantic ◽  
Subsurface Temperatures

An expanded study of the radiolarian Cycladophora davisiana in late-Pleistocene North Atlantic marine sediments shows that over the last several hundred thousand years this species exhibits large variations in relative abundance. The C. davisiana curves in the North Atlantic cores are quite similar, with easily recognizable features common to all records. Minor deviations from the general pattern of this species' abundance apparently reflect the response of C. davisiana to specific oceanographic conditions characteristic of a particular area within the North Atlantic. C. davisiana occurs today in high abundance (>20%) only in the Sea of Okhotsk. Extensive winter and early spring sea-ice cover coupled with low surface-water salinities during summer and fall is responsible for maintaining near-freezing subsurface temperatures in this northwest Pacific marginal sea as well as relatively stable temperatures and salinities at depths below a shallow subsurface temperature minimum. During periods in the late Pleistocene, high C. davisiana abundances (>20%) in the North Atlantic were probably associated with oceanographic properties similar to those that exist in the Sea of Okhotsk today. Because of the relationship between relatively stable subsurface temperatures and salinities and high abundance levels of C. davisiana, analysis of this species' abundance pattern at several locations throughout the high-latitude North Atlantic should assist in identifying source areas of deep-water formation and determining the duration of deep convective processes at these sites.

scholarly journals Late Pleistocene-Holocene volcanism on the Kamchatka Peninsula, Northwest Pacific Region

2007 ◽  
pp. 165-198 ◽  
Author(s):  
Vera Ponomareva ◽  
Ivan Melekestsev ◽  
Olga Braitseva ◽  
Tatiana Churikova ◽  
Maria Pevzner ◽  
...  
Keyword(s):  
Late Pleistocene ◽  
Kamchatka Peninsula ◽  
Northwest Pacific ◽  
Pacific Region

Archibald Menzies (1754–1842), an early botanist on the northwestern seaboard of North America, 1792–1794, with further notes on his life and work

2001 ◽  
Vol 28 (1) ◽  
pp. 71-122 ◽  
Author(s):  
ERIC W. GROVES
Keyword(s):  
North America ◽  
Pacific Coast ◽  
Later Life ◽  
Northwest Pacific ◽  
Historical Events ◽  
Short Biography

ABSTRACT: This paper includes a short biography of Menzies and an outline of the historical events on the northwest Pacific coast leading up to Vancouver's voyage. A table listing the botanical visitors to that area prior to 1792 is given followed by a résumé of the evolution of Menzies's journal. Sources used in compiling the chronology of his movements during Vancouver's voyage are then set down, ending the section with an account of Menzies's own visit, 1792–1794. His method of plant collecting is discussed along with an account of his collections and their subsequent disposal. The paper concludes with details of Menzies's later life, his connection with other botanists of the day, and an assessment of his achievements.

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