Impact of shallow-living radiolarian flux variations on North Atlantic Cycladophora davisiana percentages

Autor: Joseph J. Morley, James D. Hays

Publikováno v: Marine Micropaleontology. 110:42-49

The cause of high Cycladophora davisiana percentages, a deep-living (maximum abundance > 200 m) radiolarian species, in high-latitude (> 45°) late Pleistocene deep-sea sediments has been much debated. In this paper we show that in four subpolar Nort

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::87b89a4c59b270c17b1f5911446bc121
https://doi.org/10.1016/j.marmicro.2013.06.006

The Sea of Okhotsk: A Window on the Ice Age Ocean

Autor: Joseph J. Morley, James D. Hays

Publikováno v: Deep Sea Research Part I: Oceanographic Research Papers. 51:593-618

The modern Sea of Okhotsk and the high-latitude glacial ocean share similar radiolarian faunas suggesting they also share environmental similarities. This sea favors deep- (>200 m) over shallow-living species as evidenced by collections of sediment t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4ab9546caec74f79c3dc72a886b0ab30
https://doi.org/10.1016/j.dsr.2004.02.001

Silicon isotopes indicate enhanced carbon export efficiency in the North Atlantic during deglaciation

Autor: Jerry F. McManus, James D. Hays, Laura F. Robinson, Katharine R. Hendry

Publikováno v: Hendry, K, Robinson, L F, McManus, J & Hays, J 2014, ' Silicon isotopes indicate enhanced carbon export efficiency in the North Atlantic during deglaciation ', Nature Communications, vol. 5, 3107 . https://doi.org/10.1038/ncomms4107

Today’s Sargasso Sea is nutrient starved, except for episodic upwelling events caused by wind-driven winter mixing and eddies. Enhanced diatom opal burial in Sargasso Sea sediments indicates that silicic acid, a limiting nutrient today, may have be

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d7669028764c787583bc1b1bbd7352e7
https://pubmed.ncbi.nlm.nih.gov/24452197

Late Pleistocene oxygen isotope records of biogenic silica from the Atlantic sector of the Southern Ocean

Autor: Aldo Shemesh, Lloyd H. Burckle, James D. Hays

Publikováno v: Paleoceanography. 10:179-196

We determined the isotopic composition of oxygen in marine diatoms in eight deep-sea cores recovered from the Atlantic sector of the Southern Ocean. The analytical reproducibility and core-to-core consistency of the isotopic signal suggests that diat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f2210951b26a2281111742bae3158503
https://doi.org/10.1029/94pa03060

Evidence for lower productivity in the Antarctic Ocean during the last glaciation

Autor: Lloyd H. Burckle, Christopher D. Charles, James D. Hays, J. Saltzman, Richard A. Mortlock, Philip N. Froelich, Michael A Zibello

Publikováno v: Nature. 351:220-223

BOTH increased biological productivity and more efficient uptake of upwelled nutrients in high-latitude oceans have been proposed1–5 as mechanisms responsible for the glacial reduction in atmospheric concentrations of carbon dioxide deduced from ic

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6b3b4c86a39c92ea45d55860dccc24c5
https://doi.org/10.1038/351220a0