J. Backman

Publications331
h-index54
Citations12,736
Highly Influential Citations1,160
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Rapid stepwise onset of Antarctic glaciation and deeper calcite compensation in the Pacific Ocean
TLDR
The changes in oxygen-isotope composition across the Eocene/Oligocene boundary are too large to be explained by Antarctic ice-sheet growth alone and must therefore also indicate contemporaneous global cooling and/or Northern Hemisphere glaciation.
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A review of calcareous nannofossil astrobiochronology encompassing the past 25 million years
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Oxygen isotope calibration of the onset of ice-rafting and history of glaciation in the North Atlantic region
We report here that DSDP Site 552A, cored with the hydraulic piston corer on the west flank of Rockall Bank, recovered an undisturbed sequence of alternating white deep-sea carbonate oozes and…
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Pleistocene evolution: Northern hemisphere ice sheets and North Atlantic Ocean
We analyze five high-resolution time series spanning the last 1.65 m.y.: benthic foraminiferal δ18O and δ13O, percent CaCO3, and estimated sea surface temperature (SST) at North Atlantic Deep Sea…
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Subtropical Arctic Ocean temperatures during the Palaeocene/Eocene thermal maximum
TLDR
It is shown that sea surface temperatures near the North Pole increased from ∼18 °C to over 23‬°C during this event, which suggests that higher-than-modern greenhouse gas concentrations must have operated in conjunction with other feedback mechanisms—perhaps polar stratospheric clouds or hurricane-induced ocean mixing—to amplify early Palaeogene polar temperatures.
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Biozonation and biochronology of Paleogene calcareous nannofossils from low and middle latitudes
Calcareous nannofossils have provided a powerful biostratigraphic tool since the 1950's and 1960's, when several milestone papers began to highlight their potential use in dating Cenozoic sediments…
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Biozonation and biochronology of Miocene through Pleistocene calcareous nannofossils from low and middle latitudes
Calcareous nannofossils are widely used in Cenozoic marine biostratigraphy. At present, the two most widely used calcareous nannofossil biozonations were established approximately 40 years ago. These…
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Late Pliocene variation in northern hemisphere ice sheets and North Atlantic deep water circulation
High-resolution records of δ18O, δ13O, and percent CaCO3 from the late Pliocene North Atlantic (Deep Sea Drilling Project sites 607 and 609) are presented and oxygen isotope stages are formalized…
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Eocene bipolar glaciation associated with global carbon cycle changes
The transition from the extreme global warmth of the early Eocene ‘greenhouse’ climate ∼55 million years ago to the present glaciated state is one of the most prominent changes in Earth's climatic…
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Arctic hydrology during global warming at the Palaeocene/Eocene thermal maximum
TLDR
This corrects the article to show that the method used to derive the H2O2 “spatially aggregating force” is based on a two-step process, not a single step, like in the previous version of this paper.
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