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Journal ArticleDOI

Persistent Solar Influence on North Atlantic Climate During the Holocene

TLDR
A solar forcing mechanism therefore may underlie at least the Holocene segment of the North Atlantic's “1500-year” cycle, potentially providing an additional mechanism for amplifying the solar signals and transmitting them globally.
Abstract
Surface winds and surface ocean hydrography in the subpolar North Atlantic appear to have been influenced by variations in solar output through the entire Holocene. The evidence comes from a close correlation between inferred changes in production rates of the cosmogenic nuclides carbon-14 and beryllium-10 and centennial to millennial time scale changes in proxies of drift ice measured in deep-sea sediment cores. A solar forcing mechanism therefore may underlie at least the Holocene segment of the North Atlantic's "1500-year" cycle. The surface hydrographic changes may have affected production of North Atlantic Deep Water, potentially providing an additional mechanism for amplifying the solar signals and transmitting them globally.

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Journal ArticleDOI

The holocene Asian monsoon : links to solar changes and North Atlantic climate

TL;DR: A 5-year-resolution absolute-dated oxygen isotope record from Dongge Cave, southern China, provides a continuous history of the Asian monsoon over the past 9000 years, and shows that some, but not all, of the monsoon variability at these frequencies results from changes in solar output.
Journal ArticleDOI

Global temperature change.

TL;DR: Comparison of measured sea surface temperatures in the Western Pacific with paleoclimate data suggests that this critical ocean region is approximately as warm now as at the Holocene maximum and within ≈1°C of the maximum temperature of the past million years.
Journal ArticleDOI

Mid- to Late Holocene climate change: an overview

TL;DR: The authors used selected proxy-based reconstructions of different climate variables, together with state-of-the-art time series of natural forcings (orbital variations, solar activity variations, large tropical volcanic eruptions, land cover and greenhouse gases), underpinned by results from GCMs and Earth System Models of Intermediate Complexity (EMICs), to establish a comprehensive explanatory framework for climate changes from the mid-Holocene (MH) to pre-industrial time.
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A high-resolution, absolute-dated Holocene and deglacial Asian monsoon record from Dongge Cave, China

TL;DR: In this paper, the authors present a continuous record of the Asian monsoon over the last 16 ka from δ18O measurements of stalagmite calcite, which is combined with a chronology from 45 precise 230Th dates.
References
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Journal ArticleDOI

Uptake of excess CO2 by an outcrop-diffusion model of the ocean

TL;DR: In this article, a carbon cycle model is presented in which direct ventilation of intermediate and deep ocean waters in high latitudes is taken into account, and two calibration methods are compared, using the distribution either of natural or of bomb-produced 14C.
Journal ArticleDOI

Global ice-volume fluctuations, North Atlantic ice-rafting events, and deep-ocean circulation changes between 130 and 70 ka

TL;DR: In this paper, multiproxy data from North Atlantic deep-sea sediment core NEAP18K provide a detailed record of climate through oxygen isotope stage (OIS) 5.
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A Possible 20th-Century Slowdown of Southern Ocean Deep Water Formation

TL;DR: Physical oceanographic and geochemical studies in the Southern Ocean suggest that no more than 5 x 10(6) cubic meters per second of ventilated deep water is currently being produced, which conflicts with conclusions based on the distributions of the carbon-14/carbon ratio and a quasi-conservative property in the deep sea.
Journal ArticleDOI

How long and how stable was the last interglacial

TL;DR: In this article, the Melisey I silty layer, which marks the end of the Last Interglacial biozone in La Grande Pile pollen record, appears coeval with the polar front advance C24 registered in the core V29-191 by a sharply increased presence of ice-rafted detritus and the cold water foraminifer Neogloboquadrina pachyderma sinistral.
Journal ArticleDOI

Variations in radiocarbon concentration and sunspot activity

TL;DR: In this paper, a comparison is made between variations in sunspot activity and fluctuations in C/sup 14/ concentration during the past 13 centuries, and the evidence given suggests some correspondence between sunspot activities and Csup 14 / concentration in the atmosphere.
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