Variability and seasonality of North Atlantic climate during the early Holocene: evidence from Faroe Island lake sediments

The Holocene ◽  
2008 ◽  
Vol 18 (6) ◽  
pp. 851-860 ◽  
Author(s):  
Catherine A. Jessen ◽  
Mats Rundgren ◽  
Svante Björck ◽  
Camilla S. Andresen ◽  
Daniel J. Conley
Keyword(s):  
Lake Sediments ◽  
North Atlantic ◽  
Early Holocene ◽  
Faroe Island ◽  
North Atlantic Climate

North Atlantic climate II Addendum

2005 ◽  
Author(s):  
T. Kanamatsu ◽  
R. Stein ◽  
C.A. and Alvarez Zarikian
Keyword(s):  
North Atlantic ◽  
North Atlantic Climate

RECONSTRUCTING EARLY HOLOCENE DECADAL-RESOLUTION TEMPERATURE USING BRGDGTS FROM LAKE SEDIMENTS, WESTERN GREENLAND

2016 ◽  
Author(s):  
Kevin Q. Nguyen ◽  
◽  
Elizabeth K. Thomas ◽  
Isla S. Castañeda ◽  
Jason P. Briner ◽  
...  
Keyword(s):  
Lake Sediments ◽  
Early Holocene

scholarly journals Glacial fluctuations of the Indian monsoon and their relationship with North Atlantic climate: new data and modelling experiments

2013 ◽  
Vol 9 (5) ◽  
pp. 2135-2151 ◽  
Author(s):  
C. Marzin ◽  
N. Kallel ◽  
M. Kageyama ◽  
J.-C. Duplessy ◽  
P. Braconnot
Keyword(s):  
North Atlantic ◽  
Bay Of Bengal ◽  
Indian Monsoon ◽  
Hydrological Cycle ◽  
Atlantic Meridional Overturning Circulation ◽  
Meridional Overturning Circulation ◽  
The North ◽  
North Atlantic Climate ◽  
Meridional Overturning ◽  
The North Atlantic

Abstract. Several paleoclimate records such as from Chinese loess, speleothems or upwelling indicators in marine sediments present large variations of the Asian monsoon system during the last glaciation. Here, we present a new record from the northern Andaman Sea (core MD77-176) which shows the variations of the hydrological cycle of the Bay of Bengal. The high-resolution record of surface water δ18O dominantly reflects salinity changes and displays large millennial-scale oscillations over the period 40 000 to 11 000 yr BP. Their timing and sequence suggests that events of high (resp. low) salinity in the Bay of Bengal, i.e. weak (resp. strong) Indian monsoon, correspond to cold (resp. warm) events in the North Atlantic and Arctic, as documented by the Greenland ice core record. We use the IPSL_CM4 Atmosphere-Ocean coupled General Circulation Model to study the processes that could explain the teleconnection between the Indian monsoon and the North Atlantic climate. We first analyse a numerical experiment in which such a rapid event in the North Atlantic is obtained under glacial conditions by increasing the freshwater flux in the North Atlantic, which results in a reduction of the intensity of the Atlantic meridional overturning circulation. This freshwater hosing results in a weakening of the Indian monsoon rainfall and circulation. The changes in the continental runoff and local hydrological cycle are responsible for an increase in salinity in the Bay of Bengal. This therefore compares favourably with the new sea water δ18O record presented here and the hypothesis of synchronous cold North Atlantic and weak Indian monsoon events. Additional sensitivity experiments are produced with the LMDZ atmospheric model to analyse the teleconnection mechanisms between the North Atlantic and the Indian monsoon. The changes over the tropical Atlantic are shown to be essential in triggering perturbations of the subtropical jet over Africa and Eurasia, that in turn affect the intensity of the Indian monsoon. These relationships are also found to be valid in additional coupled model simulations in which the Atlantic meridional overturning circulation (AMOC) is forced to resume.

scholarly journals North Atlantic climate and northwestern Mediterranean plankton variability

2005 ◽  
Vol 50 (4) ◽  
pp. 1213-1220 ◽  
Author(s):  
Juan Carlos Molinero ◽  
Frédéric Ibanez ◽  
Paul Nival ◽  
Emmanuelle Buecher ◽  
Sami Souissi
Keyword(s):  
North Atlantic ◽  
North Atlantic Climate ◽  
Northwestern Mediterranean

scholarly journals Millennial variations of atmospheric CO<sub>2</sub> during the early Holocene (11.7–7.4 ka)

2021 ◽  
Author(s):  
Jinhwa Shin ◽  
Jinho Ahn ◽  
Jai Chowdhry Beeman ◽  
Hun-Gyu Lee ◽  
Edward J. Brook
Keyword(s):  
North Atlantic ◽  
Ice Core ◽  
Polar Front ◽  
Equatorial Pacific ◽  
Early Holocene ◽  
Atmospheric Co2 ◽  
Solar Forcing ◽  
Local Climate ◽  
Climate Conditions ◽  
Siple Dome

Abstract. We present a new high-resolution record of atmospheric CO2 from the Siple Dome ice core, Antarctica over the early Holocene (11.7–7.4 ka) that quantifies natural CO2 variability on millennial timescales under interglacial climate conditions. Atmospheric CO2 decreased by ~10 ppm between 11.3 and 7.3 ka. The decrease was punctuated by local minima at 11.1, 10.1, 9.1 and 8.3 ka with amplitude of 2–6 ppm. These variations correlate with proxies for solar forcing and local climate in the South East Atlantic polar front, East Equatorial Pacific and North Atlantic. These relationships suggest that weak solar forcing changes might have impacted CO2 by changing CO2 outgassing from the Southern Ocean and the East Equatorial Pacific and terrestrial carbon storage in the Northern Hemisphere over the early Holocene.

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