Bipolar Changes in Atmospheric Circulation During the Little Ice Age

  title={Bipolar Changes in Atmospheric Circulation During the Little Ice Age},
  author={Karl J. Kreutz and Paul Andrew Mayewski and L. David Meeker and Mark S. Twickler and Sallie I. Whitlow and Iqbal I. Pittalwala},
Annually dated ice cores from Siple Dome, West Antarctica, and central Greenland indicate that meridional atmospheric circulation intensity increased in the polar South Pacific and North Atlantic at the beginning (∼1400 A.D.) of the most recent Holocene rapid climate change event, the Little Ice Age (LIA). As deduced from chemical concentrations at these core sites, the LIA was characterized by substantial meridional circulation strength variability, and this variability persists today despite… 

Surface changes in the North Atlantic meridional overturning circulation during the last millennium

Water mass tracer data presented here from the North Icelandic shelf, combined with previously published data from the Arctic and subtropical Atlantic, show that surface Atlantic meridional overturning circulation dynamics likely amplified the relatively warm conditions during the Medieval Climate Anomaly and the relatively cool conditions within the Little Ice Age within the North Atlantic sector.

Climate and hydrographic variability in the Indo‐Pacific Warm Pool during the last millennium

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Abstract We present highly resolved, annually dated, calibrated proxies for atmospheric circulation from several Antarctic ice cores (ITASE (International Trans-Antarctic Scientific Expedition),

Little Ice Age climate and oceanic conditions of the Ross Sea, Antarctica from a coastal ice core record

Increasing paleoclimatic evidence suggests that the Little Ice Age (LIA) was a global climate change event. Understanding the forcings and associated climate system feedbacks of the LIA is made

Surface changes in the eastern Labrador Sea around the onset of the Little Ice Age

Despite the relative climate stability of the present interglacial, it has been punctuated by several centennial time scale climatic oscillations, the latest of which are often colloquially referred

340 years of atmospheric circulation characteristics reconstructed from an eastern Antarctic Peninsula ice core

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Till deposits, related to advances of mountain glaciers, and lake sediments record periods of abrupt warming and cooling during the Late Glacial interval (LG) (17,500 to 11,650 cal yr BP) in the



The Little Ice Age and Medieval Warm Period in the Sargasso Sea

  • L. Keigwin
  • Environmental Science, Geography
  • 1996
Sea surface temperature (SST), salinity, and flux of terrigenous material oscillated on millennial time scales in the Pleistocene North Atlantic, but there are few records of Holocene variability.

Abrupt climate fluctuations in the tropics: the influence of Atlantic Ocean circulation

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The analyses of two ice cores from a southern tropical ice cap provide a record of climatic conditions over 1000 years for a region where other proxy records are nearly absent and confirms the worldwide character of the Little Ice Age.

Possible role of dust-induced regional warming in abrupt climate change during the last glacial period

RECORDS from loess, sediments and ice cores indicate that the concentrations of tropospheric aerosols were higher in glacial periods than they are today, and that they peaked just before glacial

A 20,000-year record of ocean circulation and climate change from the Santa Barbara basin

MUCH of the evidence for climate-driven fluctuations in ocean circulation during the past 20,000 years has come from studies of the North Atlantic region1á-6. The extent to which such interactions

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Sulfate concentrations from continuous biyearly sampling of the GISP2 Greenland ice core provide a record of potential climate-forcing volcanism since 7000 B.C. with sulfate deposition equal to or up to five times that of the largest known historical eruptions.

A 10‐century comparison of prominent bipolar volcanic events in ice cores

Measurements of key chemical and physical parameters made along continuous and selected long sections of polar ice cores provide reliable past snow accumulation rates and other environmental records.

Are the past variations of the stratospheric sulfate burden recorded in central Antarctic snow and ice layers

Thirty-two snow samples, taken from a pit dug at Dome C (central Antarctica) and covering a continuous time period of about 100 years from 1880 ( +- 5 years) up to the present, have been subjected to

An ice-core record of atmospheric response to anthropogenic sulphate and nitrate

RECORDS of sulphate and nitrate concentrations in ice cores show that these concentrations have increased recently because of the long-range transport of pollution from middle latitudes1–5. But these

Holocene Climatic Variations—Their Pattern and Possible Cause