INVESTIGADORES
BORROMEI Ana Maria
artículos
Título:
Late-Holocene climatic changes in Tierra del Fuego based on multy-proxy analyses of peat deposits.
Autor/es:
MAUQUOY D.; BLAAUW M.; VAN GEEL B.; BORROMEI A.; QUATTROCCHIO M.; CHAMBERS F.; POSSNERT G.
Revista:
QUATERNARY RESEARCH
Editorial:
Elsevier Science Ltd.
Referencias:
Lugar: USA; Año: 2004 vol. 61 p. 148 - 158
ISSN:
0033-5894
Resumen:
A ca. 1400-yr record from a raised bog in Isla Grande, Tierra del Fuego, Argentina, registers climate fluctuations, including a Medieval
Warm Period, although evidence for the Little Ice Age is less clear. Changes in temperature and/or precipitation were inferred from plant
macrofossils, pollen, fungal spores, testate amebae, and peat humification. The chronology was established using a 14C wiggle-matching
technique that provides improved age control for at least part of the record compared to other sites. These new data are presented and compared
with other lines of evidence from the Southern and Northern Hemispheres. A period of low local water tables occurred in the bog between A.D.
9601020, which may correspond to the MedievalWarm Period date range of A.D. 9501045 generated from Northern Hemisphere tree-ring
data. A period of cooler and/or wetter conditions was detected between ca. A.D. 1030 and 1100 and a later period of cooler/wetter conditions
estimated at ca. cal A.D. 18001930, which may correspond to a cooling episode inferred from Law Dome, Antarctica.
technique that provides improved age control for at least part of the record compared to other sites. These new data are presented and compared
with other lines of evidence from the Southern and Northern Hemispheres. A period of low local water tables occurred in the bog between A.D.
9601020, which may correspond to the MedievalWarm Period date range of A.D. 9501045 generated from Northern Hemisphere tree-ring
data. A period of cooler and/or wetter conditions was detected between ca. A.D. 1030 and 1100 and a later period of cooler/wetter conditions
estimated at ca. cal A.D. 18001930, which may correspond to a cooling episode inferred from Law Dome, Antarctica.
technique that provides improved age control for at least part of the record compared to other sites. These new data are presented and compared
with other lines of evidence from the Southern and Northern Hemispheres. A period of low local water tables occurred in the bog between A.D.
9601020, which may correspond to the MedievalWarm Period date range of A.D. 9501045 generated from Northern Hemisphere tree-ring
data. A period of cooler and/or wetter conditions was detected between ca. A.D. 1030 and 1100 and a later period of cooler/wetter conditions
estimated at ca. cal A.D. 18001930, which may correspond to a cooling episode inferred from Law Dome, Antarctica.
14C wiggle-matching
technique that provides improved age control for at least part of the record compared to other sites. These new data are presented and compared
with other lines of evidence from the Southern and Northern Hemispheres. A period of low local water tables occurred in the bog between A.D.
9601020, which may correspond to the MedievalWarm Period date range of A.D. 9501045 generated from Northern Hemisphere tree-ring
data. A period of cooler and/or wetter conditions was detected between ca. A.D. 1030 and 1100 and a later period of cooler/wetter conditions
estimated at ca. cal A.D. 18001930, which may correspond to a cooling episode inferred from Law Dome, Antarctica.