Asynchronous terrestrial and marine signals of climate change during Heinrich events.
Tropical regions have been reported to play a key role in climate dynamics. To date, however, there are uncertainties in the timing and the amplitude of the response of tropical ecosystems to millennial-scale climate change. We present evidence of an asynchrony between terrestrial and marine signals of climate change during Heinrich events preserved in marine sediment cores from the Brazilian continental margin. The inferred time lag of about 1000 to 2000 years is much larger than the ecological response to recent climate change and appears to be related to the nature of hydrological changes.
Jennerjahn
Tim C
TC
Zentrum für Marine Tropenökologie, Fahrenheitstrasse 6, D-28359 Bremen, Germany. tim.jennerjahn@zmt-bremen.de
Ittekkot
Venugopalan
V
Arz
Helge W
HW
Behling
Hermann
H
Pätzold
Jürgen
J
Wefer
Gerold
G
D001267:Atlantic Ocean; D001938:Brazil; D002247:Carbon Isotopes; D002980:Climate; D017753:Ecosystem; D029624:Ferns; D019015:Geologic Sediments; D009587:Nitrogen Isotopes; D010944:Plants; D011058:Pollen; D011891:Rain; D012623:Seawater; D013170:Spores; D013995:Time; D014197:Trees; D014329:Tropical Climate
D002247:Carbon Isotopes; D009587:Nitrogen Isotopes