Rapid increase in simulated North Atlantic dust deposition due to fast change of northwest African landscape during the Holocene

Marine sediment records from a series of core sites along the northwest African margin show a sudden increase in North Atlantic dust deposition at about 5 ka BP that has been associated with an abrupt end of the African Humid Period (AHP). To assess the causes of the abrupt shift in North Atlantic d...

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Bibliographic Details
Published in:Climate of the past 2018-07, Vol.14 (7), p.1051-1066
Main Authors: Egerer, Sabine, Claussen, Martin, Reick, Christian
Format: Article
Language:English
Subjects:
Atmospheric particulates
Climate
Climate and vegetation
Climate models
Computer simulation
Deposition
Deposition (Geology)
Drying
Dust
Dust cycle
Dust deposition
Dust storms
Dust transport
Dynamics
Emissions
Heterogeneity
Holocene
Holocene paleogeography
Lakes
Landscape
Marine sediments
Observations
Plant cover
Precipitation
Records
Sediment
Simulation
Surface wind
Vegetation
Vegetation cover
Vegetation growth
Winds
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Summary:Marine sediment records from a series of core sites along the northwest African margin show a sudden increase in North Atlantic dust deposition at about 5 ka BP that has been associated with an abrupt end of the African Humid Period (AHP). To assess the causes of the abrupt shift in North Atlantic dust deposition, we explore changes in the Holocene dust cycle and in North African climate and landscape by performing several time slice simulations from 8 ka BP until the preindustrial era. To do this, we use the coupled aerosol-climate model ECHAM6-HAM2 including dynamic vegetation and interactive dust, wherein ocean conditions and lake surface area are prescribed for each time slice.
ISSN:1814-9332
1814-9324
1814-9332
DOI:10.5194/cp-14-1051-2018