Mineral dust deposition in interglacial and glacial climate conditions: model results

The global aerosol/climate model ECHAM5-HAM is used in order to investigate the dust cycle for four interglacial and one glacial climate conditions. The 20-year time-slices are the pre-industrial control (CTRL), mid-Holocene (6000 years BP), last glacial inception (115000 years BP), Eemian (126000 years BP) and Last Glacial Maximum (LGM) (21000 years BP) time intervals. The study is focused on the Antarctic region. The model is able to reproduce the magnitude order of dust deposition globally for the pre-industial and LGM climates. Correlation coefficient of the natural logarithm of the observed and modeled values is 0.78 for the CTRL and 0.81 for the LGM. For the pre-industrial simulation the model overestimates observed values in Antarctica by a factor of about 2-3 due to overestimation of the Australian dust source and too high wet deposition in the Antarctica interior. In the LGM, the model underestimates dust deposition in eastern Antarctica by a factor of about 4-5 due to underestimation of the South American dust source. More records are needed to validate dust deposition for the past interglacial time-slices. The modeled results show that dust deposition in Antarctica in the past interglacial time-slices is higher than in the CTRL simulation. The largest increase of dust deposition in Antarctica is simulated for the LGM, showing about 10-fold increase compared to CTRL.

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Cite this as

Sudarchikova, Natalia (2012). Dataset: Mineral dust deposition in interglacial and glacial climate conditions: model results. https://doi.org/10.1594/PANGAEA.802191

DOI retrieved: 2012

Additional Info

Field Value
Imported on November 30, 2024
Last update November 30, 2024
License CC-BY-3.0
Source https://doi.org/10.1594/PANGAEA.802191
Author Sudarchikova, Natalia
Given Name Natalia
Family Name Sudarchikova
Source Creation 2012
Publication Year 2012
Resource Type text/tab-separated-values - filename: Sudarchikova-2012_dust-deposition_link-to-model-results
Subject Areas
Name: Atmosphere

Name: Lithosphere

Related Identifiers
Title: Modelling of mineral dust for interglacial and glacial climate conditions with a focus on Antarctica
Identifier: https://doi.org/10.5194/cp-11-765-2015
Type: DOI
Relation: References
Year: 2015
Source: Climate of the Past
Authors: Sudarchikova Natalia , Mikolajewicz Uwe , Timmreck Claudia , O'Donnell D , Schurgers Guy , Sein Dmitry , Zhang Kai .