The role of seasonality of mineral dust concentration and size on glacial/interglacial dust changes in the EPICA Dronning Maud Land ice core
We present a record of particulate dust concentration and size distribution in subannual resolution measured on the European Project for Ice Coring in Antarctica (EPICA) Dronning Maud Land (EDML) ice core drilled in the Atlantic sector of the East Antarctic plateau. The record reaches from present d...
Published in: | Journal of Geophysical Research: Atmospheres |
---|---|
Main Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Wiley
2015
|
Subjects: | |
Online Access: | https://epic.awi.de/id/eprint/38863/ https://epic.awi.de/id/eprint/38863/1/772025_1_merged_1439107174.pdf http://onlinelibrary.wiley.com/doi/10.1002/2015JD023608/full https://hdl.handle.net/10013/epic.46146 https://hdl.handle.net/10013/epic.46146.d001 |
id |
ftawi:oai:epic.awi.de:38863 |
---|---|
record_format |
openpolar |
spelling |
ftawi:oai:epic.awi.de:38863 2024-09-15T17:42:34+00:00 The role of seasonality of mineral dust concentration and size on glacial/interglacial dust changes in the EPICA Dronning Maud Land ice core Wegner, Anna Fischer, Hubertus Delmonte, Barbara Petit, Jean Robert Erhardt, Tobias Ruth, Urs Svensson, Anders Vinther, Bo M. Miller, Heinrich 2015-10-05 application/pdf https://epic.awi.de/id/eprint/38863/ https://epic.awi.de/id/eprint/38863/1/772025_1_merged_1439107174.pdf http://onlinelibrary.wiley.com/doi/10.1002/2015JD023608/full https://hdl.handle.net/10013/epic.46146 https://hdl.handle.net/10013/epic.46146.d001 unknown Wiley https://epic.awi.de/id/eprint/38863/1/772025_1_merged_1439107174.pdf https://hdl.handle.net/10013/epic.46146.d001 Wegner, A. , Fischer, H. , Delmonte, B. , Petit, J. R. , Erhardt, T. , Ruth, U. , Svensson, A. , Vinther, B. M. and Miller, H. (2015) The role of seasonality of mineral dust concentration and size on glacial/interglacial dust changes in the EPICA Dronning Maud Land ice core , Journal of Geophysical Research-Atmospheres, 120 , pp. 9916-9931 . doi:10.1002/2015JD023608 <https://doi.org/10.1002/2015JD023608> , hdl:10013/epic.46146 EPIC3Journal of Geophysical Research-Atmospheres, Wiley, 120, pp. 9916-9931, ISSN: 0148-0227 Article isiRev 2015 ftawi https://doi.org/10.1002/2015JD023608 2024-06-24T04:12:21Z We present a record of particulate dust concentration and size distribution in subannual resolution measured on the European Project for Ice Coring in Antarctica (EPICA) Dronning Maud Land (EDML) ice core drilled in the Atlantic sector of the East Antarctic plateau. The record reaches from present day back to the penultimate glacial until 145,000 years B.P. with subannual resolution from 60,000 years B.P. to the present. Mean dust concentrations are a factor of 46 higher during the glacial (~850–4600 ng/mL) compared to the Holocene (~16–112 ng/mL) with slightly smaller dust particles during the glacial compared to the Holocene and with an absolute minimum in the dust size at 16,000 years B.P. The changes in dust concentration are mainly attributed to changes in source conditions in southern South America. An increase in the modal value of the dust size suggests that at 16,000 years B.P. a major change in atmospheric circulation apparently allowed more direct transport of dust particles to the EDML drill site. We find a clear in-phase relation of the seasonal variation in dust mass concentration and dust size during the glacial (r(conc,size) = 0.8) but no clear phase relationship during the Holocene (0 < r(conc,size) < 0.4). With a simple conceptual 1-D model describing the transport of the dust to the ice sheet using the size as an indicator for transport intensity, we find that the effect of the changes in the seasonality of the source emission strength and the transport intensity on the dust decrease over Transition 1 can significantly contribute to the large decrease of dust concentration from the glacial to the Holocene. Article in Journal/Newspaper Antarc* Antarctic Antarctica Dronning Maud Land EPICA ice core Ice Sheet Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Journal of Geophysical Research: Atmospheres 120 19 9916 9931 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
We present a record of particulate dust concentration and size distribution in subannual resolution measured on the European Project for Ice Coring in Antarctica (EPICA) Dronning Maud Land (EDML) ice core drilled in the Atlantic sector of the East Antarctic plateau. The record reaches from present day back to the penultimate glacial until 145,000 years B.P. with subannual resolution from 60,000 years B.P. to the present. Mean dust concentrations are a factor of 46 higher during the glacial (~850–4600 ng/mL) compared to the Holocene (~16–112 ng/mL) with slightly smaller dust particles during the glacial compared to the Holocene and with an absolute minimum in the dust size at 16,000 years B.P. The changes in dust concentration are mainly attributed to changes in source conditions in southern South America. An increase in the modal value of the dust size suggests that at 16,000 years B.P. a major change in atmospheric circulation apparently allowed more direct transport of dust particles to the EDML drill site. We find a clear in-phase relation of the seasonal variation in dust mass concentration and dust size during the glacial (r(conc,size) = 0.8) but no clear phase relationship during the Holocene (0 < r(conc,size) < 0.4). With a simple conceptual 1-D model describing the transport of the dust to the ice sheet using the size as an indicator for transport intensity, we find that the effect of the changes in the seasonality of the source emission strength and the transport intensity on the dust decrease over Transition 1 can significantly contribute to the large decrease of dust concentration from the glacial to the Holocene. |
format |
Article in Journal/Newspaper |
author |
Wegner, Anna Fischer, Hubertus Delmonte, Barbara Petit, Jean Robert Erhardt, Tobias Ruth, Urs Svensson, Anders Vinther, Bo M. Miller, Heinrich |
spellingShingle |
Wegner, Anna Fischer, Hubertus Delmonte, Barbara Petit, Jean Robert Erhardt, Tobias Ruth, Urs Svensson, Anders Vinther, Bo M. Miller, Heinrich The role of seasonality of mineral dust concentration and size on glacial/interglacial dust changes in the EPICA Dronning Maud Land ice core |
author_facet |
Wegner, Anna Fischer, Hubertus Delmonte, Barbara Petit, Jean Robert Erhardt, Tobias Ruth, Urs Svensson, Anders Vinther, Bo M. Miller, Heinrich |
author_sort |
Wegner, Anna |
title |
The role of seasonality of mineral dust concentration and size on glacial/interglacial dust changes in the EPICA Dronning Maud Land ice core |
title_short |
The role of seasonality of mineral dust concentration and size on glacial/interglacial dust changes in the EPICA Dronning Maud Land ice core |
title_full |
The role of seasonality of mineral dust concentration and size on glacial/interglacial dust changes in the EPICA Dronning Maud Land ice core |
title_fullStr |
The role of seasonality of mineral dust concentration and size on glacial/interglacial dust changes in the EPICA Dronning Maud Land ice core |
title_full_unstemmed |
The role of seasonality of mineral dust concentration and size on glacial/interglacial dust changes in the EPICA Dronning Maud Land ice core |
title_sort |
role of seasonality of mineral dust concentration and size on glacial/interglacial dust changes in the epica dronning maud land ice core |
publisher |
Wiley |
publishDate |
2015 |
url |
https://epic.awi.de/id/eprint/38863/ https://epic.awi.de/id/eprint/38863/1/772025_1_merged_1439107174.pdf http://onlinelibrary.wiley.com/doi/10.1002/2015JD023608/full https://hdl.handle.net/10013/epic.46146 https://hdl.handle.net/10013/epic.46146.d001 |
genre |
Antarc* Antarctic Antarctica Dronning Maud Land EPICA ice core Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctica Dronning Maud Land EPICA ice core Ice Sheet |
op_source |
EPIC3Journal of Geophysical Research-Atmospheres, Wiley, 120, pp. 9916-9931, ISSN: 0148-0227 |
op_relation |
https://epic.awi.de/id/eprint/38863/1/772025_1_merged_1439107174.pdf https://hdl.handle.net/10013/epic.46146.d001 Wegner, A. , Fischer, H. , Delmonte, B. , Petit, J. R. , Erhardt, T. , Ruth, U. , Svensson, A. , Vinther, B. M. and Miller, H. (2015) The role of seasonality of mineral dust concentration and size on glacial/interglacial dust changes in the EPICA Dronning Maud Land ice core , Journal of Geophysical Research-Atmospheres, 120 , pp. 9916-9931 . doi:10.1002/2015JD023608 <https://doi.org/10.1002/2015JD023608> , hdl:10013/epic.46146 |
op_doi |
https://doi.org/10.1002/2015JD023608 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
120 |
container_issue |
19 |
container_start_page |
9916 |
op_container_end_page |
9931 |
_version_ |
1810489189027807232 |