Antarctic and Southern Ocean dust transport pathways: Forward-trajectory modeling and rare earth element source constraints from the RICE ice core
Mineral dust fertilization of Southern Ocean surface waters, and mixing with Antarctic deep-water, influences oceanic uptake of carbon dioxide and draws down global atmospheric concentrations during glacial periods. Quantifying modern variability in dust source and transport strength, especially wit...
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Victoria University of Wellington
2015
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ftvuwellington:oai:researcharchive.vuw.ac.nz:10063/4794 2023-08-15T12:37:52+02:00 Antarctic and Southern Ocean dust transport pathways: Forward-trajectory modeling and rare earth element source constraints from the RICE ice core Neff, Peter David Bertler, Nancy Edwards, Ross 2015-11-03T02:16:20Z http://researcharchive.vuw.ac.nz/handle/10063/4794 en_NZ eng Victoria University of Wellington http://researcharchive.vuw.ac.nz/handle/10063/4794 Ice core Dust Antarctica Text Doctoral 2015 ftvuwellington 2023-07-25T17:25:27Z Mineral dust fertilization of Southern Ocean surface waters, and mixing with Antarctic deep-water, influences oceanic uptake of carbon dioxide and draws down global atmospheric concentrations during glacial periods. Quantifying modern variability in dust source and transport strength, especially with respect to high- and low-latitude climate phenomena (e.g. the Southern Annular Mode, El Niño Southern Oscillation), will improve understanding of this important aspect of the global carbon cycle. Using high-order geochemical provenance techniques can also reveal in greater detail what aspects of dust transport are recorded in Antarctic ice core records, allowing for better interpretation of glacial-interglacial dust records at individual sites. First, using forward trajectories and climate reanalysis data, this work explores modern variability (1979-2013) in atmospheric transport of mineral dust from Southern Hemisphere potential source areas (PSA)—primarily Australia, southern South America and southern Africa. Estimates of the relative source and transport strength of New Zealand are also discussed, and compared with other dust PSA to evaluate New Zealand’s potential contribution to Southern Ocean and Antarctic dust deposition. Extra-Antarctic dust PSA distributions are detailed for individual ice core sites, including the newly recovered Roosevelt Island Climate Evolution (RICE) ice core (79.36ºS, 161.71ºW, 550 m a.s.l.). This approach—applicable to many types of aerosol—reveals persistent, strong transport from New Zealand and Patagonia to the southern high-latitudes during all seasons. It also demonstrates that southward transport of air masses from pan-Pacific dust sources is affected by circulation variability initiated in the central tropical Pacific Ocean. High-resolution discrete sampling of the RICE core allows for unprecedented analysis of trace elements at sub-annual to annual scales. The rare earth elements (REE, lanthanide elements Lanthanum to Lutetium) can preserve the signature of their original ... Doctoral or Postdoctoral Thesis Antarc* Antarctic Antarctica ice core Roosevelt Island Southern Ocean Victoria University of Wellington: ResearchArchive Antarctic New Zealand Pacific Patagonia Roosevelt Island ENVELOPE(-162.000,-162.000,-79.283,-79.283) Southern Ocean |
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collection |
Victoria University of Wellington: ResearchArchive |
op_collection_id |
ftvuwellington |
language |
English |
topic |
Ice core Dust Antarctica |
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Ice core Dust Antarctica Neff, Peter David Antarctic and Southern Ocean dust transport pathways: Forward-trajectory modeling and rare earth element source constraints from the RICE ice core |
topic_facet |
Ice core Dust Antarctica |
description |
Mineral dust fertilization of Southern Ocean surface waters, and mixing with Antarctic deep-water, influences oceanic uptake of carbon dioxide and draws down global atmospheric concentrations during glacial periods. Quantifying modern variability in dust source and transport strength, especially with respect to high- and low-latitude climate phenomena (e.g. the Southern Annular Mode, El Niño Southern Oscillation), will improve understanding of this important aspect of the global carbon cycle. Using high-order geochemical provenance techniques can also reveal in greater detail what aspects of dust transport are recorded in Antarctic ice core records, allowing for better interpretation of glacial-interglacial dust records at individual sites. First, using forward trajectories and climate reanalysis data, this work explores modern variability (1979-2013) in atmospheric transport of mineral dust from Southern Hemisphere potential source areas (PSA)—primarily Australia, southern South America and southern Africa. Estimates of the relative source and transport strength of New Zealand are also discussed, and compared with other dust PSA to evaluate New Zealand’s potential contribution to Southern Ocean and Antarctic dust deposition. Extra-Antarctic dust PSA distributions are detailed for individual ice core sites, including the newly recovered Roosevelt Island Climate Evolution (RICE) ice core (79.36ºS, 161.71ºW, 550 m a.s.l.). This approach—applicable to many types of aerosol—reveals persistent, strong transport from New Zealand and Patagonia to the southern high-latitudes during all seasons. It also demonstrates that southward transport of air masses from pan-Pacific dust sources is affected by circulation variability initiated in the central tropical Pacific Ocean. High-resolution discrete sampling of the RICE core allows for unprecedented analysis of trace elements at sub-annual to annual scales. The rare earth elements (REE, lanthanide elements Lanthanum to Lutetium) can preserve the signature of their original ... |
author2 |
Bertler, Nancy Edwards, Ross |
format |
Doctoral or Postdoctoral Thesis |
author |
Neff, Peter David |
author_facet |
Neff, Peter David |
author_sort |
Neff, Peter David |
title |
Antarctic and Southern Ocean dust transport pathways: Forward-trajectory modeling and rare earth element source constraints from the RICE ice core |
title_short |
Antarctic and Southern Ocean dust transport pathways: Forward-trajectory modeling and rare earth element source constraints from the RICE ice core |
title_full |
Antarctic and Southern Ocean dust transport pathways: Forward-trajectory modeling and rare earth element source constraints from the RICE ice core |
title_fullStr |
Antarctic and Southern Ocean dust transport pathways: Forward-trajectory modeling and rare earth element source constraints from the RICE ice core |
title_full_unstemmed |
Antarctic and Southern Ocean dust transport pathways: Forward-trajectory modeling and rare earth element source constraints from the RICE ice core |
title_sort |
antarctic and southern ocean dust transport pathways: forward-trajectory modeling and rare earth element source constraints from the rice ice core |
publisher |
Victoria University of Wellington |
publishDate |
2015 |
url |
http://researcharchive.vuw.ac.nz/handle/10063/4794 |
long_lat |
ENVELOPE(-162.000,-162.000,-79.283,-79.283) |
geographic |
Antarctic New Zealand Pacific Patagonia Roosevelt Island Southern Ocean |
geographic_facet |
Antarctic New Zealand Pacific Patagonia Roosevelt Island Southern Ocean |
genre |
Antarc* Antarctic Antarctica ice core Roosevelt Island Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica ice core Roosevelt Island Southern Ocean |
op_relation |
http://researcharchive.vuw.ac.nz/handle/10063/4794 |
_version_ |
1774296479031099392 |