Variability in sediment particle size, mineralogy, and Fe mode of occurrence across dust-source inland drainage basins: the case of the lower Drâa Valley, Morocco

The effects of desert dust upon climate and ecosystems depend strongly on its particle size and size-resolved mineralogical composition. However, there is very limited quantitative knowledge on the particle size and composition of the parent sediments along with their variability within dust-source...

ver descrição completa

Detalhes bibliográficos
Autores: González-Romero, Adolfo, González-Flórez, Cristina, Panta, Agnesh, Yus-Díez, Jesús, Reche, Cristina, Córdoba, Patricia, Moreno, Natalia, Alastuey, Andrés, Kandler, Konrad, Klose, Martina, Baldo, Clarissa, Clark, Roger N., Shi, Zongbo, Querol, Xavier, Pérez García-Pando, Carlos
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2023
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/345259
Acesso em linha:http://hdl.handle.net/10261/345259
https://api.elsevier.com/content/abstract/scopus_id/85183012683
Access Level:acceso abierto
Palavra-chave:Desert dust
Climate
id ES_3fd7a3b45ef455c4e640ad365e89df0c
oai_identifier_str oai:digital.csic.es:10261/345259
network_acronym_str ES
network_name_str España
repository_id_str
spelling Variability in sediment particle size, mineralogy, and Fe mode of occurrence across dust-source inland drainage basins: the case of the lower Drâa Valley, MoroccoGonzález-Romero, AdolfoGonzález-Flórez, CristinaPanta, AgneshYus-Díez, JesúsReche, CristinaCórdoba, PatriciaMoreno, NataliaAlastuey, AndrésKandler, KonradKlose, MartinaBaldo, ClarissaClark, Roger N.Shi, ZongboQuerol, XavierPérez García-Pando, CarlosDesert dustClimateThe effects of desert dust upon climate and ecosystems depend strongly on its particle size and size-resolved mineralogical composition. However, there is very limited quantitative knowledge on the particle size and composition of the parent sediments along with their variability within dust-source regions, particularly in dust emission hotspots. The lower Drâa Valley, an inland drainage basin and dust hotspot region located in the Moroccan Sahara, was chosen for a comprehensive analysis of sediment particle size and mineralogy. Different sediment type samples (n=42) were collected, including paleo-sediments, paved surfaces, crusts, and dunes, and analysed for particle-size distribution (minimally and fully dispersed samples) and mineralogy. Furthermore, Fe sequential wet extraction was carried out to characterise the modes of occurrence of Fe, including Fe in Fe (oxyhydr)oxides, mainly from goethite and hematite, which are key to dust radiative effects; the poorly crystalline pool of Fe (readily exchangeable ionic Fe and Fe in nano-Fe oxides), relevant to dust impacts upon ocean biogeochemistry; and structural Fe. Results yield a conceptual model where both particle size and mineralogy are segregated by transport and deposition of sediments during runoff of water across the basin and by the precipitation of salts, which causes a sedimentary fractionation. The proportion of coarser particles enriched in quartz is higher in the highlands, while that of finer particles rich in clay, carbonates, and Fe oxides is higher in the lowland dust emission hotspots. There, when water ponds and evaporates, secondary carbonates and salts precipitate, and the clays are enriched in readily exchangeable ionic Fe, due to sorption of dissolved Fe by illite. The results differ from currently available mineralogical atlases and highlight the need for observationally constrained global high-resolution mineralogical data for mineral-speciated dust modelling. The dataset obtained represents an important resource for future evaluation of surface mineralogy retrievals from spaceborne spectroscopy.This research has been supported by the European Research Council, H2020 European Research Council (grant no. 773051); the AXA Research Fund (Chair on Sand and Dust Storms at BSC); the Agència de Gestió d'Ajuts Universitaris i de Recerca (grant no. 2020_FI B 00678); the Deutsche Forschungsgemeinschaft (grant no. 264907654); and the Helmholtz Association (grant no. VH-NG-1533). We acknowledge support of the publication fee by the CSIC Open Access Publication Support Initiative through its Unit of Information Resources for Research (URICI).Peer reviewedEuropean Geosciences UnionEuropean Research Council0000-0003-0977-60190000-0002-3603-30880000-0002-7953-83340000-0002-8124-14920000-0003-0596-43540000-0002-5453-54950000-0001-8190-37000000-0003-2412-692X0000-0002-7157-543X0000-0002-4456-0697Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202420242023info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/345259https://api.elsevier.com/content/abstract/scopus_id/85183012683reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/EC/H2020/773051Atmospheric Chemistry and Physicshttps://doi.org/10.5194/acp-23-15815-2023Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3452592026-05-22T06:33:51Z
dc.title.none.fl_str_mv Variability in sediment particle size, mineralogy, and Fe mode of occurrence across dust-source inland drainage basins: the case of the lower Drâa Valley, Morocco
title Variability in sediment particle size, mineralogy, and Fe mode of occurrence across dust-source inland drainage basins: the case of the lower Drâa Valley, Morocco
spellingShingle Variability in sediment particle size, mineralogy, and Fe mode of occurrence across dust-source inland drainage basins: the case of the lower Drâa Valley, Morocco
González-Romero, Adolfo
Desert dust
Climate
title_short Variability in sediment particle size, mineralogy, and Fe mode of occurrence across dust-source inland drainage basins: the case of the lower Drâa Valley, Morocco
title_full Variability in sediment particle size, mineralogy, and Fe mode of occurrence across dust-source inland drainage basins: the case of the lower Drâa Valley, Morocco
title_fullStr Variability in sediment particle size, mineralogy, and Fe mode of occurrence across dust-source inland drainage basins: the case of the lower Drâa Valley, Morocco
title_full_unstemmed Variability in sediment particle size, mineralogy, and Fe mode of occurrence across dust-source inland drainage basins: the case of the lower Drâa Valley, Morocco
title_sort Variability in sediment particle size, mineralogy, and Fe mode of occurrence across dust-source inland drainage basins: the case of the lower Drâa Valley, Morocco
dc.creator.none.fl_str_mv González-Romero, Adolfo
González-Flórez, Cristina
Panta, Agnesh
Yus-Díez, Jesús
Reche, Cristina
Córdoba, Patricia
Moreno, Natalia
Alastuey, Andrés
Kandler, Konrad
Klose, Martina
Baldo, Clarissa
Clark, Roger N.
Shi, Zongbo
Querol, Xavier
Pérez García-Pando, Carlos
author González-Romero, Adolfo
author_facet González-Romero, Adolfo
González-Flórez, Cristina
Panta, Agnesh
Yus-Díez, Jesús
Reche, Cristina
Córdoba, Patricia
Moreno, Natalia
Alastuey, Andrés
Kandler, Konrad
Klose, Martina
Baldo, Clarissa
Clark, Roger N.
Shi, Zongbo
Querol, Xavier
Pérez García-Pando, Carlos
author_role author
author2 González-Flórez, Cristina
Panta, Agnesh
Yus-Díez, Jesús
Reche, Cristina
Córdoba, Patricia
Moreno, Natalia
Alastuey, Andrés
Kandler, Konrad
Klose, Martina
Baldo, Clarissa
Clark, Roger N.
Shi, Zongbo
Querol, Xavier
Pérez García-Pando, Carlos
author2_role author
author
author
author
author
author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv European Research Council
0000-0003-0977-6019
0000-0002-3603-3088
0000-0002-7953-8334
0000-0002-8124-1492
0000-0003-0596-4354
0000-0002-5453-5495
0000-0001-8190-3700
0000-0003-2412-692X
0000-0002-7157-543X
0000-0002-4456-0697
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Desert dust
Climate
topic Desert dust
Climate
description The effects of desert dust upon climate and ecosystems depend strongly on its particle size and size-resolved mineralogical composition. However, there is very limited quantitative knowledge on the particle size and composition of the parent sediments along with their variability within dust-source regions, particularly in dust emission hotspots. The lower Drâa Valley, an inland drainage basin and dust hotspot region located in the Moroccan Sahara, was chosen for a comprehensive analysis of sediment particle size and mineralogy. Different sediment type samples (n=42) were collected, including paleo-sediments, paved surfaces, crusts, and dunes, and analysed for particle-size distribution (minimally and fully dispersed samples) and mineralogy. Furthermore, Fe sequential wet extraction was carried out to characterise the modes of occurrence of Fe, including Fe in Fe (oxyhydr)oxides, mainly from goethite and hematite, which are key to dust radiative effects; the poorly crystalline pool of Fe (readily exchangeable ionic Fe and Fe in nano-Fe oxides), relevant to dust impacts upon ocean biogeochemistry; and structural Fe. Results yield a conceptual model where both particle size and mineralogy are segregated by transport and deposition of sediments during runoff of water across the basin and by the precipitation of salts, which causes a sedimentary fractionation. The proportion of coarser particles enriched in quartz is higher in the highlands, while that of finer particles rich in clay, carbonates, and Fe oxides is higher in the lowland dust emission hotspots. There, when water ponds and evaporates, secondary carbonates and salts precipitate, and the clays are enriched in readily exchangeable ionic Fe, due to sorption of dissolved Fe by illite. The results differ from currently available mineralogical atlases and highlight the need for observationally constrained global high-resolution mineralogical data for mineral-speciated dust modelling. The dataset obtained represents an important resource for future evaluation of surface mineralogy retrievals from spaceborne spectroscopy.
publishDate 2023
dc.date.none.fl_str_mv 2023
2024
2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/345259
https://api.elsevier.com/content/abstract/scopus_id/85183012683
url http://hdl.handle.net/10261/345259
https://api.elsevier.com/content/abstract/scopus_id/85183012683
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/EC/H2020/773051
Atmospheric Chemistry and Physics
https://doi.org/10.5194/acp-23-15815-2023
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv European Geosciences Union
publisher.none.fl_str_mv European Geosciences Union
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869406688439697408
score 15,812455

Registos relacionados