干旱区生态环境知识资源中心(Arid): Characterization of the particle size distribution, mineralogy, and Fe mode of occurrence of dust-emitting sediments from the Mojave Desert, California, USA

Arid

DOI	10.5194/acp-24-9155-2024
	Characterization of the particle size distribution, mineralogy, and Fe mode of occurrence of dust-emitting sediments from the Mojave Desert, California, USA
	Gonzalez-Romero, Adolfo; Gonzalez-Florez, Cristina; Panta, Agnesh; Yus-Diez, Jesus; Cordoba, Patricia; Alastuey, Andres; Moreno, Natalia; Hernandez-Chiriboga, Melani; Kandler, Konrad; Klose, Martina; Clark, Roger N.; Ehlmann, Bethany L.; Greenberger, Rebecca N.; Keebler, Abigail M.; Brodrick, Phil; Green, Robert; Ginoux, Paul; Querol, Xavier; Perez Garcia-Pando, Carlos
通讯作者	González-Romero, A
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
ISSN	1680-7316
EISSN	1680-7324
出版年	2024
卷号	24 期号:16 页码:9155-9176
英文摘要	Constraining dust models to understand and quantify the effect of dust upon climate and ecosystems requires comprehensive analyses of the physiochemical properties of dust-emitting sediments in arid regions. Building upon previous studies in the Moroccan Sahara and Iceland, we analyse a diverse set of crusts and aeolian ripples (n=55) from various potential dust-emitting basins within the Mojave Desert, California, USA. Our focus is on characterizing the particle size distribution (PSD), mineralogy, aggregation/cohesion state, and Fe mode of occurrence. Our results show differences in fully and minimally dispersed PSDs, with crusts exhibiting average median diameters of 92 and 37 mu m, respectively, compared to aeolian ripples with 226 and 213 mu m, respectively. Mineralogical analyses unveiled strong variations between crusts and ripples, with crusts being enriched in phyllosilicates (24 % vs. 7.8 %), carbonates (6.6 % vs. 1.1 %), Na salts (7.3 % vs. 1.1 %), and zeolites (1.2 % and 0.12 %) and ripples being enriched in feldspars (48 % vs. 37 %), quartz (32 % vs. 16 %), and gypsum (4.7 % vs. 3.1 %). The size fractions from crust sediments display a homogeneous mineralogy, whereas those of aeolian ripples display more heterogeneity, mostly due to different particle aggregation. Bulk Fe content analyses indicate higher concentrations in crusts (3.0 +/- 1.3 wt %) compared to ripples (1.9 +/- 1.1 wt %), with similar proportions in their Fe mode of occurrence: nano-sized Fe oxides and readily exchangeable Fe represent similar to 1.6 %, hematite and goethite similar to 15 %, magnetite/maghemite similar to 2.0 %, and structural Fe in silicates similar to 80 % of the total Fe. We identified segregation patterns in the PSD and mineralogy differences in Na salt content within the Mojave basins, which can be explained by sediment transportation dynamics and precipitates due to groundwater table fluctuations described in previous studies in the region. Mojave Desert crusts show similarities with previously sampled crusts in the Moroccan Sahara in terms of the PSD and readily exchangeable Fe yet exhibit substantial differences in mineralogical composition, which should significantly influence the characteristic of the emitted dust particles.
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001296087700001
WOS关键词	QUANTITATIVE PHASE-ANALYSIS ; CHEMICAL-COMPOSITION ; FIELD-MEASUREMENTS ; SOUTHERN NEVADA ; ICE NUCLEATION ; AEROSOLS ; LAKE ; WIND ; VARIABILITY ; DEPOSITION
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/402984
推荐引用方式 GB/T 7714	Gonzalez-Romero, Adolfo,Gonzalez-Florez, Cristina,Panta, Agnesh,et al. Characterization of the particle size distribution, mineralogy, and Fe mode of occurrence of dust-emitting sediments from the Mojave Desert, California, USA[J],2024,24(16):9155-9176.
APA	Gonzalez-Romero, Adolfo.,Gonzalez-Florez, Cristina.,Panta, Agnesh.,Yus-Diez, Jesus.,Cordoba, Patricia.,...&Perez Garcia-Pando, Carlos.(2024).Characterization of the particle size distribution, mineralogy, and Fe mode of occurrence of dust-emitting sediments from the Mojave Desert, California, USA.ATMOSPHERIC CHEMISTRY AND PHYSICS,24(16),9155-9176.
MLA	Gonzalez-Romero, Adolfo,et al."Characterization of the particle size distribution, mineralogy, and Fe mode of occurrence of dust-emitting sediments from the Mojave Desert, California, USA".ATMOSPHERIC CHEMISTRY AND PHYSICS 24.16(2024):9155-9176.