A numerical study of the contributions of dust source regions to the global dust budget

Tanaka, Taichu Y.; Chiba, Momoko

doi:10.1016/j.gloplacha.2006.02.002

Cited by 484 publications

(336 citation statements)

References 55 publications

(69 reference statements)

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“…(For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.) dust source regions Tanaka and Chiba, 2006;Yumimoto et al, 2009).…”

Section: Spatial Dust Flux Pattern In the Subarctic North Pacificmentioning

confidence: 99%

“…Therefore, most studies rely on dust model predictions. Model reconstructions are challenged by the complexity of the topography and local climatic settings of the East Asian dust source regions which can result in over-or under-representations of important sources like the Taklimakan desert Tanaka and Chiba, 2006;Yumimoto et al, 2009). Since arid regions in East Asia are proposed to be the dominant dust sources to the SNP (e.g., Duce et al, 1980;Husar et al, 2001;Sun et al, 2001;Tanaka and Chiba, 2006;Uno et al, 2011), with potential minor contributions from North Africa, Middle East and Central Asia (Creamean et al, 2013;Hsu et al, 2012;Tanaka and Chiba, 2006), their complexity can result in uncertainties of model predictions for the SNP.…”

Section: Introductionmentioning

confidence: 99%

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Eolian dust input to the Subarctic North Pacific

Serno

Winckler

Anderson

et al. 2014

Earth and Planetary Science Letters

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Eolian dust is a significant source of iron and other nutrients that are essential for the health of marine ecosystems and potentially a controlling factor of the high nutrient-low chlorophyll status of the Subarctic North Pacific. We map the spatial distribution of dust input using three different geochemical tracers of eolian dust, 4 He, 232 Th and rare earth elements, in combination with grain size distribution data, from a set of core-top sediments covering the entire Subarctic North Pacific. Using the suite of geochemical proxies to fingerprint different lithogenic components, we deconvolve eolian dust input from other lithogenic inputs such as volcanic ash, ice-rafted debris, riverine and hemipelagic input. While the open ocean sites far away from the volcanic arcs are dominantly composed of pure eolian dust, lithogenic components other than eolian dust play a more crucial role along the arcs. In sites dominated by dust, eolian dust input appears to be characterized by a nearly uniform grain size mode at ∼4 μm.Applying the 230 Th-normalization technique, our proxies yield a consistent pattern of uniform dust fluxes of 1-2 g/m 2 /yr across the Subarctic North Pacific. Elevated eolian dust fluxes of 2-4 g/m 2 /yr characterize the westernmost region off Japan and the southern Kurile Islands south of 45 • N and west of 165 • E along the main pathway of the westerly winds. The core-top based dust flux reconstruction is consistent with recent estimates based on dissolved thorium isotope concentrations in seawater from the Subarctic North Pacific. The dust flux pattern compares well with state-of-the-art dust model predictions in the western and central Subarctic North Pacific, but we find that dust fluxes are higher than modeled fluxes by 0.5-1 g/m 2 /yr in the northwest, northeast and eastern Subarctic North Pacific. Our results provide an important benchmark for biogeochemical models and a robust approach for downcore studies testing dust-induced iron fertilization of past changes in biological productivity in the Subarctic North Pacific.

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Section: Spatial Dust Flux Pattern In the Subarctic North Pacificmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Eolian dust input to the Subarctic North Pacific

Serno

Winckler

Anderson

et al. 2014

Earth and Planetary Science Letters

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show abstract

“…Many of the papers published to date that provide information on health-related particulate matter (PM) research have focussed on the impact of anthropogenically generated PM (such as PM generated by combustion engines) (Bousquet et al 2003;Bruce et al 2000;Ezzati 2005;Romieu et al 2002) while relatively little work has looked at the impact of naturally generated PM (such as PM emanating from dust storms). Winds from the nine principal desert sources transport large amounts of dust around the world (Prospero et al 2002;Tanaka and Chiba 2006). Overall, studies estimate that the global dust emission varies by a factor of slightly more than two, although extreme values from 1,018 Tg year −1 (Miller et al 2004) to 3,000 Tg year −1 (Tegen and Fung 1994) have been established over the last two decades (Engelstaedter et al 2006).…”

Section: Introductionmentioning

confidence: 99%

Desert dust impacts on human health: an alarming worldwide reality and a need for studies in West Africa

et al. 2012

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High desert dust concentrations raise concerns about adverse health effects on human populations. Based on a systematic literature review, this paper aims to learn more about the relationship between desert dust and human health in the world and to analyse the place of West Africa as a study area of interest. Papers focussing on the potential relationship between dust and health and showing quantitative analyses, published between January 1999 and September 2011, were identified using the ISI Web of Knowledge database (N050). A number of adverse health effects, including respiratory, cardiovascular and cardiopulmonary diseases, are associated with dust. This survey highlights obvious dust impacts on human health independently of the study area, health outcomes and method. Moreover, it reveals an imbalance between the areas most exposed to dust and the areas most studied in terms of health effects. None of these studies has been conducted in West Africa, despite the proximity of the Sahara, which produces about half of the yearly global mineral dust. In view of the alarming results in many parts of the world (Asia, Europe, America), this paper concludes by stressing the importance of carrying out impact studies of Saharan dust in West Africa, where dust events are more frequent and intense than anywhere else.

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“…Apart from its direct thermodynamic role in the atmosphere, the Sahara is the world's most significant source of mineral dust in the atmosphere (Tanaka and Chiba, 2006). Various mechanisms are known to lead to high wind speed events in the Sahara and so significant dust uplift.…”

Section: Introductionmentioning

confidence: 99%

Dynamical mechanisms controlling the vertical redistribution of dust and the thermodynamic structure of the West Saharan atmospheric boundary layer during summer

Cuesta

Marsham

Parker

et al. 2009

Atmospheric Science Letters

142

143

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The Saharan atmospheric boundary layer (SABL) plays a significant role in the atmospheric global circulation and directly affects the vertical redistribution of dust originated in the Sahara, the world's largest dust source. Recent measurements have revealed a variety of new dynamical mechanisms that control the structure of the SABL, which are responsible for exchange between the Saharan convective and residual boundary layers. Using new spaceborne laser remote sensing data (CALIPSO) and recently published results, we provide an overview of the following known dynamical mechanisms: diurnal vertical mixing, dynamical lifting (density currents and cold air outbreaks) and topographic effects (mountains and albedo anomalies).

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A numerical study of the contributions of dust source regions to the global dust budget

Cited by 484 publications

References 55 publications

Eolian dust input to the Subarctic North Pacific

Eolian dust input to the Subarctic North Pacific

Desert dust impacts on human health: an alarming worldwide reality and a need for studies in West Africa

Dynamical mechanisms controlling the vertical redistribution of dust and the thermodynamic structure of the West Saharan atmospheric boundary layer during summer

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