Surface crusts on soils/sediments of the southern Aral Sea basin, Uzbekistan

Mees, Florias; Singer, Arieh

doi:10.1016/j.geoderma.2006.03.019

Cited by 39 publications

(23 citation statements)

References 20 publications

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“…It partly forms by incorporative growth along the upper part of the sediment substrate, resulting in a basal part with abundant sediment inclusions and common enclosed glauberite crystals. This kind of growth has also been documented for other bloedite occurrences (Vizcayno et al, 1995;Mees and Singer, 2006) …”

Section: Coarse-grained Xenotopic-hypidiotopic Bloeditesupporting

confidence: 68%

“…For soil environments, possible applications include the assessment of the role of flooding and other processes in the formation of bloedite-bearing surface crusts (e.g. Vizcayno et al, 1995;Mees and Singer, 2006). The present study aims to contribute to the current knowledge of textural features that is required for these applications, by studying salt crusts from a presentday saline lake basin.…”

Section: Introductionmentioning

confidence: 99%

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Bloedite sedimentation in a seasonally dry saline lake (Salada Mediana, Spain)

Mees¹,

Álamo²,

Herrero³

et al. 2011

Sedimentary Geology

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Salt crusts covering the surface of the Salada Mediana, a seasonally dry saline lake in northern Spain, consist predominantly of bloedite (Na 2 Mg(SO 4 ) 2 .4H 2 O). Microscopic features of the crust were investigated to understand processes of bloedite sedimentation. This study was combined with satellite and airborne observations, revealing asymmetrical concentric and parallel-linear patterns, related to wind action.

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Section: Coarse-grained Xenotopic-hypidiotopic Bloeditesupporting

confidence: 68%

Section: Introductionmentioning

confidence: 99%

Bloedite sedimentation in a seasonally dry saline lake (Salada Mediana, Spain)

Mees¹,

Álamo²,

Herrero³

et al. 2011

Sedimentary Geology

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“…The major part of the desiccated seabed is considered as a highly unstable landscape with a high ecological hazard in terms of desertification and eolian erosion (Dukhovny et al, 2008). Salt affected areas are considered as a major source for salt and dust storms in the region and appeared after regression of the Aral Sea (Razakov and Kosnazarov, 1996;Orlovsky et al, 2001;Singer et al, 2003;Mees and Singer, 2006).…”

Section: Study Areamentioning

confidence: 99%

Organohalogen emissions from saline environments – spatial extrapolation using remote sensing as most promising tool

Kotte

Löw²,

Huber

et al. 2012

Biogeosciences

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Abstract. Due to their negative water budget most recent semi-/arid regions are characterized by vast evaporates (salt lakes and salty soils). We recently identified those hypersaline environments as additional sources for a multitude of volatile halogenated organohalogens (VOX). These compounds can affect the ozone layer of the stratosphere and play a key role in the production of aerosols. A remote sensing based analysis was performed in the Southern Aral Sea basin, providing information of major soil types as well as their extent and spatial and temporal evolution. VOX production has been determined in dry and moist soil samples after 24 h. Several C1-and C2 organohalogens have been found in hyper-saline topsoil profiles, including CH 3 Cl, CH 3 Br, CHBr 3 and CHCl 3 . The range of organohalogens also includes trans-1,2-dichloroethene (DCE), which is reported here to be produced naturally for the first time. Using MODIS time series and supervised image classification a daily production rate for DCE has been calculated for the 15 000 km 2 ranging research area in the southern Aralkum. The applied laboratory setup simulates a short-term change in climatic conditions, starting from dried-out saline soil that is instantly humidified during rain events or flooding. It describes the general VOX production potential, but allows only for a rough estimation of resulting emission loads. VOX emissions are expected to increase in the future since the area of salt affected soils is expanding due to the regressing Aral Sea. Opportunities, limits and requirements of satellite based rapid change detection and salt classification are discussed.

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“…As reviewed by Turk and Graham (2011) the genesis of vesicular horizons have been frequently associated with rough soil Page 2 of 23 surfaces or with stone pavements (Bouza et al, 1993), which is not the case in the Monegros playa-lakes where coarse fragments are rare. The vesicular horizon and the lack of stones also occur in other saline flats, as noted by Joeckel and Clement (1999) for eastern Nebraska, by Mees and Singer (2006) for the Aral Sea or by Buck et al (2011) for the Salton Sea in California.On the other hand, the trapping of seeds or other propagules dispersed by tides (Wolters et al, 2004) or by wind is a key factor for plant establishment on flat surfaces, as are the floors of playa-lakes. The biological importance of the soil cracks as seed traps has been stressed by Burmeier et al (2010) and by Espinar and Clemente (2007) as determining how diaspores are distributed within soils.…”

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confidence: 89%