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Environmental Earth Sciences

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01.09.2016 | Original Article

Vertical distribution of sand layer CO₂ concentration and its diurnal variation rules in Alxa desert region, northwest China

verfasst von: Tianjie Shao, Yandong Ma, Jingbo Zhao, Zhibo Dong, Liankai Zhang

Erschienen in: Environmental Earth Sciences | Ausgabe 18/2016

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Abstract

In order to ascertain the vertical distribution of sand layer CO₂ concentration from the Alxa desert region as well as its impact on atmosphere CO₂ and action on global carbon cycle, infrared CO₂ monitor was used to perform 19 drilling holes to observe CO₂ concentration day and night in the Nuoertu megadunes region, Shapotou trellis dunes region and Minqin barchan dunes region. The results showed that atmosphere CO₂ concentration in Alxa desert region is lower than that in the sand layer of 1–5 m depths, which manifests that it is the source region of atmosphere CO₂ and it releases CO₂ day and night during warm seasons. The diurnal variation of sand layer CO₂ concentration in extremely arid Alxa desert region shows obvious regularity: CO₂ concentration of every depth varies from low to high to low from 8:00 am to next day 7:00 am. The diurnal variation of temperature is the main cause of diurnal variation of sand layer CO₂ concentration, which are significantly correlated positively. In extremely arid desert region, sand layer moisture content is the main factor that determines sand layer CO₂ concentration.

Vorheriger Artikel Impact of fly ash on channel morphology and ambient water quality of Chandrabhaga River of Eastern India

Nächster Artikel Dynamic panel-data-based groundwater level prediction and decomposition in an arid hardrock–alluvium aquifer

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Titel: Vertical distribution of sand layer CO2 concentration and its diurnal variation rules in Alxa desert region, northwest China
verfasst von: Tianjie Shao
Yandong Ma
Jingbo Zhao
Zhibo Dong
Liankai Zhang
Publikationsdatum: 01.09.2016
Verlag: Springer Berlin Heidelberg
Erschienen in: Environmental Earth Sciences / Ausgabe 18/2016
Print ISSN: 1866-6280
Elektronische ISSN: 1866-6299
DOI: https://doi.org/10.1007/s12665-016-6083-6

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