Dataset Information

First field-based observations of ?²H and ?¹⁸O values of event-based precipitation, rivers and other water bodies in the Dzungarian Gobi, SW Mongolia.

ABSTRACT: For certain remote areas like Mongolia, field-based precipitation, surface and ground water isotopic data are scarce. So far no such data exist for the Mongolian Gobi desert, which hinders the understanding of isotopic fractionation processes in this extreme, arid region. We collected 26 event-based precipitation samples, 39 Bij river samples, and 75 samples from other water bodies in the Dzungarian Gobi in SW Mongolia over a period of 16 months for hydrogen and oxygen stable isotope analysis. ?²H and ?¹⁸O values in precipitation show high seasonal variation and cover an extreme range: 175?‰ for ?²H and 24?‰ for ?¹⁸O values. The calculated local meteoric water line (LMWL) shows the isotopic characteristics of precipitation in an arid region. Individual water samples fall into one of three groups: within, above or below the 95?% confidence interval of LMWL. Data presented provide a basis for future studies in this region.

SUBMITTER: Burnik Sturm M

PROVIDER: S-EPMC5332016 | biostudies-literature | 2017 May

REPOSITORIES: biostudies-literature

ACCESS DATA

Publications

First field-based observations of δ<sup>2</sup>H and δ<sup>18</sup>O values of event-based precipitation, rivers and other water bodies in the Dzungarian Gobi, SW Mongolia.

Burnik Šturm Martina M Ganbaatar Oyunsaikhan O Voigt Christian C CC Kaczensky Petra P

Isotopes in environmental and health studies 20161012 2

For certain remote areas like Mongolia, field-based precipitation, surface and ground water isotopic data are scarce. So far no such data exist for the Mongolian Gobi desert, which hinders the understanding of isotopic fractionation processes in this extreme, arid region. We collected 26 event-based precipitation samples, 39 Bij river samples, and 75 samples from other water bodies in the Dzungarian Gobi in SW Mongolia over a period of 16 months for hydrogen and oxygen stable isotope analysis. δ ...[more]

PMID: 27733073

Similar Datasets

Project description:The past Asian precipitation δ18O (δ18Op) records from stalagmites and other deposits have shown significant orbital-scale variations, but their climatic implications and regional differences are still not fully understood. This study, as the first attempt of a 300-kyr transient stable isotope-enabled simulation, investigated the characteristics and mechanisms of the orbital-scale δ18Op variations in three representative regions of Asia: arid Central Asia (CA), monsoonal South Asia (SA) and monsoonal East Asia (EA). The modelling results showed that the variations in the CA, SA and EA annual δ18Op exhibited significant but asynchronous 23-kyr precession cycles. Further analyses revealed that although the precession-induced insolation variation was the ultimate cause of the δ18Op variation in all three regions, the dominant mechanisms and the involved physical processes were distinct among them. For the CA region, the rainy-season (November-March) temperature effect and water vapour transport by the westerly circulation were identified as the key precession-scale processes linking the October-February boreal mid-latitude insolation to the rainy-season or annual δ18Op. In the SA region, the rainy-season (June-September) precipitation amount effect and upstream depletion of the monsoonal water vapour δ18O served as the main mechanisms linking the rainy-season or annual δ18Op to the April-July insolation variation at the precession scale. For the EA region, however, the precession-scale annual δ18Op was mainly controlled by the late-monsoon (August-September) and pre-monsoon (April-May) water vapour transport patterns, which were driven by the July-August insolation and the global ice volume, respectively. These results suggest that the climatic implications of the orbital-scale Asia δ18Op variations are sensitive to their geographic locations as determined by the combined effects of insolation and regional circulation patterns associated with the respective rainy seasons. This study provides new insights into understanding the regional differences and formation mechanisms of the Asian orbital-scale δ18Op variations.

Dataset Information

First field-based observations of ?²H and ?¹⁸O values of event-based precipitation, rivers and other water bodies in the Dzungarian Gobi, SW Mongolia.

Publications

First field-based observations of δ<sup>2</sup>H and δ<sup>18</sup>O values of event-based precipitation, rivers and other water bodies in the Dzungarian Gobi, SW Mongolia.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets

Dataset Information

First field-based observations of ?2H and ?18O values of event-based precipitation, rivers and other water bodies in the Dzungarian Gobi, SW Mongolia.

Publications

First field-based observations of δ<sup>2</sup>H and δ<sup>18</sup>O values of event-based precipitation, rivers and other water bodies in the Dzungarian Gobi, SW Mongolia.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets

First field-based observations of ?²H and ?¹⁸O values of event-based precipitation, rivers and other water bodies in the Dzungarian Gobi, SW Mongolia.