Dataset Information

Data on stable isotopic composition of ?¹⁸O and ?²H in precipitation in the Varazdin area, NW Croatia.

ABSTRACT: The dataset in this article consists of one year of monthly observations of water stable isotopes in precipitation (July 2019 - May 2020). The samples were collected by rain gauge installed in the Hraš?ica village in the Varaždin area, NW Croatia. The data presented in the article are raw isotope data of precipitation supplemented by calculated d-excess values, and local meteoric water lines (LMWL). The measured data is an extension to previous two year investigations (June 2017 - June 2019), which was published in the research article "Application of Stable Water Isotopes to Improve Conceptual Model of Alluvial Aquifer in the Varaždin Area" [1]. Local meteoric water lines (LMWL) are calculated for the entire period for which isotope analyses exist (June 2017 - May 2020). Presented data can be used as a background for investigation of precipitation, groundwater and surface water origin and their interrelationships.

SUBMITTER: Karlovic I

PROVIDER: S-EPMC7708787 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature

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Data on stable isotopic composition of δ<sup>18</sup>O and δ<sup>2</sup>H in precipitation in the Varaždin area, NW Croatia.

Karlović Igor I Marković Tamara T

Data in brief 20201123

The dataset in this article consists of one year of monthly observations of water stable isotopes in precipitation (July 2019 - May 2020). The samples were collected by rain gauge installed in the Hrašćica village in the Varaždin area, NW Croatia. The data presented in the article are raw isotope data of precipitation supplemented by calculated d-excess values, and local meteoric water lines (LMWL). The measured data is an extension to previous two year investigations (June 2017 - June 2019), wh ...[more]

PMID: 33304968

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Project description:[1] Natural archives of oxygen isotopes in precipitation may be used to study changes in the hydrological cycle in the tropics, but their interpretation is not straightforward. We studied to which degree tree rings of Mimosa acantholoba from southern Mexico record variation in isotopic composition of precipitation and which climatic processes influence oxygen isotopes in tree rings (δ18Otr). Interannual variation in δ18Otr was highly synchronized between trees and closely related to isotopic composition of rain measured at San Salvador, 710 km to the southwest. Correlations with δ13C, growth, or local climate variables (temperature, cloud cover, vapor pressure deficit (VPD)) were relatively low, indicating weak plant physiological influences. Interannual variation in δ18Otr correlated negatively with local rainfall amount and intensity. Correlations with the amount of precipitation extended along a 1000 km long stretch of the Pacific Central American coast, probably as a result of organized storm systems uniformly affecting rainfall in the region and its isotope signal; episodic heavy precipitation events, of which some are related to cyclones, deposit strongly 18O-depleted rain in the region and seem to have affected the δ18Otr signal. Large-scale controls on the isotope signature include variation in sea surface temperatures of tropical north Atlantic and Pacific Ocean. In conclusion, we show that δ18Otr of M. acantholoba can be used as a proxy for source water δ18O and that interannual variation in δ18Oprec is caused by a regional amount effect. This contrasts with δ18O signatures at continental sites where cumulative rainout processes dominate and thus provide a proxy for precipitation integrated over a much larger scale. Our results confirm that processes influencing climate-isotope relations differ between sites located, e.g., in the western Amazon versus coastal Mexico, and that tree ring isotope records can help in disentangling the processes influencing precipitation δ18O.

Dataset Information

Data on stable isotopic composition of ?¹⁸O and ?²H in precipitation in the Varazdin area, NW Croatia.

Publications

Data on stable isotopic composition of δ<sup>18</sup>O and δ<sup>2</sup>H in precipitation in the Varaždin area, NW Croatia.

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Dataset Information

Data on stable isotopic composition of ?18O and ?2H in precipitation in the Varazdin area, NW Croatia.

Publications

Data on stable isotopic composition of δ<sup>18</sup>O and δ<sup>2</sup>H in precipitation in the Varaždin area, NW Croatia.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets

Data on stable isotopic composition of ?¹⁸O and ?²H in precipitation in the Varazdin area, NW Croatia.