scholarly journals Climate Change Impact on the Evolution of the Saline Lakes of the Soan-Sakaser Valley (Central Salt Range; Pakistan): Evidences from Hydrochemistry and Water (δD, δ18O) and Chlorine (δ37Cl) Stable Isotopes

Water ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 912 ◽  
Author(s):  
Syed Asim Hussain ◽  
Feng-Qing Han ◽  
Wenxia Han ◽  
Alejandro Rodríguez ◽  
Ji-Long Han ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Saline Lakes ◽  
Total Dissolved Solids ◽  
Salt Range ◽  
Intense Evaporation ◽  
Regional Source ◽  
History Of ◽  
Water Stable Isotope ◽  
Change Impact ◽  
Δ18o And Δd

The surfaces of saline lakes are shrinking at a threatening rate worldwide. Likewise, the Uchhali complex (formed by three saltwater lakes located in the Salt Range, Pakistan) that serves as a major regional source of water for humans and as a habitat for water birds must be monitored. With this objective in mind, we conducted a study coupling hydrochemistry and stable isotope compositions (δ37Cl, δ18O and δD) in order to characterize its hydrochemical properties and the main processes controlling them. Results showed that the Uchhali complex salinity has dramatically increased compared to other similar lakes in the world. While the Uchhali (UL) and Khabbeki (KL) lakes present a sodium-chloride hydrofacies, the Jahlar (JL) is of a sodium-bicarbonate type. Hydrochemistry parameters indicate that the weathering of surrounding rocks is the major vector for the increase of total dissolved solids in the water. On the other hand, the observed enrichment in heavy isotopes of the water stable isotope compositions implies that the different lakes are undergoing a long history of intense evaporation. The study of the corresponding δ37Cl isotope compositions supports the conclusion that evaporation, along with weathering, are the main driving processes. Besides climate effects that result in the decrease of annual precipitation and the increase of evaporation, water consumption for domestic purposes (household and agriculture) aggravates the rise of the lakes’ salinity.

scholarly journals Stable-isotope time series and precipitation origin from firn-core and snow samples, Altai glaciers, Siberia

2005 ◽  
Vol 51 (175) ◽  
pp. 637-654 ◽  
Author(s):  
Vladimir B. Aizen ◽  
Elena Aizen ◽  
Koji Fujita ◽  
Stanislav A. Nikitin ◽  
Karl J. Kreutz ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Clustering Analysis ◽  
Meteoric Water ◽  
Drainage Basin ◽  
The Arctic ◽  
Deuterium Excess ◽  
Closed Drainage ◽  
Water Stable Isotope ◽  
Firn Core ◽  
Snow Samples

AbstractIn the summers of 2001 and 2002, glacio-climatological research was performed at 4110–4120 m a.s.l. on the Belukha snow/firn plateau, Siberian Altai. Hundreds of samples from snow pits and a 21 m snow/firn core were collected to establish the annual/seasonal/monthly depth–accumulation scale, based on stable-isotope records, stratigraphic analyses and meteorological and synoptic data. The fluctuations of water stable-isotope records show well-preserved seasonal variations. The δ18O and δD relationships in precipitation, snow pits and the snow/firn core have the same slope to the covariance as that of the global meteoric water line. The origins of precipitation nourishing the Belukha plateau were determined based on clustering analysis of δ18O and d-excess records and examination of synoptic atmospheric patterns. Calibration and validation of the developed clusters occurred at event and monthly timescales with about 15% uncertainty. Two distinct moisture sources were shown: oceanic sources with d-excess <12‰, and the Aral–Caspian closed drainage basin sources with d-excess >12‰. Two-thirds of the annual accumulation was from oceanic precipitation, of which more than half had isotopic ratios corresponding to moisture evaporated over the Atlantic Ocean. Precipitation from the Arctic/Pacific Ocean had the lowest deuterium excess, contributing one-tenth to annual accumulation.

scholarly journals Surface mass balance and water stable isotopes derived from firn cores on three ice rises, Fimbul Ice Shelf, Antarctica

2016 ◽  
Vol 10 (6) ◽  
pp. 2763-2777 ◽  
Author(s):  
Carmen P. Vega ◽  
Elisabeth Schlosser ◽  
Dmitry V. Divine ◽  
Jack Kohler ◽  
Tõnu Martma ◽  
...  
Keyword(s):  
High Resolution ◽  
Stable Isotope ◽  
Mass Balance ◽  
Temporal Variability ◽  
Ice Cores ◽  
Surface Mass Balance ◽  
Ice Shelf ◽  
Climate Signal ◽  
Surface Mass ◽  
Water Stable Isotope

Abstract. Three shallow firn cores were retrieved in the austral summers of 2011/12 and 2013/14 on the ice rises Kupol Ciolkovskogo (KC), Kupol Moskovskij (KM), and Blåskimen Island (BI), all part of Fimbul Ice Shelf (FIS) in western Dronning Maud Land (DML), Antarctica. The cores were dated back to 1958 (KC), 1995 (KM), and 1996 (BI) by annual layer counting using high-resolution oxygen isotope (δ18O) data, and by identifying volcanic horizons using non-sea-salt sulfate (nssSO42−) data. The water stable isotope records show that the atmospheric signature of the annual snow accumulation cycle is well preserved in the firn column, especially at KM and BI. We are able to determine the annual surface mass balance (SMB), as well as the mean SMB values between identified volcanic horizons. Average SMB at the KM and BI sites (0.68 and 0.70 mw. e. yr−1) was higher than at the KC site (0.24 mw. e. yr−1), and there was greater temporal variability as well. Trends in the SMB and δ18O records from the KC core over the period of 1958–2012 agree well with other previously investigated cores in the area, thus the KC site could be considered the most representative of the climate of the region. Cores from KM and BI appear to be more affected by local meteorological conditions and surface topography. Our results suggest that the ice rises are suitable sites for the retrieval of longer firn and ice cores, but that BI has the best preserved seasonal cycles of the three records and is thus the most optimal site for high-resolution studies of temporal variability of the climate signal. Deuterium excess data suggest a possible effect of seasonal moisture transport changes on the annual isotopic signal. In agreement with previous studies, large-scale atmospheric circulation patterns most likely provide the dominant influence on water stable isotope ratios preserved at the core sites.

Water exchange processes estimation in a temperate shallow lake based on water stable isotope analysis

2020 ◽  
Vol 56 (5-6) ◽  
pp. 465-479 ◽  
Author(s):  
Orlando Mauricio Quiroz Londoño ◽  
Asunción Romanelli ◽  
Daniel Emilio Martínez ◽  
Héctor Enrique Massone
Keyword(s):  
Stable Isotope ◽  
Stable Isotope Analysis ◽  
Shallow Lake ◽  
Water Exchange ◽  
Isotope Analysis ◽  
Exchange Processes ◽  
Water Stable Isotope

scholarly journals Geostatistical analysis and isoscape of ice core derived water stable isotope records in an Antarctic macro region

Polar Science ◽  
2017 ◽  
Vol 13 ◽  
pp. 23-32 ◽  
Author(s):  
István Gábor Hatvani ◽  
Markus Leuenberger ◽  
Balázs Kohán ◽  
Zoltán Kern
Keyword(s):  
Stable Isotope ◽  
Ice Core ◽  
Geostatistical Analysis ◽  
Water Stable Isotope

scholarly journals Snowfall and Water Stable Isotope Variability in East Antarctica Controlled by Warm Synoptic Events

2020 ◽  
Vol 125 (17) ◽  
Author(s):  
Aymeric P. M. Servettaz ◽  
Anais J. Orsi ◽  
Mark A. J. Curran ◽  
Andrew D. Moy ◽  
Amaelle Landais ◽  
...  
Keyword(s):  
Stable Isotope ◽  
East Antarctica ◽  
Water Stable Isotope

Spatiotemporal Patterns of Water Stable Isotope Compositions at the Shale Hills Critical Zone Observatory: Linkages to Subsurface Hydrologic Processes

2013 ◽  
Vol 12 (4) ◽  
pp. vzj2013.01.0029 ◽  
Author(s):  
Evan M. Thomas ◽  
Henry Lin ◽  
Christopher J. Duffy ◽  
Pamela L. Sullivan ◽  
George H. Holmes ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Critical Zone ◽  
Spatiotemporal Patterns ◽  
Hydrologic Processes ◽  
Critical Zone Observatory ◽  
Water Stable Isotope ◽  
Shale Hills

scholarly journals The Effects of Temperature on the Turnover of δ18O and δD in Juvenile Corn Snakes (Elaphe guttata): A Novel Study with Ecological Implications

Diversity ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 19
Author(s):  
Samuel Hirt ◽  
Kent Hatch
Keyword(s):  
Stable Isotope ◽  
Analysis Of Covariance ◽  
Environmental Research ◽  
Treatment Groups ◽  
University Of Utah ◽  
Effects Of Temperature ◽  
C 30 ◽  
Δ18o And Δd ◽  
Elaphe Guttata ◽  
Δd And Δ18o

The use of natural variation in stable isotope ratios continues to be used in ecological studies without proper validation through laboratory studies. This study tested the effects of temperature, time, and turnover in the scales of juvenile corn snakes (Elaphe guttata) in a controlled, laboratory environment. Snakes were assigned to four treatment groups (24 °C, 27 °C, 30 °C, and freely thermoregulating), and one snake from each group was sacrificed weekly. Scales from each snake were washed, dried, and analyzed for δD and δ18O at the Stable Isotope Research Facility for Environmental Research at the University of Utah. The effects of temperature on the turnover of tissues was only significant when comparing the thermoregulating group to the pooled treatment groups (24 °C, 27 °C, and 30 °C) in the δ18O of scales (p = 0.006). After normalizing data on the δD and δ18O using percent change for comparison, δ18O appeared to be turning over at a faster rate than δD as indicated by an analysis of covariance (ANCOVA) test for homogeneity of slopes (F1,53 = 69.7, p < 0.001). With further testing of assumptions, a modification of our methods could provide information on the composition of drinking water sources in a species that switches between two isotopically distinct sources, such as during seasonal shifts in habitat or migration, and/or estimates of long-term field metabolic rates based on the turnover of these isotopes.

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