نتایج جستجو برای: isotope hydrology
تعداد نتایج: 39399 فیلتر نتایج به سال:
Although early studies of streamwater residence time included the use of stable isotopes (deuterium, oxygen-18) and tritium, work in the last decades has largely relied on stable isotopes (or chloride) alone for residence time determination, and derived scaling relations at the headwater and mesoscale watershed scale. Here, we review critically this trend and point out a significant issue in ou...
Analyses of sediment cores from Jellybean Lake, a small, evaporation-insensitive groundwater-fed lake, provide a record of changes in North Pacific atmospheric circulation for the last ̈7500 yr at 5to 30-yr resolution. Isotope hydrology data from the southern Yukon indicate that the oxygen isotope composition of water from Jellybean Lake reflects the composition of mean-annual precipitation, y1...
Iso-Wetlands is a new, NERC-funded collaborative research project involving researchers at UCL Institute of Archaeology, the University Leeds and UK Centre for Ecology Hydrology. The developing sulfur isotope analysis archaeological plants animals as new tool exploring hydrological conditions under which agricultural production was taking place. This development has potential to improve underst...
The utility of stable oxygen isotope analysis for demonstrating human migration has been developed and demonstrated on archaeological human populations. The application of this approach to tracking human movement has seldom been applied within forensic science. This paper gives results from a stable oxygen isotope assessment of extant modern human and horse enamel 18O values recovered from toot...
Monteverde, Costa Rica harbors montane forests that exemplify the delicate balances among climate, hydrology, habitat, and development. Most of the annual precipitation to this region arrives during the wet season, but the importance of orographic precipitation during the dry and transitional seasons should not be underestimated. Development associated with ecotourism has put significant stress...
Stable isotopes of water have long been used to improve understanding of the hydrological cycle, catchment hydrology, and polar climate. Recently, there has been increasing interest in measurement and use of the lessabundant O isotope in addition to H and O. Off-axis integrated cavity output spectroscopy (OA-ICOS) is demonstrated for accurate and precise measurements δO, δO, and O-excess in liq...
Fraction of young water (Fyw) and mean transit time (MTT, τ¯) calculated from isotope profiles are valuable information for catchment hydrological assessment, especially in anthropogenically impacted region where natural conditions may not be decisive to hydrology. The calculation Fyw MTT were performed on three subsets δ18O_H2O data collected at the Hanoi meteo-hydrological station, Red River,...
Introduction ............................................................................................................................................................1 Rainfall and Runoff Characteristics for Urban Areas .............................................................................................2 Small Storm Hydrology.............................................................
Abstract The Willandra Lakes region is a series of once interconnected and now-dry lake basins in the arid zone southeastern Australia. It UNESCO World Heritage Site cultural, archaeological, geological significance, preserving records Aboriginal occupation environmental change stretching back to at least 50 ka. Linking archaeology with commensurate palaeoenvironmental information complicated b...
Background: This study aimed to evaluate the reaction of organism of laboratory animals on deuterium-depleted drinking diet. To assess the cell energy metabolism, the effect of a liquid medium with different deuterium contents on isolated liver mitochondria of random bred rats and Wistar rats was studied. Methods: This experimental study on the effect of deuterium-depleted drinking water (DDW) ...
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