Filters: Tags: Paleohydrology (X)
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Categories: Publication;
Types: Citation;
Tags: *Geophysical surveys,
*Glacier National Park,
*Lake McDonald,
*Lake sediments,
*Limnology,
Categories: Publication;
Types: Citation;
Tags: Archaeology,
Drainage Patterns,
Dunes,
Egypt, Arab Rep., Sinai Peninsula,
Egypt, Arab Rep., Sinai Peninsula,
ABSTRACT: Samples from 107 piñon pines (Pinns edulis) at four sites were used to develop a proxy record of annual (June to June) precipitation spanning the 1226 to 2001 AD interval for the Uinta Basin Watershed of northeastern Utah. The reconstruction reveals significant precipitation variability at interannual to decadal scales. Single-year dry events before the instrumental period tended to be more severe than those after 1900. In general, decadal scale dry events were longer and more severe prior to 1900. In particular, dry events in the late 13th, 16th, and 18th Centuries surpass the magnitude and duration of droughts seen in the Uinta Basin after 1900. The last four decades of the 20th Century also represent...
Categories: Publication;
Types: Citation;
Tags: Tree r,
drought,
paleohydrology,
time-series analysis
Categories: Publication;
Types: Citation;
Tags: ASFA 2: Ocean Technology Policy & Non-Living Resources; Ocea,
Calcium carbonates,
Carbonates,
Interglacial periods,
Palaeo studies,
Categories: Publication;
Types: Citation;
Tags: ASFA 2: Ocean Technology Policy & Non-Living Resources; Wate,
Alluvial deposits,
Geologic History,
Geomorphology,
Holocene,
Categories: Publication;
Types: Citation;
Tags: ASFA 2: Ocean Technology Policy & Non-Living Resources; Wate,
Africa, North,
Africa, Nubia,
Africa, Sahara Desert,
Africa, Sahara Desert,
Categories: Publication;
Types: Citation;
Tags: Detritus,
Erosion,
France, Franche-Comte, Doubs R.,
France, Franche-Comte, Doubs River Valley,
France, Jura,
This data release includes a table of concentrations (Sr, U) and radiogenic-isotope compositions (87Sr/86Sr, 234U/238U) for samples of modern lake water as well as a table of isotopic compositions (87Sr/86Sr and 234U/238U) for carbonate-rich samples from a 12.4-m-long composite core of lacustrine sediment from Lower Pahranagat Lake in southeastern Nevada, USA. Stratigraphic and geochronologic context for depths and ages of core material are also included here based on Bayesian age-depth modeling software (Bacon v. 2.2) published in a previous report (Theissen et al., 2019, https://doi.org/10.1017/qua.2019.11).
Categories: Publication;
Types: Citation;
Tags: Chemical Reactions,
Clay Minerals,
Equilibrium,
Groundwater,
Illite,
Categories: Publication;
Types: Citation;
Tags: 556.552,
556.555.2,
Atmospheric precipitations,
China, People's Rep.,
China, People's Rep., Qinghai Prov., Qinghai Hu L.,
Categories: Publication;
Types: Citation;
Tags: Biological Properties,
Climatic changes,
Closed Basins,
Closed Lakes,
Cores,
Holocene sediments at Emerald Lake in central Utah (3090 m a.s.l), document the paleohydroclimatic history of the western Upper Colorado River headwater region. Multi-proxy analyses of sediment composition, mineralogy, and stable isotopes of carbonate (d18O and d13C) show changes in effective moisture for the past ca. 10,000 years at millennial to decadal timescales. Emerald Lake originated as a shallow closed-basin cirque pond during the early Holocene. By ca. 7000 cal yr BP, higher lake levels and carbonate d18O values indicate rising effective moisture and higher proportions of summer precipitation continued at least until ca. 5500 cal yr BP when a landslide entered the lake margin. Between ca. 4500 and 2400...
Categories: Data;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Ecology,
Geomorphology,
Great Basin,
Holocene,
Hydrology,
Categories: Publication;
Types: Citation;
Tags: ASFA 1: Biological Sciences & Living Resources; ASFA 2: Ocea,
Algae,
Aquatic plants,
Arid environments,
Bacillariophyceae,
Categories: Publication;
Types: Citation;
Tags: SW 0835 Streamflow and runoff,
USA, Nevada, Nye Cty., Yucca Mt., Coyote Wash,
Water Resources Abstracts,
alluvial deposits,
detritus,
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