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Showing 1 to 20 of 21 for “"closed basin"”.
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Strandline and Sediment Analysis of Stump Lake Area, Nelson County, North Dakota
… late glacial and Recent history of Stump Lake, a closed basin lake, in Helson County, North Dakota, T. 151 N., R. 60 W. (see fig . 1). The work was started as a summer project under a National Science Foundation Undergraduate Research Participation Program and completed for credit in Geologic …
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Lake Magadi and the Soda Lake cycle: a study of the modern sodium carbonates and of Late Pleistocene and Holocene lacustrine core sediments
<p>The Magadi Basin, Kenya, within the East African Rift Valley, contains two closed-basin alkaline lakes, Lake Magadi and Nasikie Engida that now precipitate trona (Na2CO3.NaHCO3.2H2O) and nahcolite (NaHCO3). Observations of the conditions of modern trona and nahcolite deposition in the Magadi …
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Solute Chemistry and Isotopic Investigation of the Groundwater Flow Paths in Honey Lake Basin, Lassen County, California and Washoe County, Nevada
<p>Honey Lake Basin is a large, hydrologically closed valley with two playa lakes that are separated by a low elevation sill. The Basin has a complex hydrogeologic setting, with numerous groundwater flow paths that interact with surface waters and three basic aquifers; shallow, deep, and …
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Tufa-based reconstructions of Huasco Basin Lake levels
… applied to examine the past hydrology of the basin. The Salar del Huasco was found to have remained a hydrologically closed basin during highstand events, meaning lake level variations within the basin are purely driven by local precipitation-evaporation balances. Furthermore, the preliminary …
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The surface of Mars : morphology and process
… relatively smooth, but neither region forms a closed basin. Mars' slope distribution is longer tailed than those of Earth and Venus, indicating a lower efficiency of planation processes relative to relief-building tectonics and volcanics. The shallower long-wavelength portion of the lowlands' …
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Stability of large-scale oceanic flows and the importance of non-local effects
… which are found on both sides of most ocean basins because of the presence of continents. A linear stability analysis of a meridional boundary current on the beta-plane is performed using a quasi-geostrophic model in order to determine the existence of radiating instabilities, a type of …
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Deep-lake carbonates and speleothems as high-resolution archives of paleohydrology in the Bonneville Basin, UT
… precisely dated records from the Bonneville Basin, a large basin in the eastern U.S. Great Basin. This region is known to have been highly sensitive to hydroclimate changes during the past glacial period; closed-basin lakes in this region have been studied for over a century. We present lake …
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Climatic Controls on the Porewater Chemistry of Mid-continental Wetlands
… detailed geoelectrical survey of a well-studied, closed-basin prairie wetland (P1) in the CLSA that has experienced record drought and heavy rains (i.e. deluge) during the late 20th century. Subsurface storage of sulfate (SO4) salts allows many such closed-basin prairie wetlands to maintain …
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U-Th Dating of lacustrine carbonates
… Here, the tufas originate from a transect of closed-basin lakes in the central Andes of northern Chile. With improved sample selection and leveraging of the incontrovertible constraints of stratigraphy and coevality, we are able to test the validity of U-Th data. Combining quality-controlled …
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Stability of large-scale oceanic flows and the importance of non-local effects
… which are found on both sides of most ocean basins because of the presence of continents. A linear stability analysis of a meridional boundary current on the beta-plane is performed using a quasi-geostrophic model in order to determine the existence of radiating instabilities, a type of …
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Remote sensing assessment of rapidly changing lake areas in semi-arid closed basins : modern playa lake response to meteorological variability and implications for pluvial Lake Palomas Holocene highstands
Closed basin lakes provide important data on paleo- and modern environmental conditions because of their sensitivity to climate variability, particularly variations in precipitation. In arid and semi-arid regions throughout the world, playas play an important role in biological communities, …
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Water Level Quantiles Of Devils Lake Under Down-Scaled Gcm Predictions Using A Coupled Hydro-Climatic Model
… from the terminal lake. Future hydrology of the basin and lake levels of Devils Lake are simulated using the weather samples obtained from several downscaled GCM runs under varying scenarios due to anthropogenic modifications and the resulting composition of the atmosphere. 100 traces of future …
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Response of semi-permanent prairie wetland to climate change: a spatial simulation model
… a nearly balanced cover ratio to a completely closed basin with no open water areas.
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The impacts of thermokarst activity on a stream in the McMurdo Dry Valleys
… ephemeral glacial runoff streams which feed the closed basin perennially ice covered lakes. The upland zones of the Dry Valleys have been shown to have some of the slowest ground surface change rates in the world. However, recent observations in the coastal valley transition zones suggest that …
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A Reconstruction of Precipitation and Hydrologic Variability on the Peruvian and Bolivian Altiplano During the Late Quaternary
… for much of the precipitation over the Amazon basin and the southern subtropics. Over long timescales moisture on the Altiplano fluctuates in intensity due to changes in precessional insolation forcing as well as teleconnections to decadal-to-millennial scale abrupt temperature shifts in the …
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Representation of eddies in climate models by a potential vorticity flux
… are explored in the context of an eddy-resolving closed basin flow which breaks the zonal symmetry. Decomposition of eddy PV fluxes into components associated with advective and dissipative effects suggest that the component associated with eddy flux divergence, and therefore forcing of the mean …
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Representation of eddies in climate models by a potential vorticity flux
… are explored in the context of an eddy-resolving closed basin flow which breaks the zonal symmetry. Decomposition of eddy PV fluxes into components associated with advective and dissipative effects suggest that the component associated with eddy flux divergence, and therefore forcing of the mean …
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Box models of thermohaline circulation
… the transport of buoyancy and tracer through a closed basin with buoyancy fluxes supplied at the top and bottom boundaries and, in both chapters, we compare the two cases in which the mixing either occurs uniformly across the tank or is locally confined to one portion. In chapter 2 we establish …
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The sensitivity and predictability of mesoscale eddies in an idealized model ocean
… of the mean and mesoscale eddy fields in a closed-basin ocean model. The resulting techniques provide a more accurate description of the local dynamics, origins, and parametric dependences of the eddies than that available in previous modelling studies. First, we propose a novel and highly …
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Effects of Anthropogenic Urea on Lakes of the North American Great Plains: Ecological Implications Based on Experimental and Observational Studies
… for ~90% of total dissolved N in a survey of 69 closed basin lakes, suggesting that urea is ubiquitous in regional lakes. These findings suggest a new model for the regulation of the urea in lakes in which land use practices regulate lotic influx, stimulate regeneration from lake sediments, and …
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