Modeled and measured greenhouse gas emissions from Lake Powell and bathymetric analysis of tributary littoral habitat at different water levels

This data release contains model inputs used to estimate surface water greenhouse gas fluxes from two large arid reservoirs, Lake Powell and Lake Mead. The release also contains empirical, spatially explicit water quality and greenhouse gas data from a single field survey conducted in Lake Powell in July of 2017. Finally, this release contains surface area estimates of shallow (< 15m) tributary regions of Lake Powell under different water level scenarios.

Tags: 2d area, 3d area, Arizona, GHG Reservoir Tool, Lake Powell, All tags... Limnology, USGS Science Data Catalog (SDC), Utah, Water Quality, Water Resources, air temperature, arid environments, available literature, bathymetry, bathymetry data, bathymetry measurement, calcium, carbon dioxide, catchment areas, catchment runoff, chemical data, chorophyll a, desert southwest, direct measurements, dissolved oxygen, dissolved oxygen, elevation, emission estimates, floating chamber, generalized linear model, global models, greenhouse gases, inlandWaters, limnological data, limnology, littoral tributary surface area, mean monthly air temperature, methane, methane emissions, multiple linear regression model, net primary productivity, nitrogen, nutrient content (water), nutrient data, oxygen content (water), pH, phosphorus, regression analysis, reservoir characteristics, reservoir surface area, reservoirs, runoff, shallow tributary area, size productivity model, surface area, surface volume, temperature, topography, turbidity, volume, water chemistry, water depth, water intake depth, water levels, water pH, water properties, water quality, water sampling, water temperature, Fewer tags

Aeolian activity at a giant sandstone weathering pit in arid south-central Utah

Aeolian abrasional, depositional and deflational features indicate exceptionally strong southwesterly winds in a giant sandstone weathering pit in Grand Staircase Escalante Monument, about 22 km southeast of Escalante, Utah. The 60 m wide, 5?20 m deep pit has developed near the summit of a broad, barren 160-m-high dome on the Lower Jurassic Navajo Sandstone. Unlike other giant weathering pits (10?30 m diameter) in the region, the bedrock floor of this pit is undulatory, and there is a cylindrical, 10-m-high rock pedestal in the centre of the pit. An active dune surrounds the central pedestal and at times has as much as 8 m of local relief. The dune shifts considerably over brief (<1 year) periods of time. Fine-grained...

Categories: Publication; Types: Citation, Journal Citation; Tags: Earth Surface Processes and Landforms, Navajo Sandstone, aeolian processes, arid environments, weathering pit, All tags... wind abrasion, Fewer tags