Top 3 Eartharxiv Papers Today in Physical Sciences And Mathematics


2.003 Mikeys
#1. Effects of turbulent hyporheic mixing on reach-scale transport
Kevin, Angang Li, Diogo Bolster, Gregory J Wagner, Aaron I Packman
Turbulence causes rapid mixing of solutes and fine particles between open channel flow and coarse-grained streambeds. Turbulent mixing is known to control hyporheic exchange fluxes and the distribution of vertical mixing rates in the streambed, but it is unclear how turbulent mixing ultimately influences mass transport at the reach scale. We used a particle-tracking model to simulate local- and reach-scale solute transport for a stream with coarse-grained sediments. Simulations were first used to determine profiles of vertical mixing rates that best described solute concentration profiles measured within a coarse granular bed in flume experiments. These vertical mixing profiles were then used to simulate a pulse solute injection to show the effects of turbulent hyporheic exchange on reach-scale solute transport. Experimentally measured concentrations were best described by simulations with a non-monotonic mixing profile, with highest mixing at the sediment-water interface and exponential decay into the bed. Reach-scale simulations...
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Kevin_R_Roche: First #PrePrint adventure was an easy one, thanks to those who have made @EarthArXiv an open data reality. See our new experimental/modeling study that shows how turbulent mixing and high #hyporheiczone velocities impact reach-scale solute transport. https://t.co/I7lAuHUdyu
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1.994 Mikeys
#2. Preprint: Dataset of global extreme climatic indices due to an acceleration of ice sheet melting during the 21st century
Dimitri Defrance
This article describes extreme indices maps (Data Cube, raster X Time) for different scenarios with a more important contribution to the sea level rise from Greenland and/or Antarctica during the 21st century under the Representative Concentration Pathway (RCP) 8.5 emission scenario. The indices are produced annually and globally with a resolution of 0.5°X0.5° from 1951 to 2099. The data were generated by simulating daily maximum and minimum temperature and precipitation from the IPSL-CM5A-LR model from Coupled Model Intercomparison Project Phase 5 (CMIP5). These climatic data are unbiased and downscaled to the 0.5°x0.5 scale with the the Cumulative Distribution Function transform (CDFt) and EWEMBI dataset compiled to support the bias correction of climate input data for ISIMIP. Finally, each extreme indice is compute on the unbiased data on each grid cell on all continents. These data are available at http://dx.doi.org/10.17632/fbsdj87gjg.1 .
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Authors: 1
Total Words: 2420
Unqiue Words: 963

1.993 Mikeys
#3. Agriculture-aquaculture transitions on the lower Ganges-Brahmaputra Delta, 1972-2017
Daniel Sousa, Christopher Small
Recent decades have seen a considerable increase in shrimp aquaculture in tropical and subtropical developing countries. This practice is controversial due to its potential for serious economic, food security, and environmental impacts. Of particular concern is the widespread practice of intensive aquaculture in and near mangrove ecosystems where many shrimp species spawn. However, while considerable effort has been directed toward understanding the effects of aquaculture, consistent and objective estimates of its past and present spatial extent are lacking. This is in part because of the challenge of distinguishing aquaculture ponds (ghers) from other types of standing water using satellite imagery. In this work, we use visible and infrared satellite imagery to map past and present extent of standing water areas on the lower Ganges-Brahmaputra Delta (GBD), one of the largest and most expansive areas of recent aquaculture growth on Earth. Spatial extent and expansion of aquaculture on the lower GBD are of particular interest...
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Total Words: 8942
Unqiue Words: 2688

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