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26 results for “Buoyancy”
Argo-based ocean surface mixed layer depths using the buoyancy gradient definition of Whitt Nicholson and Carranza (2019)
<p>Argo-based mixed layer depth profiles derived from the CORA product as described in Whitt Nicholson Carranza. A binned 2-degree climatology was published previously:</p> <p>https://github.com/danielwhitt/globalimpacts_2019_whittetal/blob/master/MonthlyClimatology_ARGO_MLDbmax_TEOS10_Copernicus_PF_2000-2017_all_jun252019_nc.nc</p> <p>with:</p> <p>Whitt, D. B., Nicholson, S. A., & Carranza, M. M. (2019). Global Impacts of Subseasonal (< 60 Day) Wind Variability on Ocean Surface Stress, Buoyancy Flux, and Mixed Layer Depth. <em>Journal of Geophysical Research: Oceans</em>, <em>124</em>(12), 8798-8831</p> <p>Contact the authors with questions. </p> <p>The chosen mixed layer depth definition is the same as "HMXL", a standard output of the Community Earth System Model (CESM) ocean component.</p>
Buoyancy versus local stress field control on the velocity of magma propagation: insight from analog and numerical modelling, Supporting Data
<p>Experimental data and numerical codes used in the manuscript "Buoyancy versus local stress field control on the velocity of magma propagation: insight from analog and numerical modelling" by V. Pinel, S. Furst, F. Maccaferri and D. Smittarello.</p>
Buoyancy and Brownian motion of plastics in aqueous media: Predictions and implications for density separation and aerosol internal mixing state (Data Underlying Figures)
<p>Data underlying figures in A. Bain 'Buoyancy and Brownian motion of plastics in aqueous media: Predictions and implications for density separation and aerosol internal mixing state' RSC Environmental Science: Nano, 2022. </p> <p>CA = citric acid<br> NaCl = sodium chloride<br> AS = ammonium sulfate</p> <p>rho = difference in density (g/cm^3)<br> Rh = % relative humidity<br> radius is in micrometers<br> Pe0 are the calculated dimensionless Peclet numbers<br> </p>
Atmospheric Rivers Contribute to Summer Surface Buoyancy Forcing in the Atlantic Sector of the Southern Ocean
<p>These are the Wave glider data used in the analysis and creation of figures in Edholm et al. 2022: <em>Atmospheric Rivers Contribute to Summer Surface Buoyancy Forcing in the Atlantic Sector of the Southern Ocean</em> in support of open-code, transparency, and repeatability.</p> <p>Abstract:</p> <p>Atmospheric rivers (ARs) dominate moisture transport globally; however, it is unknown what impact ARs have on surface ocean buoyancy. This study explores the surface buoyancy gained by ARs using high-resolution surface observations from a Wave Glider deployed in the subpolar Southern Ocean (54°S, 0°E) between 19 December 2018 and 12 February 2019 (55 days). When ARs combine with storms, the associated precipitation is significantly enhanced (189%). In addition, the daily accumulation of AR-induced precipitation provides a buoyancy gain to the surface ocean equivalent to warming by surface heat fluxes. Over the 55 days, ARs accounted for 47% of the total precipitation equating to 10% of the summer surface ocean buoyancy gain. This study indicates that ARs play an important role in the summer precipitation over the subpolar Southern Ocean and that they can alter the upper-ocean buoyancy budget from synoptic to seasonal timescales.</p>
Processed ERA5, IMERG and TRMM PR/GPM DPR precipitation data for Nicolas & Boos - "Understanding the spatiotemporal variability of tropical orographic rainfall using convective plume buoyancy."
<p>The dataset contains processed data from large datasets that are freely available online. <br>All data cover the period 01/2001 - 12/2020. The file names describe the months & region that each file contains. Variable codes for ERA5 data (all files starting in e5.) are:</p><p> - 228_246_100u : 100m u-wind<br> - 228_247_100v : 100m v-wind<br> - qL : 900-600hPa averaged specific humidity<br> - thetaeb : surface - 900hPa averaged equivalent potential temperature<br> - thetaeL : 900-600hPa averaged equivalent potential temperature<br> - thetaeLstar : 900-600hPa averaged saturation equivalent potential temperature<br> - tL : 900-600hPa averaged temperature<br> - uBL : surface - 900hPa averaged u wind<br> - vBL : surface - 900hPa averaged v wind<br> - 128_034_sstk : sea surface temperature<br> - 162_071_viwve : eastward component of vertically integrated water vapor transport<br> - 162_072_viwvn : northward component of vertically integrated water vapor transport</p><p> </p>
Buoyancy Waves in Earth's Nightside Magnetosphere: Normal-Mode Oscillations of Thin Filaments
<ul> <li>A theory has been developed for small oscillations of a thin filament in the magnetosphere.</li> <li>For the lowest-frequency even modes, the eigenfunctions are essentially buoyancy waves in the plasma sheet, but they are more like slow modes in the inner magnetosphere.</li> <li>For the lowest-frequency even modes, the eigenfrequencies (radians/s) have peak values of approximately 0.07 s<sup>-1</sup> between the inner plasma sheet and plasmapause, for an average magnetospheric field. </li> <li>This includes software and model data used in this paper.</li> <li>Submitted to JGR for review</li> </ul>
Observational Signatures of Tightly Wound Spirals Driven by Buoyancy Resonances in Protoplanetary Disks
<p>These are simulated CO data cubes presented in "Observational Signatures of Tightly Wound Spirals Driven by Buoyancy Resonances in Protoplanetary Disks" by Bae, Teague and Zhu. They represent simulated 12CO and 13CO ALMA observations using the standard model (see Section 3.1.1 of the paper), with three different planet masses (0.5, 1, and 2 Jupiter-mass) and five different disk inclination values (5, 15, 30, 45, and 60 degrees).</p>
Buoyancy-driven exhumation of lawsonite-bearing eclogites and blueschists in the Lanling area, central Qiangtang Terrane, Tibetan Plateau
<p>All these data tables are used to suport to manuscript, titled "Buoyancy-driven exhumation of lawsonite-bearing eclogites and blueschists in the Lanling area, central Qiangtang Terrane, Tibetan Plateau".</p>
The role of bottom friction in mediating the response of the Weddell Gyre circulation to changes in surface stress and buoyancy fluxes
<p>This repository contains code to reproduce the figures in the paper titled "The role of bottom friction in mediating the response of the Weddell Gyre circulation to changes in surface stress and buoyancy fluxes" published in the Journal of Physical Oceanography (DOI: <a href="https://doi.org/10.1175/JPO-D-23-0165.1">https://doi.org/10.1175/JPO-D-23-0165.1</a>), as well as the barotropic vorticity budget terms for each of simulation in the paper.</p>
caneill et al. The polar transition from alpha to beta regions set by a surface buoyancy flux inversion.
<p>NEMO outputs used for the paper Caneill, R., Roquet, F., Madec, G., and Nycander, J. (2022). The polar transition from alpha to beta regions set by a surface buoyancy flux inversion. Journal of Physical Oceanography.</p> <p><a href="https://doi.org/10.1175/JPO-D-21-0295.1">https://doi.org/10.1175/JPO-D-21-0295.1</a></p> <p>Abstract:</p> <p>The stratification is primarily controlled by temperature in subtropical regions (alpha-ocean), and by salinity in subpolar regions (beta-ocean). Between these two regions lies a transition zone, often characterized by deep mixed layers in winter and responsible for the ventilation of intermediate or deep layers. While of primary interest, no consensus on what controls its position exists yet. Amongst the potential candidates, we find the wind distribution, air-sea fluxes or the nonlinear cabbeling effect. Using an ocean general circulation model in an idealized basin configuration, a sensitivity analysis is performed testing different equations of state. More precisely, the thermal expansion coefficient (TEC) temperature dependence is explored, changing the impact of heat fluxes on buoyancy fluxes in a series of experiments. The transition zone is found to be located at the position where the sign of the surface buoyancy flux reverses to become positive, in the subpolar region, while wind or cabbeling are found of secondary importance. This inversion becomes possible because the TEC is reducing at low temperature, enhancing in return the relative impact of freshwater fluxes on the buoyancy forcing at high latitudes. When the TEC is made artificially larger at low temperature, the freshwater flux required to produce a positive buoyancy flux increases and the transition zone moves poleward. These experiments demonstrate the important role of competing heat and freshwater fluxes in setting the position of the transition zone. This competition is primarily influenced by the spatial variations of the TEC linked to meridional variations of the surface temperature.</p> <p> </p> <p>Download data:</p> <p>Due to their large size, the data have been split into multiple zip files. To extract them, follow the following commands:</p> <pre><code class="language-bash">zip -s 0 EXP_main.zip --out out.zip unzip out.zip</code></pre> <p> </p>
Research data supporting "Buoyancy-Driven Gradients for Biomaterial Fabrication and Tissue Engineering"
<p>Research data supporting the publication:</p> <p>Li C. et al., Advanced Materials, 2019, DOI: 10.1002/adma.201900291</p>
Model data repository of "The role of sediment accretion and buoyancy on subduction dynamics and geometry"
<p>This dataset contains the code and data used in Brizzi et al. (2021): The role of sediment accretion and buoyancy on subduction dynamics and geometry</p>
The evolvement of ULVZ at LLSVP margins--selected models with various buoyancy number and compositional viscosity
<p>This tar.gz file is created and uploaded for the submission of the manuscript titled '<em>The evolvement of dense ULVZs at LLSVP margins and implications</em>' to the journal <em>Geophysical Research Letters</em>.</p> <p>This tar.gz file is for selected models with various buoyancy number (B) and compositional viscosity (etaC), which are described and compared with the reference model (in doi 10.5281/zenodo.8394637) in the manuscript. The collection includes the raw output data and post-processed data illustrated in Figures 3. </p> <p>1. the /scratch directory</p> <p>This directory contains the raw output data of three models listed below. All models are calculated by CitcomS (modified from the CitcomS-3.3.1 version) and the data follows the CitcomS output convention. Please read the description of a previous upload (doi 10.5281/zenodo.8394637, titled 'The evolvement of ULVZ at LLSVP margins--reference model with B=3.0 and etaC=1.0') for more information.</p> <p>The ULVZ-v1B6_h10l10/ directory: the model with B=6.0 and etaC=1.0, illustrated in the top panel of Figure 3 </p> <p>The ULVZ-v1B1-5_h10l10/ directory: the model with B=1.5 and etaC=1.0, illustrated in the middle panel of Figure 3 </p> <p>The ULVZ-v01B3_h10l10/ directory: the model with B=3.0 and etaC=0.1, illustrated in the bottom panel of Figure 3 </p> <p>2. the data_plots/ directory: data extracted from the raw outputs and plotted in Figure 3.</p> <p>The time frame of 14800 is for the left column in Figure 3, and the other time frames are for the right column in Figure 3. </p> <p>temperature: *temp* files</p> <p>composition: *comp* files</p> <p>velocity: *velo_Sv* files</p> <p>density anomaly: *density* files</p>
Dataset for Two-Point Mixing, Buoyancy Sorting and Updraft Dilution in the RACORO Campaign, Wei et al., 2020
<p>Dataset for Two-Point Mixing, Buoyancy Sorting and Updraft Dilution in the RACORO Campaign, Wei et al., 2020 on Geophysical Research Letters</p>
Replication Data for: ``Toward machine learning-augmented, bathymetry-aware parameterizations of mesoscale eddy buoyancy fluxes across upwelling slope fronts''
<p>This dataset contains the Python scripts for training the Artificial Neural Networks (ANNs), the trained ANNs, configuration files for the reference 2D MITgcm simulations, and model outputs used in the paper.</p>
50% Body Weight Reverses Stature, Lumbar Disc Expansion and Vertebral Compliance by Hyper-Buoyancy Floatation.
ClinicalTrials.gov study NCT05590754. IPD Sharing: NO. Countries: 2. Publications: 4.
Cervical Changes by 4h of Hyper-buoyancy Flotation and Followed by 15 Mins 1g Re-loading
ClinicalTrials.gov study NCT05296200. IPD Sharing: NO. Countries: 1. Publications: 4.
Data from: Dynamic sinking behaviour in marine phytoplankton: rapid changes in buoyancy may aid in nutrient uptake
Open the record for dataset details and reuse information.
Data from: Buoyancy mechanisms limit preservation of coleoid cephalopod soft tissues in Mesozoic Lagerstätten
Coleoid cephalopods are characterized by internalization of their shell, and are divided into the ten-armed Decabrachia (squids and cuttlefish) and the eight-armed Vampyropoda (octopuses and vampire squid). They have a rich fossil record predominantly of the limited biomineralized skeletal elements they possess: arm hooks, statoliths, mouthparts (the buccal mass) and internal shell (gladius or pen), although exquisitely preserved soft tissue coleoids are known from several Lagerstätten worldwide. Recent studies have shown that although morphological similarities between extant decabrachian gladii and fossil examples exist, no known examples of fossil decabrachians are currently known. However, molecular clock data and phylogenetic bracketing suggest that they should be present in Lagerstätten that are rich in vampyropod soft tissue fossils (i.e. Hâkel and Hâdjoula Lagerstätten, Cretaceous, Lebanon). We propose that a hitherto unknown taphonomic bias pertaining to the differing methods of buoyancy control within coleoid groups limits preservation potential. Both negatively and neutrally buoyant decabrachians use chemical buoyancy control (ammonia) whereas vampyropods do not. In the event of rapid burial in an environment conducive to exceptional preservation, ammonia dramatically decreases the ability of the decabrachian carcass to generate the required pH for authigenic calcium phosphate replacement, limiting its preservation potential. Moreover, the greater surface area and comparatively fragile dermis further decrease the potential for fossilization. This taphonomic bias may have contributed to the lack of preserved labile soft-tissues in other cephalopods groups such as the ammonoids.
Data from: Active buoyancy adjustment increases dispersal potential in benthic marine animals
1. While the study of dispersal and connectivity in the ocean typically centers on pelagic species and planktonic larval stages of benthic species, the present work explores an overlooked locomotor means in post-settlement benthic stages that redefines their dispersal potential. 2. Members of the echinoderm class Holothuroidea colonize a diversity of marine environments worldwide, where they play key ecological and economical roles, making their conservation a priority. Holothuroids are commonly called sea cucumbers or sea slugs to reflect their slow movements and are assumed to disperse chiefly through pelagic larvae. 3. The present study documents and explores their unexpected ability to actively modify their buoyancy, leading them to tumble or float at speeds orders of magnitudes faster than through benthic crawling. Two focal species representing different taxonomic orders, geographic distributions and reproductive strategies were studied over several years. 4. Active buoyancy adjustment (ABA) was achieved through a rapid increase in seawater to flesh ratio by up to 740%, leading to bloating, and simultaneously detachment from the substrate. It occurred as early as 6 months post settlement in juveniles and was recorded in wild adult populations. In experimental trials, ABA was triggered by high conspecific density, decreasing salinity and increasing water turbidity. Based on field video footage, ABA-assisted movements generated speeds of up to 90 km d-1. 5. These findings imply that displacement during planktonic larval stages may not supersede the locomotor capacity of benthic stages, challenging the notion of sedentarity. Combining the present results and anecdotal reports, ABA emerges as a generalized means of dispersal among benthic animals, with critical implications for worldwide management and conservation of commercially and ecologically significant species.
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