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49 results for “Gyres”
North Pacific Subtropical Gyre RCLV Atlas (Version 2)
<p>This dataset tracks Rotationally Coherent Lagrangian Vortices (RCLVs) at an 8-day resolution in the North Pacific Subtropical Gyre region around Hawai’i. The ‘lat’ and ‘lon’ variables represent the center coordinates of the vortex, or the extremum of integrated relative vorticity. The contour boundaries demark the edge of the RCLV based on 32-day backward-in-time Lagrangian trajectories. In other words, eddies in this dataset represents a fluid mass of substantial size that was coherent for at least 32 days. The fluid masses are tracked through time to assign IDs and RCLV ages. The software used to generate the dataset is publicly available at https://github.com/lexi-jones/RCLVatlas (DOI: <a href="https://doi.org/10.5281/zenodo.7702978" target="_blank" rel="noopener noreferrer">10.5281/ZENODO.7702978</a>).</p> <p>Version 1 of the dataset (https://simonscmap.com/catalog/datasets/RCLV_atlas; DOI: <a href="https://doi.org/10.5281/zenodo.8139149" target="_blank" rel="noopener noreferrer">10.5281/ZENODO.8139149</a>) only includes contours that represent features of age 32 days or older. Version 2 extends the dataset to include eddy genesis by advecting the particle sets backward-in-time to age 24, 16, and 8 days.</p>
Shipborne ADCP data in the Thwaites Gyre region, 2019
<p>This dataset contains the velocity profiles in the Thwaites Gyre region collected by the shipborne Acoustic Doppler Current Profiler (ADCP) onboard RV Nathaniel B Palmer in 2019 under the project Thwaites-Amundsen Regional Survey and Network Integrating Atmosphere-Ice-Ocean Processes (TARSAN). Ocean current velocities over the upper 980 m of the water column were obtained using a 75 kHz Ocean Surveyor (OS75) and a 38 kHz Ocean Surveyor (OS38) shipboard Acoustic Doppler Current Profiler (sADCP). Common Ocean Data Access System (CODAS) processing has been run to generate the NetCDF files. The authors made additional quality control including, 1. removing data with velocity values higher than 0.6 m/s and other obvious outliners, and 2. removing data below 400 m for OS75 and data below 760 m for OS38 as the last several levels in the velocity profiles are believed to be potentially affected by the water turbidity and bubbles passing below the sADCP etc. The data are stored in .txt format and .mat MATLAB format.</p>
Diel-regulated transcriptional cascades of microbial eukaryotes in the North Pacific Subtropical Gyre
<p>Trinity <em>de novo </em>assemblies of 24 poly-A+ selected, combined-replicate metatranscriptomes from HOE-Legacy 2 cruise KM1513 (Jul 24 - Aug 6, 2015). KM1513 cruise information, plots, and associated environmental data for the HOE Legacy II cruise can be found online at <a href="http://hahana.soest.hawaii.edu/hoelegacy/hoelegacy.html">http://hahana.soest.hawaii.edu/hoelegacy/hoelegacy.html</a>. Raw metatranscriptome short-read sequence data is available in the NCBI Sequence Read Archive under BioProject ID PRJNA492142. Code associated with this project is available on Github (<a href="https://github.com/armbrustlab/diel_eukaryotes">https://github.com/armbrustlab/diel_eukaryotes</a>).</p> <p> </p> <p> </p>
Data from" Euphotic Zone Metabolism in the North Pacific Subtropical Gyre Based on Oxygen Dynamics"
<p>This data set provides measurements of oxygen to argon molar ratios from discrete samples collected within the mixed layer at the long-term sampling site (Station ALOHA) of the Hawaii Ocean Time-Series program, within the North Pacific Subtropical Gyre, between November 2013 and January 2019 (near-monthly cruises). Samples were measured by membrane inlet mass spectrometry following Ferrón et al. (2015). Version 2 had corrected longitude data (in decimal degrees east). Version 3 includes a new file with estimated rates of net community production, gross oxygen production and community respiration for the mixed layer.</p>
Supplementary datasets and code for: Instability and mesoscale eddy fluxes in an idealized 3-layer Beaufort Gyre
<p>This dataset contains the configuration files and scripts used to initialise the Aronnax simulations described in the manuscript; processed output from the simulations; and code used for the linear stability analysis. </p>
Dataset: Gyre Therapeutics, Inc. (GYRE) Stock Performance
This dataset provides historical stock market performance data for specific companies. It enables users to analyze and understand the past trends and fluctuations in stock prices over time. This information can be utilized for various purposes such as investment analysis, financial research, and market trend forecasting.
A Hard Day's Night: Diel shifts in microbial eukaryotic activity in the North Pacific Subtropical Gyre
<p><strong>A Hard Day’s Night: Diel shifts in microbial eukaryotic activity in the North Pacific Subtropical Gyre </strong>(<em>submitted</em>)</p> <p><strong>Authors: </strong>Sarah K. Hu<sup>1</sup>*, Paige E. Connell<sup>1</sup>, Lisa Y. Mesrop<sup>1</sup>, & David A. Caron<sup>1</sup></p> <p><sup>1</sup>University of Southern California, Biological Sciences, Los Angeles, CA, USA</p> <p> </p> <p><strong>Abstract</strong></p> <p>Molecular analysis revealed diel rhythmicity in the metabolic activity of single-celled microbial eukaryotes (protists) at station ALOHA in the North Pacific Subtropical Gyre. Diel trends among different protistan taxonomic groups reflected distinct nutritional capabilities and temporal niche partitioning. Changes in relative metabolic activities among phototrophs corresponded to the light cycle, generally peaking in mid- to late-afternoon. Metabolic activities of protistan taxa with phagotrophic ability were higher at night, relative to daytime, potentially in response to increased availability of picocyanobacterial prey. Tightly correlated Operational Taxonomic Units throughout the diel cycle implicated the existence of parasitic and mutualistic relationships within the microbial eukaryotic community, underscoring the need to define and include these symbiotic interactions in marine food web descriptions. This study provided a new high-resolution view into the ecologically important interactions among primary producers and consumers that mediate the transfer of carbon to higher trophic levels. Characterizations of the temporal dynamics of protistan activities contribute knowledge for predicting how these microorganisms respond to environmental forcing factors.</p> <p> </p> <p><a href="https://github.com/shu251/18Sdiversity_diel">See github for additional information on data analysis.</a></p>
Data for "Temporal and vertical variability in phytoplankton primary production and microbial community respiration in the North Pacific Subtropical Gyre"
<p>This ALOHA_GOP&R.xslx data set provides measurements of biological rates conducted between April 2015 and July 2020 at different depths in the euphotic zone at or in the vicinity of Station ALOHA (22° 45' N, 158° W), the long-term sampling site of the Hawaii Ocean Time-series (HOT) program, within the North Pacific Subtropical Gyre. </p> <p>The file ALOHA_GOP&R.xslx contains incubation-based measurements of gross oxygen production and community respiration that were measured in the same incubation bottles by applying the <sup>18</sup>O-water method and tracking net changes in oxygen to argon ratios during dawn to dusk in situ incubations, following Ferrón et al. (2016). The samples were measured using membrane inlet mass spectrometry. Rates were measured at 6 depths within the euphotic zone: 5, 25, 45, 75, 100, 125 m, except in a few occasions in which there were no measurements made at 125 m.</p> <p>Data description</p> <table> <tbody> <tr> <td> <p>Variable</p> </td> <td> <p>Description</p> </td> <td> <p>Units</p> </td> </tr> <tr> <td> <p>Date </p> </td> <td> <p>Date of sampling and start of incubation (UTC -10 hours)</p> </td> <td> <p> </p> </td> </tr> <tr> <td> <p>Cruise ID</p> </td> <td> <p>Cruise identification</p> </td> <td> <p>#</p> </td> </tr> <tr> <td> <p>Latitude</p> </td> <td> <p>Latitude</p> </td> <td> <p>degrees N</p> </td> </tr> <tr> <td> <p>Longitude</p> </td> <td> <p>Longitude</p> </td> <td> <p>degrees E</p> </td> </tr> <tr> <td>Stn ALOHA </td> <td>Whether the data are from Station ALOHA (yes/no)</td> <td> </td> </tr> <tr> <td>IncT</td> <td> <p>Incubation time</p> </td> <td> <p>hours</p> </td> </tr> <tr> <td> <p>Depth</p> </td> <td>Nominal depth of sampling and incubation </td> <td> <p>meters</p> </td> </tr> <tr> <td>GOP</td> <td>Gross oxygen production </td> <td>mmol O<sub>2</sub> m<sup>-3</sup> d<sup>-1</sup></td> </tr> <tr> <td>CR</td> <td>Estimate of community respiration </td> <td>mmol O<sub>2</sub> m<sup>-3</sup> d<sup>-1</sup></td> </tr> <tr> <td> <p>Flag GOP</p> </td> <td>Flag identification for gross oxygen production (good=1,questionable=2)</td> <td> <p>#</p> </td> </tr> <tr> <td> <p>Flag CR</p> </td> <td> <p>Flag identification for community respiration (good=1,questionable=2)</p> </td> <td> <p>#</p> </td> </tr> </tbody> </table> <p> </p> <p>The Light-dark_ALOHA_rates.xlsx file contains metabolic rates measured by the ligth-dark oxygen method between June 2005 and June 2007 at different depths in the euphotic zone at Station ALOHA (22° 45' N, 158° W). Rates of net community production, communnity respiration, and gross oxygen production were measured at 6 depths within the euphotic zone (5, 25, 45, 75, 100, 125 m) in dawn to dawn incubations, following Williams et al. (2004). </p> <p>Data description</p> <table> <tbody> <tr> <td> <p>Variable</p> </td> <td> <p>Description</p> </td> <td> <p>Units</p> </td> </tr> <tr> <td> <p>HOT</p> </td> <td>HOT cruise number</td> <td> <p>#</p> </td> </tr> <tr> <td> <p>Date</p> </td> <td>Date of sampling and start of incubation (UTC -10)</td> <td> <p> </p> </td> </tr> <tr> <td> <p>Depth</p> </td> <td>Nominal depth of sampling and incubation </td> <td> <p>meters</p> </td> </tr> <tr> <td>GOP</td> <td>Gross oxygen production, average of 8 replicates</td> <td>mmol O<sub>2</sub> m<sup>-3</sup> d<sup>-1</sup></td> </tr> <tr> <td>GOP SE</td> <td>Gross oxygen production standard error </td> <td>mmol O<sub>2</sub> m<sup>-3</sup> d<sup>-1</sup></td> </tr> <tr> <td>CR</td> <td> <p>Dark community respiration, average of 8 replicates</p> </td> <td> <p>mmol O<sub>2</sub> m<sup>-3</sup> d<sup>-1</sup></p> </td> </tr> <tr> <td> <p>CR SE</p> </td> <td>Dark community respiration standard error</td> <td> <p>meters</p> </td> </tr> <tr> <td>NCP</td> <td>Net community production,average of 8 replicates </td> <td>mmol O<sub>2</sub> m<sup>-3</sup> d<sup>-1</sup></td> </tr> <tr> <td>NCP SE</td> <td>Net community production standard error </td> <td>mmol O<sub>2</sub> m<sup>-3</sup> d<sup>-1</sup></td> </tr> </tbody> </table> <p> </p>
Backward and forward in time particle-tracking simulation in the Kuroshio Extension re-circulation gyre in 2019
<p>Tracers were released at the targeted mesoscale eddy in September 01 2019, and their surface transport was modeled for the previous 26 days and the forward 72 days. Units are expressed as the number of tracer particles in each glid of 1/12° horizontal resolution. The color shades indicate the number of particles. </p>
Transition of the mesoscale eddy in the Kuroshio Extension re-circulation gyre in 2019
<p>Transition of the mesoscale cyclonic eddy occurred in the Kuroshio Extension re-circulation gyre (KERG) from June to December 2019. Color shades denote sea surface height (SSH) map (color contours, m). The Kuroshio and Kuroshio Extension (KE) are shown by a sharp southward increase in SSH and the recirculation gyre is illustrated by a high-SSH (>1.6 m) region. The SSH map was generated using E.U. Copernicus Marine Service Information.</p>
Export of organic carbon by ocean biological pump from GYRE ocean model
<p>Model data of the biological pump of organic carbon computed from the idealized ocean model GYRE used in: Resplandy, Lévy and McGillicuddy (2019). Effects of eddy-driven subduction on ocean biological carbon pump. Global Biogeochemical Cycles. Readme file describes the data.</p>
Carbon-Phosphorous Lyase Enzyme Activity Profiles in the North Pacific Subtropical Gyre
<p>These datasets contain oceanic enzyme activity measurements of Carbon-Phosphorus (C-P) lyase, a catalytic enzyme pathway, which cleaves C-P bonds, allowing microbial utilization of phosphonates as a phosphorous source. These activity measurements were made in the North Pacific Subtropical Gyre. Samples were collected in the top 1000 m of the water column on KM1717, KM1821, and KM2001 cruises and in the top 225 m of the water column on FK180310-2.</p>
Data from: Vertical gradients in species richness and community composition across the twilight zone in the North Pacific Subtropical Gyre
Although metazoan animals in the mesopelagic zone play critical roles in deep pelagic food webs and in the attenuation of carbon in midwaters, the diversity of these assemblages is not fully known. A metabarcoding survey of mesozooplankton diversity across the epipelagic, mesopelagic and upper bathypelagic zones (0-1500m) in the North Pacific Subtropical Gyre revealed far higher estimates of species richness than expected given prior morphology-based studies in the region (4,024 OTUs, 10-fold increase), despite conservative bioinformatic processing. OTU richness of the full assemblage peaked at lower epipelagic-upper mesopelagic depths (100-300m), with slight shoaling of maximal richness at night due to diel vertical migration, in contrast to expectations of a deep mesopelagic diversity maximum as reported for several plankton groups in early systematic and zoogeographic studies. Four distinct depth-stratified species assemblages were identified, with faunal transitions occurring at 100m, 300m, and 500m. Highest diversity occurred in the smallest zooplankton size fractions (0.2-0.5mm), which had significantly lower % OTUs classified due to poor representation in reference databases, suggesting a deep reservoir of poorly understood diversity in the smallest metazoan animals. A diverse meroplankton assemblage also was detected (350 OTUs), including larvae of both shallow and deep living benthic species. Our results provide some of the first insights into the hidden diversity present in zooplankton assemblages in midwaters, and a molecular reappraisal of vertical gradients in species richness, depth distributions, and community composition for the full zooplankton assemblage across the epipelagic, mesopelagic and upper bathypelagic zones.
Beaufort Gyre westward expansion simulation using a two-layer idelized model
<p>This data set supports the analysis presented in the manuscript: "Beta-drift of eddies drove Beaufort Gyre westward expansion during 2003-2014" (2023GL107142), which is under review for publication by Geophysical Research Letters. </p><p>The model code modified from<br> aronnax (https://github.com/edoddridge/aronnax)</p><p>please refer to:</p><p>Doddridge, E. W., & Radul, A. (2018). Aronnax: An idealised isopycnal ocean model. <i>Journal of Open Source Software</i>, 3(26), 592. <a href="http://doi.org/10.21105/joss.00592">http://doi.org/10.21105/joss.00592</a></p><p>for details of this code</p><p> </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>
Data for "Spurious forces can dominate the vorticity budget of ocean gyres on the C-grid"
<p>This contains data for the submitted paper "Spurious forces can dominate the vorticity budget of ocean gyres on the C-grid" which has been submitted to JAMES.</p>
MITgcm idealized test-case : cyclonic gyre in a mid-latitude closed basin
<p>Model grid data and hydrodynamic output files of the Z-coordinate Massachusetts Institute of Technology general circulation model (MITgcm) for an idealized case-study describing a cyclonic gyre in a mid-latitude closed basin.<br> <br> The domain size is (Ni,Nj,Nk)=(256,256,60).<br> <br> The grid files (Computational_[...]) contain single precision variables (4 bytes), while the hydrodynamic output files contain variables stored in double precision (8 bytes).<br> </p>
Data from article "The potential recording of North Ionian Gyre's reversals as a decadal signal in sea level during the instrumental period"
<p>This repository hosts the data from Meli M. 2024: The potential recording of North Ionian Gyre’s reversals as a decadal signal in sea level during the instrumental period. <em>Scientific Reports, </em><strong>14</strong>, 4907. https://doi.org/10.1038/s41598-024-55579-4</p> <p>The dataset contains:</p> <p>- Python code for analysis of altimetry products ("satellite.py") and tide gauge time series ("tg.py").</p> <p>- The "satellite" folder contains txt files, each representing the annual time series of the first (_1) and second (_2) oscillatory modes decomposed from the satellite altimetry signal and averaged over specific sub-basins. The nc file, on the other hand, contains the time series for every grid point of the altimetry product, along with the various layers (modes) decomposed from the original signal.</p> <p>The "tide_gauges" folder contains npy files, each representing the annual time series of all oscillatory modes decomposed at each tide gauge selected for this analysis. The csv file contains the sub-basin and regional averaged signals of the second oscillatory mode, along with their standard deviations.</p> <p><strong>UPDATE</strong>: In version 2 of the repository, the file IMFs_array.nc (located in the folder satellite.zip) has been updated to IMFs_array_v2.nc. In this version, the land areas in Mode 2 have been masked.</p>
Fortran code to compute the spiralling North Atlantic Gyre
<p>Code to compute and plot the figures describing the North Atlantic Subtropical Gyres contribution to the AMOC. </p>
Prochlorococcus Cell Concentrations During the BiG-RAPA Expedition (Cruise MV1015) in the Peru Current and Eastern South Pacific Subtropical Gyre Between November and December of 2010
<p>"These data include Prochlorococcus cell concentrations (total cell densities by flow cytometry and cell densities for specific ecotypes/clades determined by quantitative PCR). Samples were collected during the C-MORE Biogeochemical Gradients Role in Arranging Planktonic Assemblages (BiG-RAPA) expedition (Cruise MV1015) in the Peru Current and Eastern South Pacific Subtropical Gyre between dates 2010-11-19 and 2010-12-10 along a zonal transect from the northern coast of Chile to the island of Rapa Nui. Prochlorococcus is an important primary producer in the oligotrophic South Pacific Gyre and these data facilitate studies examining Prochlorococcus' ecology." https://www.bco-dmo.org/dataset/886299 Time is in UTC. Additional cruise information and methods can be found here: http://dmoserv3.bco-dmo.org/jg/info/BCO-DMO/C-MORE/prochlorococcus_data%7Bdir=dmoserv3.whoi.edu/jg/dir/BCO-DMO/C-MORE/,data=dmoserv3.bco-dmo.org:80/jg/serv/BCO-DMO/C-MORE/prochlorococcus_data.html0%7D?</p>
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
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International Brain Laboratory public data
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OpenNeuro
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