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72 results for “medusa”
Seafloor organic carbon flux output from the NEMO-MEDUSA model
<p>This output was produced by a simulation using a coupled ocean physics and marine biogeochemistry model. The physical ocean submodel was the Nucleus for European Modeling of the Ocean (NEMO) physical ocean model (Madec, 2014), run here in a global 1/12-degree resolution configuration (ORCA0083). The marine biogeochemistry submodel was the Model of Ecosystem Dynamics, nutrient Utilisation, Sequestration and Acidification (MEDUSA-2), an intermediate-complexity plankton ecosystem model (Yool et al., 2013). The horizontal resolution of this configuration of NEMO has non-uniform grid cells ranging 2 to 9 km in size (mean 7.5 km), with 75 vertical depth levels (31 levels between the surface and 200 m depth). Sea-ice is represented in the model by the Louvian‐la‐Neuve Ice Model (LIM2) (Fichefet, & Maqueda, M. a. M., 1997; Goosse & Fichefet, 1999). The configuration was forced at the air-sea interface with version 5.2 of the DRAKKAR forcing set (DFS) (Brodeau et al., 2010). DFS 5.2 is based on ERA40 reanalysis data, comprising of 6‐hourly means for wind, humidity, and atmospheric temperature, daily means for radiative fluxes (both longwave and shortwave), and monthly means for precipitation. A monthly climatology was used for river runoff, taken from the CORE2 reanalysis (Brodeau et al., 2010; Timmermann et al., 2005). The resulting model hindcast was created using this forcing set for the period 1958–2015, with marine biogeochemistry initialised in 1990.</p> <p>This archive includes the flux of organic carbon reaching the seafloor and the area of the grid cells for the global domain. In MEDUSA, the seafloor flux is the sum of slow- and fast-sinking detrital particles that reach the base of the water column and enter the benthic submodel of MEDUSA. In general, away from shallow water regions (< 200 m), this flux is dominated by fast-sinking material produced by ecological processes associated with the large components of MEDUSA.</p> <p>The specific subset of output used was drawn from the decadal period 2006-2015, and was regridded from the non-uniform ORCA0083 grid to a regular 1/12-degree grid. Output processing was undertaken by A. Yool (axy@noc.ac.uk; National Oceanography Centre, Southampton UK).</p> <p>In addition to the netCDF files, text file dumps of their contents are included to assist with interpretation.</p> <p>References:</p> <p>Brodeau, L., Barnier, B., Treguier, A.‐M., Penduff, T., & Gulev, S. (2010). An ERA40‐based atmospheric forcing for global ocean circulation models. Ocean Modelling, 31, 88–104.</p> <p>Fichefet, T., & Maqueda, M. a. M. (1997). Sensitivity of a global sea ice model to the treatment of ice thermodynamics and dynamics. Journal of Geophysical Research, Oceans, 102, 12,609–12,646.</p> <p>Goosse, H., & Fichefet, T. (1999). Importance of ice‐ocean interactions for the global ocean circulation: A model study. Journal of Geophysical Research, Oceans, 104, 23,337–23,355.</p> <p>Kelly, S., Popova, E., Aksenov, Y., Marsh, R., & Yool, A. (2018). Lagrangian modeling of Arctic Ocean circulation pathways: Impact of advection on spread of pollutants. J. Geophys. Res. Oceans, 123, 2882‐2902, doi: 10.1002/2017JC013460.</p> <p>Madec, G. (2014). "NEMO Ocean engine" (draft edition r5171) "NEMO Ocean engine" (draft edition r5171). Note du Pôle de modélisation, Institut Pierre‐Simon Laplace (IPSL), France, 27, 1288–1619.</p> <p>Timmermann, R., Goosse, H., Madec, G., Fichefet, T., Ethe, C., & Dulière, V. (2005). On the representation of high latitude processes in the ORCA‐LIM global coupled sea ice–ocean model. Ocean Modelling, 8, 175–201.</p> <p>Yool, A., Popova, E.E. and Anderson, T.R. (2013). MEDUSA-2.0: an intermediate complexity biogeochemical model of the marine carbon cycle for climate change and ocean acidification studies. Geoscientific Model Development 6, 1767-1811, doi: 10.5194/gmd-6-1767-2013.</p>
Seafloor output from the MEDUSA model
<p>- Output from the MEDUSA model (Yool et al., GMD, 2013)</p> <p>- NEMO resolution 1/4-degree</p> <p>- REGRID versions are regridded from ORCA025 grid to a regular 0.25-degree grid</p> <p>- Simulation performed as part of the ROAM project (UK Ocean Acidification Research Programme)</p> <p>- CMIP5 Historical and RCP 8.5 extension (1975-2099 inclusive)</p> <p>- Simulation described in Yool et al., JGR, 2015</p> <p>- Subset of output prepared for Mission Atlantic project by A. Yool in April 2021</p> <p>- Seafloor fields of physical and biogeochemical properties for the periods 2016-2025 and 2090-2099</p> <p>- Note that this is test output produced for a specific purpose</p> <p>- The output has been regridded to a regular 1/4-degree grid</p>
Seafloor output from the MEDUSA model
<p>- Output from the MEDUSA model (Yool et al., GMD, 2013)</p> <p>- NEMO resolution 1/4-degree</p> <p>- REGRID versions are regridded from ORCA025 grid to a regular 0.25-degree grid</p> <p>- Simulation performed as part of the ROAM project (UK Ocean Acidification Research Programme)</p> <p>- CMIP5 Historical and RCP 8.5 extension (1975-2099 inclusive)</p> <p>- Simulation described in Yool et al., JGR, 2015</p> <p>- Subset of output prepared for Mission Atlantic project by A. Yool in April 2021</p> <p>- Seafloor fields of physical and biogeochemical properties for the periods 2016-2025 and 2090-2099</p> <p>- Note that this is test output produced for a specific purpose</p> <p>- v1.3 corrects a problem in the regridding at v1.2</p>
Seafloor output from the MEDUSA model
<p>- Output from the MEDUSA model (Yool et al., GMD, 2013)</p> <p>- NEMO resolution 1/12-degree</p> <p>- REGRID versions are regridded from ORCA0083 grid to a regular 1/12-degree grid</p> <p>- Simulation performed as part of core NOC activities</p> <p>- Forced under version 5.2 of the DRAKKAR observation-based reanalysis dataset (DFS)</p> <p>- Physical simulation described in Kelly, S. J., Popova, E., Aksenov, Y., Marsh, R., & Yool, A. (2020). They came from the Pacific: How changing Arctic currents could contribute to an ecological regime shift in the Atlantic Ocean. Earth's Future, 8, e2019EF001394. https://doi.org/10.1029/2019EF001394</p> <p>- Subset of output prepared for Mission Atlantic project by A. Yool in August 2021</p> <p>- Seafloor fields of model properties for the periods 2006-2015</p> <p>- Note that this is test output produced for a specific purpose</p> <p>- The output has been regridded to a regular 1/12-degree grid</p>
Figure 1 in A new species of medusae from Luoyuan Bay, Fujian, China
Figure 1. Euphysora luoyuanensis Xu, Huang & Yang, sp. nov., lateral view, photo (A) and line-drawing (B). Scale bars = 0.5 mm.
Hordeum caput-medusae var. caput-medusae (BR0000012468805)
Belgium Herbarium image of <a href="https://www.plantentuinmeise.be">Meise Botanic Garden</a>.
Fig. 4 in Species composition and distribution of medusae (Cnidaria: Medusozoa) along the Algerian coast between 2°E and 7°E (SW Mediterranean Sea) Abstract
Fig. 4: Correspondence analysis (CA) showing the repartitions of the medusa species between the central and eastern regions.
Fig. 2 in Species composition and distribution of medusae (Cnidaria: Medusozoa) along the Algerian coast between 2°E and 7°E (SW Mediterranean Sea) Abstract
Fig. 2: Fluctuation of the environmental parameters at the sampling stations along the Algerian coast (a: temperature; b: salinity; c: chlorophyll a).
Fig. 6 in Species composition and distribution of medusae (Cnidaria: Medusozoa) along the Algerian coast between 2°E and 7°E (SW Mediterranean Sea) Abstract
Fig. 6: Principal component analysis (PCA) showing the relationships between the medusae species and the environmental variables.
Fig. 5 in Species composition and distribution of medusae (Cnidaria: Medusozoa) along the Algerian coast between 2°E and 7°E (SW Mediterranean Sea) Abstract
Fig. 5: Spatial distribution of the main species: a. A. hemistoma; b. L. tetraphylla; c. R. velatum; and d. P. noctiluca along the Algerian coast (2°E -7°E) during the surveyed period. Table 3. Segregation values (D index) recorded between pairs of dominant species along the Algerian coast.
Fig. 2 in The Hydroid Stage of the Medusa Koellikerina bouilloni (Cnidaria, Hydrozoa)
Fig. 2. The Medusae of Koellikerina bouilloni Kawamura and Kubota, 2005 released form the rearing polyps in the laboratory. A. a newly released medusa; B. a 2-weeks old medusa; C. a 2-months old male medusa with well visible gonads; D. gonads of C; E. a batch of marginal tentacles of C. Scales=0.5 mm (A), 1 mm (B), 2 mm (C).
Fig. 1 in The Hydroid Stage of the Medusa Koellikerina bouilloni (Cnidaria, Hydrozoa)
Fig. 1. The polyps of Koellikerina bouilloni Kawamura and Kubota, 2005 collected from Isozaki, Hitachinaka, Ibaraki, Japan. A. hydroid colony growing on the shell of Nassarius festivus. This photo was taken after the colony was cleared from detritus and algal overgrowth, B. a polyp with a medusa bud (m) and a hydranth (h). Scales=5 mm (A), 0.5 mm (B).
Carbon-latitude analysis of the ocean carbon cycle computed from NEMO-Medusa
<p>NetCDF files containing carbon-latitude stream functions computed from the coupled physical-biogeochemical model NEMO-Medusa. The stream functions have been computed for the last years of a historical run and the first years of the RCP 8.5 scenario run (2000-2009). The dataset includes a climatology of the most important tracers, the computed meridional carbon transports in the ocean, and volume distribution in the carbon-latitude space.</p>
Figures 1–4 in The freshwater medusa Limnocnida and associated plankton in the floodplain of the Ayeyarwaddy River, Myanmar
Figures 1–4. Limnocnida from Myanmar. (1) Whole umbrella showing primary tentacles on one quadrant, and all tentacles on another quadrant. (2) Umbrella margin, showing bases of two primary tentacles with associated secondary tentacles and statocysts. (3) Part of the basal region of a tentacle showing groups of nematocysts. (4) Arrangement of nematocysts near the tip of a tentacle.
Taeniatherum caput-medusae (L.) Nevski (BR0000024508728)
Belgium Herbarium image of <a href="https://www.plantentuinmeise.be">Meise Botanic Garden</a>.
Data from: An intermediate type of medusa from the early Cambrian Kuanchuanpu Formation, South China
The tetraradial or pentaradial fossil embryos and related hatched individuals from the early Cambrian Kuanchuanpu Formation are of great interest for understanding the early evolution of medusozoans. The phylogenetic and evolutionary significance of their external and internal characters (e.g. manubrium, tentacles, septa and claustra) is still controversial. Here we describe a new pentamerous medusozoan, <i>Hanagyroia orientalis</i> gen. et sp. nov., characterized by five well-developed perradial oral lips around a remarkably large manubrium, a conspicuous equatorial groove, and five short interradial pairs of extensile tentacles at the bell margin. Internally, five broad and stout interradial septa join horizontally to form the claustra. <i>Hanagyroia orientalis</i> lacks the frenula, apertural lappet and velarium seen in coeval microfossils and extant cubozoans. Although <i>H. orientalis</i> resembles extant coronate scyphozoans in its round medusa-like bell margin and equatorial groove, cladistic analysis suggests close affinity with cubozoans. <i>Hanagyroia</i> may represent an intermediate morphological type between scyphozoans and cubozoans. The well-developed oral lips and paired short strong tentacles of <i>Hanagyroia</i> suggest direct development.
Medusa fountain
This is a photoscan of the Medusenbrunnen (Medusa Fountain) in Frankfurt, Germany. The fountain is located in the small Public Garden. This garden is part of the Wall Park, which is reminiscent of Frankfurt's former city ramparts. The Medusa Fountain was made of spolias of the Palais Löwenstein which burned out 1944 after it was hit by bombs.<br><br> <br> Picture of Medusa Fountain by [musenkuss.de](https://musenkuss.de/das-gruene-herz-das-keiner-kennt/)<br><br> 119 pictures were taken to build the mesh and the textures. In addition there is a low poly mesh with 15,000 vertices and 8k textures. I used Agisoft Metashape for the construction process and edited in Blender. Source: Objaverse 1.0 / Sketchfab
Маска медузы Горгоны / Mask of Gorgon Medusa
Маска медузы Горгоны Древняя Греция, II в. н. э Терракота Коллекция А.Ф. Эльтермана МИПУ ХФ 1205 Музей истории Пермского университета Mask of Gorgon Medusa II century A.D. Terracotta Collection of A. Elterman МИПУ ХФ 1205 Perm University History Museum Source: Objaverse 1.0 / Sketchfab
Fig. 3 in Species composition and distribution of medusae (Cnidaria: Medusozoa) along the Algerian coast between 2°E and 7°E (SW Mediterranean Sea) Abstract
Fig. 3: Distribution of the total abundance of medusae along the Algerian coast (2°E -7°E).
Data from: An intermediate type of medusa from the early Cambrian Kuanchuanpu Formation, South China
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