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62 results for “Sea level change”
Antarctic Ice Sheet and emission scenario controls on 21st-century extreme sea-level changes
<p>These files accompany the paper: 'Antarctic Ice Sheet and emission scenario controls on 21st-century extreme sea-level changes'.</p> <p>Please cite the accompanying paper if you find this data useful.</p> <p><strong>Contents</strong><br> This dataset contains netCDF files with all the mean sea level scenarios and the accompanying uncertainties. The file 'esl_results.xlsx' contains the estimated GPD parameters for each tide-gauge site, as well as the estimated 100-year amplification factor and allowance. The files result_concise_table_af.pdf and result_concise_table_al.pdf contain easy-to-access overviews of the amplification factors and allowances sorted per station.<br> </p> <p>(c) 2019 California Institute of Technology. U.S. Government sponsorship acknowledged.<br> This work is licensed under the Creative Commons Attribution-ShareAlike 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by-sa/4.0/ or send a letter to Creative Commons, PO Box 1866, Mountain View, CA 94042, USA.</p>
Supporting data to 'Correlations between sea-level components are driven by regional climate change'
<p>Dataset supporting the initial submission of the manuscript 'Correlations between sea-level components are driven by regional climate change'</p>
Using UCEs to track the influence of sea-level change on leafy seadragon populations
<p>Data and code used in bioinformatic processing, bathymetry calculations, population genetic analyses and their output files. Ultraconserved Elements (UCEs) were sequenced in 68 individuals of leafy seadragons (<em>Phycodurus eques</em>, Syngnathidae) sampled across their range along the southern Australian coast.</p> <p>The repository contains</p> <p>A) Scripts to process the sequence data and the resulting</p> <ul> <li>BAM read mapping files</li> <li>VCF files with SNPs before and after filtering</li> </ul> <p> </p> <p>B) Scripts, input files, and output files for the analyses to</p> <ul> <li>reconstruct shallow water areas at different sea levels</li> <li>estimate population structure (PCA, DAPC, Structure, SVDquartets), and spatial genetic patterns (IBD plots, EEMS)</li> <li>calculate genetic diversity (individual-level heterozygosity, population-level heterozygosity, Tajima's D)</li> <li>perform phylogeographic modeling (DIYABC).</li> </ul>
Data from: How sea-level change mediates genetic divergence in coastal species across regions with varying tectonic and sediment processes
Plate tectonics and sediment processes control regional continental shelf topography. We examine the genetic consequences of how glacial-associated sea-level change interacted with variable near-shore topography since the last glaciation. We reconstructed the size and distribution of areas suitable for tidal estuary formation from the Last Glacial Maximum, ~20 thousand years ago, to present from San Francisco, California, USA (~38 °N) to Reforma, Sinaloa, Mexico (~25 °N). We assessed range-wide genetic structure and diversity of three co-distributed tidal estuarine fishes (California Killifish, Shadow Goby, Longjaw Mudsucker) along ~4,600 km using mitochondrial control region and cytB sequence, and 16–20 microsatellite loci from a total of 524 individuals. Results show that glacial-associated sea-level change limited estuarine habitat to few, widely separated refugia at glacial lowstand, and present-day genetic clades were sourced from specific refugia. Habitat increased during postglacial sea-level rise and refugial populations admixed in newly formed habitats. Continental shelves with active tectonics and/or low sediment supply were steep and hosted fewer, smaller refugia with more genetically differentiated populations than on broader shelves. Approximate Bayesian computation favored the refuge-recolonization scenarios from habitat models over isolation by distance and seaway alternatives, indicating isolation at lowstand is a major diversification mechanism among estuarine (and perhaps other) coastal species. Because sea-level change is a global phenomenon, we suggest this top-down physical control of extirpation-isolation-recolonization may be an important driver of genetic diversification in coastal taxa inhabiting other topographically complex coasts globally during the Mid- to Late Pleistocene and deeper timescales.
Pollen data: Influences of sea level changes and volcanic eruptions on Holocene vegetation in Tonga
<p><strong>Aim</strong>:</p> <p>To investigate mid- to late-Holocene vegetation changes on low-lying coastal areas in Tonga and how changing sea level and recurrent volcanic eruptions have influenced vegetation dynamics on four islands of the Tongan Archipelago (South Pacific).</p> <p><strong>Methods: </strong></p> <p>To investigate past vegetation and environmental change at Ngofe Marsh ('Uta Vava'u) we examined palynomorphs (pollen and spores), charcoal (fire), and sediment characteristics (volcanic activity) from a 6.7-m long sediment core. Radiocarbon dating indicated the sediments were deposited over the last 7700 years. We integrated the Ngofe Marsh data with similar previously published data from Avai'o'vuna Swamp on Pangaimotu Island, Lotofoa Swamp on Foa Island, and Finemui Swamp on Ha'afeva Island. Plant taxa were categorised as littoral, mangrove, rainforest, successional/ disturbance, and wetland groups and linear models were used to examine relationships between vegetation, relative sea-level change, and volcanic eruptions (tephra).</p> <p><strong>Results</strong>:</p> <p>Relative sea-level change has impacted vegetation on three of the four islands investigated. Volcanic eruptions were not identified as a driver of vegetation change. Rainforest decline does not appear to be driven by sea-level changes or volcanic eruptions. From all sites analysed, vegetation at Finemui Swamp was most sensitive to changes in relative sea level.</p> <p><strong>Conclusions: </strong></p> <p>While vegetation on low-lying Pacific islands is sensitive to changing sea levels, island characteristics, such as size and elevation, are also likely to be important factors that mediate specific island responses to drivers of change.</p>
Figure 1 in Climate Changes of the Temperature of the Surface and Level of the Black Sea by the Data of Remote Sensing at the Coast of the Krasnodar Krai and the Republic of Abkhazia
Figure 1. The Black Sea coast of the Krasnodar Krai and the Republic of Abkhazia.
Pollen data: Influences of sea level changes and volcanic eruptions on Holocene vegetation in Tonga
Open the record for dataset details and reuse information.
Data from: How sea-level change mediates genetic divergence in coastal species across regions with varying tectonic and sediment processes
Open the record for dataset details and reuse information.
A global analysis of subsidence, relative sea-level change and coastal flood exposure
<p>This repository contains the data and the scripts used to create results, figures and tables in the paper "A global analysis of subsidence, relative sea-level change and coastal flood exposure" by R. Nicholls et al. published in Nature Climate Change (DOI-link to follow).</p>
Data from: Seasonal dynamics and changing sea level as determinants of the community and trophic structure of oribatid mites in a salt marsh of the Wadden Sea
Global change processes affect seasonal dynamics of salt marshes and thereby their plant and animal communities. However, these changes have been little investigated for microarthropod communities. We studied the effect of seasonality and changes in sea level on oribatid mites in the natural salt marsh and on artificial islands in the back-barrier environment of the island Spiekeroog (Wadden Sea, Germany). Three zones of the artificial islands were filled with transplanted sods from the lower salt marsh zone and thereby exposed to three different inundation frequencies. We hypothesized that oribatid mite communities will differ along the natural salt marsh vegetation zones [upper salt marsh (USM), lower salt marsh (LSM), pioneer zone (PZ)], which are influenced by different tidal regimes. Accordingly, total oribatid mite densities declined from the USM and LSM to the PZ. Similarly, oribatid mite species compositions changed along the salt marsh transect and also responded to variations in inundation frequency in LSM on artificial islands with typical species of the USM, LSM and PZ being Multioppia neglecta (USM), Hermannia pulchella (LSM), Zachvatkinibates quadrivertex (LSM, PZ) and Ameronothrus schneideri (LSM, PZ). Oribatid mite density in the salt marsh and on the artificial islands was at a maximum in winter and spring; this was due in part to high density of juveniles, pointing to two reproductive periods. We hypothesized that oribatid mite trophic structure changes due to variations in abiotic (e.g., tidal dynamics, temperature) and biotic conditions (e.g., resource availability). Stable isotope (15N, 13C) and neutral lipid fatty acid analyses indicated that oribatid mite species have different diets with e.g., Z. quadrivertex feeding on macroalgae and fungi, A. schneideri feeding on microalgae and bacteria, and Scheloribates laevigatus and M. neglecta feeding on dead organic matter, bacteria and fungi. Overall, the results indicate that oribatid mite species in salt marshes are affected by changes in environmental factors such as inundation intensity, with the effects being most pronounced in species with narrow trophic niches and limited niche plasticity. The results also indicate that oribatid communities of the LSM respond little to short-term (one year) changes in inundation frequency.
Role of sea level and seaway in modulating the Hadley circulation change during the Last Glacial period
<p>These data are calculated by our model output.</p>
Predicting changes in molluscan spatial distributions in mangrove forests in response to sea-level rise
<p class="MsoNormal"><span>Molluscs are an important component of the mangrove ecosystem, and the vertical distributions of molluscan species in this ecosystem are primarily dictated by tidal inundation. Thus, sea-level rise (SLR) may have profound effects on mangrove mollusc communities. Here, we used dynamic empirical models, based on measurements of surface elevation change, sediment accretion, and molluscan zonation patterns, to predict changes in molluscan spatial distributions in response to different sea-level rise rates in the mangrove forests of Zhenzhu Bay (Guangxi, China). The change in surface elevation was 4.76–9.61 mm yr</span><sup><span>−</span></sup><sup><span>1</span></sup><span> during the study period (2016–2020), and the magnitude of surface-elevation change decreased exponentially as original surface elevation increased. Based on our model results, we predicted that mangrove molluscs might successfully adapt to a low rate of SLR (2.00–4.57 mm yr</span><sup><span>−</span></sup><sup><span>1</span></sup><span>) by 2100, with molluscs moving seaward and those in the lower intertidal zones expanding into newly available zones. However, as SLR rate increased (4.57–8.14 mm yr</span><sup><span>−</span></sup><sup><span>1</span></sup><span>), our models predicted that surface elevations would decrease beginning in the high intertidal zones and gradually spread to the low intertidal zones. Finally, at high rates of SLR (8.14–16.00 mm yr</span><sup><span>−</span></sup><sup><span>1</span></sup><span>), surface elevations were predicted to decrease across the elevation gradient, with molluscs moving landward and species in higher intertidal zones blocked by landward barriers. Tidal inundation and the consequent increases in interspecific competition and predation pressure were predicted to threaten the survival of many molluscan groups in higher intertidal zones, especially arboreal and infaunal molluscs at the landward edge of the mangroves, resulting in a substantial reduction in the abundance of original species on the landward edge. Thus, future efforts to conserve mangrove floral and faunal diversity should prioritize species restricted to landward mangrove areas and protect potential species habitats.</span></p>
Sea level rise will drastically change estuaries: A Columbia River perspective
<p>This repository consists of two gzip compressed tar files: 1) SLCModelRuns.tar.gz containing model source code and model run data used for generating the data for the referenced paper and 2) SLCPaperFigures.tar.gz with the scripts and data used to generate the figures.</p>
Framework for Assessing Changes To Sea-level (FACTS) Module Data - EBM3 FAIR2
<p>Input module data sets from the Framework for Assessing Changes To Sea-level (FACTS). These files should be installed in the modules-data/ directory. See the FACTS <a href="https://github.com/radical-collaboration/facts">github</a> for more information. </p> <p>NOTE: This is an additional database for FACTS versions 1.2 and above and does not include all of the modules data files needed to run FACTS. The other files can be found <a href="../records/7478192">here.</a></p> <p> </p> <p><strong>FAIR 2.0 DATA</strong></p> <ul> <li>Data included in fair2_climate_project_data.tgz are the constrained data sets as outlined in the FAIR github repo <a href="https://github.com/OMS-NetZero/FAIR/blob/master/examples/calibrated_constrained_ensemble.ipynb">here</a>. It includes the following: <ul> <li>Calibrated Constrained Parameters</li> <li>FAIR AR6 Climate Parameters</li> <li>Solar Forcing</li> <li>Volcanic Forcing</li> <li>Species Configurations</li> <li>RCMIP Concentration Annual Means</li> <li>RCMIP Emissions Annual Means</li> </ul> </li> </ul> <p><strong>EMB3 DATA</strong></p> <ul> <li>Data included in ebm3_thermal_expansion_data.tgz are: <ul> <li>Calibrated Constrained Parameters</li> <li>Expansion Coeffecient files</li> </ul> </li> </ul> <p> </p> <p> </p>
Fig. 6 in How might sea level change affect arthropod biodiversity in anchialine caves: a comparison of Remipedia and Atyidae taxa (Arthropoda: Altocrustacea)
Fig. 6 Profile of cave networks in a karst platform with a steep shelf at left and shallow shelf at right. (a) Past glacial maximum (18 kya), (b) current sea level. Double arrows represent vertical connections between horizontal cave passages. Dashed lines represent upper layers of meteoric groundwater and marine layers, which change as sea level rises from (a) -120 m to (b) 0 m, creating variation in connectivity of cave passage. On the edges of continental plates (left side of diagram), passages remain vertically connected throughout the rock profile as sea level falls. On more gradual slopes (right side of diagram), vertical connections are less common, causing breaks in anchialine cave networks as sea level falls
Fig. 1 in How might sea level change affect arthropod biodiversity in anchialine caves: a comparison of Remipedia and Atyidae taxa (Arthropoda: Altocrustacea)
Fig. 1 Remipede species richness in (a) the Caribbean, (b) Canary Islands, (c) Western Australia, and (d) global richness. Species richness by cave correlates with size of white circles. For (d), only the caves with the highest richness in the region are shown. The present-day coastlines are outlined in black, and the land masses exposed 18 kya are illustrated
Data from: Climate and sea-level changes across a shallow marine Cretaceous–Palaeogene boundary succession in Patagonia, Argentina
Upper Maastrichtian to lower Paleocene, coarse-grained deposits of the Lefipán Formation in Chubut Province, (Patagonia, Argentina) provide an opportunity to study environmental changes across the Cretaceous–Palaeogene (K–Pg) boundary in a shallow marine depositional environment. Marine palynological and organic geochemical analyses were performed on the K–Pg boundary interval of the Lefipán Formation at the San Ramón section. The palynological and organic geochemical records from the San Ramón K–Pg boundary section are characteristic of a highly dynamic, nearshore setting. High abundances of terrestrial palynomorphs, high BIT-index values and the occasional presence of plant fossils are indicative of a large input of terrestrial organic material. The organic-walled dinoflagellate cyst (dinocyst) assemblage is generally dominated by Senegalinium and other peridinioid dinocyst taxa, indicative of high-nutrient conditions and decreased salinities, probably associated with a large fluvial input. The reconstructed sea surface temperatures range from 25°C to 27°C, in accordance with the tropical climate inferred by palynological and megafloral studies. As in the Bajada del Jagüel section, ~500 km north-north-east of San Ramón, peaks of Senegalinium spp. were recorded below and above the K–Pg boundary, possibly related to enhanced runoff resulting from more humid climatic conditions. The lithological, palynological and organic geochemical records suggest the occurrence of a sea-level regression across the K–Pg boundary, resulting in a hiatus directly at the boundary in both sections, followed by a transgression in the Danian.
The roles of aridification and sea level changes in the diversification and persistence of freshwater fish lineages
<p>While the influence of Pleistocene climatic changes on divergence and speciation has been well-documented across the globe, complex spatial interactions between hydrology and eustatics over longer timeframes may also determine species evolutionary trajectories. Within the Australian continent, glacial cycles were not associated with changes in ice cover and instead largely resulted in fluctuations from moist to arid conditions across the landscape. Here, we investigate the role of hydrological and coastal topographic changes brought about by Plio-Pleistocene climatic changes on the biogeographic history of a small Australian freshwater fish, the southern pygmy perch <em>Nannoperca australis</em>. Using 7,958 ddRAD-seq (double digest restriction-site associated DNA) loci and 45,104 filtered SNPs, we combined phylogenetic, coalescent and species distribution analyses to investigate the various roles of aridification, sea level and tectonics and associated biogeographic changes across southeast Australia. Sea-level changes since the Pliocene and reduction or disappearance of large waterbodies throughout the Pleistocene were determining factors in strong divergence across the clade, including the initial formation and maintenance of a cryptic species, <em>N.</em> 'flindersi'. Isolated climatic refugia and fragmentation due to lack of connected waterways maintained the identity and divergence of inter- and intraspecific lineages. Our historical findings suggest that predicted increases in aridification and sea level due to anthropogenic climate change might result in markedly different demographic impacts, both spatially and across different landscape types.</p>
Preservation and destruction of Holocene marine terraces: the effects of episodic versus gradual relative sea level change
<p>Dataset contains RPM source codes, a sample RPM simulation code, and data of the results presented "Preservation and destruction of Holocene marine terraces: the effects of episodic versus gradual relative sea level change"</p>
Middle Holocene relative sea-level changes and vertical tectonic crustal movements on Shikoku Island near the Nankai Trough, Japan
<p>The Philippine Sea plate subducts beneath the Eurasia plate at the Nankai Trough, northwestern Pacific, causing crustal deformation, mega-thrust earthquakes, and tsunami events. Shikoku Island, 150 km northwest of the trough, experiences both coseismic and interseismic deformation. Coastal sediments potentially record vertical crustal movements as relative sea level (RSL) changes. We studied sedimentary facies and microfossil ostracodes in core SKM from southwestern Shikoku Island for evidence of middle Holocene tsunami events and deformation. The core sediments included nine event layers corresponding to storm or tsunami events. Using modern analog techniques, we estimated RSLs from the ostracode assemblages of core SKM and 13 other cores from Shikoku Island and the surrounding region. Then, we subtracted RSL changes due to glacio-hydro isostatic adjustment from the estimated RSLs to estimate vertical tectonic movement rates in these cores between 8.6 and 4.7 ka. The inferred RSL changes suggest that the Sukumo site has experienced both uplift and subsidence since 8.6 ka. Before 6.6 ka, rates of the tectonic crustal movement were higher than the modern-day rate, and its spatial distribution also differed. After 6.6 ka, the tectonic crustal movement showed a similar spatial pattern and occurred at rates close to the modern-day interseismic rate. The spatial pattern and rates of tectonic crustal movement could be caused by changes in rupture areas between Eurasia and the Philippine Sea plates beneath Shikoku Island and in stress conditions of the asthenosphere. Some of the vertical displacements can be explained by the movements of local active faults.</p>
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.