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  • Age; AGE; Boron-11/Boron-10 ratio; boron isotopes; calcification; COC; Coral; Coral core; Density; DISTANCE; Geochemistry; Linear extension; LIZ13_1; Lizard Island, northern Great Barrier Reef; Month; Ocean acidification; Porites; Porites australiensis, Boron/Calcium ratio; Porites australiensis, Strontium/Calcium ratio; Years  (3)
  • 01. Atmosphere::01.03. Magnetosphere::01.03.03. Magnetospheric physics  (2)
  • 04. Solid Earth::04.03. Geodesy::04.03.05. Gravity variations  (2)
  • American Geophysical Union  (4)
  • PANGAEA  (3)
  • Copernicus
  • Nature Publishing Group
  • 2015-2019  (7)
  • 1980-1984
  • 1935-1939
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Schlagwörter
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Erscheinungszeitraum
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  • 1
    facet.materialart.
    Unbekannt
    Monthly proxy and growth parameter from a core of Porites australiensis from Lizard Island, 1994-06 - 2018-08 (2019)
    PANGAEA
    Details
    Publikationsdatum: 2023-02-12
    Schlagwort(e): Age; AGE; Boron-11/Boron-10 ratio; boron isotopes; calcification; COC; Coral; Coral core; Density; DISTANCE; Geochemistry; Linear extension; LIZ13_1; Lizard Island, northern Great Barrier Reef; Month; Ocean acidification; Porites; Porites australiensis, Boron/Calcium ratio; Porites australiensis, Strontium/Calcium ratio; Years
    Materialart: Dataset
    Format: text/tab-separated-values, 928 data points
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    DATEN PANGAEA
  • 2
    facet.materialart.
    Unbekannt
    Monthly proxy and growth parameter from a core of Porites australiensis from Lizard Island, 1973-06 - 1983-02 (2019)
    PANGAEA
    Details
    Publikationsdatum: 2023-02-12
    Schlagwort(e): Age; AGE; Boron-11/Boron-10 ratio; boron isotopes; calcification; COC; Coral; Coral core; Density; DISTANCE; Geochemistry; Linear extension; LIZ13_1; Lizard Island, northern Great Barrier Reef; Month; Ocean acidification; Porites; Porites australiensis, Boron/Calcium ratio; Porites australiensis, Strontium/Calcium ratio; Years
    Materialart: Dataset
    Format: text/tab-separated-values, 472 data points
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    DATEN PANGAEA
  • 3
    facet.materialart.
    Unbekannt
    Monthly proxy and growth parameter from a core of Porites australiensis from Lizard Island, 1938-12 - 1944-02 (2019)
    PANGAEA
    Details
    Publikationsdatum: 2023-02-12
    Schlagwort(e): Age; AGE; Boron-11/Boron-10 ratio; boron isotopes; calcification; COC; Coral; Coral core; Density; DISTANCE; Geochemistry; Linear extension; LIZ13_1; Lizard Island, northern Great Barrier Reef; Month; Ocean acidification; Porites; Porites australiensis, Boron/Calcium ratio; Porites australiensis, Strontium/Calcium ratio; Years
    Materialart: Dataset
    Format: text/tab-separated-values, 256 data points
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    DATEN PANGAEA
  • 4
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    Insights into shallow magmatic processes at Kīlauea Volcano, Hawaiʻi, from a multiyear continuous gravity time series (2017)
    American Geophysical Union
    Details
    Publikationsdatum: 2021-02-10
    Beschreibung: Continuous gravity data collected near the summit eruptive vent at Kīlauea Volcano, Hawaiʻi, during 2011–2015 show a strong correlation with summit-area surface deformation and the level of the lava lake within the vent over periods of days to weeks, suggesting that changes in gravity reflect variations in volcanic activity. Joint analysis of gravity and lava level time series data indicates that over the entire time period studied, the average density of the lava within the upper tens to hundreds of meters of the summit eruptive vent remained low—approximately 1000–1500 kg/m^3. The ratio of gravity change (adjusted for Earth tides and instrumental drift) to lava level change measured over 15 day windows rose gradually over the course of 2011–2015, probably reflecting either (1) a small increase in the density of lava within the eruptive vent or (2) an increase in the volume of lava within the vent due to gradual vent enlargement. Superimposed on the overall time series were transient spikes of mass change associated with inflation and deflation of Kīlauea’s summit and coincident changes in lava level. The unexpectedly strong mass variations during these episodes suggest magma flux to and from the shallow magmatic system without commensurate deformation, perhaps indicating magma accumulation within, and withdrawal from, void space—a process that might not otherwise be apparent from lava level and deformation data alone. Continuous gravity data thus provide unique insights into magmatic processes, arguing for continued application of the method at other frequently active volcanoes.
    Beschreibung: Published
    Beschreibung: 5477–5492
    Beschreibung: 2V. Dinamiche di unrest e scenari pre-eruttivi
    Beschreibung: JCR Journal
    Beschreibung: restricted
    Schlagwort(e): Kīlauea Volcano; gravity changes; lava lake; volcano monitoring ; 04. Solid Earth::04.02. Exploration geophysics::04.02.02. Gravity methods ; 04. Solid Earth::04.03. Geodesy::04.03.05. Gravity variations ; 04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Materialart: article
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    ARTIKEL (OA)
  • 5
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    Gravity changes and deformation at Kīlauea Volcano, Hawaii, associated with summit eruptive activity, 2009–2012 (2015)
    American Geophysical Union
    Details
    Publikationsdatum: 2017-04-04
    Beschreibung: Analysis of microgravity and surface displacement data collected at the summit of Kīlauea Volcano, Hawaii (USA), between December 2009 and November 2012 suggests a net mass accumulation at ~1.5 km depth beneath the northeast margin of Halema‘uma‘u Crater, within Kīlauea Caldera. Although residual gravity increases and decreases are accompanied by periods of uplift and subsidence of the surface, respectively, the volume change inferred from the modeling of interferometric synthetic aperture radar deformation data can account for only a small portion (as low as 8%) of the mass addition responsible for the gravity increase. We propose that since the opening of a new eruptive vent at the summit of Kīlauea in 2008, magma rising to the surface of the lava lake outgasses, becomes denser, and sinks to deeper levels, replacing less dense gas-rich magma stored in the Halema‘uma‘u magma reservoir. In fact, a relatively small density increase (〈200 kgm_3) of a portion of the reservoir can produce the positive residual gravity change measured during the period with the largest mass increase, between March 2011 and November 2012. Other mechanisms may also play a role in the gravity increase without producing significant uplift of the surface, including compressibility of magma, formation of olivine cumulates, and filling of void space by magma. The rate of gravity increase, higher than during previous decades, varies through time and seems to be directly correlated with the volcanic activity occurring at both the summit and the east rift zone of the volcano.
    Beschreibung: Published
    Beschreibung: 7288–7305
    Beschreibung: 2V. Dinamiche di unrest e scenari pre-eruttivi
    Beschreibung: JCR Journal
    Beschreibung: restricted
    Schlagwort(e): Mass accumulation ; Magma outgassing ; Gravity changes ; Ground deformation ; 04. Solid Earth::04.03. Geodesy::04.03.05. Gravity variations
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Materialart: article
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    ARTIKEL (OA)
  • 6
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    A statistical analysis of low-frequency magnetic pulsations at cusp and cap latitudes in Antarctica (2015)
    American Geophysical Union
    Details
    Publikationsdatum: 2017-04-04
    Beschreibung: We report a statistical analysis of low-frequency magnetic variations (magnetic pulsations, 0.8–7 mHz) at South Pole (74 S corrected geomagnetic latitude) and Terra Nova Bay (80 S) during 1996. The results show that at South Pole (at cusp latitudes) the pulsation power exhibits two maxima during the day, one in the local premidnight and the other in the morning. The first maximum disappears when the analysis is restricted to northward interplanetary magnetic field conditions (Bz 〉 1 nT), suggesting that it might be associated to substorm phenomena. During closed magnetospheric conditions, when the cusp is expected to be located poleward with respect to the station, the spectral and polarization characteristics of pulsations between 1 and 3 mHz suggest that resonant oscillations of the outermost closed field lines commonly occur at South Pole in the local morning. At Terra Nova Bay, in the polar cap, the pulsation power is much lower and its diurnal variation is characterized by a single maximum, which occurs around local noon, when the station approaches the cusp. The corresponding polarization pattern indicates that Terra Nova Bay is always located poleward with respect to resonant field lines.
    Beschreibung: Published
    Beschreibung: A02205
    Beschreibung: 1A. Geomagnetismo e Paleomagnetismo
    Beschreibung: JCR Journal
    Beschreibung: restricted
    Schlagwort(e): geomagnetic pulsations ; magnetospheric dynamics ; 01. Atmosphere::01.03. Magnetosphere::01.03.03. Magnetospheric physics
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Materialart: article
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    ARTIKEL (OA)
  • 7
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    Formation of ionospheric irregularities over Southeast Asia during the 2015 St. Patrickˈs Day storm (2017)
    American Geophysical Union
    Details
    Publikationsdatum: 2022-11-23
    Beschreibung: We investigate the geospace response to the 2015 St. Patrickˈs Day storm leveraging on instruments spread over Southeast Asia (SEA), covering a wide longitudinal sector of the low-latitude ionosphere. A regional characterization of the storm is provided, identifying the peculiarities of ionospheric irregularity formation. The novelties of this work are the characterization in a broad longitudinal range and the methodology relying on the integration of data acquired by Global Navigation Satellite System (GNSS) receivers, magnetometers, ionosondes, and Swarm satellites. This work is a legacy of the project EquatoRial Ionosphere Characterization in Asia (ERICA). ERICA aimed to capture the features of both crests of the equatorial ionospheric anomaly (EIA) and trough (EIT) by means of a dedicated measurement campaign. The campaign lasted from March to October 2015 and was able to observe the ionospheric variability causing effects on radio systems, GNSS in particular. The multiinstrumental and multiparametric observations of the region enabled an in-depth investigation of the response to the largest geomagnetic storm of the current solar cycle in a region scarcely reported in literature. Our work discusses the comparison between northern and southern crests of the EIA in the SEA region. The observations recorded positive and negative ionospheric storms, spread F conditions, scintillation enhancement and inhibition, and total electron content variability. The ancillary information on the local magnetic field highlights the variety of ionospheric perturbations during the different storm phases. The combined use of ionospheric bottomside, topside, and integrated information points out how the storm affects the F layer altitude and the consequent enhancement/suppression of scintillations.
    Beschreibung: Published
    Beschreibung: 12211–12233
    Beschreibung: 1A. Geomagnetismo e Paleomagnetismo
    Beschreibung: 2A. Fisica dell'alta atmosfera
    Beschreibung: 1IT. Reti di monitoraggio e Osservazioni
    Beschreibung: 5IT. Osservazioni satellitari
    Beschreibung: JCR Journal
    Beschreibung: open
    Schlagwort(e): Saint Patrickˈs Day storm ; scintillation enhancement/suppression ; equatorial ionospheric anomaly ; positive and negative ionospheric storms ; spread F ; total electron content variability ; 01. Atmosphere::01.02. Ionosphere::01.02.99. General or miscellaneous ; 01. Atmosphere::01.02. Ionosphere::01.02.02. Dynamics ; 01. Atmosphere::01.02. Ionosphere::01.02.04. Plasma Physics ; 01. Atmosphere::01.02. Ionosphere::01.02.05. Wave propagation ; 01. Atmosphere::01.02. Ionosphere::01.02.06. Instruments and techniques ; 01. Atmosphere::01.02. Ionosphere::01.02.07. Scintillations ; 01. Atmosphere::01.03. Magnetosphere::01.03.99. General or miscellaneous ; 01. Atmosphere::01.03. Magnetosphere::01.03.02. Magnetic storms ; 01. Atmosphere::01.03. Magnetosphere::01.03.03. Magnetospheric physics
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Materialart: article
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    ARTIKEL (OA)
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