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  • 2020-2024  (4)
  • 1985-1989  (4)
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Language
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Year
  • 1
    Book
    Book
    Current meter data from the Australian Coastal Experiment; a data report (1985)
    Details Availability
    Type of Medium: Book
    Pages: 51 S , graph. Darst
    ISBN: 0643036539
    Series Statement: Report / CSIRO Marine Laboratories 169
    Language: English
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  • 2
    Electronic Resource
    Electronic Resource
    Spectra and structure of organophosphorus compounds. 32. Infrared and Raman spectra, conformational stability, barriers to internal rotation, vibrational assignment, and normal coordinate analysis of ethyldifluorophosphine (1987)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 91 (1987), S. 2769-2778 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100295a025
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Spectra and structure of organophosphorus compounds. XXIII. Microwave spectra, electric dipole moment, and molecular structure of two conformers of ethyldifluorophosphine (1985)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 82 (1985), S. 3894-3902 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The microwave spectrum of ethyldifluorophosphine, CH3CH2PF2, has been investigated in the region from 18.0 to 39.5 GHz. The spectra of two conformers have been identified. The ground state and seven vibrationally excited states have been assigned for the more stable gauche conformer (phosphorus lone pair with respect to CH3 group), whereas the ground state and one excited state have been assigned for the trans form. Rotational and most quartic centrifugal distortion constants have been determined with A=6784.501(3), B=2930.156(2), C=2352.576(2) MHz for gauche and A=5444.910(3), B=3290.133(3), C=2871.915(3) MHz for trans, both in the ground state. Electric dipole moments were obtained from ground state Stark effect measurements: || μa||=1.990(4), || μb||=0.855(4), || μc||=0.091(7), || μt||=2.168(2) D for gauche and || μa||=1.780(10), || μb||=0, || μc||=1.077(10), || μt||=2.081(10) D for trans. Using a new computer program, a diagnostic least-squares fit of the structural parameters suggests significant structural differences between the conformers, notably the C–C–P angle which changes from 110.7° in the gauche form to 114.9° in the trans form. From a temperature study of the microwave spectrum, it was found that the gauche conformer is at least 80 cm−1 (229 cal/mol) more stable than the trans conformer. These results are compared to similar quantities in some corresponding molecules.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.448880
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    The surgical anatomy of the rectum — a review with particular relevance to the hazards of rectal mobilisation (1987)
    Springer
    International journal of colorectal disease 2 (1987), S. 158-166 
    Details
    ISSN: 1432-1262
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The major complications of rectal surgery that are wholly or partially avoidable by the use of an anatomically based dissection are haemorrhage from presacral veins, perforation of the rectum, damage to pelvic autonomic nerves and inadequate clearance of a rectal cancer. Important technical points in minimising the incidence of these complications are: (1) posterior dissection in the presacral space; (2) entry to this space by sharp dissection immediately posterior to the superior rectal artery; (3) deliberate incision of the rectosacral fascia; (4) anterior dissection posterior to Denonvilliers fascia in benign disease; (5) removal of the entire mesorectum for low rectal cancer. Other anatomical points not widely appreciated are: 1. The middle rectal artery does not run in the lateral ligaments of the rectum, but below them, on levator ani. It reaches the rectum by penetrating Denonvilliers' fascia. 2. The lateral ligaments may contain an accessory middle rectal artery in 25% of cases. 3. The pelvic autonomic nerves are buried in endopelvic fascia on the pelvic side wall, but come to lie close to the anterior aspect of the rectum at the level of the prostate or upper vagina.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01648000
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    Paper (German National Licenses)
    Fulltext
  • 5
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    Understanding historical Australian sea level trends and variability (2023)
    In:  XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
    Details
    Publication Date: 2023-05-16
    Description: Global mean sea level has been rising and is attributed to anthropogenic climate change forcing. The causes are mainly thermal expansion due to ocean warming and addition of water mass into the ocean from melting of land ice. Regional sea levels can deviate significantly from global mean sea level due to different processes at various spatiotemporal scales. In this study, we examine Australian sea levels and underlying mechanisms based on observations from 1880s to current, including direct sea level measurements by in-situ tide gauges and satellite altimetry, as well as other relevant oceanic and atmospheric observations. We focus on three aspects to explain the regional distribution of Australian sea levels. Firstly, we examine the connection of sea levels with modes of climate variability (e.g., ENSO) and driving physical processes (e.g., wave propagation). Secondly, the regional sea level budget from 1966 to present from selected tide gauges are analysed to identify the dominant factors for sea level trends, including ocean dynamics, sea level fingerprints, vertical land movement and inverse barometer effect. Thirdly, the connection between Australian sea levels and ocean gyre circulation and boundary currents (such as the South Pacific subtropical ocean gyre and East Australian Current) are identified, focusing on coastal sea levels in response to strength and position of ocean gyres and boundary currents. Findings from this historical study improve our understanding of sea level changes and variability around Australia, which will help us to project future sea level changes in coming decades with more confidence and reliability.
    Language: English
    Type: info:eu-repo/semantics/conferenceObject
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  • 6
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    Updating sea-level reconstruction since 1900 (2023)
    In:  XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
    Details
    Publication Date: 2023-05-25
    Description: Sea-level rise integrates the responses of several components (ocean thermal expansion, mass loss from glaciers and ice sheets, terrestrial water storage). Before the satellite era, global sea-level reconstructions depend on tide-gauge records and ocean observations. However, the available global mean sea level (GMSL) reconstructions using different methods indicate a spread in sealevel trend over 1900-2008 (1.3~2.0 mm/yr). With the improved understanding of the causes of sea-level change, here we update the original Church and White (2011) reconstruction by using the latest observations, taking the time-evolving sea-level fingerprint, sterodynamic sea level (SDSL) climate change pattern and local vertical land motion (VLM) into account. The updated trend of GMSL of 1.6 ± 0.2 mm/yr (90% confidence level) over 1900-2019 is consistent with the sum of contributions of 1.5 ± 0.2 mm/yr, slightly lower than 1.8 ± 0.2 mm/yr from original reconstruction. The lower trend from the updated reconstruction is mainly due to including residual VLM correction. The trends at tide gauge locations from updated reconstruction agree better with the tide gauge observations, with comparable mean trend of 1.7 mm/yr (standard deviation; STD of 2.0 mm/yr) from observation and 1.7 mm/yr (STD of 1.2 mm/yr) from the updated reconstruction. The inclusion of sea-level fingerprint and SDSL climate change pattern are the dominant contributors for improved reconstruction skill on regional scales at tide gauge locations. This update leads to GMSL solution that are consistent with other reconstructions in terms of long-term trend and 30-year running rate.
    Language: English
    Type: info:eu-repo/semantics/conferenceObject
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  • 7
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    Roles of surface forcing in the Southern Ocean temperature and salinity changes under increasing CO2 (2023)
    In:  XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
    Details
    Publication Date: 2023-07-31
    Description: A rapid warming and freshening of the Southern Ocean have been observed over the past several decades and are attributed to anthropogenic climate change. We conducted ocean model perturbation experiments to separate roles of individual surface forcing in the Southern Ocean temperature and salinity changes. Model-based findings are compared with results from a theoretical framework including three idealized processes defined on the θ-S diagram. Under the future scenario of CO2 doubling, the heat flux forcing dominates the large-scale warming, deepening of isopycnals, and spiciness changes along isopycnals, which can be captured by an idealized pure warming process to represent the subduction of surface heat uptake. The poleward-intensifying westerly winds account for 24% of the enhanced warming between 35°and 50°S and would have comparable contribution as the heat flux forcing after removing the global ocean warming effect. In contrast, the widespread freshening in the Southern Ocean driven by increased surface freshwater input is largely compensated by the wind-driven saltening. The response to freshwater forcing could not be approximated as a similar pure freshening process as the induced cooling and freshening have comparable effects on density. The wind-driven changes are primarily through the local heave of isopycnals, thus resembling an idealized pure heave process, but contain considerable spiciness signals especially in the midlatitude Southern Ocean, resulting from anomalous northward transport and subduction of heat and salt that are largely density-compensating. These distinct signatures of individual surface forcing help us to better understand observed and projected changes in the Southern Ocean.
    Language: English
    Type: info:eu-repo/semantics/conferenceObject
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  • 8
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    Understanding the Contribution of Ozone Changes in the Historical Sea Level Change (2023)
    In:  XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
    Details
    Publication Date: 2023-08-29
    Description: Changes in sea level are mostly driven by internal climate variability, and anthropogenic forcing. Moreover, changes in stratospheric and tropospheric Ozone during the second-half of the 20th century also cause significant changes in ocean heat uptake. A recent study has shown that both stratospheric and tropospheric ozone have contributed to the Southern Ocean warming in the deep ocean. This study has shown that the 30% of Southern Ocean warming during 1955-2000 is driven by ozone in the upper 2000 m of the ocean. Of this 30%, 60% is attributed to stratospheric and 40% to tropospheric ozone changes. Changes in ocean heat uptake consequently affect sea level and we assess these changes due to ozone. From the analysis of four CMIP6 models with a total of 28 ensemble members, we find that thermosteric sea level increases between 40-60 S and decreases between 60 S and the Antarctic peninsula. Hence, there is a gradient in thermosteric sea level established around 60 S with higher sea level on the equatorward side and lower sea level on the poleward side. The increased sea level in the Southern Ocean is plausibly related to an increase in the strength of westerlies due to ozone forcing that has helped to deposit more heat due to the intense churning of the subtropical gyres. Further investigations are required to quantify the changes in sea level due to ozone in comparison to aerosols, greenhouse gases, and their combination (i.e., historical trend) to explain the observed sea level changes.
    Language: English
    Type: info:eu-repo/semantics/conferenceObject
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