GLORIA

GEOMAR Library Ocean Research Information Access

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Magnetic field induced ordering in quasi-one-dimensional quantum magnets (2000)
    Springer
    The European physical journal 16 (2000), S. 393-396 
    Details
    ISSN: 1434-6036
    Keywords: PACS. 75.10.Jm Quantized spin models - 75.30.-m Intrinsic properties of magnetically ordered materials - 75.50.Ee Antiferromagnetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. Three-dimensional magnetic ordering transitions are studied theoretically in strongly anisotropic quantum magnets. An external magnetic field can drive quasi-one-dimensional subsystems with a spin gap into a gapless regime, thus inducing long-range three-dimensional magnetic ordering due to weak residual magnetic coupling between the subsystems. Compounds with higher spin degrees of freedom, such as N-leg spin-1/2 ladders, are shown to have cascades of ordering transitions. At high magnetic fields, zero-point fluctuations within the quasi-1D subsystems are suppressed, causing quantum corrections to the ordering temperature to be reduced.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100510070194
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Zur Bildung von tert-Butyl-Radikalen nach der Bestrahlung von Polymeren, die tert-Butoxy-carbonylthioäthylen-Einheiten enthalten (1977)
    Springer
    Colloid & polymer science 255 (1977), S. 817-817 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01664519
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    facet.materialart.
    Unknown
    Vertical ozone distribution in the marine atmsophere over the central Atlantic Ocean (56 S - 50 N) (1996)
    In:  EPIC3Journal of Geophysical ResearchD1, 101, pp. 1387-1399
    Details
    Publication Date: 2019-07-16
    Description: Abstract. The vertical ozone distribution over the Atlantic Ocean has been measured in situ by shipborne ozone soundings during three RV Polarstern meridional transects in January/February 1993, October/November 1993, and May/June 1994. The low ozone column densities measured by Nimbus 7 and Meteor 3 satellites in 1993 could be confirmed by our investigations. We observed distinct differences in the vertical distribution pattern of tropospheric ozone between the northern and the southern hemisphere: The ozone mixing ratio gradients were flat in the northern hemisphere and ozone mixing ratios in the free troposphere never did exceed 80 parts per billion by volume (ppbv) up to the tropopause, while the southern hemisphere exhibited a pronounced vertical gradient. Extremely dry air masses with enhanced ozone amounts up to 120 ppbv have been found in the tropical free troposphere of the southern hemisphere between 0° and 20°S. The vertical ozone stratification in the troposphere of the southern hemisphere was dominated by this large-scale feature. Photochemical ozone production as a consequence of the emissions of natural fires or intrusions of stratospheric air masses are the most probable sources for these ozone-rich layers. On the basis of our results, a stringent differentiation between both alternatives could not be given.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 4
    facet.materialart.
    Unknown
    Troposphärische Ozonvariationen in Polarregionen (1997)
    In:  EPIC3Reports on Polar Research, Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, 224, 188 p.
    Details
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: Thesis , notRev
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 5
    facet.materialart.
    Unknown
    Tropospheric ozone depletion and related aerosol chemistry at polar regions (1998)
    In:  EPIC3EGS-Abstracts Nice 1998
    Details
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 6
    facet.materialart.
    Unknown
    Tropospheric ozone depletion in polar regions - A comparison of observations in the Arctic and Antarctic (1998)
    In:  EPIC3Tellus, Vol. 50B, pp. 34-50
    Details
    Publication Date: 2019-12-03
    Description: ABSTRACTThe dynamics of tropospheric ozone variations in the Arctic (Ny-Ålesund, Spitsbergen, 79°N, 12°E) and in Antarctica (Neumayer-Station, 70°S, 8°W) were investigated for the period January 1993 to June 1994. Continuous surface ozone measurements, vertical profiles of tropospheric ozone by ECC-sondes, meteorological parameters, trajectories as well as ice charts were available for analysis. Informations about the origins of the advected air masses were derived from 5-days back-trajectory analyses. Seven tropospheric ozone minima were observed at Ny-Ålesund in the period from March to June 1994 during which the surface ozone mixing ratios decreased from typical background concentrations around 40 ppbv to values between 1 ppbv and 17 ppbv(1 ppbv O3 corresponds to one part of O3 in 109 parts of ambient air by volume). Four surface ozone minima were detected in August and September 1993 at Neumayer-Station with absolute ozone mixing ratios between 8 ppbv and 14 ppbv throughout the minima. At both measuring stations the ozone minima were detected during polar spring. They covered periods between 1 and 4 days (Arctic) and 1 and 2 days (Antarctica), respectively. Furthermore it was found that in both polar regions the ozone depletion events were confined to the planetary boundary layer with a capping temperature inversion at the upper limit of the ozone poor air mass. Inside this ozone poor layer a stable stratification was obvious. Back-trajectories analyses revealed that the ozone depleted air masses were transported across the marine, ice-covered regions of the central Arctic and the South Atlantic Ocean. These comparable observations in both polar regions suggest a similar ozone destruction mechanism which is responsible for an efficient ozone decay. Nevertheless distinct differences could be found regarding the vertical structure of the ozone depleted layers. In the Arctic the ozone poor layer developed from the surface up to a temperature inversion, whereas in the Antarctic elevated ozone depleted air masses due to the influence of catabatic surface winds were observed.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 7
    facet.materialart.
    Unknown
    Irregular ozone depletion events in the Antartic troposhere recorded at Neumayer Station in 1992 and 1993 (1998)
    In:  EPIC3Memoirs of National Institute of Polar Research, Special Issue, No. 52, pp. 89-101
    Details
    Publication Date: 2019-12-03
    Description: Abstract:Continuous surface ozone measurements and regular ECC ozone sonde launches were used, in order to study the dynamical processes during the formation of tropospheric ozone depletion events at Neumayer Station (70°S; 08°W) in 1992 and 1993. Meteorological data, weather charts, ice charts as well as trajectory calculations have been considered for this analysis. Altogether eight events of surface ozone minima were recorded, four of them from June to August 1992 and another four in the period from August to September in 1993, respectively. The duration of these low ozone events was about 1-2 days. During this time ozone mixing ratios varied between 8 ppbv and 24 ppbv. Ozone sonde data showed that those ozone poor layers were restricted to the planetary boundary layer up to a subsidence inversion, indicating their upper limit. In general, those ozone poor air masses were exposed by sunlight during transport across the ice covered Southern Ocean. Beside these general features, typical cases could be identified which might be explained by the special dynamical conditions in the Antarctic coastal region. In September 1993 two events with an elevated ozone poor layer were observed due to the influence of continental winds. In June 1992 an ozone minimum was also detected at Neumayer Station during polar night conditions. In this case the ozone depleted air mass was probably transported from sunlit regions located northward from Neumayer Station where the exposure by sunlight occurred.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , peerRev
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 8
    facet.materialart.
    Unknown
    Aerosol and ozone observations in the polar troposphere at Spitsbergen in spring 1994 (1997)
    In:  EPIC3Atmospheric Research, Vol. 44, pp. 175-189
    Details
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 9
    facet.materialart.
    Unknown
    Variability of ozone and aerosols in the polar atmosphere (1996)
    In:  EPIC3Memoirs of National Polar Research, Special Issue, 51, pp. 189-215
    Details
    Publication Date: 2019-07-16
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , peerRev
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 10
    facet.materialart.
    Unknown
    Troposphärische Ozonvariationen in Polarregionen = Tropospheric ozone variations in polar region (1997)
    Alfred Wegener Institute for Polar and Marine Research
    In:  EPIC3Berichte zur Polarforschung (Reports on Polar Research), Bremerhaven, Alfred Wegener Institute for Polar and Marine Research, 224, 188 p., ISSN: 0176-5027
    Details
    Publication Date: 2018-09-03
    Repository Name: EPIC Alfred Wegener Institut
    Type: "Berichte zur Polar- und Meeresforschung" , notRev
    Format: application/pdf
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...