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  • 1
    Monograph available for loan
    Monograph available for loan
    Report of the earth observation user consultation meeting (1991)
    Paris : ESA
    Associated volumes
    Details Availability
    Call number: PIK N 531-92-0385
    In: Special publications
    Type of Medium: Monograph available for loan
    Pages: 289 p.
    Series Statement: ESA SP - 1143
    Location: A 18 - must be ordered
    Branch Library: PIK Library
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  • 2
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    The Cape Cauldron: A regime of turbulent inter-ocean exchange (2003)
    In:  EPIC3Deep-sea research ii, 50(1), pp. 57-86
    Details
    Publication Date: 2019-07-17
    Description: Combining in-situ Lagrangian intermediate depth velocity measurements from the KAPEX (Cape of Good Hope Experiments) float program with sea-surface height data, this study reviews the inter-ocean exchange mechanisms around southern Africa. In the southeastern Cape Basin, a highly energetic field of coexisting anticyclonic and cyclonic eddies is documented. Agulhas Rings of typically 200 km diameter are observed to merge, split, deform, and to reconnect to the Agulhas Retroflection. Concomitant, slightly smaller cyclones are observed to drift across the northwestward migration path of the Agulhas Rings. These cyclones, with typical diameters of 120 km, are formed within the Cape Basin along the African shelf, inshore of the Agulhas Current, and in the subantarctic region south of Africa.The data suggests the annual formation of 3-6 long-lived Agulhas Rings, that eventually cross 5°E longitude, while approximately twice the number of rings occur in the southeastern Cape Basin. Within this region, cyclones outnumber anticyclones by a factor of 3:2. Both cyclones and anticyclones extend through the upper thermocline into the intermediate depth layer. Mean drifts of anticyclones are 3.8 ± 1.2 cm s-1 to the northwest, while cyclones follow a west-southwestward route at 3.6 ± 0.8 cm s-1. Transport estimates suggest that the intermediate depth layer in the southeastern Cape Basin is primarily supplied from the east (approximately 9 Sv) with minor direct inflow from the Atlantic to the west and south.Cyclone/anticyclone interaction is surmised to result in vigorous stirring and mixing processes in the southeastern Cape Basin, which necessitates a review of the traditional concept of Indo-Atlantic inter-ocean exchange. We propose to limit the concept of ?isolated Agulhas Rings embedded in a sluggish Benguela Drift? to the northwestern Cape Basin and beyond, while linking this regime to the Agulhas Retroflection proper through a zone of turbulent stirring and mixing in the southeastern Cape Basin, named for the first time the ?Cape Cauldron? hereinafter.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 3
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    Path and variability of the Agulhas Return Current (2003)
    In:  EPIC3Deep-sea research ii, 50(1), pp. 35-56
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    Publication Date: 2019-07-17
    Description: The combined analysis of hydrographic, kinematic and dynamic data collected during the 1997-1999 KAPEX (CAPe of Good Hope EXperiments) reveals a quasi-stationary meandering pattern of the Agulhas Retroflection Current east and upstream of the Southwest-Indian Ridge. The current meanders between 38°S and 40°S in a spatially and temporally continuous fashion and has a core width of approximately 70 km with an associated transport of 44 ± 5 106 m3 s-1 in the upper 1000 m. Peak surface velocities decrease from 2.1 m s?1 near the Agulhas Retroflection to 1.1 m s-1 around 32°E. Meander troughs (northward extremes) are found predominantly near 26.8°E, 32.6°E and 38.9°E, while crests (southward extremes) are located with high probability near 29.7°E, 35.5°E and 42.9°E, resulting in a typical wavelength of 500 km. Cold eddies are shed along the northern boundary of the current from meander troughs into the recirculation regime between the Agulhas Current proper and the Agulhas Return Current. Strongest cyclonic eddies are preferably shed in austral autumn. The cyclonic eddies so formed propagate westward at an average phase-speed of 5.4 cm s-1, with however, a variability of at least the same magnitude. Subsequently, the cyclones are absorbed by the next meander trough located upstream and to the west of the shedding trough.
    Repository Name: EPIC Alfred Wegener Institut
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  • 4
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    A comparison of in-situ float velocities with altimeter derived geostrophic velocities (2003)
    In:  EPIC3Deep-sea research ii, 50(19), pp. 119-139
    Details
    Publication Date: 2019-07-17
    Description: Satellite borne altimetric data are of increasing prominence for assimilation in ocean circulation models and interpretation of localized in-situ measurements. Physically, geo-referenced sea surface height (SSH) data products are mostly referenced relative to a long-term SSH mean, and consequently called SSH-anomalies. The Modular Ocean Data Assimilation System (MODAS) adds climatological SSH fields to provide space-time interpolated absolute steric SSH fields. This, in theory, should provide realistic geostrophic surface velocities and flow patterns, including quasi-permanent features such as western boundary currents or free jets. This study compares such data for the wider Agulhas Retroflection region with co-located, simultaneous velocity measurements from KAPEX (Cape of Good Hope Experiments). KAPEX used ship-borne Acoustic Doppler Current Profiles (ADCP) and neutrally buoyant RAFOS (Ranging And Fixing Of Sound) floats at intermediate depths to obtain in-situ velocity data.Correlation coefficients of MODAS-2D geostrophic and RAFOS subsurface flow directions fall between 0.8 and 0.9 with a typical error less than 0.05. The high correlation suggests that MODAS-2D provides a correct depiction of anticyclonic/cyclonic flow patterns in this region, making it a useful tool to describe the Agulhas Retroflection. Root-mean-square differences between velocities as measured by the various data sources rage between 20-30 cm s-1, lying between the natural variability observed for the intermediate and surface layers. Decreasing slope parameters of linear regressions between MODAS, RAFOS and ADCP velocities reflect the baroclinic velocity shear. Slope equals 1 at surface and decreases to 0.4 at depths below 1000 m. Offsets of linear regression of these fits are not significantly different from zero, except for the zonal component in the Agulhas Return Current (5 to 10 cm s-1). This discrepancy suggests a missing meridional gradient in this region?s climatological signal that is added to the SSH anomaly field within MODAS.
    Repository Name: EPIC Alfred Wegener Institut
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  • 5
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    Early evolution of an Agulhas Ring (2003)
    In:  EPIC3Deep-sea research ii, 50(1), pp. 141-166, ISSN: 0967-0645
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    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
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  • 6
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    Mixing of Antarctic Intermediate Water from the Atlantic and Indian Ocean at the Agulhas Retroflection (2000)
    In:  EPIC3Int. WOCE Newsletter, 39, pp. 9-12
    Details
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
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  • 7
    Electronic Resource
    Electronic Resource
    Thermodynamic Properties of Isobutylene. (1962)
    s.l. : American Chemical Society
    Journal of chemical & engineering data 7 (1962), S. 394-397 
    Details
    ISSN: 1520-5134
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/je60014a026
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  • 8
    Electronic Resource
    Electronic Resource
    Modified Atmosphere Packaging of Cultivated Mushroom (Agaricus bisporus L.) with Hydrophilic Films (2002)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 67 (2002), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: : Unique gas barrier properties of hydrophilic films (wheat gluten-based material and synthetic polymer) have been tested through practical application such as modified atmosphere packaging. Mushrooms have been packed under microporous and hydrophilic films and stored at 10 °C and 20 °C under high relative humidity (〉 92%). Atmospheric and quality changes (cap opening, color) were assessed during storage. Unique steady state atmospheres, poor in both oxygen and carbon dioxide, were observed, regardless of the temperature and the hydrophilic film used, owing to their high selectivity to gas diffusion. A transitional phase characterized by a CO2 partial pressure peak has been evidenced and could imply quality change. The proposed MAP model fit experimental data with a mean error of 0.88 kPa.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.2002.tb11393.x
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  • 9
    Electronic Resource
    Electronic Resource
    Energy Balance of Low Hydrated Starches Transition Under Shear (2002)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 67 (2002), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Moistened (25% to 30% total basis) starches were processed on a pre-shearing rheometer under controlled conditions of temperature, residence time, and shear rate. The specific mechanical energy (30 to 1000 J.g-1) was measured and starch transformations assessed. The conversion of compacted native starch into a suspension of granule fragments in a melt was modeled by a simplified energy balance of the shearing zone. A theoretical fragmentation mechanism was proposed with a critical fracture energy of 125 J.m-2. The computed mechanical energy and time necessary for achieving this transition varied in agreement with experimental results, for different operating conditions and starch botanical origins. Interparticle friction influenced granule fragmentation, whereas crystal melting was associated with viscous dissipation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.2002.tb10301.x
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  • 10
    Electronic Resource
    Electronic Resource
    An assay for quantitative nucleic acid hybridization on membrane filters
    Amsterdam : Elsevier
    Analytical Biochemistry 182 (1989), S. 280-283 
    Details
    ISSN: 0003-2697
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0003-2697(89)90594-0
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