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  • 2005-2009  (4)
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  • 1
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    Upper ocean momentum balances in the western equatorial Pacific on the intraseasonal time scale (2006)
    Details
    Publication Date: 2022-05-25
    Description: Author Posting. © The Authors, 2004. This is the author's version of the work. It is posted here by permission of Elsevier B. V. for personal use, not for redistribution. The definitive version was published in Deep Sea Research Part I: Oceanographic Research Papers 52 (2005): 749-765, doi:10.1016/j.dsr.2004.12.004.
    Description: Surface Meteorology, upper ocean current, and hydrographic measurements, collected along a repeated survey pattern and from a central mooring in the western equatorial Pacific during late 1992 to early 1993, were used to analyse upper ocean momentum balances on the intraseasonal time scale. Wind stresses derived from meteorological measurements were compared with numerical weather prediction products. Advection terms in the momentum equations were estimated by planar fits to the current and hydrographic data. Pressure gradient terms were derived from planar fits to the dynamic heights calculated from the hydrographic data, referenced by balancing the momentum equation in a selected layer below the mixed layer. Under prevailing westerly winds, westward pressure gradient forcings of 2x10-7 m s-2 were set up in the western equatorial Pacific, countering the surface wind, while the total advection tended to accelerate the eastward momentum in the surface layer. During both calm wind and westerly wind burst periods, zonal turbulent momentum fluxes estimated from the ocean budgets were comparable with those estimated from microstructure dissipation rate measurements and with zonal wind stresses, so that the zonal momentum could be balanced within error bars. The meridional momentum balances were noisier, which might be due to the fact that the short meridional length scale of the equatorial inertial-gravity waves could contaminate the dynamic signals in the mixed temporal/spatial sampling data, so that the meridional gradient estimates from the planar fits could be biased.
    Description: MF acknowledges the support of Strategic Research Fund for Marine Environment. RL and PH were supported by NSF grant OCE-9525986. RW and AP were supported by NSF Grants OCE- 9110559 and OCE-9110554, respectively.
    Repository Name: Woods Hole Open Access Server
    Type: Preprint
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    PAPER (OA)
  • 2
    Electronic Resource
    Electronic Resource
    Factors affecting the sporulation capacity during long-term storage of the aphid-pathogenic fungus Pandora neoaphidis grown on broomcorn millet (2005)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 245 (2005), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Aphid-pathogenic fungus, Pandora neoaphidis, grown on broomcorn millet possesses greater sporulation capacity (Cs) than aphid cadavers. The most sporulating cultures (32.0 × 104 spores millet−1 grain) with water content (Cw) of 48.7% were prepared by incubation at 20 °C for 15 days and used to study the effect of temperature and humidity on Cs during long-term storage. Cultures were sealed with paper to retain ambient humidity, with parafilm for saturated humidity, or kept in 85% and 98% RH chambers. The Cw and Cs were monitored during 200-day storage at 5–20 °C. The paper-sealed cultures at 5 °C, associated with 21–25% of Cw, were best preserved and their 120-day Cs was similar to that of the fresh cadavers. Consistently or variably high RH at 5 °C resulted in significantly higher Cw and lower Cs despite longer viability. The regimes at ?10 °C preserved the cultures for ?40 days. The observations fit well to the logistic model Cs= 35.28/{1 + exp[−2.36 + (−0.003Cw+ 0.001CwT)t]} (r2= 0.95) for all regimes of temperature (T) or Cs= 35.55/[1 + exp(−2.33 + 0.001Cwt)] (r2= 0.93) at 5 °C only. The rate of decline of Cs of −0.003Cw+ 0.001CwT or 0.001 Cw over days (t) highlights the primary effect of Cw. The daily Cs-decline rates obtained for the best-stored cultures and air-dried cadavers stored at 5 °C were surprisingly identical. The results suggest a possible cheap method for preparing and storing large quantities of P. neoaphiodis inocula.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/j.femsle.2005.03.015
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    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    The Influences of Size and Anisotropy Strength on Hysteresis Scaling for Anisotropy Heisenberg Multilayer Films (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 121-123 (Mar. 2007), p. 1085-1088 
    Details
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Notes: In this paper, we simulate the magnetization dynamic processes of the multilayer films,and calculate their hysteresis loop areas using Monte Carlo method. The simulated results indicatethat, the size and anisotropy strength of the anisotropy multilayer films influence evidently thedynamic phase transition, and the phase transition temperature increases with enhancing values ofthe anisotropy constant and layer thickness. It is also found that, with increasing number of layers offilms, the value of α decreases, while the magnitudes of β and γ increase. On the contrary, withincreasing anisotropy strength, the value of α increases, while the magnitudes of β and γ reduce
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/23/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.121-123.1085.pdf
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  • 4
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    Upper ocean momentum balances in the western equatorial Pacific on the intraseasonal time scale (2005)
    Elsevier
    In:  Deep Sea Research Part I: Oceanographic Research Papers, 52 (5). pp. 749-765.
    Details
    Publication Date: 2021-03-23
    Description: Surface meteorology, upper ocean current, and hydrographic measurements, collected along a repeated survey pattern and from a central mooring in the western equatorial Pacific during late 1992 to early 1993, were used to analyse upper ocean momentum balances on the intraseasonal time scale. Wind stresses derived from meteorological measurements were compared with numerical weather prediction products. Advection terms in the momentum equations were estimated by planar fits to the current and hydrographic data. Pressure gradient terms were derived from planar fits to the dynamic heights calculated from the hydrographic data, referenced by balancing the momentum equation in a selected layer below the mixed layer. Under prevailing westerly winds, westward pressure gradient forcings of 2 x 10 -7 ms -2 were set up in the western equatorial Pacific, countering the surface wind, while the total advection tended to accelerate the eastward momentum in the surface layer. During both calm wind and westerly wind burst periods, zonal turbulent momentum fluxes estimated from the ocean budgets were comparable with those estimated from microstructure dissipation rate measurements and with zonal wind stresses, so that the zonal momentum could be balanced within error bars. The meridional momentum balances were noisier, which might be due to the fact that the short meridional length scale of the equatorial inertial-gravity waves could contaminate the dynamic signals in the mixed temporal/spatial sampling data, so that the meridional gradient estimates from the planar fits could be biased.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1016/j.dsr.2004.12.004
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    OceanRep: Article in a Scientific Journal - peer-reviewed
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