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    The Effects of Bias Error and System Noise on Parameters Computed from C, T, P and V Profiles

    Source: Journal of Physical Oceanography:;1979:;Volume( 009 ):;issue: 001::page 199
    Author:
    Gregg, M. C.
    DOI: 10.1175/1520-0485(1979)009<0199:TEOBEA>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: The development of high-resolution profiling instruments has made possible the computation of quantities such as the stability parameter N2 and the Richardson number Ri over scales of less than a meter. Quality control of the data has been done on an ad hoc basis by individual investigators who have used varying degrees of restraint in the claims made for the final results. As the amount of high-resolution data increases and as the parameters computed from it are used in statistical studies a more objective approach is required. Profiting instruments are subject to a wide variety of difficulties, many of which are particular to the individual systems. Common to all, however, are errors due to uncertainties in the absolute calibrations of temperature T, conductivity C and pressure P, and noise in the sensors or data systems. Linearized equations for salinity S and specific volume α have been found to give good estimates of the errors resulting from typical values of calibration uncertainties and noise in T, C and P. Using these equations expressions have been developed for the evaluation of corresponding uncertainties and noise in N2, Ri and dynamic height anomaly as well as in maps of T and S on potential specific volume surfaces. These estimates represent the best that can be obtained if the instrument system has no other difficulties. Numerical examples for several instrument systems in current use show that significant errors can occur over scales as large as tens of meters.
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      The Effects of Bias Error and System Noise on Parameters Computed from C, T, P and V Profiles

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    contributor authorGregg, M. C.
    date accessioned2017-06-09T14:44:58Z
    date available2017-06-09T14:44:58Z
    date copyright1979/01/01
    date issued1979
    identifier issn0022-3670
    identifier otherams-25896.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4162729
    description abstractThe development of high-resolution profiling instruments has made possible the computation of quantities such as the stability parameter N2 and the Richardson number Ri over scales of less than a meter. Quality control of the data has been done on an ad hoc basis by individual investigators who have used varying degrees of restraint in the claims made for the final results. As the amount of high-resolution data increases and as the parameters computed from it are used in statistical studies a more objective approach is required. Profiting instruments are subject to a wide variety of difficulties, many of which are particular to the individual systems. Common to all, however, are errors due to uncertainties in the absolute calibrations of temperature T, conductivity C and pressure P, and noise in the sensors or data systems. Linearized equations for salinity S and specific volume α have been found to give good estimates of the errors resulting from typical values of calibration uncertainties and noise in T, C and P. Using these equations expressions have been developed for the evaluation of corresponding uncertainties and noise in N2, Ri and dynamic height anomaly as well as in maps of T and S on potential specific volume surfaces. These estimates represent the best that can be obtained if the instrument system has no other difficulties. Numerical examples for several instrument systems in current use show that significant errors can occur over scales as large as tens of meters.
    publisherAmerican Meteorological Society
    titleThe Effects of Bias Error and System Noise on Parameters Computed from C, T, P and V Profiles
    typeJournal Paper
    journal volume9
    journal issue1
    journal titleJournal of Physical Oceanography
    identifier doi10.1175/1520-0485(1979)009<0199:TEOBEA>2.0.CO;2
    journal fristpage199
    journal lastpage217
    treeJournal of Physical Oceanography:;1979:;Volume( 009 ):;issue: 001
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
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