tindex.rst - pism - [fork] customized build of PISM, the parallel ice sheet model (tillflux branch)
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       tindex.rst (1201B)
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            1 .. include:: ../../global.txt
            2 
            3 .. _sec-validation:
            4 
            5 Validation case studies
            6 =======================
            7 
            8 
            9 "Validation" describes the comparison of numerical model output with physical observations
           10 in cases where the observations are sufficiently-complete and of sufficient quality so
           11 that the performance of the numerical model can be assessed :cite:`Roache`, :cite:`Wesseling`.
           12 Roughly speaking, validation can happen when the observations or data are better than the
           13 model, so the comparison measures the quality of the numerical model and not merely errors
           14 in, or incompleteness of, the data. Because of the difficulty of measuring boundary
           15 conditions for real ice flows, this situation is not automatic in glaciology, or even
           16 common.\ [#]_ Nonetheless we try two cases, first where PISM is applied on
           17 millimeter scale to model a laboratory experiment, and second for a large-scale ice flow
           18 in which all uncertainties of bedrock topography, basal sliding, and subglacial hydrology
           19 are removed, namely a present-day ice shelf.
           20 
           21 .. toctree::
           22 
           23    labgum.rst
           24 
           25    ross.rst
           26 
           27 .. rubric:: Footnotes
           28 
           29 .. [#] Which explains the rise of "simplified geometry intercomparisons"; see section
           30        :ref:`sec-simp`.