Posted: Tue May 3  1994 10:49 EDT
   From: C.Garside
     To: EQPAC.PI
     Cc: G.Heimerdinger
Subject: TT007/011 NO3 vs TS misfits

Hi Folks,
            Jean and I have been constructing algorithms relating nitrate to
T/S data. The following abstract of our paper for the EqPac DSR volume
describes what we did:

            Algorithms relating nutrient concentrations to density have been
available for parts of the deep ocean for many years. Similar algorithms for
the euphotic zone have proved to be elusive because of the relatively dynamic
nature of nutrient and other processes there. However, if the hydrographic
parameterization is recast to reflect these processes, remarkably good
predictions of nutrient concentrations are possible. We present examples
regionally and from the spring bloom in the North Atlantic, and for the el
Nino and la Nina conditions in the central Pacific. Nitrate concentrations
can be predicted with a standard error of 0.5-1.0 fM or better. Possible
applications of such algorithms include data QA/QC, retro-fitting and
interpolating the nutrient data coverage of mooring and cruise data sets,
and remote sensing and improved regional estimates of new production.

            The following list contains all samples from the upper 125m only
for TT007 and TT011 for which the measured nitrate falls outside the 95%
confidence level of the prediction. What this implies is that there is a poor
match between the measured nitrate and the associated T/S data. This may
arise from bottle mistrips, leaking bottles or analytical problems, but we
cannot really diagnose specifics in all cases.

            If mistrips are the problem the mismatch is most likely to be
obvious in the pycnocline and nitracline where all three properties we use
change rapidly. At greater and lesser depths on the same cast an offset of
T/S data relative to NO3 may not be sufficient to cause a large enough
discrepancy for us to flag the sample. Simply, although we may flag only
pycnocline bottles, the entire cast might be off. In other cases the same
bottle seems to be anomalous cast after cast, and this might suggest a leaker
that was not detected immediately.

            We suggest that you use this list in conjunction with Jim
Murray's list of samples they flagged for other reasons, to decide what you
want to believe about the integrity of any samples you have from these same
bottles. 


 Cruise     Sta    CTD     -Z    Temp BOT SAL   Salin Sigma-t     NO3

  TT007       1      5  -61.5   20.64  34.502  34.572  24.268    0.42
  TT007       1      5  -72.4   18.30  34.538  34.517  24.828    4.55
  TT007       1      5  -82.2   16.56  34.526  34.498  25.233    9.26
  TT007       1      5 -101.9   13.55  34.353  34.393  25.811   22.01
  TT007       1      5 -122.1   11.63  34.270  34.270  26.093   23.57
  TT007       1      6  -74.3   20.89      NA  34.539  24.174    0.38
  TT007       1      6  -84.8   18.27      NA  34.519  24.838    3.47
  TT007       1      6  -94.4   16.37      NA  34.468  25.255    8.71
  TT007       1      6 -115.5   13.70      NA  34.372  25.764   16.70
  TT007       1      7  -73.3   19.99  34.510  34.496  24.381    2.05
  TT007       1      7  -84.7   17.20  34.537  34.468  25.059    7.07
  TT007       1      7 -103.4   14.34  34.366  34.363  25.625    8.70
  TT007       1      8  -74.4   20.91      NA  34.578  24.198    0.38
  TT007       1      8  -82.5   19.38      NA  34.558  24.587    5.60
  TT007       1      8 -102.1   16.02      NA  34.438  25.312   10.05
  TT007       1      8 -112.7   14.27      NA  34.354  25.633   19.65
  TT007       1      8 -122.7   12.83      NA  34.301  25.886   23.30
  TT007       1     10  -64.2   21.97  34.411  34.490  23.841    0.00
  TT007       1     10  -73.9   20.30  34.570  34.568  24.353    0.19
  TT007       1     10  -85.0   17.83  34.568  34.450  24.894    2.41
  TT007       1     10  -95.5   16.45  34.471  34.481  25.246    7.83
  TT007       1     10 -103.8   15.19  34.468  34.418  25.483   10.93
  TT007       1     10 -113.7   13.76  34.364  34.336  25.724   12.63
  TT007       1     13 -122.2   12.71      NA  34.329  25.931   18.04
  TT007       1     14  -74.4   21.60  34.525  34.517  23.962    0.00
  TT007       1     14 -103.7   15.20  34.404  34.421  25.482    5.77
  TT007       1     14 -113.2   14.09  34.346  34.353  25.669   15.07
  TT007       1     14 -124.1   12.99  34.310  34.293  25.847   16.08
  TT007       2     15  -76.3   23.47      NA  34.348  23.305    0.63
  TT007       2     15  -87.1   17.16      NA  34.467  25.069    6.16
  TT007       2     15  -96.2   15.15      NA  34.474  25.534   21.27
  TT007       2     15 -106.5   13.79      NA  34.552  25.885   25.36
  TT007       2     15 -116.7   13.02      NA  34.626  26.100   27.40
  TT007       2     16  -72.3   20.50  34.565  34.572  24.305    3.40
  TT007       2     16  -83.0   15.46  34.481  34.480  25.470   18.77
  TT007       2     16  -92.3   14.21  34.527  34.508  25.765   25.45
  TT007       2     16 -103.0   13.36  34.591  34.609  26.017   27.19
  TT007       2     18  -72.7   22.65      NA  34.442  23.612    1.66
  TT007       2     18  -83.8   15.96      NA  34.473  25.352   14.72
  TT007       2     18  -92.5   14.23      NA  34.498  25.751   24.24
  TT007       2     18 -104.2   13.52      NA  34.575  25.960   27.76
  TT007       2     18 -112.0   12.64      NA  34.640  26.185   29.84
  TT007       2     19  -84.0   16.91      NA  34.492  25.148   19.73
  TT007       2     20  -63.7   19.37  34.576  34.523  24.562    3.57
  TT007       2     20  -73.9   16.78  34.496  34.501  25.183   13.49
  TT007       2     20  -85.3   14.03  34.496  34.516  25.808   22.37
  TT007       2     20 -115.0   11.89  34.660  34.669  26.353   30.59
  TT007       2     20 -124.0   11.68  34.673  34.686  26.407   31.25
  TT007       2     23  -71.6   21.20  34.251  34.595  24.133    0.29
  TT007       2     23  -81.6   16.95  34.498  34.498  25.142   12.55
  TT007       2     23  -91.3   14.46  34.482  34.491  25.697   20.85
  TT007       2     26  -63.4   26.87  34.444  34.212  22.169    3.01
  TT007       2     26  -73.5   20.08  34.493  34.549  24.399   12.98
  TT007       2     26  -83.3   15.65  34.481  34.468  25.419   20.59
  TT007       2     26  -93.0   13.53  34.583  34.575  25.957   27.16
  TT007       3     30  -74.4   25.19      NA  34.817  23.146    3.69
  TT007       3     30  -83.7   24.32      NA  34.820  23.412    4.80
  TT007       3     30  -93.4   22.69      NA  34.808  23.880    6.44
  TT007       3     30 -104.7   20.63      NA  34.787  24.433    5.35
  TT007       3     35  -73.4   26.76      NA  34.635  22.522    1.06
  TT007       3     35  -82.0   24.47      NA  34.813  23.363    4.43
  TT007       3     35  -92.3   22.23      NA  34.813  24.013    5.54
  TT007       3     35 -103.3   20.17      NA  34.763  24.537    5.64
  TT007       3     35 -123.0   17.60      NA  34.714  25.152   14.66
  TT007       3     36  -74.4   24.81  34.817  34.820  23.264    4.35
  TT007       3     36  -84.3   23.66      NA  34.818  23.607    5.11
  TT007       3     36  -94.0   21.99  34.785  34.801  24.072    4.88
  TT007       3     37  -83.9   24.85      NA  34.818  23.252    3.59
  TT007       3     37 -103.9   21.60      NA  34.786  24.169    5.30
  TT007       3     37 -123.4   17.70      NA  34.713  25.127   14.63
  TT007       3     38  -87.0   24.56  34.821  34.814  23.334    4.69
  TT007       3     38  -97.5   23.11  34.810  34.826  23.772    5.14
  TT007       3     38 -107.5   20.13  34.768  34.760  24.547    7.93
  TT007       4     40  -92.9   27.96      NA  34.697  22.181    3.71
  TT007       4     45 -112.6   23.82      NA  34.849  23.581   10.07
  TT007       4     46  -92.9   27.54  34.840  34.743  22.352    5.82
  TT007       4     47 -114.2   23.97      NA  34.850  23.538   10.09
  TT007       4     48 -110.8   24.79      NA  34.848  23.291    9.33
  TT007       5     51 -113.3   23.03      NA  34.847  23.810   11.61
  TT007       5     51 -123.5   16.76      NA  34.708  25.349   21.23
  TT007       5     57 -113.0   27.85  34.906  34.874  22.350    5.15
  TT007       5     58 -122.3   24.40      NA  34.862  23.420    9.83
  TT007       5     60 -111.8   25.95      NA  34.867  22.951    8.14
  TT007       5     60 -121.8   22.62      NA  34.840  23.922   13.54
  TT007       6     67 -112.4   26.42      NA  34.911  22.835    3.76
  TT007       6     67 -122.4   24.99      NA  34.899  23.271    5.68
  TT007       6     69 -120.9   22.04      NA  34.828  24.078   13.90
  TT007       6     71 -122.4   20.99      NA  34.803  24.347   13.92
  TT007       6     73 -102.9   27.19  34.905  34.909  22.590    7.11
  TT007       6     73 -112.4   24.06  34.859  34.864  23.523   10.39
  TT007       6     73 -123.1   21.71  34.830  34.813  24.157   12.91
  TT007       7     77 -123.8   23.84      NA  34.929  23.637   12.16
  TT007       7     80 -114.5   23.34      NA  34.904  23.764   12.00
  TT007       7     80 -124.7   16.55      NA  34.753  25.433   17.97
  TT007       7     81 -123.0   20.89  34.833  34.832  24.398   14.68
  TT007       7     82 -113.1   25.37      NA  34.949  23.191    9.53
  TT007       7     82 -123.3   22.24      NA  34.870  24.052   14.56
  TT007       7     84 -124.6   21.65  34.876  34.861  24.211   11.74
  TT007       7     88 -122.9   23.55      NA  34.867  23.675   11.58
  TT007       8     90 -113.8   27.60      NA  35.241  22.709    7.37
  TT007       8     90 -122.4   22.54      NA  35.168  24.195   13.39
  TT007       8     94 -114.3   22.60  35.219  35.209  24.209   13.35
  TT007       8     94 -123.7   16.86  35.171  35.184  25.689   16.53
  TT007       8     95 -102.0   25.10      NA  35.262  23.512   10.82
  TT007       8     95 -111.8   21.59      NA  35.155  24.450   13.90
  TT007       8     95 -121.3   16.33      NA  35.125  25.769   16.36
  TT007       8     97 -120.9   15.69  35.130  35.059  25.863   16.20
  TT007       8    100 -124.1   15.59      NA  35.057  25.885   15.79
  TT007       8    102 -122.1   17.78  35.270  35.235  25.508   14.00
  TT007      10    120 -102.5   26.03      NA  35.691  23.547    4.52
  TT007      10    120 -123.1   20.13      NA  35.450  25.072   18.18
  TT007      10    122 -122.8   22.30  35.482  35.533  24.540   13.32
  TT007      10    126 -121.5   20.42      NA  35.479  25.016   17.47
  TT007      10    128 -123.7   20.77      NA  35.496  24.936   15.13
  TT007      11    132 -123.4   26.47      NA  35.596  23.337    4.78
  TT007      12    139 -123.4   27.08      NA  35.491  23.063    3.81
  TT007      12    144 -122.7   27.06      NA  35.498  23.077    3.72
  TT007      12    147 -123.4   26.90      NA  35.527  23.151    3.88
  TT007      13    148 -112.7   27.27  36.112  35.577  23.068    2.69
  TT007      13    148 -123.4   27.22      NA  36.220  23.569    1.92
  TT007      14    149 -119.5   25.23  36.441  36.443  24.363    0.93
  TT007      15    152  -65.0   27.96      NA  36.224  23.330    0.19
  TT007      15    152  -74.1   27.14      NA  36.492  23.800    0.19
  TT007      15    155  -73.8   27.91  36.321  36.246  23.364    0.26
  TT007      15    155  -83.9   27.11  36.510  36.501  23.816    0.25
  TT007      15    159  -63.9   27.65      NA  36.404  23.569    0.19
  TT007      15    159 -114.2   25.43      NA  36.558  24.389    0.22
  TT007      15    159 -124.0   24.89      NA  36.471  24.490    0.52
  TT007      15    161  -63.1   27.93  36.438  36.237  23.350    0.13
  TT007      15    161 -123.7   25.09  36.459  36.475  24.430    1.08
  TT007      15    162  -62.5   28.06      NA  36.149  23.241    0.00
  TT007      15    162  -73.1   27.38      NA  36.439  23.682    0.00
  TT007      15    162 -113.1   25.44      NA  36.495  24.338    0.22
  TT007      15    162 -123.7   24.89      NA  36.455  24.477    0.44
  TT007      15    164  -75.4   28.06      NA  36.152  23.245    0.08
  TT007      15    164  -85.1   27.31      NA  36.463  23.723    0.00

  TT011       1      1  -93.8  19.833  34.473  34.467  24.401    2.15
  TT011       1      1   -104  17.630  34.466  34.474  24.960    4.91
  TT011       1      1 -123.5  14.043      NA  34.435  25.743   20.08
  TT011       1      3  -89.7  18.970  34.499  34.505  24.652    4.03
  TT011       1      5    -94  21.392      NA  34.466  23.982    1.17
  TT011       1      5 -103.9  19.227      NA  34.534  24.608    2.14
  TT011       1      5 -113.6  17.723      NA  34.484  24.946    4.16
  TT011       1      5 -122.5  16.128      NA  34.383  25.244    9.21
  TT011       1      6  -91.1  19.342  34.485  34.504  24.556    1.96
  TT011       1      6  -99.6  17.659  34.489  34.476  24.955    3.88
  TT011       1      6 -108.9  15.853  34.371  34.357  25.287    9.25
  TT011       1      7  -90.6  19.081      NA  34.533  24.645    1.06
  TT011       1      7 -100.3  16.915      NA  34.437  25.103    4.30
  TT011       1      7 -109.5  14.942      NA  34.331  25.469   11.88
  TT011       1      9  -83.2  21.416  34.480  34.498  24.000    1.00
  TT011       1      9 -104.2  16.066  34.379  34.385  25.260    9.57
  TT011       1     13  -89.9  20.472  34.478  34.477  24.239    0.99
  TT011       1     13  -99.3  18.305      NA  34.522  24.832    2.93
  TT011       1     13 -110.9  15.578  34.352  34.348  25.342    8.88
  TT011       2     18    -90  19.309      NA  34.487  24.551   10.82
  TT011       2     18 -100.5  15.523      NA  34.521  25.488   24.92
  TT011       2     18 -109.5  14.016      NA  34.591  25.868   31.71
  TT011       2     20  -70.3  26.455  34.634  34.643  22.624    0.43
  TT011       2     20  -90.5  18.920  34.507  34.509  24.668    8.81
  TT011       2     20 -100.1  15.528  34.524  34.535  25.497   20.01
  TT011       2     20 -109.9  14.415  34.578  34.588  25.782   24.76
  TT011       2     23  -70.6  26.471      NA  34.640  22.616    0.21
  TT011       2     23   -100  15.606      NA  34.543  25.486   22.26
  TT011       2     24  -69.6  27.039  34.643  34.642  22.438    0.30
  TT011       2     24  -99.6  15.758  34.515  34.512  25.428   19.02
  TT011       2     24   -120  13.778  34.599  34.610  25.933   28.57
  TT011       2     25  -79.8  26.714      NA  34.562  22.481    0.17
  TT011       2     25 -100.3  17.357      NA  34.495  25.043   13.35
  TT011       2     25   -110  15.288      NA  34.556  25.567   20.55
  TT011       2     27  -99.9  21.369  34.509  34.506  24.019    9.06
  TT011       3     37    -99  25.162  34.580  34.570  22.969    0.98
  TT011       3     42 -100.1  24.869  34.666  34.560  23.051    0.58
  TT011       4     43 -119.7  23.063      NA  34.876  23.823    3.02
  TT011       5     58  -49.7  26.847      NA  34.571  22.446    0.17
  TT011       5     58  -81.1  24.239      NA  34.826  23.441    3.52
  TT011       5     58  -90.2  23.446      NA  34.919  23.744    4.96
  TT011       5     58 -106.6  21.271      NA  34.819  24.284   10.06
  TT011       5     58 -118.4  16.726      NA  34.856  25.469   20.94
  TT011       5     62  -59.1  26.674  34.680  34.549  22.483    3.33
  TT011       5     62  -80.5  25.407  34.855  34.742  23.024    5.93
  TT011       5     65 -118.7  21.262  34.809  34.829  24.294   12.66
  TT011       5     67 -119.3  22.210      NA  34.923  24.102   11.33
  TT011       6     68  -89.7  23.475      NA  35.014  23.808   10.33
  TT011       6     68   -100  23.377      NA  35.016  23.838   11.49
  TT011       6     72  -89.8  23.421      NA  35.031  23.837   10.91
  TT011       6     72 -100.1  23.371      NA  35.024  23.846    9.97
  TT011       6     72 -110.4  18.099      NA  34.835  25.122   24.48
  TT011       6     72 -119.1  15.616      NA  34.864  25.731   24.98
  TT011       6     74 -120.4  17.714  34.859  34.838  25.219   18.97
  TT011       6     75  -99.8  23.404      NA  35.020  23.833    8.96
  TT011       6     75 -110.5  23.304      NA  35.017  23.860   15.91
  TT011       6     75 -120.1  18.587      NA  34.827  24.995   22.29
  TT011       6     79   -100  18.319      NA  34.848  25.078   17.27
  TT011       6     79 -120.7  14.791      NA  34.924  25.960   24.30
  TT011       6     82    -91  22.200  34.913  34.866  24.061    8.97
  TT011       6     82  -99.7  19.036      NA  34.808  24.866   13.86
  TT011       6     82 -109.9  16.063  34.864  34.850  25.619   22.49
  TT011       7     84 -100.1  22.722      NA  34.911  23.948    8.98
  TT011       7     84 -109.8  22.291      NA  34.923  24.080    9.35
  TT011       7     84 -119.9  20.917      NA  34.840  24.396   11.00
  TT011       7     86 -110.3  21.427  34.862  34.862  24.273   11.00
  TT011       7     86 -119.3  18.070      NA  34.783  25.090   15.43
  TT011       7     87  -99.7  22.864  34.892  34.895  23.895    8.73
  TT011       7     89  -89.5  23.099  34.903  34.898  23.829    8.40
  TT011       7     89  -99.4  22.466  34.901  34.906  24.017    9.48
  TT011       7     89 -110.5  21.145  34.845  34.838  24.333   11.23
  TT011       7     89 -120.5  17.635  34.788  34.773  25.188   17.46
  TT011       7     91  -89.9  22.595      NA  34.909  23.982   10.73
  TT011       7     91  -99.7  20.745      NA  34.830  24.435   13.57
  TT011       7     91 -110.2  18.247      NA  34.789  25.050   18.23
  TT011       7     91   -120  15.791      NA  34.784  25.630   22.34
  TT011       8     92 -100.1  18.881  35.108  35.095  25.125   12.24
  TT011       8     92 -110.1  17.714  35.040  35.054  25.385   13.59
  TT011       8     92 -119.6  17.404  35.037  35.043  25.452   14.46
  TT011       8     93 -110.8  18.643      NA  35.057  25.157   12.97
  TT011       8     93 -120.1  16.936      NA  34.965  25.503   14.21
  TT011       8     95  -80.5  23.656  35.168  35.170  23.873    9.86
  TT011       8     95  -90.5  22.751  35.154  35.166  24.133   10.86
  TT011       8     98 -118.8  19.300      NA  35.076  25.003   11.79
  TT011       8     99 -118.2  18.479  35.098  35.013  25.164   13.39
  TT011       8    107  -99.9  20.566      NA  35.009  24.620    9.40
  TT011       8    107 -119.6  18.769      NA  35.091  25.151   13.48
  TT011       9    108 -100.6  22.436      NA  35.601  24.553   11.46
  TT011       9    110  -99.3  22.101  35.599  35.606  24.652   11.75
  TT011       9    110 -119.7  18.942      NA  35.411  25.352   13.76
  TT011       9    112 -100.7  20.714  35.552  35.582  25.016   13.68
  TT011       9    116 -100.2  21.031  35.569  35.603  24.946   14.28
  TT011       9    116 -117.6  17.981  35.384  35.380  25.569   14.87
  TT011       9    118  -59.4  23.482      NA  35.543  24.207    6.68
  TT011       9    118  -90.5  19.919      NA  35.558  25.210   14.57
  TT011       9    118 -100.3  19.389      NA  35.540  25.335   15.80
  TT011       9    118 -121.2  17.194      NA  35.325  25.718   22.10
  TT011      10    123  -79.1  23.945  35.526  35.730  24.213    4.96
  TT011      10    123  -89.4  21.907  35.806  35.789  24.845    6.42
  TT011      10    124  -99.5  22.996      NA  35.842  24.575    5.65
  TT011      10    124 -110.2  21.320      NA  35.766  24.991    8.43
  TT011      10    126 -119.7  18.906  35.288  35.546  25.464   20.80
  TT011      10    127 -109.6  23.394      NA  35.835  24.454    5.22
  TT011      10    127 -120.1  21.350      NA  35.757  24.975   13.22
  TT011      11    136 -120.1  24.068  35.477  35.509  24.009    5.64
  TT011      11    137 -121.6  18.023      NA  35.439  25.604   10.17
  TT011      11    139 -120.2  21.671      NA  35.689  24.835   12.50
  TT011      11    143 -120.7  20.496  35.665  35.649  25.126    7.44
  TT011      11    145 -118.3  22.639      NA  35.639  24.524    6.93
  TT011      13    162  -59.8  26.514      NA  35.255  23.067    5.10
  TT011      13    162  -70.7  26.514      NA  35.266  23.075    5.35
  TT011      13    162  -79.8  26.488      NA  35.273  23.088    5.02
  TT011      13    162  -89.9  26.451      NA  35.272  23.099    5.25
  TT011      14    166  -89.5  27.299  35.967  35.772  23.205    1.24
  TT011      14    166  -99.4  27.283  36.123  36.091  23.451    0.61
  TT011      14    166   -110  26.711  36.260  36.251  23.755    0.62
  TT011      15    167 -120.3  24.226  36.429  36.373  24.616    0.96