Add CTDPH for in situ ph reported on an unknown scale, though it is probably NBS

The following is from an email/phone conversation with Ryan Woosley
about this topic:

1. In situ pH sensors are almost always reported on the NBS scale.
> Most likely, if they didn’t know enough to specify the scale they
didn’t know enough to calibrate or convert it to total scale.
2. It’s possible, though rare to calibrate an in situ pH sensor to the
   seawater scale using a tris buffer
>  Yes, it can be done, but TRIS buffers are hard to make and not easy
to obtain so most don’t try.
3. You cannot calibrate an in situ pH electrode to report on the Total
   Scale, however you can correct the data using discrete bottle samples
   analyzed with the traditional m-cresol purple techniques.
>  It’s possible to do it, but most likely it would be done in post
processing, either with a TRIS buffers or spec pH measurements.

Some follow ups in addition to just confirming above (in the same oder):

1. It is reasonable to assume that an unknown CTD pH sensor data is on
   the NBS scale when we lack any other information than “it’s pH” or
   should we keep this separately in a "pH reported on an unknown
   scale”. Right now, we (CCHDO) are preparing to publish/format some
   CTD data that is on an unknown reporting scale and are preparing to
   have it as an “unknown scale” parameter.
> It’s reasonable to assume it’s NBS because anyone using the total
scale would know to say that.  If you have crossover data it would be
really easy to determine because NBS is ~0.13 units higher than total
scale.
2. I think it was stated that using TRIS would result in a one point
   calibration, I have some vague memories of using artificial seawater
   AMP buffers as an undergrad. Is there some reason this didn’t come up
   in our conversations yesterday (i.e. cannot use AMP for in situ pH
   electrodes)?
> Yes you could do a 2 point calibration with TRIS and AMP. It’s hard
enough to make TRIS no one takes the effort to make AMP as well.

Closes #57

Author: DocOtak

CHANGELOG

@@ -7,6 +7,7 @@ Parameter Changes
 * Add CTDCDOM [RU] for uv fluorometer data that has been calibrated/corrected to discrete samples normalized to the pure water Raman peak
 * Add FDOM [RU] for discrete samples normalized to the pure water Raman peak.
 * Removed the CTDCDOM [RU] to CTDCDOM [RFU] alias mapping
+* Add CTDPH for in situ ph reported on an unknown scale, though it is probably NBS
 
 API Changes
 -----------

src/cchdo/params/_whp_names.py

@@ -10154,6 +10154,35 @@
 emission_wavelength=None,
 nc_group=None,
 ),
+WHPNameDC(
+whp_name='CTDPH',
+dtype='decimal',
+in_erddap=False,
+whp_unit=None,
+nc_name='ctd_ph_unknown_scale',
+flag_w='woce_ctd',
+cf_name=None,
+numeric_min=None,
+numeric_max=None,
+numeric_precision=4,
+field_width=9,
+description='The measure of acidity of seawater reported on an unknown scale using an in situ electrode. SDN:P01::PHXXPR01',
+note=None,
+warning='The reporting scale is not known. Use caution when comparing this pH to any other pH, though it is probably reported on the NBS scale',
+error_name=None,
+cf_unit=None,
+reference_scale=None,
+whp_number=None,
+scope='sample',
+analytical_temperature_name=None,
+analytical_temperature_units=None,
+rank=40.9,
+radiation_wavelength=None,
+scattering_angle=None,
+excitation_wavelength=None,
+emission_wavelength=None,
+nc_group=None,
+),
 ]
 for name in names:
     whp_names[name.key] = name

src/cchdo/params/params.sqlite3

@@ -6015,6 +6015,7 @@ INSERT INTO "ex_params" VALUES('Al_TP_CONC_BOTTLE',NULL,'Particulate Aluminum in
 INSERT INTO "ex_params" VALUES('Ba_TP_CONC_BOTTLE',NULL,'Particulate Barium in a discrete bottle sample','For maximum data reusability, we decided to use GEOTRACES naming conventions',NULL,'sample','decimal','woce_discrete',0,917.0,0);
 INSERT INTO "ex_params" VALUES('Ca_TP_CONC_BOTTLE',NULL,'Particulate Calcium in a discrete bottle sample','For maximum data reusability, we decided to use GEOTRACES naming conventions',NULL,'sample','decimal','woce_discrete',0,917.0,0);
 INSERT INTO "ex_params" VALUES('LAB_DEN_TMP',NULL,'The temperature at which the density of a water sample was physically measured',NULL,NULL,'sample','decimal','woce_discrete',1,146.1,0);
+INSERT INTO "ex_params" VALUES('CTDPH',NULL,'The measure of acidity of seawater reported on an unknown scale using an in situ electrode. SDN:P01::PHXXPR01',NULL,'The reporting scale is not known. Use caution when comparing this pH to any other pH, though it is probably reported on the NBS scale','sample','decimal','woce_ctd',0,40.9,0);
 CREATE TABLE ex_units (
 	id INTEGER NOT NULL, 
 	whp_unit VARCHAR, 
@@ -6648,4 +6649,5 @@ INSERT INTO "whp_names" VALUES('Ca_TP_CONC_BOTTLE','PMOL/KG',NULL,'ca_tp_conc_bo
 INSERT INTO "whp_names" VALUES('LAB_DEN_TMP','DEG C','temperature_of_analysis_of_sea_water','density_temperature',NULL,NULL,NULL,NULL,NULL,9,3,NULL,NULL,NULL,NULL,NULL);
 INSERT INTO "whp_names" VALUES('CTDCDOM','RU','concentration_of_colored_dissolved_organic_matter_in_sea_water','ctd_cdom_ru',NULL,NULL,NULL,NULL,NULL,9,4,NULL,NULL,NULL,NULL,NULL);
 INSERT INTO "whp_names" VALUES('FDOM','RU','concentration_of_colored_dissolved_organic_matter_in_sea_water','fdom_ru',NULL,NULL,NULL,NULL,NULL,9,4,NULL,NULL,NULL,NULL,NULL);
+INSERT INTO "whp_names" VALUES('CTDPH',NULL,NULL,'ctd_ph_unknown_scale',NULL,NULL,NULL,NULL,NULL,9,4,NULL,NULL,NULL,NULL,NULL);
 COMMIT;