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It is better to use one of the other forms of presenting date and time data so that the data can be used in computations and for comparisons. Note, if the string begins with numbers but also includes letters, there may be problems using the field name for retrieval.\u003C\/p\u003E\n","parameter_max_value":null,"parameter_min_value":null,"parameter_nd_value":null,"parameter_official_name":"date_gmt","parameter_external_identifier":null,"parameter_short_description":"date_gmt","parameter_short_name":"date_gmt","parameter_units":null,"parameter_units_external_identifier":null,"order":null,"types":[{"type":"do not display as options","dataset_parameter_type_nid":"517670","type_rankable":"0","type_tid":"18"}]},{"dataset_parameter_nid":"517647","supplied_name":"time_gmt","supplied_units":"unitless","value_format":null,"description":"\u003Cp\u003ETime of cast (GMT). in the format\u00a0hhmmss\u003C\/p\u003E\n","no_data_value":"nd","conversion_necessary":"no","conversion_utility":null,"parameter_nid":"1005","parameter_description":"\u003Cp\u003Etime of day, reported in GMT time, 24 hour clock\u003C\/p\u003E\n","parameter_max_value":null,"parameter_min_value":null,"parameter_nd_value":null,"parameter_official_name":"time_gmt","parameter_external_identifier":null,"parameter_short_description":"time_gmt","parameter_short_name":"time_gmt","parameter_units":null,"parameter_units_external_identifier":null,"order":null,"types":[{"type":"do not display as options","dataset_parameter_type_nid":"517671","type_rankable":"0","type_tid":"18"}]},{"dataset_parameter_nid":"517648","supplied_name":"date_local","supplied_units":"unitless","value_format":null,"description":"\u003Cp\u003EDate of cast (local time zone). in the format\u00a0mmddyyyy\u003C\/p\u003E\n","no_data_value":"nd","conversion_necessary":"no","conversion_utility":null,"parameter_nid":"799","parameter_description":"\u003Cp\u003Elocal month, day and year, usually as a text string, e.g. feb10_1995. 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Units often reported as: meters, feet.\u003C\/p\u003E\n\u003Cp\u003E\nWhen used in a JGOFS\/GLOBEC dataset the depth is a best estimate; usually but not always calculated from pressure; calculated either from CTD pressure using Fofonoff and Millard (1982; UNESCO Tech Paper #44) algorithm adjusted for 1980 equation of state for seawater (EOS80) or simply equivalent to nominal depth as recorded during sampling if CTD pressure was unavailable.\u003C\/p\u003E\n","parameter_max_value":null,"parameter_min_value":null,"parameter_nd_value":"nd","parameter_official_name":"depth","parameter_external_identifier":"http:\/\/vocab.nerc.ac.uk\/collection\/P09\/current\/DEPH\/","parameter_short_description":"depth","parameter_short_name":"depth","parameter_units":"various","parameter_units_external_identifier":null,"order":null,"types":[{"type":"Primary depth variable","dataset_parameter_type_nid":"785127","type_rankable":"0","type_tid":"22"}]},{"dataset_parameter_nid":"528417","supplied_name":"amb_bot","supplied_units":"integer","value_format":null,"description":"\u003Cp\u003EAmber bottle identification number.\u003C\/p\u003E\n","no_data_value":"nd","conversion_necessary":"no","conversion_utility":null,"parameter_nid":"757","parameter_description":"\u003Cp\u003Ewater bottle number, generally assigned to a position on a CTD rosette, identifies all samples drawn from a given bottle\u003C\/p\u003E\n","parameter_max_value":null,"parameter_min_value":null,"parameter_nd_value":null,"parameter_official_name":"bottle","parameter_external_identifier":null,"parameter_short_description":"bottle","parameter_short_name":"bottle","parameter_units":null,"parameter_units_external_identifier":null,"order":null,"types":[{"type":"do not display as options","dataset_parameter_type_nid":"528427","type_rankable":"0","type_tid":"18"}]},{"dataset_parameter_nid":"528418","supplied_name":"niskin_sampled","supplied_units":"integer","value_format":null,"description":"\u003Cp\u003ENiskin bottle number from which HPLC sample was taken.\u003C\/p\u003E\n","no_data_value":"nd","conversion_necessary":"no","conversion_utility":null,"parameter_nid":"757","parameter_description":"\u003Cp\u003Ewater bottle number, generally assigned to a position on a CTD rosette, identifies all samples drawn from a given bottle\u003C\/p\u003E\n","parameter_max_value":null,"parameter_min_value":null,"parameter_nd_value":null,"parameter_official_name":"bottle","parameter_external_identifier":null,"parameter_short_description":"bottle","parameter_short_name":"bottle","parameter_units":null,"parameter_units_external_identifier":null,"order":null,"types":[{"type":"do not display as options","dataset_parameter_type_nid":"528428","type_rankable":"0","type_tid":"18"}]},{"dataset_parameter_nid":"528419","supplied_name":"niskins_fired","supplied_units":"range of integers","value_format":null,"description":"\u003Cp\u003ENiskin bottle numbers fired at depth; HPLC sample was taken from one Niskin bottle.\u003C\/p\u003E\n","no_data_value":"nd","conversion_necessary":"no","conversion_utility":null,"parameter_nid":"1108","parameter_description":"\u003Cp\u003Erosette bottle numbers; composite sample drawn from two or more bottles\u003C\/p\u003E\n","parameter_max_value":null,"parameter_min_value":null,"parameter_nd_value":"nd","parameter_official_name":"bots","parameter_external_identifier":null,"parameter_short_description":"bottles","parameter_short_name":"bots","parameter_units":"dimensionless","parameter_units_external_identifier":null,"order":null,"types":[{"type":"do not display as options","dataset_parameter_type_nid":"528429","type_rankable":"0","type_tid":"18"}]},{"dataset_parameter_nid":"528420","supplied_name":"filt_vol","supplied_units":"liters (L)","value_format":null,"description":"\u003Cp\u003EVolume of water filtered.\u003C\/p\u003E\n","no_data_value":"nd","conversion_necessary":"no","conversion_utility":null,"parameter_nid":"1412","parameter_description":"\u003Cp\u003Evolume of water filtered for fluorometric measurement\u003C\/p\u003E\n","parameter_max_value":null,"parameter_min_value":null,"parameter_nd_value":"nd","parameter_official_name":"fluor_vol_filt","parameter_external_identifier":"http:\/\/vocab.nerc.ac.uk\/collection\/P01\/current\/VOLFMCXX\/","parameter_short_description":"volume of water filtered","parameter_short_name":"fluor_vol_filt","parameter_units":"liters","parameter_units_external_identifier":null,"order":null,"types":[{"type":"do not display as options","dataset_parameter_type_nid":"528430","type_rankable":"0","type_tid":"18"}]},{"dataset_parameter_nid":"528421","supplied_name":"pigment","supplied_units":"text","value_format":null,"description":"\u003Cp\u003EName of the pigment measured:\u003Cbr \/\u003E\nchl_c3 = Chlorophyll c3;\u003Cbr \/\u003E\nchl_ide = Chlorophyllide a;\u003Cbr \/\u003E\nmg_dvp = Magnesium-2;4-divinyl phaeoporphyrin a5 monomethyl ester;\u003Cbr \/\u003E\nchl_c2 = Chlorophyll c2;\u003Cbr \/\u003E\nchl_c1 = Chlorophyll c1;\u003Cbr \/\u003E\nperidinin = Peridinin;\u003Cbr \/\u003E\nbut19 = 19-butanoyloxyfucoxanthin;\u003Cbr \/\u003E\nfucox = Fucoxanthin;\u003Cbr \/\u003E\nph_ide = Pheophorbide a;\u003Cbr \/\u003E\nneox = Neoxanthin;\u003Cbr \/\u003E\nprasinox = Prasinoxanthin;\u003Cbr \/\u003E\nviolax = Violaxanthin;\u003Cbr \/\u003E\nhex19 = 19\u0027-hexanoyloxyfucoxanthin;\u003Cbr \/\u003E\ndiadinox = Diadinoxanthin;\u003Cbr \/\u003E\ncis_fucox = cis-Fucoxanthin;\u003Cbr \/\u003E\nallox = Alloxanthin;\u003Cbr \/\u003E\ndiatox = Diatoxanthin;\u003Cbr \/\u003E\nmonad = Monadoxanthin;\u003Cbr \/\u003E\nzeax = Zeaxanthin;\u003Cbr \/\u003E\nlutein = lutein;\u003Cbr \/\u003E\ncrocox = Crocoxanthin;\u003Cbr \/\u003E\nchl_b = Chlorophyll b;\u003Cbr \/\u003E\ndv_chl_a = Divinyl Chlorophyll a;\u003Cbr \/\u003E\nchl_a = Chlorophyll a;\u003Cbr \/\u003E\np_phytin = Phaeophytin a;\u003Cbr \/\u003E\ncarotene_a = alpha Carotene;\u003Cbr \/\u003E\ncarotene_b = beta Carotene.\u003C\/p\u003E\n","no_data_value":"nd","conversion_necessary":"no","conversion_utility":null,"parameter_nid":"517664","parameter_description":"\u003Cp\u003EIncludes all pigments that cannot be explicitly classified as chlorophylls, phaeopigments or carotenoids.\u00a0 Generally, these are parameters where different pigments have been grouped together. Concentrations are expressed in terms of per unit volume or unit area of the water column.\u00a0 Does not include data expressed per unit mass of SPM. (Definition from SeaDataNet)\u003C\/p\u003E\n","parameter_max_value":null,"parameter_min_value":null,"parameter_nd_value":"nd","parameter_official_name":"pigment_concentration","parameter_external_identifier":"http:\/\/vocab.nerc.ac.uk\/collection\/P02\/current\/OPWC\/","parameter_short_description":"pigment concentration","parameter_short_name":"pigment_conc","parameter_units":"per unit volume or unit area of the water column","parameter_units_external_identifier":null,"order":null,"types":[{"type":"list variable","dataset_parameter_type_nid":"528423","type_rankable":"0","type_tid":"17"},{"type":"do not display as options","dataset_parameter_type_nid":"528424","type_rankable":"0","type_tid":"18"}]},{"dataset_parameter_nid":"528422","supplied_name":"concentration","supplied_units":"nanograms per liter (ng\/L)","value_format":null,"description":"\u003Cp\u003EConcentration of the pigment as determined by HPLC.\u003C\/p\u003E\n","no_data_value":"nd","conversion_necessary":"no","conversion_utility":null,"parameter_nid":"517664","parameter_description":"\u003Cp\u003EIncludes all pigments that cannot be explicitly classified as chlorophylls, phaeopigments or carotenoids.\u00a0 Generally, these are parameters where different pigments have been grouped together. Concentrations are expressed in terms of per unit volume or unit area of the water column.\u00a0 Does not include data expressed per unit mass of SPM. (Definition from SeaDataNet)\u003C\/p\u003E\n","parameter_max_value":null,"parameter_min_value":null,"parameter_nd_value":"nd","parameter_official_name":"pigment_concentration","parameter_external_identifier":"http:\/\/vocab.nerc.ac.uk\/collection\/P02\/current\/OPWC\/","parameter_short_description":"pigment concentration","parameter_short_name":"pigment_conc","parameter_units":"per unit volume or unit area of the water column","parameter_units_external_identifier":null,"order":null,"types":[{"type":"count variable","dataset_parameter_type_nid":"528425","type_rankable":"0","type_tid":"21"}]}]