10080 jdbc:duckdb:/share/data/erddap-duckdb/duckdb/calcofi_ctd.db org.duckdb.DuckDBDriver true 1024MB 2 /share/data/erddap-duckdb/tmp ctd_thin_erddap " yes yes Point COARDS, CF-1.10, ACDD-1.3 CalCOFI https://calcofi.org (local DuckDB) CC-BY 4.0 CalCOFI https://calcofi.org CalCOFI CTD Profiles (thinned) Adaptively-thinned CTD profiles (long format, one row per cast/depth/measurement_type; canonical sensors only, ~10 m depth grid with inflection points preserved), joined to cast coordinates/time. Served via DuckDB views over partitioned Parquet (EDDTableFromDatabase). CF Standard Name Table v79 CalCOFI, CTD, ocean, temperature, salinity, oxygen, fluorescence, profiles, California Current, depth Long format: one row per cast x depth x measurement_type. measurement_value units depend on measurement_type. time/latitude/longitude are denormalized from ctd_cast via a DuckDB view over Parquet (EDDTableFromDatabase) — see https://calcofi.io/schema. https://calcofi.io/schema ; https://calcofi.org/data/oceanographic-data/ctd-cast-files/ CalCOFI CTD cast files (https://calcofi.org) calcofi@ucsd.edu CalCOFI https://calcofi.org CalCOFI 29.82682 37.84907 degrees_north -126.4843 -117.2734 degrees_east 0.968 3630 down m 1998-01-23T11:14:25Z 2026-04-23T22:01:12Z cruise_key, measurement_type ctd_cast_uuid ctd_cast_uuid String Identifier CTD Cast UUID FK to ctd_cast.ctd_cast_uuid time time double seconds since 1970-01-01T00:00:00Z Time time Time UTC timestamp parsed from date_time_utc string 885554065 1776981672 latitude latitude double degrees_north Location latitude Latitude GPS decimal latitude; downcast = start latitude, upcast = latitude at first bottle tripped (CalCOFI Lat_Dec) 29.82682 37.84907 longitude longitude double degrees_east Location longitude Longitude GPS decimal longitude; downcast = start longitude, upcast = longitude at first bottle tripped (CalCOFI Lon_Dec) -126.4843 -117.2734 depth depth double m down Location depth Depth depth in meters (retained depths only) 0.968 3630 cruise_key cruise_key String Identifier Cruise Key cruise identifier; hive partition key site_key site_key String Identifier Site Key CalCOFI Line and Station composite key in the form "LLL.L SSS.S" (renamed from Sta_ID) line line String Location Line CalCOFI Line in LLL.L format (e.g. 80.0) sta sta String Other Station CalCOFI Station in SSS.S format (e.g. 60.0) measurement_type measurement_type String Other Measurement Type measurement type key; canonical types only (FK to measurement_type.measurement_type where is_canonical) measurement_value measurement_value double Other Measurement Value Units VARY by measurement_type — this long-format column holds the numeric value for whichever sensor the row's measurement_type names. Canonical examples: temperature (degC), salinity (PSS-78), oxygen_ml_l (ml/L), sigma_theta (kg/m3), oxygen_saturation (%), oxygen_umol_kg (umol/kg), chlorophyll_a (ug/L), phaeopigment (ug/L). See the measurement_type variable and https://calcofi.io/schema. measurement_qual measurement_qual String Other Measurement Quality quality code (nullable) cast_dir cast_dir String Other Cast Direction single retained direction per physical cast: D (downcast, preferred) or U (upcast, fallback) retained_reason retained_reason String Other Retained Reason why this depth was kept: grid (on the ~10 m grid) or inflection (RDP-retained between grid nodes) ctd_thin_uuid ctd_thin_uuid String Identifier CTD Thin UUID PK: deterministic UUID v5 from (ctd_cast_uuid, depth_m, measurement_type)