Dissolved iron (Fe) concentration
- 170
- values
- 0
- flagged
- 170
- sampling events
- 2002–2004
- years
- 1
- dataset
- surface
- depth
- Jan · Feb · Mar · Apr · Jul · Nov
- seasons
No method row is registered for this measurement yet (metadata/measurement_method.csv).
CalCOFI holds 170 values of it from 170 sampling events in one dataset, 2002–2004, at the surface.R
The measurement
Measured in i
One row per series, one cell per year, darker with more values — the same strip the front
door draws per dataset and a species page draws per taxon. Each row is one dataset's own
measurement_type; the label is written once, in the title above.
i
One row per series, one cell per year, darker with more values — the same strip the front door draws per dataset and a species page draws per taxon. Each row is one dataset's own measurement_type; the label is written once, in the title above.
-
series
dissolved_iron· source columnDissolved Feno flag at this grain no P01 concept
How it is measured
Why it matters
The familiar scale i
Bars are each series' 5th–95th percentile, the line its minimum to maximum, the ring its median;
the marks are metadata/measurement_scale.csv's, each hovering to its own source.
i
Bars are each series' 5th–95th percentile, the line its minimum to maximum, the ring its median;
the marks are metadata/measurement_scale.csv's, each hovering to its own source.
The record’s own history i
i
The release builds no climatology for this measurement, so there is no normal to draw a departure from.
The record
Ways in i
Read from measurements.json of release
v2026.10.14, written at release by
calcofi4db::build_measurements_catalog() beside
taxa.json. The catalog's index is
/measurements/; the JSON-LD on this page is a
schema.org/DefinedTerm in the NERC P01 term set with a
PropertyValue per series.
Explorerdb-queryi
Read from measurements.json of release v2026.10.14, written at release by calcofi4db::build_measurements_catalog() beside taxa.json. The catalog's index is /measurements/; the JSON-LD on this page is a schema.org/DefinedTerm in the NERC P01 term set with a PropertyValue per series.
SELECT * FROM read_json('…/v2026.10.14/catalog.json')
-- objects[] WHERE table = 'obs_env'
-- AND partition_value = 'dissolved_iron'library(calcofi4r)
con <- cc_get_db() # the promoted release
tbl(con, "obs_env") |> filter(measurement_type %in% c("dissolved_iron"))import calcofi4py as cc
con = cc.cc_get_db()
con.sql("SELECT * FROM obs_env WHERE measurement_type IN ('dissolved_iron')").df()By depth i
Values per depth band at the release grain, one thin bar per series. The bands are the
record's own (0-10 … 2000+ m).
i
Values per depth band at the release grain, one thin bar per series. The bands are the record's own (0-10 … 2000+ m).
By month i
Values per calendar month, one row per series: CalCOFI's quarterly cruises show as peaks in
the months the ships sail.
i
Values per calendar month, one row per series: CalCOFI's quarterly cruises show as peaks in the months the ships sail.
Range & quality
details
- bounds
- The registry declares
at least 0 nmol/Lfordissolved_iron; a value outside it is dropped at the ingest (drop_out_of_bounds()). - observed
- Dissolved iron
dissolved_iron0.05 · median 0.39 · 8.2 nmol/L (5th–95th percentile 0.0945–3.438) - flags
- Dissolved iron
dissolved_ironcarries no quality code at the release grain; qual_ok keeps all 170. - baseline
- No climatology row is built for this measurement, so the Explorer draws values, not anomalies.
Cite
Cite the release; each dataset's own citation, licence and DOI are on its page — Dissolved iron. The Explorer's Share → Cite writes it for the view you make.