Historic Secchi Depth Measurements for Light Climate Studies, 1931-1968

470 Secchi depth measurements collected to study the effects of the light climate on pelagic fish. The data were gathered in specific years: 1931, 1937, 1946-1950, and 1968. The dataset originates from the Government Digital Service via the eu_open_data platform.

Use Cases

• Modeling historical light penetration in water columns based on Secchi depth measurements.
• Analyzing the relationship between water clarity and pelagic fish school positioning.
• Establishing a baseline for long-term water quality and transparency studies.

Strengths

• Contains 470 discrete measurements, providing a specific historical sample.
• Covers a distinct multi-decade time range from 1931 to 1968.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Last update date is unknown; freshness unverified.

Provenance

Source

Government Digital Service

Collection Method

Secchi depth measurements, likely collected via standard marine survey methods.

Time Range

1931, 1937, 1946-1950, 1968

Freshness

Last updated date is unknown.

Geography

Geography is not specified in the provided description.