Historical MBT Ocean Temperature Profiles from ROMBACH

Mechanical bathythermograph (MBT) data collected by the vessel ROMBACH provides temperature-depth profiles for the upper ocean layers. The dataset covers coastal waters of Southeast Alaska, British Columbia, and the North Pacific Ocean from August 1952 to June 1957. Data was processed by the National Oceanographic Data Center (NODC) into the standard C128 format.

Use Cases

• Analyzing thermal structure of the upper ocean (up to ~285m) using paired temperature-depth values.
• Studying seasonal or interannual temperature variability in coastal waters from 1952 to 1957.
• Validating historical ocean models for the Southeast Alaska and British Columbia region using cruise-specific data.
• Investigating the vertical temperature gradient at uniform 5-meter depth intervals.

Strengths

• Data is processed to a documented standard format (NODC C128).
• Provides a multi-year time series covering approximately five years of observations.
• Includes precise geospatial and temporal context with cruise information, date, position, and time for each profile.

Limitations

• Key metadata such as row count, column names, and file size are unavailable from all sources.
• Instrument limitation restricts useful data to the upper ocean layers, with a maximum depth of approximately 285 meters.
• Conflicting 'last updated' dates exist between platforms (2026-03-06 on Data.gov vs. 1957-06-21 on NASA Earthdata).

Provenance

Source

NOAA National Centers for Environmental Information (NCEI).

Collection Method

Collected via mechanical bathythermograph (MBT) instrument and processed by NODC.

Time Range

1952-08-26 to 1957-06-21

Freshness

2026-03-06 00:16:33.459683

Geography

Coastal Waters of Southeast Alaska and British Columbia, North Pacific Ocean.