Ptarmigan Dropsondes: Arctic Atmospheric Profiles from 1950-1961

Eleven years of dropsonde observations from 1950 to 1961 (excluding 1953) were collected by the U.S. Air Force along the Ptarmigan reconnaissance track. The data contains vertical profiles of geopotential height, temperature, and dew point temperature, primarily for the lower troposphere below 500mb. The observations were made mainly over the Beaufort Sea and the western Arctic Ocean.

Use Cases

• Reconstructing historical Arctic atmospheric conditions based on vertical profiles of temperature and dew point.
• Analyzing lower troposphere weather patterns over the Beaufort Sea based on geopotential height data.
• Validating or calibrating climate models using historical in-situ observations from the 1950s and 1960s.
• Studying data quality and positional accuracy in historical reconnaissance programs based on the described longitude offset.

Strengths

• Covers a specific 11-year time period between 1950 and 1961.
• Contains vertical profile data for three key atmospheric variables: geopotential height, temperature, and dew point.
• Provides in-situ observations from a specific geographic region (Beaufort Sea and western Arctic Ocean).

Limitations

• A known longitude offset of 10 degrees exists between dropsonde and aircraft positions, requiring correction.
• Column-level documentation is absent; field semantics must be inferred after download.
• Last updated 1961-12-31 23:59:59.999000; freshness should be verified.

Provenance

Source

U.S. Air Force, processed by SCIOPS.

Collection Method

Dropsonde observations made along the Ptarmigan reconnaissance flight track.

Time Range

1950 to 1961 (excluding 1953)

Freshness

1961-12-31 23:59:59.999000

Geography

Beaufort Sea and western Arctic Ocean.