BOREAS Soil Moisture Measurements from Tower Flux Sites

BOREAS HYD-01 data contains volumetric soil moisture measurements collected at tower flux sites in the Northern (NSA) and Southern (SSA) Study Areas. The NASA-led team used neutron probe and time-domain reflectometry (TDR) methods, both manual and automated. Measurements span 1994 to 1997, with frequency ranging from hourly to every other day across nine distinct forest and fen sites.

Use Cases

• Validating satellite-derived soil moisture estimates using ground-truth measurements from specific sites like NSA-OJP and SSA-OBS.
• Analyzing temporal soil moisture dynamics at hourly intervals from automated TDR sensors deployed in 1995-1997.
• Comparing soil moisture variation across different boreal forest stand types (e.g., Old Jack Pine (OJP), Young Jack Pine (YJP), Fen).
• Studying the relationship between soil water content and tower-measured carbon/water fluxes.
• Assessing methodological differences between neutron probe and TDR measurement techniques for soil moisture.

Strengths

• Provides high-temporal-resolution data, with automated measurements recorded as often as every hour from 1995-1997.
• Covers multiple key boreal ecosystem sites (e.g., NSA-OJP, NSA-Fen, SSA-YA) across a multi-year period (1994-1997).
• Employs multiple established measurement methods (neutron probe, manual TDR, automated TDR) for data collection.

Limitations

• Specific column names, row counts, and dataset size are not provided by any source, limiting detailed structural understanding.
• Conflicting 'last updated' dates exist between platforms (1997-06-26 on NASA Earthdata vs. 2026-03 13 on Data.gov), creating uncertainty about metadata maintenance.

Provenance

Source

National Aeronautics and Space Administration (NASA), BOREAS HYD-01 team.

Collection Method

Field measurements using neutron probe and time-domain reflectometry (TDR), both manual and automated.

Time Range

1994 to 1997

Freshness

2026-03-13 07:29:41.661981

Geography

BOREAS Northern (NSA) and Southern (SSA) Study Areas tower flux sites in Canada, including NSA-OJP, NSA-YJP, NSA-OBS, NSA-Fen, SSA-OJP, SSA-YJP, SSA-Fen, SSA-YA, and SSA-OBS.