Global Nitrogen Cycle Fluxes and Nitrous Oxide Mixing Ratios

Historical data from 1756 to 2004 quantifies changes in the global nitrogen cycle driven by human activity. Assembled by the ORNL DAAC, the dataset includes fertilizer production, manure production, crop nitrogen fixation estimates, and tropospheric N2O mixing ratios from ice core and atmospheric measurements. It serves as an interdisciplinary resource for studying the environmental impacts of industrialization and agricultural intensification.

Use Cases

• Analyzing trends in fertilizer production from 1920-2004 to assess agricultural intensification.
• Correlating historical manure production data (1860-2004) with land use and water quality studies.
• Using tropospheric N2O mixing ratios (1756-2004) as an independent index to validate global nitrogen cycle models.
• Estimating crop nitrogen fixation for benchmark years (1860, 1900, 1995) to study biological contributions to the N cycle.
• Investigating the link between fossil fuel NOx emissions, industrialization, and perturbations to atmospheric chemistry.

Strengths

• Provides a long-term temporal record spanning up to 248 years (1756-2004).
• Integrates multiple key flux types (fertilizer, manure, fixation, N2O) for a holistic view of the nitrogen cycle.
• Sourced from authoritative scientific measurements, including ice core and firn data for historical N2O levels.

Limitations

• Specific column names, row counts, and dataset size are not provided by any source.
• Conflicting last updated dates exist between sources (2004-12-31 vs. 2026-03-13), casting uncertainty on data currency.

Provenance

Source

ORNL DAAC (Oak Ridge National Laboratory Distributed Active Archive Center)

Collection Method

Assembled from various published scientific sources and measurements.

Time Range

1756 to 2004

Freshness

2026-03-13 01:52:17.770729

Geography

Global