Five eddy covariance tower sites in Alaska provide half-hourly CO2, CH4, and H2O flux measurements, along with meteorological parameters like air temperature, wind speed, and soil temperature. The data form a 300-km north-south transect across Alaska's North Slope, covering the period from 2015-01-01 to 2017-03-09. The dataset was produced by ORNL_CLOUD and is hosted on NASA Earthdata.
Use Cases
- Analyze diurnal and seasonal patterns of CO2 and CH4 fluxes from the half-hourly time series.
- Correlate methane (CH4) flux with soil temperature and soil water content measurements to understand emission drivers.
- Model latent and sensible heat fluxes using concurrent meteorological data like air temperature, wind speed, and radiation.
- Investigate the north-south gradient in carbon fluxes across the 300-km transect using data from the Barrow, Atqasuk, and Ivotuk sites.
- Validate remote sensing products or process-based models with ground-truth eddy covariance flux data for CO2 and water vapor (H2O).
Strengths
- Data covers a 300-km environmental gradient with five distinct tower sites.
- Measurements are reported at a high temporal resolution of half-hourly intervals.
- The time range spans over two years, from January 2015 to March 2017.
Limitations
- The dataset is temporally stale, with the last update in March 2017.
- The sample size in terms of number of data rows or years of coverage is not specified.
- Geographic coverage is limited to five specific sites on Alaska's North Slope.
Provenance
- Source
- ORNL_CLOUD, hosted on NASA Earthdata.
- Collection Method
- Data gathered via eddy covariance flux towers.
- Time Range
- 2015-01-01 to 2017-03-09
- Freshness
- Data collection ended on 2017-03-09; no update frequency is specified.
- Geography
- Five sites forming a transect on Alaska's North Slope: Barrow (three sites), Atqasuk (ATQ), and Ivotuk (IVO).