Soil water content (saturation)
May 1, 2014
March 31, 2017
The 2015–2016 El Niño event ranks as one of the most severe on record in terms of the magnitude and extent of sea surface temperature (SST) anomalies generated in the tropical Pacific Ocean. This data was used to investigate changes in soil moisture to better understand how it is impacted by climate anomalies during an El Niño event.
Hourly data processed to monthly. Data collected from Cosmic Neutron Probes at variable depth averaging 28 cm that was interpolated to near-surface (0-10 cm). Site located at latitude -17.12 deg N, longitude 145.63 deg E. Data was downloaded from COSMOS data portal and is publicly available at http://cosmos.hwr.arizona.edu/. Data from this site is referenced as Australia (1) in Table 1 and Figure 4 of Solander et al.: The pantropical response of soil moisture to El Niño, Hydrol. Earth Syst. Sci., 24, 2303–2322, https://doi.org/10.5194/hess-24-2303-2020, 2020.
The stationary cosmic-ray soil moisture probe measures the neutrons that are generated by cosmic rays within air and soil and other materials, moderated by mainly hydrogen atoms located primarily in soil water, and emitted to the atmosphere where they mix instantaneously at a scale of hundreds of meters and whose density is inversely correlated with soil moisture. For more information about COSMOS and data collection methods, please see the publication: Zreda, M., Shuttleworth, W. J., Zeng, X., Zweck, C., Desilets, D., Franz, T., and Rosolem, R.: COSMOS: the COsmic-ray Soil Moisture Observing System, Hydrol. Earth Syst. Sci., 16, 4079–4099, https://doi.org/10.5194/hess-16-4079-2012, 2012.
University of Arizona
Solander, Kurt - Los Alamos National Laboratory ([email protected])
Zareda M (2020): Soil Water Content (m3 m-3) from Australia, May 2014 - March 2017. 1.0. NGEE Tropics Data Collection. (dataset). http://dx.doi.org/10.15486/ngt/1616726
Data Link: Download Dataset
Köhli, M., Schrön, M. , Zreda, M., Schmidt, U., Dietrich, P., and Zacharias, S., Footprint characteristics revised for field-scale soil moisture monitoring with cosmic-ray neutrons, Water Resour. Res., 51, 5772-5790, 2017, doi: 10.1002/2015WR017169
Andreasen, M., Jensen, K. H., Desilets, D., Zreda, M., Bogena, H. R., and Looms, M. C.: Cosmic-ray neutron transport at a forest field site: the sensitivity to various environmental conditions with focus on biomass and canopy interception, Hydrol. Earth Syst. Sci., 21, 1875–1894, https://doi.org/10.5194/hess-21-1875-2017, 2017.
Solander et al.: The pantropical response of soil moisture to El Niño, Hydrol. Earth Syst. Sci., 24, 2303–2322, https://doi.org/10.5194/hess-24-2303-2020, 2020.