Figure 2 in Abbaszadeh et al. (2021) represents the irrigation signal captured by the produced downscaled 1-km soil moisture product. The article should have specified, and is noted here, that this figure was generated using Figs. 2 and 3 from Lawston et al. (2017) and the related discussion includes a summary of the findings therein. For more information regarding SMAP-based irrigation detection, we refer readers to Lawston et al. (2017).
References
Abbaszadeh, P. , and Coauthors, 2021: High-resolution SMAP satellite soil moisture product: Exploring the opportunities. Bull. Amer. Meteor. Soc., 102, 309–315, https://doi.org/10.1175/BAMS-D-21-0016.1.
Lawston, P. M., J. A. Santanello, and S. V. Kumar , 2017: Irrigation signals detected from SMAP soil moisture retrievals. Geophys. Res. Lett., 44, 11 860–11 867, https://doi.org/10.1002/2017GL075733.