|Title||North American mantle S velocity tomography model|
|Type||3-D Tomography Earth Model|
|Sub Type||S velocity|
|Data Revision||r0.0 (revision history)|
|Short Description||-dimensional model NA07 (Bedle and van der Lee, 2009), an update of NA04 (Van der Lee and Frederiksen, 2005). An additional 1255 waveforms from five earthquakes recorded by USArray’s Transportable Array in the western United States were used to refine knowledge of the western United States (Bedle, 2008) and are included in this inversion. Lou (2013) provides additional detail on stations, events, and delay time measurements.|
|Authors:||Heather Bedle, School of Geosciences, University of Oklahoma, Norman, Oklahoma
Xiaoting Lou, Now at Chevron, Houston, TX (Previously at Northwestern University, Evanston, IL)
Suzan van der Lee, Department of Earth and Planetary Sciences, Northwestern University, Evanston, Illinois
|Model Download||SNA13.r0.0.nc (see metadata) in the Polar Stereographic Projection and in netCDF 3 Classic format.|
|Depth Coverage||Mantle (70 to 1200 km)|
|Area||North America (10°/85°, -170°/-55°)|
|Data Set Description||[Bedle et al. ] a new comprehensive North American upper mantle seismic-tomographic model, NA13, was inferred from a combination of several decades of seismic data from early North American seismic models and USArray data, including data from previous models NA07 and NA04. NA13 inverts a combination of regional waveform misfits, teleseismic S delay times, and constraints on Moho depths. The joint inversion model combines different data set types, and demonstrates enhanced resolution over regional models created with a single geophysical dataset. Resolution in the upper mantle is achieved on the scale of ~100km, although travel time delay studies suggest that anomalies in parts of the western United States are smaller.|
To cite the original work behind this Earth model:
- Bedle, Heather, Xiaoting Lou, and Suzan van der Lee (2021). High-resolution imaging of continental tectonics in the mantle beneath the United States, through the combination of USArray data sets. Geochemistry, Geophysics, Geosystems (accepted).
To cite IRIS DMC Data Products effort:
- Trabant, C., A. R. Hutko, M. Bahavar, R. Karstens, T. Ahern, and R. Aster (2012), Data Products at the IRIS DMC: Stepping Stones for Research and Other Applications, Seismological Research Letters, 83(5), 846–854, https://doi.org/10.1785/0220120032.
DOI for this EMC webpage: https://doi.org/10.17611/dp/emc.2021.na13.1
- Bedle, H., and S. van der Lee. 2009. “S velocity variations beneath North America.” J. Geophys. Res. 114:B07308, https://doi.org/10.1029/2008JB005949.
- Lou, X. (2013). Inferred and Predicted Seismic Velocities of the North American Mantle. Ph.D. thesis. Northwestern University, Evanston, IL.
- Van der Lee, S., and Andrew Frederiksen. 2005. Surface Wave tomography applied to the North American upper mantle, in AGU Monograph. Seismic Earth: Array Analysis of Broadband Seismograms, Eds: Levander A., and G. Nolet, 67-80. https://doi.org/10.1029/157GM05.
- r0.0 model provided by Suzan van der Lee and Heather Bedle.
revision r0.0: uploaded October 12, 2021.