Data Services Products: EMC-SENAM_FWT2021 3-D shear-wave velocity lithospheric model of the southern part of eastern North American margin

Summary

SENAM_FWT2021 is a 3-D, high-resolution shear-wave lithospheric velocity model beneath the southern part of eastern North American margin, which is constructed with full-wave ambient noise tomography by integrating onshore and offshore seismic datasets.

Description

Name SENAM_FWT2021
Title 3-D shear-wave velocity model of the eastern North American lithosphere
Type 3-D Full-wave ambient noise tomography Earth model
Sub Type Shear-wave velocity model
Year 2021
Data Revision r0.0 (revision history)
 
Short Description   A high-resolution shear-wave lithospheric velocity model beneath the southern part of eastern North American margin, which is constructed with full-wave ambient noise tomography
 
Authors: Cong Li, Department of Geosciences, University of Massachusetts Amherst, 627 North Pleasant Street. Amherst, MA 01003, E-mail: conli@geo.umass.edu

Haiying Gao, Department of Geosciences, University of Massachusetts Amherst, 627 North Pleasant Street. Amherst, MA 01003, E-mail: haiyinggao@geo.umass.edu
 
Previous Model N/A
 
Reference Model CUB shear velocity model provided by Shapiro & Ritzwoller, 2002
 
Model Download SouthernENAM-FWT-2021-0.20deg.r0.0.nc (see metadata) in the Polar Stereographic Projection and in netCDF 3 Classic format.
Original Model Repository https://osf.io/ws2pn/
 
Depth Coverage 0-100 km
 
Area The southern part of eastern North America margin (latitude: 30.56°/39.5°; longitude: 277.5°/289.46°)
 
Data Set Description SENAM_FWT_2021_0.020.nc includes latitude, longitude, depth, and absolute S-wave velocity in eastern North America. The model was parameterized into a regular 0.020-degree horizontal grids in longitude and latitude directions. The vertical grid size increases with depth from one-third of the horizontal grid size for the top 15 km to ~2 km at 100 km depth.
 
 

SENAM_FWT2021
Figure. (a) Distribution of the broadband seismic stations used in full-wave ambient noise tomography in this study. The background color is the bathemetry/topography. The magenta line is the profile location shown in (b). The yellow and gray belts denote the gravity and magnetic anomalies, respectively. The red cones represent the Eocene volcanoes.
(b) Cross-sections of the seismic tomographic model. P-wave velocities for the top 12 km depths (upper panel) and S-wave velocities at the depths of 5-100 km for the continental part and at the depths of 5-60 km for the oceanic part (lower panel). The pink dashed line denotes the continental Moho inferred from teleseismic receiver functions by Li et al. (2020), and the brown dashed line denotes the oceanic Moho inferred from the 2-D active-source survey by Holbrook et al. (1994). The yellow and gray columns represent the gravity and magnetic anomalies, respectively. The thick gray line on the top of each profile corresponds to the topography/bathemetry. The green patches represent the water layer, which has a velocity of 1.5 km/s.

Citations and DOIs

To cite the original work behind this Earth model:

  • Li, C. & Gao, H. (2021). Modification of crust and mantle lithosphere beneath the southern part of the eastern North American passive margin. Geophysical Research Letters (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.senamfwt.1

References

  • Li, C., Gao, H., & Williams, M. L. (2020). Seismic characteristics of the eastern North American crust with Ps converted waves: Terrane accretion and modification of continental crust. Journal of Geophysical Research: Solid Earth, 125, 5. https://doi.org/10.1029/2019JB018727
  • Holbrook, W. S., Purdy, G. M., Sheridan, R. E., Glover, L., Talwani, M., Ewing, J., et al. (1994). Seismic structure of the U.S. mid-Atlantic continental margin. Journal of Geophysical Research Atmospheres, 991(B9), 17871-17891. https://doi.org/10.1029/94JB00729

Credits

  • r0.0 model provided by Cong Li.

Revision History

revision r0.0: uploaded July 28, 2021.

Timeline

2021-07-28
online

Categories

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