Data Services Products: EMC-PEM Parametric Earth Models

Summary

Parametric Earth Models (PEM) — Three models (Average, Continental & Oceanic) that were introduced by Dziewonski, Hales and Lapwood (1975) for which the radial variations of density and velocity are represented by piecewise continuous analytical functions of radius. All three models are identical below a depth of 420 km.

Description

Name PEM (PEM-A, PEM-C & PEM-O)
Title Parametric Earth Models (PEM)
Type 1-D Reference Earth Model
Sub Type full model
Year 1975
Short Description   Parametric Earth models (PEM) introduced by Dziewonski, Hales and Lapwood (1975) consists of three models for which the radial variations of density and velocity are represented by piecewise continuous analytical functions of radius. All three models are identical below a depth of 420 km.
  • Average Parametric Earth Model (PEM-A)
  • Continental Parametric Earth Model (PEM-C) reflects different properties of the continental upper mantle
  • Oceanic Parametric Earth Model (PEM-O) reflects different properties of the oceanic upper mantle
Authors:  
A. M. Dziewonski
Department of Earth and Planetary Sciences
Harvard University
Cambridge, Massachusetts, USA
A. L. Hales
Research School of Earth Sciences
Australian National University
Canberra, A.C.T., Australia
E. R. Lapwood
Department of Applied Mathematics and Theoretical Physics
University of Cambridge
Cambridge,, England
 
Base Model
Referenced by MC35 (references PEM-C)
Model Download  
PEM-A in comma separated value (CSV) file format (PEMA.csv ) with columns lef to right representing Radius (km), Depth (km), Density (g/cm3), Vp (km/s) and Vs (km/s)
 
PEM-A in IDV CSV file format (PEMA_IDV.csv ).
 
PEM-C in comma separated value (CSV) file format (PEMC.csv ) with columns lef to right representing Radius (km), Depth (km), Density (g/cm3), Vp (km/s) and Vs (km/s)
 
PEM-C in IDV CSV file format (PEMC_IDV.csv ).
 
PEM-O in comma separated value (CSV) file format (PEMO.csv ) with columns lef to right representing Radius (km), Depth (km), Density (g/cm3), Vp (km/s) and Vs (km/s)
 
PEM-O in IDV CSV file format (PEMO_IDV.csv).
 
Model Homepage
Depth Coverage 0 to 6371.0 km
Areal Coverage Point data
 

Reference Earth Model

PEM-C (continental) Reference Earth Model

Citation

  • Dziewonski, A.M., A.L. Hales, and E.R. Lapwood. 1975. “Parametrically simple earth models consistent with geophysical data Phys.” Earth Plan. Int. 10:12.
  • 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 application, Seismological Research Letters, 83(6), 846:854. doi: 10.1785/0220 120032

Credits

  • A.M. Dziewonski, A.L. Hales, and E.R. Lapwood

DOI

There is no DOI currently assigned for this product.

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