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

Citations and DOIs

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, doi:10.1785/0220120032.

To cite the source of this Earth model:

  • 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.

To reference the use of this Earth model hosted by EMC:

To cite IRIS Earth Model Collaboration (EMC) data product or reference use of its repository:

Credits

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

Timeline

2010-12-09
Online

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