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.
Quicklinks
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. |
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| 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 |
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
