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 |
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:
- IRIS DMC (2010), Data Services Products: PEM Parametric Earth Model, doi:10.17611/DP/9991828.
To cite IRIS Earth Model Collaboration (EMC) data product or reference use of its repository:
- IRIS DMC (2011), Data Services Products: EMC, A repository of Earth models, doi:10.17611/DP/EMC.1.
Credits
- A.M. Dziewonski, A.L. Hales, and E.R. Lapwood
Timeline
- 2010-12-09
- Online
