| Journal: | Revista brasileira de geofisica |
| Database: | PERIÓDICA |
| System number: | 000338763 |
| ISSN: | 0102-261X |
| Authors: | Rodrigues, Erica Patias1 |
| Institutions: | 1Universidade Federal do Parana, Departamento de Geomatica, Curitiba, Parana. Brasil |
| Year: | 2007 |
| Season: | Ene-Mar |
| Volumen: | 25 |
| Number: | 1 |
| Pages: | 45-50 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Analítico, descriptivo |
| English abstract | The objective of this paper is the estimation of vertical movements of the Earth’s crust using data of 45 GPS permanent stations network situated in Europe and North of Asia (Siberia). First, daily positions are calculated with the GAMIT processing GPS data software, developed in the Massachusetts Institute of Technology, for a period of approximately 500 days (November and December 2000, the entire year of 2001 and January and February of 2002). Each daily solution is stabilized in a reference frame with the implication of a similitude transformation in the GLOBK software, also developed in the MIT, with the Kalman filter. The crust deforms vertically due to different phenomena (earthquakes, landslides. . .). We focused in this project the effects caused by the atmospheric loading, it means the effects of the weight of the air’s column which surrounds the GPS stations. This loading is calculated for a 2.5◦× 2.5◦ resolution grid, with meteorological data provided of ECMWF (European Centre for Medium-range Weather Forecasts). The amplitude of these loadings is in the order of few millimetres up to 3 centimetres (Schuh et al., 2003). Finally we compare the vertical GPS permanent stations positions with the vertical movements of the Earth’s crust due to atmospheric loading. We observed for some sites in Siberia a predominant effect during winter in the vertical component. For example, for IRKT station (Irkust, Russia) the correlation value for the year of 2001 is 0.61 |
| Portuguese abstract | Este estudo tem por objetivo determinar o movimento vertical da crosta terrestre a partir de observacoes de uma rede de 45 estacoes GPS permanentes situadas na Europa e ao norte da Asia (Siberia). Em uma primeira etapa, as posicoes diarias sao calculadas com o software de tratamento de dados GPS GAMIT, desenvolvido no MIT (Massachusetts Institute of Technology), para um perıodo de aproximadamente 500 dias (de novembro de 2000 ate fevereiro de 2002). Cada solucao diaria e entao estabilizada num referencial atraves do emprego de uma transformacao espacial, etapa realizada atraves de filtro de Kalman com software GLOBK, desenvolvido tambem no MIT. O desvio padrao medio obtido para as posicoes verticais para o ano de 2001 e de sete mm. O solo se deforma verticalmente devido a acao de diversos fenomenos (terremotos, deslizamentos, entre outros) |
| Disciplines: | Geociencias |
| Keyword: | Ciencias de la atmósfera, Geofísica, Carga atmosférica, Sistema de Posicionamiento Global (GPS), Corteza terrestre, Movimientos verticales |
| Keyword: | Earth sciences, Atmospheric sciences, Geophysics, Atmospheric loading, Global Positioning System (GPS), Terrestrial crust, Vertical movements |
| Full text: | Texto completo (Ver PDF) |
