The understanding of length-of-day variations from satellite gravity and laser ranging measurements
文献类型：期刊论文
| 作者 | Jin, Shuanggen1,2 ; Zhang, L. J.1,3; Tapley, B. D.2
|
| 刊名 | GEOPHYSICAL JOURNAL INTERNATIONAL
 |
| 出版日期 | 2011-02-01 |
| 卷号 | 184期号:2页码:651-660 |
| 关键词 | Time series analysis Satellite geodesy Time variable gravity Earth rotation variations |
| 英文摘要 | P>The change in the rate of the Earth's rotation, length-of-day (LOD), is principally the result of movement and redistribution of mass in the Earth's atmosphere, oceans and hydrosphere. Numerous studies on the LOD excitations have been made from climatological/hydrological assimilation systems and models of the general circulation of the ocean. However, quantitative assessment and understanding of the contributions to the LOD remain unclear due mainly to the lack of direct global observations. In this paper, the total Earth's surface fluids mass excitations to the LOD at seasonal and intraseasonal timescales are investigated from the Jet Propulsion Laboratory Estimating Circulation and Climate of the Ocean (ECCO) model, the National Centers for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR) reanalysis and the European Center for Medium-Range Weather Forecasts (ECMWF) Re-analysis (ERA)-Interim, GRACE-derived surface fluids mass and the spherical harmonics coefficient C-20 from the satellite laser ranging (SLR) as well as combined GRACE+SLR solutions, respectively. Results show that the GRACE and the combined GRACE and SLR solutions better explain the geodetic residual LOD excitations at annual and semi-annual timescales. For less than 1 yr timescales, GRACE-derived mass is worse to explain the geodetic residuals, whereas SLR agrees better with the geodetic residuals. However, the combined GRACE and SLR results are much improved in explaining the geodetic residual excitations at intraseasonal scales. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Geochemistry & Geophysics |
| 研究领域[WOS] | Geochemistry & Geophysics |
| 关键词[WOS] | ATMOSPHERIC ANGULAR-MOMENTUM ; POLAR MOTION ; SEASONAL-VARIATIONS ; EARTHS ROTATION ; OCEAN TIDES ; FIELD ; MODEL ; FLUCTUATIONS ; VARIABILITY ; LAGEOS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000286225300009 |
| 公开日期 | 2014-10-27 |
| 源URL | [http://119.78.226.72//handle/331011/15334]  |
| 专题 | 上海天文台_行星科学重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 2.Univ Texas Austin, Ctr Space Res, Austin, TX 78759 USA 3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jin, Shuanggen,Zhang, L. J.,Tapley, B. D.. The understanding of length-of-day variations from satellite gravity and laser ranging measurements[J]. GEOPHYSICAL JOURNAL INTERNATIONAL,2011,184(2):651-660. |
| APA | Jin, Shuanggen,Zhang, L. J.,&Tapley, B. D..(2011).The understanding of length-of-day variations from satellite gravity and laser ranging measurements.GEOPHYSICAL JOURNAL INTERNATIONAL,184(2),651-660. |
| MLA | Jin, Shuanggen,et al."The understanding of length-of-day variations from satellite gravity and laser ranging measurements".GEOPHYSICAL JOURNAL INTERNATIONAL 184.2(2011):651-660. |
入库方式： OAI收割
来源：上海天文台
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