Lentini, G. and Maugeri, M. and Devoti, R. and Albertella, A. and Sabadini, R. (2006) A possible relationship between the Arctic Oscillation Index and atmosphere-triggered interannual long-wavelength gravitational variations. Il nuovo cimento C, 29 (5). pp. 529-538. ISSN 1826-9885
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Abstract
A host of geophysical processes contribute to temporal variations in the low-degree zonal harmonics of the Earth’s gravity field. The present paper focuses on atmosphere-based mass redistributions using global surface pressure data from the NOAA Climate Diagnostics Center for the period 1980-2002. We computed atmosphere-triggered temporal variations of the Earth’s low-degree zonal gravitational coefficients Jl (l = 2 : 4). Such atmosphere-triggered ΔJl(t) are compared with the Arctic Oscillation Index (AOI) and with the observed ΔJl(t) computed by the Italian Space Agency (ASI) so as to investigate a possible coupling. We show that there is a significant agreement between the AOI and atmosphere-triggered ΔJl(t), as well as a particularly interesting correlation between the winter ΔJl(t) series and the AOI active season series.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Harmonics of the gravity potential field; geopotential theory and determination ; Gravity and isostasy ; Ocean/Earth/atmosphere/hydrosphere/cryosphere interactions; mass balance |
| Subjects: | 500 Scienze naturali e Matematica > 550 Scienze della Terra > 551 Geologia, Idrologia, Meteorologia |
| Depositing User: | Marina Spanti |
| Date Deposited: | 19 Mar 2020 14:44 |
| Last Modified: | 19 Mar 2020 14:45 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/16112 |
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