Journal Highlights

Diurnal atmosphere-ocean signals in Earth's rotation rate and a possible modulation through ENSO

Editors’ Highlight—This paper takes a mixed torque/angular momentum approach to study the effect of the S1 atmosphere/ocean tide on length-of-day. The authors show that the amplitude and phase of the S1 tide is modulated with the modulation being related to the ENSO phenomena. The results are surprising. For many years it was well accepted that torques were quantities less stable and precise than atmospheric angular momentum, which is a kind of integration; seeing the opposite is quite impressive as it indicates that the model precision has really made some progress. These results point the way to better modeling the effects of the S1 tide on length-of-day measurements and are an important contribution to the geodetic literature on this subject. 

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Early Results: Juno at Jupiter 

Early results from Juno's mission at Jupiter including approach to Jupiter and the first perijove pass (PJ1). Juno's scientific objectives include the study of Jupiter's interior, atmosphere and polar magnetosphere with the goal of understanding Jupiter's origin, formation and evolution. This collection of papers provides early results from Juno's measurements of the gravity and magnetic fields, deep atmospheric microwave sounding, infrared, visible and ultraviolet images/spectra and an array of fields and particles instruments as well as context for the early results with respect to current theory and models of Jupiter's formation and evolution. Topics include both Juno - Jupiter related theoretical models and data analysis as well as collaborative observations made from Earth based assets.