Item talk:Q271420

{

 "USGS Publications Warehouse": {
   "@context": "https://schema.org",
   "@type": "CreativeWork",
   "additionalType": "Abstract or summary",
   "name": "The magnetic tides of Honolulu",
   "identifier": [
     {
       "@type": "PropertyValue",
       "propertyID": "USGS Publications Warehouse IndexID",
       "value": "70095678",
       "url": "https://pubs.usgs.gov/publication/70095678"
     },
     {
       "@type": "PropertyValue",
       "propertyID": "USGS Publications Warehouse Internal ID",
       "value": 70095678
     }
   ],
   "inLanguage": "en",
   "datePublished": "2013",
   "dateModified": "2014-03-10",
   "abstract": "We review the phenomenon of time-stationary, periodic quiet-time geomagnetic tides. These are generated by the ionospheric and oceanic dynamos, and, to a lesser-extent, by the quiet-time magnetosphere, and they are affected by currents induced in the Earth's electrically conducting interior. We examine historical time series of hourly magnetic-vector measurements made at the Honolulu observatory. We construct high-resolution, frequency-domain Lomb-periodogram and maximum-entropy power spectra that reveal a panorama of stationary harmonics across periods from 0.1 to 10000.0-d, including harmonics that result from amplitude and phase modulation. We identify solar-diurnal tides and their annual and solar-cycle sideband modulations, lunar semi-diurnal tides and their solar-diurnal sidebands, and tides due to precession of lunar eccentricity and nodes. We provide evidence that a method intended for separating the ionospheric and oceanic dynamo signals by midnight subsampling of observatory data time series is prone to frequency-domain aliasing. The tidal signals we summarize in this review can be used to test our fundamental understanding of the dynamics of the quiet-time ionosphere and magnetosphere, induction in the ocean and in the electrically conducting interior of the Earth, and they are useful for defining a quiet-time baseline against which magnetospheric-storm intensity is measured.",
   "publisher": {
     "@type": "Organization",
     "name": "American Geophysical Union"
   },
   "author": [
     {
       "@type": "Person",
       "name": "Love, Jeffrey J. jlove@usgs.gov",
       "givenName": "Jeffrey J.",
       "familyName": "Love",
       "email": "jlove@usgs.gov",
       "identifier": {
         "@type": "PropertyValue",
         "propertyID": "ORCID",
         "value": "0000-0002-3324-0348",
         "url": "https://orcid.org/0000-0002-3324-0348"
       },
       "affiliation": [
         {
           "@type": "Organization",
           "name": "Geologic Hazards Science Center",
           "url": "https://www.usgs.gov/centers/geologic-hazards-science-center"
         }
       ]
     },
     {
       "@type": "Person",
       "name": "Rigler, Erin Joshua",
       "givenName": "Erin Joshua",
       "familyName": "Rigler"
     }
   ],
   "funder": [
     {
       "@type": "Organization",
       "name": "Geologic Hazards Science Center",
       "url": "https://www.usgs.gov/centers/geologic-hazards-science-center"
     }
   ]
 }

}