Knowledge (XXG)

Earth tide

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minima (bulges and depressions) add together for the greatest tidal range at particular latitudes. At first- and third-quarter phases of the moon, lunar and solar tides are perpendicular, and the tidal range is at a minimum. The semi-diurnal tides go through one full cycle (a high and low tide) about once every 12 hours and one full cycle of maximum height (a spring and neap tide) about once every 14 days.
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In coastal areas, because the ocean tide is quite out of step with the Earth tide, at high ocean tide there is an excess of water above what would be the gravitational equilibrium level, and therefore the adjacent ground falls in response to the resulting differences in weight. At low tide there is a
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deformations. The vertical and east-west movement is maximum at 45° latitude and is zero on the equator and at the poles. The tesseral variation has one cycle per latitude, one bulge and one depression; the bulges are opposed (antipodal), in other words the western part of the northern hemisphere and
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when the Moon appears directly over 30° N (or 30° S). This pattern remains fixed with the red area directed toward (or directly away from) the Moon. Red indicates upward pull, blue downward. If, for example the Moon is directly over 90° W (or 90° E), the red areas are centred on the western northern
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The tide components with a period near twelve hours have a lunar amplitude (Earth bulge/depression distances) that are a little more than twice the height of the solar amplitudes, as tabulated below. At new and full moon, the Sun and the Moon are aligned, and the lunar and the solar tidal maxima and
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accumulated over many days, so that their amplitude and timing are quite different and vary over short distances of just a few hundred kilometres. The oscillation periods of the Earth as a whole are not near the astronomical periods, so its flexing is due to the forces of the moment.
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the eastern part of the southern hemisphere, for example. Similarly, the depressions are opposed, in this case the eastern part of the northern hemisphere and the western part of the southern hemisphere. Finally, fortnightly and semi-annual tides have
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and is always showing us one side. Body tides in Mercury make it trapped in the 3:2 spin-orbit resonance with the Sun. For the same reason, it is believed that many of the exoplanets are captured in higher spin-orbit resonances with their host stars.
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can exceed the displacements due to the Earth body tide. Sensitive instruments far inland often have to make similar corrections. Atmospheric loading and storm events may also be measurable, though the masses in movement are less weighty.
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equidistant from those points. At 30° latitude a strong peak occurs once per lunar day, giving a significant diurnal force at that latitude. Along the equator two equally sized peaks (and depressions) impart semi-diurnal force.
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deformations (constant along a circle of latitude), as the Moon or Sun gravitation is directed alternately away from the northern and southern hemispheres due to tilt. There is zero vertical displacement at 35°16' latitude.
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were designed while taking terrestrial tides into account for proper operation. Among the effects that need to be taken into account are circumference deformation for circular accelerators and also particle-beam energy.
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hemisphere, on upper right. Red up, blue down. If for example the Moon is directly over 90° W (90° E), the centre of the red area is 30° N, 90° W and 30° S, 90° E, and the centre of the bluish band follows the
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User manual for the Bernese GNSS Software, Version 5.2 (November 2015), Astronomical Institute of the University of Bern. Section 10.1.2. "Solid Earth Tides, Solid and Ocean Pole Tides, and Permanent Tides"
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Lunar tidal force: these images depict the Moon directly over 30° N (or 30° S) viewed from above the Northern Hemisphere, showing both sides of the planet. Red up, blue down.
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IERS Conventions (2010). GĂ©rard Petit and Brian Luzum (eds.). (IERS Technical Note ; 36) Frankfurt am Main: Verlag des Bundesamts fĂŒr Kartographie und GeodĂ€sie, 2010. 179 pp.,
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Sottili G., Martino S., Palladino D.M., Paciello A., Bozzano F. (2007), Effects of tidal stresses on volcanic activity at Mount Etna, Italy, Geophys. Res. Lett., 34, L01311,
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Makarov, V. V.; Berghea, C. & Efroimsky, M. (2012). "Dynamical Evolution and Spin–Orbit Resonances of Potentially Habitable Exoplanets: The Case of GJ 581d".
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and land masses of the surface, on scales that make the rigidity of rock irrelevant. Ocean tides are a consequence of tangent forces (see:
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Michael R. House, "Orbital forcing timescales: an introduction", Geological Society, London, Special Publications; 1995; v. 85; p. 1-18.
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Seismologists have determined that microseismic events are correlated to tidal variations in Central Asia (north of the Himalayas); see:
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measurements. Also, to make precise astronomical angular measurements requires accurate knowledge of the Earth's rate of rotation (
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The larger of the periodic gravitational forces is from the Moon but that of the Sun is also important. The images here show lunar
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The semidiurnal amplitude of terrestrial tides can reach about 55 cm (22 in) at the equator which is important in
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Noyelles, B.; Frouard, J.; Makarov, V. V. & Efroimsky, M. (2014). "Spin-orbit evolution of Mercury revisited".
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Williams, James G.; Boggs, Dale. H. (2015). "Tides on the Moon: Theory and determination of dissipation".
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The Earth tide encompasses the entire body of the Earth and is unhindered by the thin
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Displacement of the solid Earth's surface caused by the gravity of the Moon and Sun
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The semi-diurnal tide (one maximum every 12 or so hours) is primarily lunar (only
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Beyond the Moon, A Conversational, Common Sense Guide to Understanding the Tides
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Terrestrial tides also need to be taken in account in the case of some
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North-south displacements of sectorial movement. Red north, blue south.
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North-South displacements of tesseral movement. Red north, blue south.
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Accelerator on the move, but scientists compensate for tidal effects
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East-west displacements of sectorial movement. Red east, blue west.
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East-West displacements of tesseral movement. Red east, blue west.
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Vertical displacements of sectorial movement. Red up, blue down.
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deficit of water and the ground rises. Displacements caused by
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Vertical displacements of tesseral movement. Red up, blue down.
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Vertical displacements of zonal movement. Red up, blue down.
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use. The vertical displacement is frequently tabulated in
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http://sp.lyellcollection.org/cgi/content/abstract/85/1/1
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Global Earth Physics, A Handbook of Physical Constants
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For instance, at the 297:Theory of tides#Tidal constituents 25: 2292:Global Sea Level Observing System 871:very-long-baseline interferometry 399:Larger lunar elliptic semidiurnal 2575: 2564: 2555: 2554: 1750:Geochemical Ocean Sections Study 1666: 1655: 198: 186: 174: 160: 148: 136: 98: 89: 2480:Ocean thermal energy conversion 2203:Vine–Matthews–Morley hypothesis 1313:, Pergamon Press, Oxford, 1983. 921:Body tides also exist in other 856:tidal triggering of earthquakes 1318:Tides and the Pull of the Moon 958:Paul Melchior, "Earth Tides", 1: 917:In other astronomical objects 53:) is the displacement of the 1740:El Niño–Southern Oscillation 1710:Craik–Leibovich vortex force 1466:Luke's variational principle 1225:10.1016/j.icarus.2014.05.045 688: 683: 488: 483: 340: 335: 1093:"circumference deformation" 966:, pp. 275–303, March, 1974. 373:Principal solar semidiurnal 349:Principal lunar semidiurnal 2624: 1805:Ocean dynamical thermostat 1653: 1278:10.1088/0004-637X/761/2/83 975:John Wahr, "Earth Tides", 2550: 2340:Ocean acoustic tomography 2153:Mohorovičić discontinuity 1745:General circulation model 1381:Benjamin–Feir instability 1248:The Astrophysical Journal 867:Global Positioning System 659: 652: 459: 452: 311: 304: 57:'s surface caused by the 2470:Ocean surface topography 1845:Thermohaline circulation 1835:Subsurface ocean current 1775:Hydrothermal circulation 1608:Wave–current interaction 1386:Boussinesq approximation 2507:Sea surface temperature 2490:Outline of oceanography 1685:Atmospheric circulation 1623:shallow water equations 1613:Waves and shallow water 1506:Significant wave height 875:satellite laser ranging 2502:Sea surface microlayer 1867:Wind generated current 1302:McCully, James Greig, 981:AGU Reference Shelf, 1 696:Lunisolar fortnightly 425:Lunisolar semidiurnal 280: 2335:Deep scattering layer 2317:World Geodetic System 1825:Princeton Ocean Model 1705:Coriolis–Stokes force 1355:Physical oceanography 960:Surveys in Geophysics 910:particle accelerators 278: 2355:Underwater acoustics 1915:Perigean spring tide 1780:Langmuir circulation 1491:Rossby-gravity waves 1164:10.1002/2014je004755 1123:particle beam energy 1010:10.1029/2006GL028190 927:spin-orbit resonance 923:astronomical objects 128:Body tide components 2517:Science On a Sphere 2123:Convergent boundary 1795:Modular Ocean Model 1755:Geostrophic current 1471:Mild-slope equation 1270:2012ApJ...761...83M 1217:2014Icar..241...26N 1156:2015JGRE..120..689W 843:ocean tidal loading 836:Ocean tidal loading 2173:Seafloor spreading 2163:Outer trench swell 2128:Divergent boundary 2028:Continental margin 2013:Carbonate platform 1910:Lunitidal interval 1316:Wylie, Francis E, 1128:2011-07-20 at the 1074:2010-03-25 at the 983:, pp. 40–46, 1995. 290:tidal constituents 284:Tidal constituents 281: 258:vertical direction 81:Tide raising force 2590: 2589: 2582:Oceans portal 2542:World Ocean Atlas 2532:Underwater glider 2475:Ocean temperature 2138:Hydrothermal vent 2103:Submarine volcano 2038:Continental shelf 2018:Coastal geography 2008:Bathymetric chart 1890:Amphidromic point 1578:Wave nonlinearity 1436:Infragravity wave 908:, the very large 885:, in addition to 833: 832: 752:Solar semiannual 16:(Redirected from 2615: 2580: 2579: 2568: 2567: 2558: 2557: 2497:Pelagic sediment 2435:Marine pollution 2229:Deep ocean water 2098:Submarine canyon 2033:Continental rise 1925:Rule of twelfths 1840:Sverdrup balance 1770:Humboldt Current 1695:Boundary current 1670: 1659: 1476:Radiation stress 1446:Iribarren number 1421:Equatorial waves 1376:Ballantine scale 1371:Airy wave theory 1348: 1341: 1334: 1325: 1290: 1289: 1263: 1243: 1237: 1236: 1210: 1190: 1184: 1183: 1139: 1133: 1120: 1114: 1113: 1111: 1110: 1104: 1098:. 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1181: 1177: 1173: 1169: 1165: 1161: 1157: 1153: 1149: 1145: 1138: 1135: 1131: 1127: 1124: 1119: 1116: 1105:on 2011-03-24 1101: 1094: 1088: 1085: 1081: 1077: 1073: 1070: 1065: 1062: 1059: 1053: 1050: 1047: 1044: 1043:9783898889896 1040: 1034: 1031: 1027: 1023: 1022:Volcano watch 1018: 1015: 1011: 1007: 1001: 998: 995: 989: 986: 982: 978: 972: 969: 965: 961: 955: 952: 945: 941: 938: 937: 933: 931: 928: 924: 916: 914: 911: 907: 903: 899: 894: 892: 888: 884: 880: 879:length of day 876: 872: 868: 864: 859: 857: 849: 847: 844: 835: 825: 819: 817: 814: 809: 806: 804:Solar annual 803: 802: 795: 789: 786: 783: 781: 780: 773: 767: 765: 762: 757: 754: 751: 750: 743: 737: 734: 729: 726: 723: 722: 715: 709: 706: 701: 698: 695: 694: 691: 686: 682: 679: 674: 669: 662: 658: 655: 651: 644: 638: 636: 633: 628: 625: 622: 621: 614: 608: 605: 600: 597: 595: 594: 587: 581: 578: 573: 570: 568: 567: 563: 557: 554: 549: 546: 543: 542: 538: 535: 532: 527: 524: 522: 521:Lunar diurnal 519: 518: 514: 511: 508: 503: 500: 498: 497:Lunar diurnal 495: 494: 491: 486: 482: 479: 474: 469: 462: 458: 455: 451: 444: 438: 435: 430: 427: 424: 423: 419: 413: 410: 405: 402: 400: 397: 396: 392: 389: 387: 384: 379: 376: 374: 371: 370: 366: 363: 360: 355: 352: 350: 347: 346: 343: 338: 334: 331: 326: 321: 314: 310: 307: 303: 300: 298: 293: 291: 283: 277: 273: 271: 267: 263: 259: 254: 251: 246: 242: 235: 230: 226: 223: 219: 215: 201: 189: 177: 163: 151: 139: 127: 125: 122: 117: 101: 92: 80: 78: 76: 72: 68: 64: 60: 56: 52: 48: 44: 40: 36: 32: 19: 2537:Water column 2485:Oceanography 2460:Observations 2455:Explorations 2425:Marginal sea 2418: 2376:OSTM/Jason-2 2208:Volcanic arc 2183:Slab suction 1900:Head of tide 1894: 1790:Loop Current 1730:Ekman spiral 1516:Stokes drift 1426:Gravity wave 1401:Cnoidal wave 1317: 1310: 1303: 1297:Bibliography 1251: 1247: 1241: 1198: 1194: 1188: 1147: 1143: 1137: 1118: 1107:. Retrieved 1100:the original 1087: 1079: 1064: 1052: 1033: 1017: 1000: 988: 980: 976: 971: 963: 959: 954: 940:Love numbers 920: 895: 860: 853: 842: 839: 815: 807: 763: 755: 727: 699: 689: 684: 677: 672: 665: 660: 653: 634: 626: 598: 571: 547: 525: 520: 501: 496: 489: 484: 477: 472: 465: 460: 453: 428: 403: 398: 385: 377: 372: 353: 348: 341: 336: 329: 324: 317: 312: 306:Semi-diurnal 305: 294: 287: 266:astronomical 255: 233: 231: 227: 222:ocean basins 211: 121:great circle 113: 50: 46: 42: 39:crustal tide 38: 34: 30: 29: 2527:Thermocline 2244:Mesopelagic 2217:Ocean zones 2188:Slab window 2053:Hydrography 1993:Abyssal fan 1960:Tidal range 1950:Tidal power 1945:Tidal force 1830:Rip current 1765:Gulf Stream 1725:Ekman layer 1715:Downwelling 1690:Baroclinity 1677:Circulation 1573:Wave height 1563:Wave action 1546:megatsunami 1526:Stokes wave 1486:Rossby wave 1451:Kelvin wave 1431:Green's law 1311:Earth Tides 784:Lunar node 668:constituent 468:constituent 320:constituent 116:tidal force 55:solid earth 47:bodily tide 2603:Geophysics 2597:Categories 2465:Reanalysis 2364:Satellites 2345:Sofar bomb 2193:Subduction 2168:Ridge push 2063:Ocean bank 2043:Contourite 1970:Tide gauge 1955:Tidal race 1940:Tidal bore 1930:Slack tide 1895:Earth tide 1815:Ocean gyre 1635:Wind setup 1630:Wind fetch 1593:Wave setup 1588:Wave radar 1583:Wave power 1481:Rogue wave 1411:Dispersion 1109:2007-03-25 946:References 883:precession 787:18.613 yr 288:Principal 31:Earth tide 2327:Acoustics 2279:Sea level 2178:Slab pull 2115:tectonics 2023:Cold seep 1985:Landforms 1862:Whirlpool 1857:Upwelling 1640:Wind wave 1568:Wave base 1496:Sea state 1416:Edge wave 1406:Cross sea 1261:1208.0814 1254:(2): 83. 1208:1307.0136 1201:: 26–44. 1180:120669399 1172:2169-9097 891:pole tide 735:27.555 d 707:13.661 d 654:Long Term 606:23.869 h 579:23.804 h 555:24.066 h 533:25.819 h 509:23.934 h 436:11.967 h 411:12.658 h 361:12.421 h 295:See also 241:sectorial 51:land tide 43:body tide 2560:Category 2512:Seawater 2239:Littoral 2234:Deep sea 2093:Seamount 1975:Tideline 1920:Rip tide 1850:shutdown 1820:Overflow 1553:Undertow 1396:Clapotis 1233:53690707 1126:Archived 1072:Archived 934:See also 887:nutation 685:vertical 485:vertical 337:vertical 245:tesseral 2570:Commons 2440:Mooring 2390:Related 2381:Jason-3 2371:Jason-1 2254:Pelagic 2249:Oceanic 2224:Benthic 1541:Tsunami 1511:Soliton 1266:Bibcode 1213:Bibcode 1152:Bibcode 1132:affects 1012:, 2007. 904:or the 863:geodesy 850:Effects 661:Species 536:158.11 512:191.78 461:Species 454:Diurnal 390:179.05 364:384.83 313:Species 71:diurnal 61:of the 59:gravity 2259:Photic 2088:Seabed 1501:Seiche 1286:926755 1284:  1231:  1195:Icarus 1178:  1170:  1041:  873:, and 865:using 793:16.92 771:18.79 764:0.5 yr 741:21.33 713:40.36 690:horiz. 673:Period 564:10.36 561:70.88 539:22.05 515:32.01 490:horiz. 473:Period 442:48.72 420:10.31 417:73.69 393:25.05 367:53.84 342:horiz. 325:Period 2608:Tides 2450:Ocean 2419:Alvin 2269:Swash 2113:Plate 2058:Knoll 2048:Guyot 2003:Atoll 1882:Tides 1645:model 1531:Swell 1363:Waves 1288:. 83. 1282:S2CID 1256:arXiv 1229:S2CID 1203:arXiv 1176:S2CID 1103:(PDF) 1096:(PDF) 829:0.41 823:2.97 799:2.34 777:2.60 747:2.96 719:5.59 666:Tidal 648:0.25 642:1.65 618:0.21 612:2.72 591:0.43 585:3.44 466:Tidal 448:6.82 318:Tidal 250:zonal 214:crust 75:tides 2417:DSV 2402:Argo 2264:Surf 1720:Eddy 1168:ISSN 1039:ISBN 1026:USGS 902:CERN 893:). 816:1 yr 635:24 h 386:12 h 270:ÎŒGal 264:for 65:and 63:Moon 1274:doi 1252:761 1221:doi 1199:241 1160:doi 1148:120 1006:doi 67:Sun 49:or 2599:: 1280:. 1272:. 1264:. 1250:. 1227:. 1219:. 1211:. 1197:. 1174:. 1166:. 1158:. 1146:. 1078:, 1024:, 979:, 962:, 881:, 869:, 821:00 759:sa 640:00 610:00 583:00 299:. 45:, 41:, 37:, 1347:e 1340:t 1333:v 1276:: 1268:: 1258:: 1235:. 1223:: 1215:: 1205:: 1182:. 1162:: 1154:: 1112:. 1082:. 1028:. 1008:: 964:1 827:0 811:a 808:S 797:0 791:0 775:0 769:0 756:S 745:0 739:0 731:m 728:M 717:0 711:0 703:f 700:M 646:0 630:1 627:S 616:0 602:1 599:ψ 589:0 575:1 572:φ 559:0 551:1 548:P 529:1 526:O 505:1 502:K 446:0 440:0 432:2 429:K 415:0 407:2 404:N 381:2 378:S 357:2 354:M 237:2 234:S 20:)

Index

Solid-earth tide
solid earth
gravity
Moon
Sun
diurnal
tides


tidal force
great circle






crust
equilibrium tide
ocean basins
sectorial
tesseral
zonal
vertical direction
milliarcseconds
astronomical
ÎŒGal

tidal constituents
Theory of tides#Tidal constituents

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