Effective Atmospheric Angular Momentum Functions (AAM) File name : ESMGFZ_AAM_v1.0_03h_2026.asc File contents : effective angular momentum functions from atmospheric mass and motion terms File units : dimensionless earth rotation excitation functions Issue date : 2026-01-08 Version number : v1.0 References : Dobslaw, H., R. Dill, A. Groetzsch, A. Brzezinski, and M. Thomas (2010), Seasonal polar motion excitation from numerical models of atmosphere, ocean, and continental hydrosphere, J. Geophys. Res., doi:10.1029/2009JB007127 Contact : Henryk Dobslaw, dobslaw@gfz-potsdam.de Affiliation : Deutsches GeoForschungsZentrum GFZ Dep. 1: Geodesy and Remote Sensing Sec. 1.3: Earth System Modelling Telegrafenberg 14473 Potsdam, Germany Temporal domain : 01.01.2026, 00:00 UTC until 07.01.2026, 21:00 UTC Temporal resolution : 3h Number of data records : 56 Subtracted mean values : mean from 2003-01-01 to 2014-12-31 7.152098599129423e-17 1.847667664741510e-17 3.794620422326981e-20 -3.220254498203050e-08 8.226002041060833e-08 3.462197020095727e-09 Data Source : 3h ECMWF operational analysis wind and surface pressure Horizontal domain : global Horizontal resolution : 0.5 x 0.5 degree (regular grid) Correction : Atm. surface pressure tides are subtracted, inverted barometer correction over ocean applied Data assimilated : None Notes : These AAMs are part of a set of consistently processed Earth rotation excitation function (AAM, OAM, HAM). The ocean model MPIOM and the hydrological model LSDM were forced consistently with operational analysis data from the ECMWF. ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- YYYY MM DD HH MJD AAM mass term AAM motion term x-component y-component z-component x-component y-component z-component 2026 01 01 00 61041.000 1.173819520809094e-07 -6.497650730266783e-08 -6.073855849668453e-10 5.901782509936743e-08 7.736886622506949e-08 4.234391008854719e-09 2026 01 01 03 61041.125 1.092698309851976e-07 -8.528416323647567e-08 -5.997096290454875e-10 6.125272681231267e-08 9.372216231424716e-08 4.309684177613815e-09 2026 01 01 06 61041.250 1.025416696551218e-07 -9.660185147590010e-08 -6.093812240148682e-10 1.184825139076823e-07 8.060978194409999e-08 4.349974646920412e-09 2026 01 01 09 61041.375 9.820698990797419e-08 -1.047711923604000e-07 -5.857702358790717e-10 1.403609050861907e-07 4.903660813468343e-08 4.321658035737932e-09 2026 01 01 12 61041.500 9.081683150931251e-08 -1.185709969651223e-07 -5.647865160597576e-10 1.753220172534355e-07 2.498463022010650e-08 4.296576911914363e-09 2026 01 01 15 61041.625 7.966193709531190e-08 -1.199501629946865e-07 -5.605256081005365e-10 1.537016444156404e-07 -2.222865288720629e-08 4.329026884128931e-09 2026 01 01 18 61041.750 7.367721705777662e-08 -1.272023394186801e-07 -5.302889452097300e-10 1.350677009933398e-07 -1.399936551720833e-08 4.388386280691426e-09 2026 01 01 21 61041.875 6.248839211770459e-08 -1.426076287066593e-07 -5.211326492761367e-10 1.203123568885421e-07 -1.890406626436267e-08 4.397532895450155e-09 2026 01 02 00 61042.000 5.614336418232494e-08 -1.515399412630245e-07 -5.031981378161360e-10 7.795334789187700e-08 -1.240808395307841e-08 4.382950859938097e-09 2026 01 02 03 61042.125 4.869721322707858e-08 -1.690835078048051e-07 -4.705838279514734e-10 7.730496238498897e-08 9.858097518143026e-11 4.367696497496426e-09 2026 01 02 06 61042.250 4.421184238970552e-08 -1.766631322284595e-07 -4.818841056260444e-10 1.024107963260034e-07 -1.868920348093013e-08 4.331911180435415e-09 2026 01 02 09 61042.375 4.113750410093775e-08 -1.829622117219167e-07 -4.791210991090247e-10 8.250560486286469e-08 -4.783542959009011e-08 4.292959936555811e-09 2026 01 02 12 61042.500 3.906353471186251e-08 -1.942801567870153e-07 -4.825650269156065e-10 1.035912181675921e-07 -7.100219550850589e-08 4.260790140243890e-09 2026 01 02 15 61042.625 3.546497675388843e-08 -1.918978837739579e-07 -5.005079935480321e-10 8.373476232573062e-08 -9.557025642493115e-08 4.198665735023133e-09 2026 01 02 18 61042.750 3.575021943278522e-08 -1.909605757383388e-07 -5.100839161525607e-10 8.396588521177930e-08 -6.857691162385971e-08 4.190619038577565e-09 2026 01 02 21 61042.875 3.564857573680816e-08 -1.957431359164902e-07 -5.238084530574493e-10 7.069626381471574e-08 -7.652730504967377e-08 4.107749753302537e-09 2026 01 03 00 61043.000 3.693908987353586e-08 -1.906215107839975e-07 -5.323148500241117e-10 3.800935374559701e-08 -9.349154696758098e-08 4.004515020522661e-09 2026 01 03 03 61043.125 3.360007982944087e-08 -1.933888093043313e-07 -5.271466711693590e-10 3.003324557471195e-08 -7.835567376128017e-08 3.996391769215273e-09 2026 01 03 06 61043.250 3.008413876120033e-08 -1.969185981674038e-07 -5.356403090123156e-10 7.504606569020106e-08 -5.488131225242410e-08 3.979201226510517e-09 2026 01 03 09 61043.375 2.547860640445960e-08 -1.998359485868671e-07 -5.210447890258325e-10 7.011758510266897e-08 -6.786018087797556e-08 3.907228325895939e-09 2026 01 03 12 61043.500 2.090695371757032e-08 -2.099809494204612e-07 -5.034210048183057e-10 9.160984686783563e-08 -8.634138070569681e-08 3.845788888953159e-09 2026 01 03 15 61043.625 9.900129964847446e-09 -2.109986997015121e-07 -5.020927579308229e-10 9.258976579494318e-08 -9.919157156424145e-08 3.807468937984271e-09 2026 01 03 18 61043.750 6.631551276722972e-09 -2.162029212111065e-07 -4.806440746299292e-10 1.219702821252794e-07 -7.470793438660273e-08 3.844355974745728e-09 2026 01 03 21 61043.875 -5.513057261010958e-10 -2.242387441918782e-07 -4.840753719288428e-10 1.281104253721343e-07 -6.844941582708162e-08 3.849997120799919e-09 2026 01 04 00 61044.000 -5.961092811290748e-09 -2.265903435827503e-07 -4.786103929629932e-10 8.389046172150781e-08 -6.575889707005489e-08 3.810447107482475e-09 2026 01 04 03 61044.125 -1.447488794428412e-08 -2.368767720617215e-07 -4.488453359157013e-10 8.846472290122228e-08 -6.057337450016639e-08 3.879273146349776e-09 2026 01 04 06 61044.250 -1.986466156880369e-08 -2.390160029039229e-07 -4.465674769843096e-10 1.253390506487677e-07 -8.129072382864279e-08 3.921926324820042e-09 2026 01 04 09 61044.375 -2.506073519063130e-08 -2.393656814722817e-07 -4.233267221226150e-10 8.676324324505483e-08 -9.768713277113149e-08 3.829939173003100e-09 2026 01 04 12 61044.500 -3.344229718205386e-08 -2.503396807914431e-07 -4.015773066985305e-10 8.361234312354575e-08 -1.001813504654550e-07 3.742222686812373e-09 2026 01 04 15 61044.625 -4.487835889165483e-08 -2.486998190718378e-07 -3.795545946950385e-10 7.098247757489679e-08 -1.200105674551265e-07 3.758932805063155e-09 2026 01 04 18 61044.750 -5.103447637166001e-08 -2.519121547167797e-07 -3.497753111690899e-10 6.179770900015931e-08 -1.044130093327610e-07 3.854679011571318e-09 2026 01 04 21 61044.875 -5.973341157728082e-08 -2.603920075676813e-07 -3.118371904137618e-10 6.310964568566426e-08 -7.977669015209001e-08 3.838317798808813e-09 2026 01 05 00 61045.000 -6.735333028019047e-08 -2.613851518661481e-07 -2.742744460557346e-10 4.159965853268914e-08 -5.644296492445047e-08 3.757681598144443e-09 2026 01 05 03 61045.125 -7.959155940612627e-08 -2.743170644482873e-07 -2.416734628401996e-10 4.795341440041691e-08 -5.720003171739475e-08 3.733896276503115e-09 2026 01 05 06 61045.250 -8.649156866957870e-08 -2.782070090098633e-07 -2.499210308115577e-10 8.010056432542355e-08 -7.859672900063302e-08 3.716371787995317e-09 2026 01 05 09 61045.375 -9.303596815140843e-08 -2.811155060737832e-07 -2.228977467015119e-10 7.026799246443200e-08 -8.462697494520546e-08 3.656807656721110e-09 2026 01 05 12 61045.500 -9.647185209920893e-08 -2.911321904947220e-07 -2.021132778226207e-10 9.418823362739650e-08 -9.960818209249539e-08 3.554429026519388e-09 2026 01 05 15 61045.625 -1.005470809298526e-07 -2.881342063328607e-07 -1.825271296036882e-10 9.203020339678327e-08 -1.399528108350300e-07 3.500442415730233e-09 2026 01 05 18 61045.750 -9.796294946522264e-08 -2.848304555623705e-07 -1.715765552617219e-10 8.025132199280922e-08 -1.405687060742894e-07 3.558309813289905e-09 2026 01 05 21 61045.875 -1.002367747767461e-07 -2.849424980309092e-07 -1.540196442273736e-10 7.077161820386954e-08 -1.346504201243392e-07 3.454741131193403e-09 2026 01 06 00 61046.000 -1.012796579698455e-07 -2.816717445325379e-07 -1.386127842344024e-10 3.387574846511100e-08 -1.205303005998278e-07 3.292569525341007e-09 2026 01 06 03 61046.125 -1.056777950817330e-07 -2.901755652543122e-07 -1.165631284652292e-10 5.926235712742197e-09 -9.282617032261841e-08 3.269958517549134e-09 2026 01 06 06 61046.250 -1.069964993816638e-07 -2.943382657940391e-07 -1.153801450055009e-10 7.874732522483171e-09 -5.002407172622046e-08 3.228283138812856e-09 2026 01 06 09 61046.375 -1.072818993635855e-07 -2.981187289718958e-07 -7.920057077499612e-11 1.764272557265505e-08 -2.665500314000106e-08 3.084393363189764e-09 2026 01 06 12 61046.500 -1.062216436215657e-07 -3.096794807665626e-07 -3.842768042472594e-11 7.383079951062062e-08 -1.247973088793379e-08 2.949365917809921e-09 2026 01 06 15 61046.625 -1.116871123835333e-07 -3.097698504112486e-07 -2.033097840486683e-11 5.864149996716095e-08 -2.141450302399657e-08 2.905026114678345e-09 2026 01 06 18 61046.750 -1.130949322168613e-07 -3.169126978778226e-07 -2.069436260860417e-12 6.091929733963210e-08 1.824258880227085e-08 2.945310289623402e-09 2026 01 06 21 61046.875 -1.183617984355369e-07 -3.239275768843148e-07 2.794581335965190e-11 1.065924882377097e-07 4.070310696910051e-09 2.806764127954307e-09 2026 01 07 00 61047.000 -1.181957835387003e-07 -3.175752150279370e-07 4.876969645727334e-11 1.070130550552341e-07 -8.018064039499952e-09 2.649475263200929e-09 2026 01 07 03 61047.125 -1.200884155149885e-07 -3.257780921060845e-07 6.181655515035606e-11 8.643969388420554e-08 -1.378334530805291e-08 2.703132234440191e-09 2026 01 07 06 61047.250 -1.229940932621878e-07 -3.266051429508275e-07 5.521224826826286e-11 1.038487443281142e-07 -7.701777851513957e-09 2.710942991859390e-09 2026 01 07 09 61047.375 -1.247330079002751e-07 -3.215819020889097e-07 8.670615723977827e-11 7.250294871257187e-08 -3.248948471167889e-08 2.636947932161838e-09 2026 01 07 12 61047.500 -1.229459111319284e-07 -3.234655275150364e-07 1.087030262096971e-10 5.641770264153068e-08 -3.458657277026687e-08 2.608457095585365e-09 2026 01 07 15 61047.625 -1.283199197285113e-07 -3.107404089169575e-07 1.034145052248995e-10 3.670856584563536e-08 -5.736989148948839e-08 2.591141610116560e-09 2026 01 07 18 61047.750 -1.296800363753529e-07 -3.018339374765655e-07 1.036425082916050e-10 2.743369415154212e-08 -4.925522842244850e-08 2.661564805212811e-09 2026 01 07 21 61047.875 -1.328557295248382e-07 -2.944248984249227e-07 1.182766026193961e-10 4.393852213416220e-08 -5.230089053480172e-08 2.621155401099188e-09