This data are used to plot the figure 2 included in the paper. Surface electric fields Ex (V/km) for different resolution (dy*dz): 10 km * 1.5 km 5 km * 5 km 2.5 km * 2.5 km 0.524527652 0.470112363 0.463374498 0.532612206 0.474102292 0.4653569 0.541155141 0.478216912 0.467428003 0.550175703 0.482552524 0.469480042 0.559687992 0.486902823 0.471512151 0.569696804 0.491365959 0.473633866 0.580236516 0.49599588 0.47576883 0.59131741 0.500826164 0.477926336 0.60294518 0.505662969 0.480132854 0.615151282 0.510743815 0.482343244 0.627959325 0.515788759 0.484601688 0.6413846 0.521129409 0.486901711 0.65545482 0.52645005 0.489213842 0.67018498 0.532044881 0.491560376 0.685612785 0.537708019 0.493925166 0.701758245 0.543520117 0.496362138 0.718652836 0.549461145 0.498784161 0.73631685 0.555550855 0.501274485 0.754801771 0.561836091 0.503799732 0.774124503 0.56820098 0.506298073 0.794328238 0.574818178 0.508859615 0.815446599 0.581428388 0.51148133 0.837529114 0.588408974 0.514115057 0.860599493 0.59545688 0.516761984 0.884721093 0.602636111 0.519453044 0.909927564 0.609932061 0.52222345 0.936269471 0.617421079 0.524953737 0.963800001 0.625168425 0.527783305 0.992578755 0.633107854 0.530621047 1.022658918 0.641106175 0.533464998 1.05409925 0.64941663 0.536376415 1.086968649 0.657938078 0.539354243 1.121327853 0.666428456 0.542299995 1.157254299 0.675413354 0.545307583 1.194826222 0.684344663 0.548387855 1.234114633 0.693542236 0.551467819 1.275207014 0.703108362 0.554571275 1.318192961 0.712719068 0.55773951 1.363169408 0.722602461 0.560926769 1.410226776 0.732658181 0.564183179 1.459472005 0.742992182 0.567448454 1.511019748 0.753515883 0.570762508 1.564983536 0.764381059 0.574113681 1.621481931 0.775282153 0.57751929 1.680654889 0.786610609 0.580965428 1.74261532 0.798196918 0.584460119 1.807529614 0.809967064 0.587932983 1.87554126 0.821967818 0.591483855 1.946809522 0.834321525 0.59509509 2.021506759 0.846814866 0.598715907 2.099802828 0.859754042 0.602394897 2.181879048 0.872854528 0.606104886 2.267935801 0.886373012 0.609899419 2.35816903 0.900077727 0.613682193 2.452791701 0.914180108 0.6175424 2.552018191 0.928504156 0.6214773 2.656073061 0.943309479 0.625373551 2.765168839 0.95828136 0.629364515 2.879548909 0.973614945 0.633425428 2.999419646 0.989368949 0.637487436 3.125011555 1.005438311 0.641596135 3.256523616 1.021767779 0.645791486 3.39411454 1.038537503 0.650028006 3.537930924 1.055696658 0.654265786 3.688045336 1.073271369 0.658582466 3.844443112 1.091240918 0.662937706 4.006995258 1.109481455 0.667393548 4.175421275 1.128354323 0.671804709 4.349187075 1.147444175 0.676329116 4.527534262 1.167154212 0.680898843 4.709237171 1.187167245 0.685504446 4.892661895 1.207616274 0.690194173 5.075528255 1.228617011 0.69488776 5.254858519 1.250167309 0.699681117 5.426853671 1.27194032 0.70451537 5.586890773 1.294418393 0.709388049 5.729601722 1.317371919 0.714320713 5.849162066 1.340906242 0.719304902 5.939794234 1.364967423 0.724349639 5.996493539 1.389494253 0.729458642 6.01583147 1.414593929 0.734617905 5.996493556 1.440286392 0.739821309 5.939794244 1.466544881 0.745118788 5.849162091 1.493459546 0.750421038 5.729601731 1.52103813 0.755837458 5.586890764 1.549239144 0.761281532 5.426853667 1.578026458 0.766805234 5.254858505 1.607616405 0.77238167 5.075528241 1.637761287 0.778007898 4.892661884 1.668601956 0.783679048 4.70923716 1.700270343 0.789456258 4.527534273 1.732626103 0.79530356 4.349187083 1.765714737 0.801177712 4.175421271 1.799640097 0.807123015 4.006995254 1.834442029 0.813179651 3.84444314 1.86993209 0.819230478 3.688045328 1.906297902 0.825410253 3.53793092 1.943410577 0.831609609 3.394114539 1.981612408 0.837928477 3.256523625 2.020688968 0.844284466 3.125011557 2.060576654 0.850746597 2.999419638 2.101480777 0.857224294 2.879548893 2.143404792 0.863796707 2.765168819 2.186155781 0.870472348 2.656073046 2.230130739 0.877195687 2.55201819 2.275070559 0.884001902 2.452791692 2.321211319 0.890860878 2.358169036 2.368202946 0.897798835 2.267935785 2.416596801 0.904831767 2.181879039 2.465939766 0.911924482 2.099802802 2.516558828 0.919129039 2.021506773 2.568462489 0.926382637 1.946809519 2.621470991 0.933742684 1.87554124 2.675770489 0.941161837 1.807529604 2.731420654 0.94867299 1.742615338 2.78833867 0.956264949 1.680654891 2.846738029 0.963958324 1.621481942 2.906434713 0.971705791 1.56498356 2.967652793 0.979574279 1.51101972 3.030121675 0.987498982 1.459472014 3.094167937 0.995524582 1.410226764 3.15971198 1.003625516 1.363169393 3.226768928 1.011869771 1.318192958 3.295281465 1.020184041 1.275207011 3.365507902 1.028584202 1.234114644 3.437209532 1.037030851 1.19482621 3.510431192 1.045621381 1.157254317 3.585302913 1.054306891 1.121327848 3.661812322 1.063073412 1.086968647 3.739815929 1.071930178 1.054099226 3.819424407 1.080905624 1.022658923 3.900623856 1.089992889 0.992578733 3.983509415 1.099212432 0.963800008 4.067551348 1.108432081 0.936269451 4.153138419 1.117824353 0.909927537 4.240130379 1.127317379 0.884721085 4.328379221 1.136903909 0.860599478 4.417781258 1.146592689 0.837529105 4.508199481 1.156443489 0.81544658 4.599562148 1.166325685 0.794328219 4.691567142 1.176386496 0.774124505 4.783951816 1.186525614 0.754801764 4.876462714 1.196803717 0.736316831 4.968995912 1.207160755 0.718652831 5.060973691 1.217668188 0.701758233 5.152119959 1.228285872 0.685612777 5.241820906 1.239007661 0.670184983 5.329777823 1.249895132 0.655454808 5.41538869 1.260865069 0.641384591 5.49769116 1.271949355 0.627959297 5.57654873 1.283180901 0.615151244 5.650965022 1.294538427 0.602945164 5.72019684 1.306064729 0.591317412 5.783656149 1.317689571 0.580236503 5.84059155 1.329426085 0.569696788 5.890080539 1.341316089 0.559687988 5.931682554 1.353315054 0.550175702 5.964605476 1.365482791 0.541155148 5.988594699 1.377806183 0.532612197 6.003054179 1.390229499 0.524527654 6.008260134 1.402820258 6.0030546 1.41553474 5.988587845 1.42842085 5.964597526 1.441444486 5.931681768 1.45458369 5.890085318 1.467935223 5.84058897 1.48140963 5.783656746 1.495078158 5.720200035 1.508823866 5.650962158 1.52276964 5.57654432 1.53691694 5.497699532 1.551168756 5.415387578 1.565593937 5.329771601 1.580216492 5.241815953 1.59500671 5.152114715 1.609929189 5.060980687 1.625101495 4.968989703 1.640354881 4.876476151 1.655832221 4.783940549 1.671507464 4.691569144 1.687345824 4.599572065 1.703374743 4.508215226 1.719583174 4.417779771 1.735998966 4.32837742 1.75259315 4.240136991 1.769408755 4.153137783 1.786376437 4.067547898 1.80356195 3.983512553 1.820968848 3.900617056 1.83854185 3.819419972 1.856350425 3.739830624 1.874359356 3.661811784 1.892612714 3.58530913 1.911013854 3.510437359 1.929695702 3.437219499 1.948578033 3.365517578 1.967682968 3.295287869 1.986980453 3.226768058 2.00657407 3.159713037 2.026352952 3.09417034 2.046426858 3.030124834 2.0666453 2.967652219 2.087127848 2.906431557 2.107879805 2.846737316 2.128905688 2.788332948 2.150114854 2.731425769 2.171635491 2.675765909 2.193384644 2.621466109 2.215393704 2.568463531 2.237672058 2.516564621 2.260245473 2.465928832 2.283039145 2.416594691 2.306168372 2.368198394 2.329487743 2.321220422 2.353110935 2.275074327 2.377051978 2.230138246 2.401271245 2.186151249 2.425761028 2.143403164 2.450585976 2.101477595 2.475648833 2.060567402 2.501030908 2.020691083 2.526712743 1.981611964 2.552727708 1.943414429 2.579062944 1.906288585 2.605654009 1.869926437 2.632626593 1.834451131 2.659850546 1.799627323 2.687499936 1.765716191 2.71538438 1.732623741 2.743641923 1.70027745 2.772232604 1.668606699 2.801147819 1.637755945 2.830407676 1.607612188 2.860037213 1.578032833 2.889996127 1.549234609 2.920329757 1.521049485 2.950963538 1.493469943 2.982045561 1.46655367 3.013438191 1.440279552 3.045196592 1.414594779 3.077325032 1.389497497 3.109843111 1.364960435 3.142743748 1.340897795 3.176003945 1.317371547 3.209636747 1.294422639 3.243669461 1.271936357 3.278083187 1.250179352 3.312908073 1.228614669 3.348084425 1.207611239 3.38367795 1.187176421 3.41967109 1.167148192 3.456077041 1.147450919 3.492819386 1.128350169 3.530010804 1.10948176 3.567545904 1.09123655 3.60559284 1.073265734 3.643900898 1.055691713 3.682714491 1.03853592 3.721885236 1.021772164 3.761428827 1.005441032 3.801344069 0.989370997 3.841679574 0.973611383 3.882438504 0.958276482 3.923554747 0.943314076 3.965098805 0.928511844 4.006903077 0.914187629 4.049124555 0.900064503 4.091724494 0.886378415 4.134636043 0.872853966 4.177924899 0.859761187 4.221527816 0.846809281 4.265494937 0.834328986 4.309687316 0.82197289 4.354213499 0.80996684 4.399011636 0.798189056 4.444080105 0.786612094 4.489357368 0.775285307 4.534875769 0.764388526 4.580572341 0.753510768 4.626415948 0.742987392 4.672419899 0.732649137 4.718567271 0.72260089 4.76473962 0.712714536 4.811033126 0.703124129 4.857281363 0.6935332 4.903478446 0.684349304 4.949672576 0.675405554 4.995652439 0.666425901 5.041486991 0.657927518 5.087126734 0.649417114 5.132491862 0.641119311 5.177541304 0.63309914 5.222126693 0.625166321 5.26630178 0.617418756 5.309934908 0.609936677 5.352968095 0.602619343 5.395291873 0.595443157 5.436892184 0.588408725 5.477662698 0.581424639 5.517465053 0.574814593 5.556299957 0.56819438 5.594018049 0.561825656 5.630554337 0.55554554 5.665818563 0.549453939 5.699710004 0.543516919 5.732131312 0.537699506 5.762996162 0.532045001 5.792201359 0.52645326 5.819706063 0.521130658 5.84535175 0.515787759 5.869076062 0.510742883 5.890862091 0.505664002 5.91052025 0.500822091 5.928043206 0.496005243 5.943412343 0.491359614 5.95651123 0.486903176 5.967272819 0.482552166 5.975681173 0.478211445 5.981737209 0.474101185 5.98536174 0.470122644 5.986729749 5.985358358 5.98173981 5.975680465 5.967268489 5.956512067 5.943410536 5.928043056 5.910521528 5.890863178 5.86907648 5.845354693 5.819704255 5.792201952 5.762995968 5.732133706 5.699713064 5.665822019 5.630556123 5.594018277 5.556302474 5.517466326 5.477662612 5.43688903 5.395291215 5.352969711 5.309933502 5.266303994 5.222124799 5.177541847 5.132490646 5.087127705 5.041488051 4.995651367 4.949669352 4.903475608 4.857282455 4.811034498 4.764738628 4.718567196 4.672419025 4.626416202 4.580570158 4.53487596 4.489353704 4.444080961 4.399012243 4.354213705 4.309685884 4.265497596 4.221529111 4.177923619 4.134636279 4.091725603 4.049124203 4.006903726 3.965101347 3.923555688 3.882434731 3.841682021 3.801343158 3.761429287 3.721884905 3.682714654 3.643901761 3.605591704 3.567547986 3.530007128 3.492818623 3.456076424 3.419671847 3.38367644 3.348084741 3.312907437 3.278083068 3.243671914 3.20963766 3.176004439 3.142743583 3.109845992 3.077326406 3.045195214 3.013441292 2.982045397 2.950961414 2.920330586 2.889995996 2.860038065 2.830405916 2.801144875 2.772235958 2.743637721 2.715382711 2.687497962 2.659850576 2.63262468 2.605654471 2.579063559 2.552726917 2.526710604 2.501030762 2.475646184 2.450587133 2.425761743 2.401270618 2.377054082 2.353108683 2.329488027 2.306167254 2.283038843 2.26024543 2.237672237 2.215392916 2.193387353 2.171631388 2.150114717 2.128901866 2.10787823 2.087127839 2.066647423 2.046426585 2.026353442 2.006573333 1.986979381 1.967682577 1.94857658 1.929695906 1.911011143 1.892612115 1.874359358 1.856352445 1.838540315 1.820968118 1.803559651 1.78637495 1.76940911 1.752593266 1.735998297 1.719582018 1.703373367 1.687346804 1.671507672 1.655832163 1.640353971 1.625099447 1.609931204 1.59500468 1.580216351 1.565593813 1.551166556 1.536917909 1.52276798 1.508824079 1.495080221 1.481409024 1.467937369 1.454584692 1.441444447 1.428420639 1.415532367 1.402819698 1.390228815 1.37780535 1.365483383 1.353316441 1.341316927 1.329424785 1.31769024 1.30606302 1.294537425 1.283181074 1.271947242 1.260863047 1.249896428 1.239008273 1.22828813 1.217668394 1.207162482 1.196803357 1.186526385 1.176385788 1.166323591 1.156442322 1.146594786 1.136901862 1.1273173 1.11782637 1.108428996 1.099211125 1.089995003 1.08090661 1.071931912 1.063071538 1.054306578 1.04562232 1.0370328 1.028581688 1.020180465 1.011871281 1.003625643 0.995524528 0.987498414 0.979573955 0.9717061 0.963957415 0.956263764 0.948672091 0.941161192 0.933743534 0.926381777 0.91912947 0.911925624 0.904833836 0.897799343 0.890859544 0.883998409 0.87719666 0.87047228 0.863796973 0.857223714 0.850744832 0.844287694 0.837929916 0.831607482 0.825412634 0.819228696 0.813178688 0.807120779 0.801178426 0.795303719 0.789457921 0.783678347 0.778009883 0.772381323 0.766807836 0.761283297 0.755837371 0.750420533 0.745117258 0.739823732 0.734617885 0.729458131 0.724350507 0.719304783 0.714321595 0.709390087 0.704514044 0.699681427 0.694888748 0.690194679 0.685502799 0.680896115 0.676328012 0.671806333 0.667394673 0.662937643 0.658583498 0.654265517 0.650028003 0.645791312 0.641597008 0.637486113 0.633424952 0.629367116 0.625373188 0.621478813 0.617541137 0.613683361 0.609900032 0.606104957 0.602392045 0.598718245 0.595094754 0.591482678 0.587932284 0.584458863 0.580965117 0.577519922 0.574111273 0.57076463 0.56744992 0.564183072 0.560924814 0.557741351 0.554569635 0.55147126 0.548388084 0.545306707 0.542296746 0.539352054 0.53637639 0.533465837 0.530620978 0.527782254 0.524953805 0.522223645 0.519453614 0.516759584 0.514113843 0.511481968 0.508859691 0.50629277 0.503800989 0.501273498 0.498786889 0.496363247 0.493922718 0.491561242 0.489214466 0.486903512 0.484600915 0.482343113 0.480135443 0.477927583 0.475767916 0.47363626 0.471511473 0.469478613 0.467428006 0.465356406 0.463374744