{"id":2095,"date":"2024-07-25T09:27:57","date_gmt":"2024-07-25T09:27:57","guid":{"rendered":"https:\/\/troposferica.com\/?p=2095"},"modified":"2026-01-16T11:48:15","modified_gmt":"2026-01-16T11:48:15","slug":"la-controversia-del-color-dels-mapes-meteorologics","status":"publish","type":"post","link":"https:\/\/troposferica.com\/ca\/la-controversia-del-color-dels-mapes-meteorologics\/","title":{"rendered":"LA CONTROV\u00c8RSIA DEL COLOR DELS MAPES METEOROL\u00d2GICS"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><br>\u00daltimament, els colors dels mapes de temperatures a la Pen\u00ednsula Ib\u00e8rica han generat <strong><mark style=\"background-color:rgba(0, 0, 0, 0);color:#2e9f31\" class=\"has-inline-color\">controv\u00e8rsia i cert alarmisme<\/mark><\/strong> en les xarxes socials. Per\u00f2\u2026 Per qu\u00e8?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les diferents variables meteorol\u00f2giques estan representades a trav\u00e9s d\u2019una escala de colors en els mapes meteorol\u00f2gics agrupant els valors de igual o similar magnitud per \u00e0rees. Aquesta agrupaci\u00f3 dels valors amb diferents colors \u00e9s molt necess\u00e0ria, ja que ens ajuda a fer que sigui m\u00e9s f\u00e0cil interpretar-los i extreure\u2019n tota la informaci\u00f3 possible.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Per\u00f2, certes vegades, si no s\u2019observen aquests mapes amb compte i mirant b\u00e9 la llegenda, els colors ens poden portar a interpretacions err\u00f2nies i, en algunes ocasions, les diferents gammes crom\u00e0tiques presents en els mapes poden generar confusi\u00f3 i falses alarmes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les p\u00e0gines web d\u2019informaci\u00f3 meteorol\u00f2gica en obert aix\u00ed com els portals dels diferents serveis meteorol\u00f2gics, elaboren els seus mapes a partir de diferents models meteorol\u00f2gics i, com podem veure en les seg\u00fcents imatges, no totes presenten la mateixa escala de colors.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"870\" height=\"498\" src=\"https:\/\/troposferica.com\/wp-content\/uploads\/2024\/07\/image-7.png\" alt=\"\" class=\"wp-image-2096\" srcset=\"https:\/\/troposferica.com\/wp-content\/uploads\/2024\/07\/image-7.png 870w, https:\/\/troposferica.com\/wp-content\/uploads\/2024\/07\/image-7-300x172.png 300w, https:\/\/troposferica.com\/wp-content\/uploads\/2024\/07\/image-7-768x440.png 768w\" sizes=\"auto, (max-width: 870px) 100vw, 870px\" \/><figcaption class=\"wp-element-caption\"><strong>Figura 1<\/strong>: <em>Esquerra:<\/em> Temperatures m\u00e0ximes previstes a Catalunya pel dia 15 de juliol de 2024 a les 15h. Font: Servei Meteorol\u00f2gic de Catalunya. Models atmosf\u00e8rics, WRF 1,5 km de temperatura a 2 m. <em>Dreta:<\/em> Temperatures m\u00e0ximes previstes pel dia 15 de juliol de 2024 a les 15h. Font: aemet.es. Models num\u00e8rics, HARMONIE-AROME de temperatura.<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"886\" height=\"458\" src=\"https:\/\/troposferica.com\/wp-content\/uploads\/2024\/07\/image-8.png\" alt=\"\" class=\"wp-image-2098\" srcset=\"https:\/\/troposferica.com\/wp-content\/uploads\/2024\/07\/image-8.png 886w, https:\/\/troposferica.com\/wp-content\/uploads\/2024\/07\/image-8-300x155.png 300w, https:\/\/troposferica.com\/wp-content\/uploads\/2024\/07\/image-8-768x397.png 768w\" sizes=\"auto, (max-width: 886px) 100vw, 886px\" \/><figcaption class=\"wp-element-caption\"><strong>Figura 2<\/strong>: <em>Esquerra:<\/em> Temperatures previstes pel dia 15 de juliol de 2024 a les 15h. Font: Meteociel.fr. AROME 1,3 km, Espanya, Nord-est de temperatura a 2 m. <em>Dreta:<\/em> Temperatures previstes pel dia 15 de juliol de 2024 ales 15h. Font: windy.com. AROME 2,5 km, de temperatura en superf\u00edcie.<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Despr\u00e9s de veure els exemples (figura 1 i figura 2), el primer que s\u2019aprecia \u00e9s que si no et fixes en la llegenda, hi ha alguns mapes que, aparentment, sembla que hi pugui fer molta m\u00e9s calor que en altres. No obstant aix\u00f2, les temperatures en tots els mapes s\u00f3n similars.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">En la gran majoria de casos, les coloracions ataronjades, vermelloses i liles s\u2019empren per a les temperatures elevades; i els colors blaus i blancs s\u2019utilitzen per a les temperatures fredes. <strong><mark style=\"background-color:rgba(0, 0, 0, 0);color:#2e9f31\" class=\"has-inline-color\">El que genera dubtes en la interpretaci\u00f3 dels mapes no s\u00f3n pas aquests colors, sin\u00f3 la gradaci\u00f3 dels mateixos que empren els diferents models i serveis meteorol\u00f2gics.<\/mark><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">En la figura 1, que hi apareixen els mapes del Meteo.cat i de l\u2019AEMET, hi ha colors verds i blaus en alguns punts dels Pirineus, i uns colors m\u00e9s taronges i groguencs cap a la costa i el litoral. En canvi, en la figura 2, en concret, en la imatge extreta de la web meteociel.fr la gran part del mapa \u00e9s de color vermell o, fins i tot, colors ja m\u00e9s marronosos o violetes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Aquest canvi en els mapes, tot i representar temperatures iguals o similars, s\u00f3n causats per la difer\u00e8ncia de color que s\u2019ha adjudicat a cadascuna de les temperatures. Per exemple, per al Meteocat o l\u2019AEMET el color groc est\u00e0 assignat al rang de temperatures que va del 20 al 22\u00baC o del 22 al 24\u00baC, respectivament i, en canvi, per a Meteociel el groc s\u2019ha assignat a unes temperatures de 10 a 12\u00baC.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0);color:#0087d6\" class=\"has-inline-color\">I com \u00e9s que hi ha tanta difer\u00e8ncia a la gradaci\u00f3 dels colors?<\/mark><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cal pensar que tant Meteocat com AEMET mostren els respectius models \u00fanicament per les \u00e0rees de Catalunya i d\u2019Espanya, respectivament, de tal manera que adapten els colors de les seves llegendes a les temperatures que s\u00f3n m\u00e9s habituals en aquestes zones. En canvi, hi ha altres p\u00e0gines en obert que mostren les temperatures per a Europa o, fins i tot, a escala mundial i, per tant, adapten les seves llegendes a la regi\u00f3 mostrada.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Per exemple, Meteociel (figura 2, esquerra), \u00e9s una p\u00e0gina que mostra mapes d\u2019Europa. Com ja se sap, hi ha regions al nord d\u2019Europa molt fredes que contrasten amb les temperatures for\u00e7a c\u00e0lides que patim al sud del continent. Per tal de poder representar aquestes temperatures tan fredes, ja que en la totalitat d\u2019Europa, predominen les temperatures baixes a les altes, aquesta p\u00e0gina ha adaptat la seva llegenda posant el color groc en temperatures 10\u00baC inferiors del que han fet els serveis nacionals de meteorologia de la pen\u00ednsula Ib\u00e8rica.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Un altre exemple que cal destacar \u00e9s el del Windy (figura 2, dreta). Aquesta p\u00e0gina mostra tot un seguit de models meteorol\u00f2gics a escala global, de tal manera que, a les nostres latituds, els colors majoritaris que representen les temperatures estiuenques s\u00f3n les groguenques o les taronges, ja que hi ha regions molt m\u00e9s c\u00e0lides que la nostra.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><mark style=\"background-color:rgba(0, 0, 0, 0);color:#2e9f31\" class=\"has-inline-color\"><strong>M\u00e9s enll\u00e0 de l\u2019adaptaci\u00f3 dels colors segons la regi\u00f3 del mapa que s\u2019estigui mostrant o estudiant no hi ha cap altre motiu per a canviar la gradaci\u00f3 dels colors.<\/strong><\/mark><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Actualment, no existeix cap regulaci\u00f3 per part d\u2019organismes internacionals en els colors que s\u00f3n assignats a cada temperatura. Malgrat aix\u00f2, tots els serveis nacionals meteorol\u00f2gics dels diferents pa\u00efsos aix\u00ed com els mateixos models num\u00e8rics de predicci\u00f3 meteorol\u00f2gica, han acceptat l\u2019est\u00e0ndard b\u00e0sic que els colors c\u00e0lids representen les temperatures m\u00e9s elevades i els colors freds representen les temperatures m\u00e9s baixes. Aix\u00f2 no obstant, la temperatura amb la qual estan relacionats els colors centrals de la gamma crom\u00e0tica ja dep\u00e8n de cada servei nacional i de les temperatures mitjanes, m\u00e0ximes i m\u00ednimes de cada pa\u00eds.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"886\" height=\"498\" src=\"https:\/\/troposferica.com\/wp-content\/uploads\/2024\/07\/image-9.png\" alt=\"\" class=\"wp-image-2100\" srcset=\"https:\/\/troposferica.com\/wp-content\/uploads\/2024\/07\/image-9.png 886w, https:\/\/troposferica.com\/wp-content\/uploads\/2024\/07\/image-9-300x169.png 300w, https:\/\/troposferica.com\/wp-content\/uploads\/2024\/07\/image-9-768x432.png 768w\" sizes=\"auto, (max-width: 886px) 100vw, 886px\" \/><figcaption class=\"wp-element-caption\"><strong>Figura 3<\/strong>: a) Llegenda de temperatures del Met Office (servei meteorol\u00f2gic nacional Brit\u00e0nic) Font: <a href=\"http:\/\/www.metoffice.gov.uk\">metoffice.gov.uk<\/a>. b) Llegenda de temperatures del Deutscher Wetterdienst o DWD (servei meteorol\u00f2gic nacional Alemany) Font: <a href=\"dwd.de\">dwd.de<\/a>. c) Llegenda de temperatures del AEMET (servei meteorol\u00f2gic nacional espanyol). Font: <a href=\"http:\/\/www.aemet.es\">aemet.es<\/a><\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Com es pot apreciar en els exemples de la figura 3, les llegendes corresponents al Servei Nacional Brit\u00e0nic (Met Office) i al Servei Nacional Alemany (DWD) tenen una gradaci\u00f3 similar, situant el centre de l\u2019escala (els colors verdosos) entre els 0-2\u00baC i els 8-10\u00baC. En canvi, l\u2019escala del Servei Nacional Espanyol situa el centre de l\u2019escala entre els 14\u00baC i els 22\u00baC. Aquesta difer\u00e8ncia tan substancial entre les gradacions a les llegendes provoca els problemes de colors quan s\u2019observa en una regi\u00f3 diferent de la qual ha estat pensada aquesta escala.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L\u2019Organitzaci\u00f3 Meteorol\u00f2gica Mundial (WMO, <em>World Meteorological Organitzation<\/em>) no s\u2019ha pronunciat al respecte i permet que cada servei adapti els colors a les seves temperatures mitjanes. De fet, el DWD, utilitza els models num\u00e8rics de la WMO per a mostrar previsions a escala global en la seva web amb la llegenda de colors de la figura 3 b).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0);color:#0087d6\" class=\"has-inline-color\">S&#8217;hi pot fer alguna cosa al respecte?<\/mark><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Com que ara per ara no existeix una estandarditzaci\u00f3 sobre a quines temperatures s&#8217;han d&#8217;atribuir els colors del centre de l&#8217;escala crom\u00e0tica, cada servei nacional i cada p\u00e0gina web de mapes meteorol\u00f2gics pot establir l&#8217;escala com millor es puguin representar les temperatures mitjanes de la zona on actua.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">No obstant tot aix\u00f2, aquest fet que s&#8217;ha de tenir molt clar a l&#8217;hora d&#8217;estudiar un mapa o fins i tot mostrar-lo en les xarxes socials, ja que els colors vermells sempre han estat associats a fets d&#8217;alarma. De tal manera que un mapa completament vermell a Catalunya pot semblar que sigui temperatures desorbitadament altes, quan en realitat no ho s\u00f3n tant. Com per exemple en les figures 1 i 2, que corresponen tots els mapes al dia 15 de juliol a les 15 h. Aquell dia les m\u00e0ximes van ser de 29-30\u00baC a Barcelona o de 36-37\u00baC a Lleida, que s\u00f3n temperatures elevades, per\u00f2 s\u00f3n habituals en la can\u00edcula, no s\u00f3n pas desorbitades.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Per tal de no tenir aquests problemes, el que caldria seria poder<strong><mark style=\"background-color:rgba(0, 0, 0, 0);color:#2e9f31\" class=\"has-inline-color\"> regular o estandarditzar<\/mark><\/strong> quins colors estan relacionats amb cada temperatura. Aquesta estandarditzaci\u00f3 de colors, sempre deixant un cert marge per a l&#8217;adaptaci\u00f3, permetr\u00e0 que mapes de la mateixa regi\u00f3 per al mateix dia i per la mateixa hora tinguin una escala de colors semblants, per no induir a error o a alarmes innecess\u00e0ries.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u00daltimament, els colors dels mapes de temperatures a la Pen\u00ednsula Ib\u00e8rica han generat controv\u00e8rsia i cert alarmisme en les xarxes socials. Per\u00f2\u2026 Per qu\u00e8? Les diferents variables meteorol\u00f2giques estan representades a trav\u00e9s d\u2019una escala de colors en els mapes meteorol\u00f2gics agrupant els valors de igual o similar magnitud per \u00e0rees. Aquesta agrupaci\u00f3 dels valors amb [&#8230;]\n","protected":false},"author":35,"featured_media":2102,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[75],"tags":[217,70,215,64,72],"class_list":["post-2095","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-curiosidades-ca","tag-alarma-meteorologica","tag-app-ca","tag-contrversia","tag-meteorologia-ca","tag-prediccio"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>CONTROV\u00c8RSIA DEL COLOR DELS MAPES METEOROL\u00d2GICS<\/title>\n<meta name=\"description\" content=\"Els colors dels mapes de temperatures a la Pen\u00ednsula Ib\u00e8rica han generat controv\u00e8rsia i cert alarmisme en les xarxes socials. 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