{"id":36106,"date":"2014-07-21T06:00:48","date_gmt":"2014-07-21T06:00:48","guid":{"rendered":"http:\/\/www.climatemonitor.it\/?p=36106"},"modified":"2014-07-21T06:49:43","modified_gmt":"2014-07-21T06:49:43","slug":"el-nino-2014-2015-sara-bambinello","status":"publish","type":"post","link":"https:\/\/www.climatemonitor.it\/?p=36106","title":{"rendered":"El Ni\u00f1o 2014-2015: sar\u00e0 un bambinello o un bimbetto?"},"content":{"rendered":"<p><span style=\"line-height: 1.5em;\">Tutto il mondo della meteorologia e del clima\u00a0sta <\/span><span style=\"line-height: 1.5em;\">seguendo<\/span><span style=\"line-height: 1.5em;\"> le dinamiche climatiche del Pacifico equatoriale e lo sviluppo di El Ni\u00f1o da mesi, praticamente da quando c&#8217;\u00e8 stato il primo impulso di inversione degli Alisei e la formazione della Kelvin Wave che ha trasportato un bel po&#8217; di acqua calda verso la costa orientale dell&#8217;oceano.<\/span><\/p>\n<p>Ma, come si legge nell&#8217;ultimo\u00a0<a href=\"http:\/\/bobtisdale.wordpress.com\/2014\/07\/14\/the-201415-el-nino-part-13-more-mixed-signals\/\" target=\"_blank\">post<\/a>\u00a0di Bob Tisdale, uno dei blogger pi\u00f9 attivi su questo argomento, i feedback atmosferici non hanno collaborato e non stanno collaborando. Anzi, nell&#8217;ultimo <a href=\"http:\/\/www.cpc.ncep.noaa.gov\/products\/analysis_monitoring\/lanina\/enso_evolution-status-fcsts-web.pdf\" target=\"_blank\">report della NOAA<\/a>, si legge chiaramente (immagine sotto) che nelle ultime settimane i venti nei bassi strati lungo l&#8217;equatore sono stati in anomalia positiva, debole, ma positiva. Ci\u00f2 significa che hanno continuato a soffiare da est verso ovest.<\/p>\n<p style=\"text-align: center;\"><a href=\"http:\/\/www.climatemonitor.it\/wp-content\/uploads\/2014\/07\/03-equatorial-pacific-trade-wind-anomalies.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter  wp-image-36110\" alt=\"03-equatorial-pacific-trade-wind-anomalies\" src=\"http:\/\/www.climatemonitor.it\/wp-content\/uploads\/2014\/07\/03-equatorial-pacific-trade-wind-anomalies.png\" width=\"620\" height=\"433\" srcset=\"https:\/\/www.climatemonitor.it\/wp-content\/uploads\/2014\/07\/03-equatorial-pacific-trade-wind-anomalies.png 885w, https:\/\/www.climatemonitor.it\/wp-content\/uploads\/2014\/07\/03-equatorial-pacific-trade-wind-anomalies-300x210.png 300w\" sizes=\"auto, (max-width: 620px) 100vw, 620px\" \/><\/a><\/p>\n<p>Il risultato \u00e8 quello di un logoramento di quello che sembrava essere un El Ni\u00f1o di robuste proporzioni, fino ad un evento che vedr\u00e0 comunque il picco tra l&#8217;autunno e la prima parte dell&#8217;inverno, ma probabilmente con intensit\u00e0 debole o moderata. La quantit\u00e0 di calore rilasciata verso l&#8217;atmosfera sar\u00e0 quindi inferiore al previsto e le possibilit\u00e0 che questo rilascio si traduca in una ripresa dell&#8217;aumento delle temperature globali si allontana.<\/p>\n<p>Non che questo avrebbe avuto molto senso in termini climatici di lungo periodo, ma qualcuno ci sperava comunque non poco. Del resto, se non erro, dalle parti del Pacifico persiste un regime di PDO negativa (Pacific Decadal Oscillation), fatto questo che normalmente non si associa con eventi di El Ni\u00f1o intensi, anzi, \u00e8 pi\u00f9 di frequente associabile con una prevalenza di eventi di segno opposto.<\/p>\n<p>Qui sotto, l&#8217;ultima previsione multimodel dell&#8217;IRI, da cui si vedono piuttosto bene sia il picco che la fase discendente dell&#8217;El Ni\u00f1o che sar\u00e0.<\/p>\n<p><a href=\"http:\/\/www.climatemonitor.it\/wp-content\/uploads\/2014\/07\/IRI-Mid-june.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-36111\" alt=\"IRI Mid-june\" src=\"http:\/\/www.climatemonitor.it\/wp-content\/uploads\/2014\/07\/IRI-Mid-june.jpg\" width=\"555\" height=\"561\" srcset=\"https:\/\/www.climatemonitor.it\/wp-content\/uploads\/2014\/07\/IRI-Mid-june.jpg 555w, https:\/\/www.climatemonitor.it\/wp-content\/uploads\/2014\/07\/IRI-Mid-june-297x300.jpg 297w, https:\/\/www.climatemonitor.it\/wp-content\/uploads\/2014\/07\/IRI-Mid-june-60x60.jpg 60w\" sizes=\"auto, (max-width: 555px) 100vw, 555px\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<div class=\"linkwithin_hook\" id=\"https:\/\/www.climatemonitor.it\/?p=36106\"><\/div><script>\n<!-- \/\/LinkWithinCodeStart\nvar linkwithin_site_id = 1804759;\nvar linkwithin_div_class = \"linkwithin_hook\";\n\/\/LinkWithinCodeEnd -->\n<\/script>\n<script src=\"http:\/\/www.linkwithin.com\/widget.js\"><\/script>\n<a href=\"http:\/\/www.linkwithin.com\/\"><img decoding=\"async\" src=\"http:\/\/www.linkwithin.com\/pixel.png\" alt=\"Related Posts Plugin for WordPress, Blogger...\" style=\"border: 0\" \/><\/a><script type=\"text\/javascript\" charset=\"utf-8\" src=\"http:\/\/w.sharethis.com\/widget\/?wp=6.9.7\"><\/script><a class=\"synved-social-button synved-social-button-share synved-social-size-48 synved-social-resolution-single synved-social-provider-facebook nolightbox\" data-provider=\"facebook\" 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