{"id":48138,"date":"2022-05-01T09:37:22","date_gmt":"2022-05-01T09:37:22","guid":{"rendered":"https:\/\/navegantesoceanicos.com\/la-observacion-de-la-presion-a-bordo\/"},"modified":"2026-07-02T15:49:07","modified_gmt":"2026-07-02T15:49:07","slug":"observando-a-pressao-a-bordo","status":"publish","type":"post","link":"https:\/\/navegantesoceanicos.com\/pt-pt\/observando-a-pressao-a-bordo\/","title":{"rendered":"Observando a press\u00e3o a bordo"},"content":{"rendered":"<p>[et_pb_section fb_built=&#8221;1&#8243; _builder_version=&#8221;4.18.1&#8243; _module_preset=&#8221;default&#8221; custom_padding=&#8221;1px|||||&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_row _builder_version=&#8221;4.18.1&#8243; _module_preset=&#8221;default&#8221; custom_padding=&#8221;1px|||||&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.18.1&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_text _builder_version=&#8221;4.27.7&#8243; _module_preset=&#8221;default&#8221; hover_enabled=&#8221;0&#8243; inline_fonts=&#8221;Amaranth,Abel&#8221; global_colors_info=&#8221;{}&#8221; sticky_enabled=&#8221;0&#8243;]<\/p>\n<h2><span style=\"text-decoration: underline;\"><span style=\"color: #0a1eb2; font-family: Amaranth; font-weight: normal; font-size: x-large; text-decoration: underline;\"><strong>Introdu\u00e7\u00e3o.<\/strong><\/span><\/span><\/h2>\n<p><span style=\"color: #000000;\">Provavelmente, uma das informa\u00e7\u00f5es mais importantes para um velejador \u00e9 a previs\u00e3o meteorol\u00f3gica para as pr\u00f3ximas horas\/dias e como esta ir\u00e1 afetar o seu percurso, ou seja, a sua viagem planeada. A press\u00e3o atmosf\u00e9rica \u00e9, sem d\u00favida, a vari\u00e1vel mais importante em meteorologia. A grande maioria dos mapas meteorol\u00f3gicos baseia-se nela, e \u00e9 especialmente importante para os marinheiros, uma vez que a velocidade e a dire\u00e7\u00e3o do vento dependem diretamente da distribui\u00e7\u00e3o da press\u00e3o ao n\u00edvel do mar.<\/span><\/p>\n<p><span style=\"color: #000000;\">N\u00e3o h\u00e1 muito tempo, os marinheiros baseavam as suas previs\u00f5es meteorol\u00f3gicas na observa\u00e7\u00e3o frequente da press\u00e3o, olhando para o c\u00e9u e para as nuvens e ajustando as velas quando uma queda repentina da press\u00e3o indicava a chegada de uma tempestade com as suas frentes associadas. Embora hoje tenhamos muito mais meios de obter previs\u00f5es meteorol\u00f3gicas a bordo, a observa\u00e7\u00e3o da press\u00e3o continua a ser uma ferramenta complementar valiosa que vale a pena conhecer e saber interpretar.<\/span><\/p>\n<p><span style=\"color: #000000;\">Quando se trata de saber se o mau tempo se aproxima da posi\u00e7\u00e3o do barco, uma das ferramentas mais simples, se a soubermos utilizar, continua a ser o bar\u00f3metro. Este \u00e9 um instrumento b\u00e1sico que deve estar a bordo de qualquer veleiro oce\u00e2nico e complementa os meios modernos de obten\u00e7\u00e3o de informa\u00e7\u00e3o meteorol\u00f3gica no mar (sat\u00e9lite, GRIBS, etc.).<\/span><\/p>\n<p><span style=\"color: #000000;\">Em termos simples, que todos compreendemos, o mau tempo est\u00e1 geralmente associado a sistemas de baixa press\u00e3o (uma depress\u00e3o). No entanto, uma r\u00e1pida mudan\u00e7a de press\u00e3o indica que o ar est\u00e1 a mover-se rapidamente, o que significa ventos fortes e, consequentemente, mar agitado nas pr\u00f3ximas horas.<\/span><\/p>\n<p><span style=\"color: #000000;\">Esta altera\u00e7\u00e3o de press\u00e3o, combinada com os efeitos da mar\u00e9 barom\u00e9trica, determinar\u00e1 se encontraremos uma situa\u00e7\u00e3o meteorol\u00f3gica control\u00e1vel ou uma potencialmente perigosa. Por conseguinte, \u00e9 importante compreender os fundamentos do que implica uma altera\u00e7\u00e3o de press\u00e3o no mar.<\/span><\/p>\n<p><span style=\"color: #000000;\">Neste novo cap\u00edtulo do livro online &#8220;Meteorologia e Oceanografia para Navegadores&#8221;, iremos abordar os seguintes aspetos relacionados com a press\u00e3o atmosf\u00e9rica:<\/span><\/p>\n<p style=\"padding-left: 40px;\"><span style=\"color: #000000;\">&#8211; Unidades de medida da press\u00e3o atmosf\u00e9rica.<\/span><\/p>\n<p style=\"padding-left: 40px;\"><span style=\"color: #000000;\">&#8211; O bar\u00f3metro.<\/span><\/p>\n<p style=\"padding-left: 40px;\"><span style=\"color: #000000;\">&#8211; A mar\u00e9 barom\u00e9trica.<\/span><\/p>\n<p style=\"padding-left: 40px;\"><span style=\"color: #000000;\">&#8211; Como medir as tend\u00eancias de press\u00e3o com um bar\u00f3metro.<\/span><\/p>\n<p style=\"padding-left: 40px;\"><span style=\"color: #000000;\">&#8211; Considera\u00e7\u00f5es gerais para a interpreta\u00e7\u00e3o de dados meteorol\u00f3gicos com um bar\u00f3metro.<\/span><\/p>\n<p style=\"padding-left: 40px;\"><span style=\"color: #000000;\">&#8211; Previs\u00e3o do tempo com um bar\u00f3metro.<\/span><\/p>\n<p style=\"padding-left: 40px;\"><span style=\"color: #000000;\">&#8211; Considera\u00e7\u00f5es sobre a velocidade do vento e as tend\u00eancias da press\u00e3o.<\/span><span style=\"color: #000000; font-size: large; font-weight: normal;\"><div class=\"ihc-locker-wrap\"><div  class='ihc_locker_3'><div  class='lk_wrapper'><\/div><div class='lock_content'><h2>Este contenido solo est\u00e1 disponible para subscriptores de navegantesoceanicos.com<\/h2>\n<p>Efec\u00fae <strong>Log In<\/strong> para desbloquear.<\/p>\n<\/div><div class='lock_buttons'>\n  <!-- Login Form - Start -->\n  <div class=\"ihc-login-form-wrap ihc-login-template-9\">\n      <form method=\"post\" id=\"ihc_login_form\">\n          <input type=\"hidden\" name=\"ihcaction\" value=\"login\" \/>\n          <input type=\"hidden\" name=\"ihc_login_nonce\" value=\"607b70b767\" \/>\n\n          \n                    <!-- Username field -->\n          <div class=\"impu-form-line-fr\">\n              <i class=\"fa-ihc fa-username-ihc\"><\/i>\n              <input type=\"text\" value=\"\" name=\"log\" id=\"iump_login_username\" placeholder=\"Username\"\/>\n          <\/div>\n          <!-- End of username field -->\n          \n                    <!-- Password field -->\n          <div class=\"impu-form-line-fr\">\n              <i class=\"fa-ihc fa-pass-ihc\"><\/i>\n              <input type=\"password\" value=\"\" name=\"pwd\" id=\"iump_login_password\" placeholder=\"Password\"\/>\n              <span  class=\"ihc-hide-login-pw hide-if-no-js\" data-toggle=\"0\" aria-label=\"Show password\">\n              <span class=\"dashicons dashicons-visibility\" aria-hidden=\"true\"><\/span>\n                <\/span>\n          <\/div>\n          <!-- End of Password field -->\n          \n          \n          <!-- Remember me checkbox -->\n                    <div class=\"impu-remember-wrapper\">\n              <input type=\"checkbox\" value=\"forever\" name=\"rememberme\" class=\"impu-form-input-remember\" \/>\n              <span class=\"impu-form-label-fr impu-form-label-remember\">Manter sess\u00e3o<\/span>\n          <\/div>\n                    <!-- End of remember me --->\n\n                        <div class=\"impu-form-links-pass\"><a href=\"https:\/\/navegantesoceanicos.com\/iump-reset-password\/\">Lost your password?<\/a><\/div>\n          \n          <div class=\"ihc-clear\"><\/div>\n\n          <!-- captcha -->\n                    <!-- end of captcha -->\n\n          <!-- Submit bttn -->\n                        <div class=\"impu-form-line-fr impu-form-submit\">\n                  <input type=\"submit\" value=\"Log In\" name=\"Submit\"  class=\"button button-primary button-large\"\/>\n              <\/div>\n                    <!-- End of Submit bttn -->\n\n          <!-- Social -->\n                    <!-- End of Social -->\n\n          <!-- Additional links -->\n                        <div class=\"impu-form-links\">\n                  <div class=\"impu-form-links-reg\">Don&#039;t have an account?                      <a href=\"https:\/\/navegantesoceanicos.com\/iump-register\/\">Sign Up<\/a>\n                  <\/div>\n              <\/div>\n                    <!-- End of Aditional links -->\n\n      <\/form>\n  <\/div>\n\n  \n  <span class='ihc-js-login-data'\tdata-user_field='#iump_login_username' data-password_field='#iump_login_password' data-error_message='Por favor completa todos los campos requeridos!' ><\/span>\n  <!-- End of Login Form -->\n\n<\/div><\/div><\/div><\/span><\/p>\n<p>[\/et_pb_text][et_pb_image src=&#8221;https:\/\/navegantesoceanicos.com\/wp-content\/uploads\/2022\/09\/proteccion-web-con-ISSN.jpg&#8221; title_text=&#8221;protecci\u00f3n web con ISSN&#8221; _builder_version=&#8221;4.18.1&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_image][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Observar a press\u00e3o para prever o tempo a bordo. Unidades de medida de press\u00e3o, o bar\u00f3metro, a mar\u00e9 barom\u00e9trica, como a medi\u00e7\u00e3o das tend\u00eancias de press\u00e3o com um bar\u00f3metro, a previs\u00e3o do tempo com um bar\u00f3metro e considera\u00e7\u00f5es sobre a velocidade do vento e as tend\u00eancias de press\u00e3o.<\/p>\n","protected":false},"author":2,"featured_media":48175,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":"","_wp_rev_ctl_limit":""},"categories":[219],"tags":[],"class_list":["post-48138","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-meteorologia-e-oceanografia-para-navegantes-oceanicos","et-has-post-format-content","et_post_format-et-post-format-standard"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ 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