{"id":100,"date":"2014-08-29T10:35:13","date_gmt":"2014-08-29T13:35:13","guid":{"rendered":"https:\/\/wp.ufpel.edu.br\/agrometeorologia\/?page_id=100"},"modified":"2014-08-29T10:35:13","modified_gmt":"2014-08-29T13:35:13","slug":"sensacao-termica","status":"publish","type":"page","link":"https:\/\/wp.ufpel.edu.br\/agrometeorologia\/informacoes\/sensacao-termica\/","title":{"rendered":"Sensa\u00e7\u00e3o t\u00e9rmica"},"content":{"rendered":"

SENSA\u00c7\u00c3O T\u00c9RMICA<\/span><\/h3>\n

Sensa\u00e7\u00e3o t\u00e9rmica \u00e9 a temperatura virtual ou a combina\u00e7\u00e3o da temperatura com outros fatores meteorol\u00f3gicos, como o vento, que representa com mais precis\u00e3o o impacto das condi\u00e7\u00f5es do tempo sobre o nosso organismo.<\/p>\n

O estudo da influ\u00eancia da velocidade do vento, combinada com o valor da temperatura do ar foi iniciado ainda na d\u00e9cada de 30, na Ant\u00e1rtida, pelo cientista americano Paul Siple. Sipple fez experi\u00eancias com recipientes pl\u00e1sticos cil\u00edndricos cheios de \u00e1gua em temperaturas diversas, expostos \u00e0s diferentes condi\u00e7\u00f5es de temperaturas do ar e velocidades do vento. Marcando o tempo em que a \u00e1gua demorava para congelar, ele conseguiu estimar a quantidade de calor dissipada pela a\u00e7\u00e3o dos elementos meteorol\u00f3gicos e, com isso, conseguiu estabelecer uma equa\u00e7\u00e3o relacionando a perda de calor do corpo humano com a pele seca em rela\u00e7\u00e3o a estes dois elementos: temperatura do ar e velocidade do vento.
\n\"windchill_02\"<\/a>
\nPosteriormente, com base na equa\u00e7\u00e3o de Siple, foi desenvolvida a rela\u00e7\u00e3o entre a temperatura ambiente, a velocidade do vento e a temperatura da pele seca do ser humano, dando como resultado um novo valor de temperatura, a qual foi denominada de “sensa\u00e7\u00e3o t\u00e9rmica”, que, tecnicamente, \u00e9 conhecida como\u00a0Temperatura Equivalente de Windchill (Tw)<\/b>. A sensa\u00e7\u00e3o t\u00e9rmica, representa, portanto, a temperatura que sentimos quando estamos expostos a determinadas condi\u00e7\u00f5es de temperatura do ar e de velocidade do vento.<\/p>\n

Tw pode ser calculada pela seguinte rela\u00e7\u00e3o:<\/p>\n

<\/span><\/p>\n

Tw = [(10*raiz(v) + 10,45 – v) x (T – 33) + 726]\/22
\nonde T \u00e9 a temperatura do ar (o<\/sup>C) e v \u00e9 a velocidade do vento (m\/s). A tabela a seguir foi montada como exemplo do uso dessa equa\u00e7\u00e3o.<\/p>\n

<\/span><\/p>\n

 <\/p>\n\n\n\n
Velocidade do Vento<\/span><\/td>\nTemperatura do Ar –\u00a0o<\/sup>C<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
m\/s<\/span><\/td>\n0<\/span><\/td>\n1<\/span><\/td>\n2<\/span><\/td>\n3<\/span><\/td>\n4<\/span><\/td>\n5<\/span><\/td>\n6<\/span><\/td>\n7<\/span><\/td>\n8<\/span><\/td>\n9<\/span><\/td>\n10<\/span><\/td>\n<\/tr>\n
0.0<\/span><\/td>\n17.3<\/span><\/td>\n17.8<\/span><\/td>\n18.3<\/span><\/td>\n18.8<\/span><\/td>\n19.2<\/span><\/td>\n19.7<\/span><\/td>\n20.2<\/span><\/td>\n20.7<\/span><\/td>\n21.1<\/span><\/td>\n21.6<\/span><\/td>\n22.1<\/span><\/td>\n<\/tr>\n
0.5<\/span><\/td>\n7.5<\/span><\/td>\n8.2<\/span><\/td>\n9.0<\/span><\/td>\n9.8<\/span><\/td>\n10.6<\/span><\/td>\n11.3<\/span><\/td>\n12.1<\/span><\/td>\n12.9<\/span><\/td>\n13.7<\/span><\/td>\n14.4<\/span><\/td>\n15.2<\/span><\/td>\n<\/tr>\n
1.0<\/span><\/td>\n3.8<\/span><\/td>\n4.7<\/span><\/td>\n5.6<\/span><\/td>\n6.5<\/span><\/td>\n7.4<\/span><\/td>\n8.2<\/span><\/td>\n9.1<\/span><\/td>\n10.0<\/span><\/td>\n10.9<\/span><\/td>\n11.8<\/span><\/td>\n12.7<\/span><\/td>\n<\/tr>\n
1.5<\/span><\/td>\n1.2<\/span><\/td>\n2.2<\/span><\/td>\n3.1<\/span><\/td>\n4.1<\/span><\/td>\n5.1<\/span><\/td>\n6.0<\/span><\/td>\n7.0<\/span><\/td>\n7.9<\/span><\/td>\n8.9<\/span><\/td>\n9.9<\/span><\/td>\n10.8<\/span><\/td>\n<\/tr>\n
2.0<\/span><\/td>\n-0.9<\/span><\/td>\n0.1<\/span><\/td>\n1.2<\/span><\/td>\n2.2<\/span><\/td>\n3.2<\/span><\/td>\n4.2<\/span><\/td>\n5.3<\/span><\/td>\n6.3<\/span><\/td>\n7.3<\/span><\/td>\n8.4<\/span><\/td>\n9.4<\/span><\/td>\n<\/tr>\n
2.5<\/span><\/td>\n-2.6<\/span><\/td>\n-1.6<\/span><\/td>\n-0.5<\/span><\/td>\n0.6<\/span><\/td>\n1.7<\/span><\/td>\n2.8<\/span><\/td>\n3.8<\/span><\/td>\n4.9<\/span><\/td>\n6.0<\/span><\/td>\n7.1<\/span><\/td>\n8.2<\/span><\/td>\n<\/tr>\n
3.0<\/span><\/td>\n-4.2<\/span><\/td>\n-3.0<\/span><\/td>\n-1.9<\/span><\/td>\n-0.8<\/span><\/td>\n0.3<\/span><\/td>\n1.5<\/span><\/td>\n2.6<\/span><\/td>\n3.7<\/span><\/td>\n4.9<\/span><\/td>\n6.0<\/span><\/td>\n7.1<\/span><\/td>\n<\/tr>\n
3.5<\/span><\/td>\n-5.5<\/span><\/td>\n-4.3<\/span><\/td>\n-3.2<\/span><\/td>\n-2.0<\/span><\/td>\n-0.8<\/span><\/td>\n0.3<\/span><\/td>\n1.5<\/span><\/td>\n2.7<\/span><\/td>\n3.8<\/span><\/td>\n5.0<\/span><\/td>\n6.2<\/span><\/td>\n<\/tr>\n
4.0<\/span><\/td>\n-6.7<\/span><\/td>\n-5.5<\/span><\/td>\n-4.3<\/span><\/td>\n-3.1<\/span><\/td>\n-1.9<\/span><\/td>\n-0.7<\/span><\/td>\n0.5<\/span><\/td>\n1.7<\/span><\/td>\n2.9<\/span><\/td>\n4.1<\/span><\/td>\n5.3<\/span><\/td>\n<\/tr>\n
4.5<\/span><\/td>\n-7.7<\/span><\/td>\n-6.5<\/span><\/td>\n-5.3<\/span><\/td>\n-4.0<\/span><\/td>\n-2.8<\/span><\/td>\n-1.6<\/span><\/td>\n-0.3<\/span><\/td>\n0.9<\/span><\/td>\n2.1<\/span><\/td>\n3.4<\/span><\/td>\n4.6<\/span><\/td>\n<\/tr>\n
5.0<\/span><\/td>\n-8.7<\/span><\/td>\n-7.5<\/span><\/td>\n-6.2<\/span><\/td>\n-4.9<\/span><\/td>\n-3.7<\/span><\/td>\n-2.4<\/span><\/td>\n-1.1<\/span><\/td>\n0.1<\/span><\/td>\n1.4<\/span><\/td>\n2.7<\/span><\/td>\n3.9<\/span><\/td>\n<\/tr>\n
5.5<\/span><\/td>\n-9.6<\/span><\/td>\n-8.3<\/span><\/td>\n-7.0<\/span><\/td>\n-5.7<\/span><\/td>\n-4.4<\/span><\/td>\n-3.1<\/span><\/td>\n-1.9<\/span><\/td>\n-0.6<\/span><\/td>\n0.7<\/span><\/td>\n2.0<\/span><\/td>\n3.3<\/span><\/td>\n<\/tr>\n
6.0<\/span><\/td>\n-10.4<\/span><\/td>\n-9.1<\/span><\/td>\n-7.8<\/span><\/td>\n-6.5<\/span><\/td>\n-5.2<\/span><\/td>\n-3.8<\/span><\/td>\n-2.5<\/span><\/td>\n-1.2<\/span><\/td>\n0.1<\/span><\/td>\n1.4<\/span><\/td>\n2.7<\/span><\/td>\n<\/tr>\n
6.5<\/span><\/td>\n-11.2<\/span><\/td>\n-9.8<\/span><\/td>\n-8.5<\/span><\/td>\n-7.2<\/span><\/td>\n-5.8<\/span><\/td>\n-4.5<\/span><\/td>\n-3.1<\/span><\/td>\n-1.8<\/span><\/td>\n-0.5<\/span><\/td>\n0.9<\/span><\/td>\n2.2<\/span><\/td>\n<\/tr>\n
7.0<\/span><\/td>\n-11.9<\/span><\/td>\n-10.5<\/span><\/td>\n-9.1<\/span><\/td>\n-7.8<\/span><\/td>\n-6.4<\/span><\/td>\n-5.1<\/span><\/td>\n-3.7<\/span><\/td>\n-2.3<\/span><\/td>\n-1.0<\/span><\/td>\n0.4<\/span><\/td>\n1.7<\/span><\/td>\n<\/tr>\n
7.5<\/span><\/td>\n-12.5<\/span><\/td>\n-11.1<\/span><\/td>\n-9.7<\/span><\/td>\n-8.4<\/span><\/td>\n-7.0<\/span><\/td>\n-5.6<\/span><\/td>\n-4.2<\/span><\/td>\n-2.9<\/span><\/td>\n-1.5<\/span><\/td>\n-0.1<\/span><\/td>\n1.3<\/span><\/td>\n<\/tr>\n
8.0<\/span><\/td>\n-13.1<\/span><\/td>\n-11.7<\/span><\/td>\n-10.3<\/span><\/td>\n-8.9<\/span><\/td>\n-7.5<\/span><\/td>\n-6.1<\/span><\/td>\n-4.7<\/span><\/td>\n-3.3<\/span><\/td>\n-1.9<\/span><\/td>\n-0.5<\/span><\/td>\n0.9<\/span><\/td>\n<\/tr>\n
8.5<\/span><\/td>\n-13.7<\/span><\/td>\n-12.2<\/span><\/td>\n-10.8<\/span><\/td>\n-9.4<\/span><\/td>\n-8.0<\/span><\/td>\n-6.6<\/span><\/td>\n-5.2<\/span><\/td>\n-3.8<\/span><\/td>\n-2.3<\/span><\/td>\n-0.9<\/span><\/td>\n0.5<\/span><\/td>\n<\/tr>\n
9.0<\/span><\/td>\n-14.2<\/span><\/td>\n-12.7<\/span><\/td>\n-11.3<\/span><\/td>\n-9.9<\/span><\/td>\n-8.5<\/span><\/td>\n-7.0<\/span><\/td>\n-5.6<\/span><\/td>\n-4.2<\/span><\/td>\n-2.7<\/span><\/td>\n-1.3<\/span><\/td>\n0.1<\/span><\/td>\n<\/tr>\n
9.5<\/span><\/td>\n-14.7<\/span><\/td>\n-13.2<\/span><\/td>\n-11.8<\/span><\/td>\n-10.3<\/span><\/td>\n-8.9<\/span><\/td>\n-7.4<\/span><\/td>\n-6.0<\/span><\/td>\n-4.5<\/span><\/td>\n-3.1<\/span><\/td>\n-1.7<\/span><\/td>\n-0.2<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/p>\n

Para saber mais fa\u00e7a uma busca na internet com as palavras chaves “sensa\u00e7\u00e3o t\u00e9rmica” ou “wind chill”\u00a0<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

SENSA\u00c7\u00c3O T\u00c9RMICA Sensa\u00e7\u00e3o t\u00e9rmica \u00e9 a temperatura virtual ou a combina\u00e7\u00e3o da temperatura com outros fatores meteorol\u00f3gicos, como o vento, que representa com mais precis\u00e3o o impacto das condi\u00e7\u00f5es do tempo sobre o nosso organismo. O estudo da influ\u00eancia da velocidade do vento, combinada com o valor da temperatura do ar foi iniciado ainda na […]<\/p>\n","protected":false},"author":322,"featured_media":0,"parent":48,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"jetpack_post_was_ever_published":false,"footnotes":""},"class_list":["post-100","page","type-page","status-publish","hentry"],"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/P4ZCJ0-1C","_links":{"self":[{"href":"https:\/\/wp.ufpel.edu.br\/agrometeorologia\/wp-json\/wp\/v2\/pages\/100","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wp.ufpel.edu.br\/agrometeorologia\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/wp.ufpel.edu.br\/agrometeorologia\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/wp.ufpel.edu.br\/agrometeorologia\/wp-json\/wp\/v2\/users\/322"}],"replies":[{"embeddable":true,"href":"https:\/\/wp.ufpel.edu.br\/agrometeorologia\/wp-json\/wp\/v2\/comments?post=100"}],"version-history":[{"count":1,"href":"https:\/\/wp.ufpel.edu.br\/agrometeorologia\/wp-json\/wp\/v2\/pages\/100\/revisions"}],"predecessor-version":[{"id":118,"href":"https:\/\/wp.ufpel.edu.br\/agrometeorologia\/wp-json\/wp\/v2\/pages\/100\/revisions\/118"}],"up":[{"embeddable":true,"href":"https:\/\/wp.ufpel.edu.br\/agrometeorologia\/wp-json\/wp\/v2\/pages\/48"}],"wp:attachment":[{"href":"https:\/\/wp.ufpel.edu.br\/agrometeorologia\/wp-json\/wp\/v2\/media?parent=100"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}