Mutane, kamar dukkanin dabbobi masu shayarwa, zamu iya daidaita yanayin zafin jikinmu ta hanyar hypothalamus, wanda wani bangare ne na kwakwalwa dake cikin kwakwalwa wanda yake aiki kwatankwacin na’urar auna zafin jiki: lokacin da yawan zafin gidan ya fi yadda aka saita shi, sai ya tsayar da dumama don rage ta.
La zafi zafi Jin sanyi ne ko zafi wanda muke ji bisa ga haɗuwa da sigogin yanayi, daga cikinsu akwai laima da iska. Amma, Yaya ake lissafta shi?
Ba za mu sami irin wannan zafin ba a ranar da ma'aunin zafi da zafi ya karanta 35ºC da iska ta kudu da ke kadawa a kilomita 20 cikin awa ɗaya, fiye da a wata rana da ke da zafin jiki iri ɗaya amma ba tare da iska ba. Me ya sa? Domin a kewayen jikin duka ana tara iska a ciki, ana kiran shi da iyaka. Mafi siririn shine saboda tasirin iska, mafi girman asarar hasara.
Beingsan Adam suna da zafin jikinsu na digiri 37 a ma'aunin Celsius. Koyaya, a cewar karatu daban-daban zamu iya ɗaukar digiri 55 tare da ɗumi na yau da kullun, ko mafi girma a cikin ƙananan yanayin zafi. Misali shine saunas, inda yawan zafin jiki yakai digiri 100 kuma mutanen da suke zuwa wurin suna tafiya da ƙafafunsu da ƙafa bayan zaman 😉.
Yanzu, idan yanayin zafi yayi yawa ko yayi yawa to zamu sami matsala. Tare da ɗumi 100%, za mu jimre ne da digiri 45 na aan mintoci kaɗan, kamar yadda tururin ruwa zai taru a cikin huhu.
Yaya ake auna sanyi? A shekara ta 2001 Masana kimiyya da Kanada da Amurka sun kafa wata ingantacciyar hanyar da suka samu ta hanyar gwaje-gwajen gwaje-gwaje masu amfani da jiragen sama a yanayin zafi daban-daban da kuma tsananin iska a fuska da kuma duba asarar zafin da fatarsu ta fuskanta. Shin na gaba:
Tst = 13.112 + 0.6215 Ta -11.37 V0.16 + 0.3965 Ta V0.16
Don haka zamu iya gano cewa tare da zafin jiki na 10ºC da iska na 50km / h, sakamakon tasirin yanayin zai kasance -2ºC. Don haka ya fi ban sha'awa a kula da jikinmu a gaban ma'aunin zafin jiki don sanin irin tufafin da ya kamata mu sa.