Menene sanyin iska kuma yaya ake lissafta shi?

Dukanmu mun ji magana ko dai daga masu nazarin yanayi, aikace-aikacen hannu waɗanda ke gaya mana yanayin ko kuma ta hanyar al'ada baki ɗaya, cewa "yana da irin wannan zafin jiki da irin wannan yanayin zafin yanayin." Wannan zafi zafi yana iya ko bazai bambanta da ainihin zazzabin da muke ciki ba.

Shin da gaske mun san menene wannan sanyin iska da yadda masu ilimin yanayi sun kirga shi?

A ranar hunturu ko ranar bazara ba mu jin zafi ko sanyi iri ɗaya idan iska, zafi ko ruwan sama. Wataƙila muna cikin ranar hunturu mai digiri 9 na zafin jiki amma babu iska, duk nutsuwa da rana kuma ba daidai yake da rana ɗaya da yanayi ɗaya ba amma ana ruwan sama ko kuma da iska ta arewa. Wannan shine bambancin da muke kira yanayin zafi. Shin sanyi ko zafi da muke tsinkaye ba tare da la'akari da ainihin zafin jiki ba wanda muhallin yake.

Wancan banbancin a yanayin zafi tsakanin yanayin jin fata, yanayin da yake kewaye da mu da kuma saurin iska sune suke tantance yawan zafin da muke rasa daga jikin mu kuma shine yake sanya mu jin sanyi ko zafi. A lokacin sanyi mun san cewa haɗuwa da sanyi da iska a cikin wuraren da suka fi bayyana a jikinmu shine yake tantance yawan zafin da muke rasa. Wannan shine dalilin da ya sa yana da mahimmanci a sa tufafi masu dumi don rage farfajiyar da ke fuskantar waɗannan canje-canje na yanayin zafin jiki da asarar zafin jiki. Yawancin lokaci, sassan jikin da suka fi fuskantar wannan yanayi na zafi shi ne hannu, fuska da, wani lokacin, ƙafa.

Wannan yanayin zafi yana tayar da sha'awa da sha'awa ga 'yan ƙasa, tunda wani lokacin kuma tare da ƙimar dangi, mun sami kanmu a cikin ranakun hunturu wanda muke kallon ma'aunin zafi da sanyin ajiyar yanayin ba sanyi sosai. Duk da haka, muna sanyi. Wannan saboda idan akwai babban zafi ko iska mai sanyiDole ne mu lulluɓe kanmu da kyau saboda za a ba da kyakkyawan yanayin fata don zafin jikinmu.

Don haka, a taƙaice zamu iya bayyana ma'anar yanayin zafi kamar haka zazzabi wanda ya danganci manunin hasarar zafin jiki wanda ya haɗu ta hanyar haɗuwa da yanayin zafin jiki, iska da ƙarancin zafi.

Yaya ake lissafin sanyin iska?

Mun san cewa yanayin sanyi ko zafi na iya bambanta dangane da yanayin iska, yanayin zafi, dss. Amma yaya ake lissafin sanyin iska?

Akwai teburin da ke lissafin abin da yanayin zafi yake da shi iska da zafin jiki. Babu shakka idan muka kirkiri kalmar sanyi ta iska a matsayin wani abu na asali, waɗannan teburin ba zasu da wani amfani mai yawa ba. Wato, kowane mutum yana da irin fahimtarsa ​​da juriyarsa yayin fuskantar zafi da sanyi. Wani lokaci, akwai mutanen da zasu iya zama a cikin gajerun hannayen riga tare da 10 ° C da sauransu waɗanda suke buƙatar mafaka da yawa a yanayin zafin jiki ɗaya. Wannan ba yana nufin cewa yanayin yanayi na iya zama 10 ° C ba, amma yanayin zafi, saboda iska ko yanayin zafi, shine 7 ° C. Wato, kodayake ainihin zazzabi yakai 10 ° C, mu muna hango shi kamar yana da 7 ° C.

Misali, bisa ga waɗannan teburin, a yanayin zafin jiki na 0 ° C kuma tare da iska mai sanyi, da alama ba za mu ji sanyi sosai ba idan muna sanye da dumi. Koyaya, tare da yanayin zafin jiki guda ɗaya amma tare da iska kusan 40 km / h, yanayin zafi da zamu samu zai kasance -15 ° C kuma zai fi sanyi. A matsayin son sani, idan muka tsaya a 0 ° C da iska mai ƙarfi sama da kilomita 65 / h yana iya haifar mana da matsalolin lafiya.

Lissafi na yanayin zafi ba sauki, saboda mun kalli teburin kuma hakane, amma ta yaya aka kirga waɗannan ƙimomin? Da kyau, a ƙarshen 1930s, mai bincike Paul Simple kafa tsarin zuwa tsarin lissafi na farko na lissafin abin da ya shafi yanayin zafi tun da ya ga cewa a wuraren da ke kan iyakoki, idan yanayin zafi ya hadu da iska mai karfi, daskarewa za ta kara zuwa saboda haka ne aka haifar da yanayi mafi hatsari .

An inganta wannan tsari tun tsawon shekaru har zuwa iyakansa a shekara ta 2001 ta hanyar yarjejeniya tsakanin masanan Kanada da Amurka.Hanyar tabbatacciyar dabara don kirga yanayin zafi shine:

Tst = 13.112 + 0.6215 Ta -11.37 V0.16 + 0.3965 Ta V0.16

Idan muka kara dabi'u a tsarinmu zamu iya hasashen yanayin zafin da zamu ji yayin fita, ta wannan hanyar zamu san yadda za mu sanya tufafi mafi kyau don ciyar da sanyin jiki yadda ya kamata kuma mu guje wa sanyi.