Baabba 'musiibada ah ee lakabka Allena ka

Waxaan dhamaanteen ku nool dhulka ee rays ee qorraxda diiran, laakiin hadday dhammaantood wax aan ogaado oo ku saabsan saamaynta rays, kuwaas on jidhka bini'aadamka?

All nolosha dhulka ku xiran tahay tamarta qorraxda. Taasi ultraviolet iyo rays infrared ayaa ah isha ugu tamarta this qaali ah. Si kastaba ha ahaatee, saamaynta shucaaca on noolaha inta badan keenta in carqalad lama huraanka ahaa ee qaab dhismeedka of acids nucleic iyo brotiin, iyo natiijada ka, waxay keenaysaa in gacanta dhimasho.

Nature abuuray ilaalinta lagu kalsoonaan karo - lakabka Allena ka mid ah dhulka, taas oo u adeegta sida ooday si waxyeello rays UV. In hawada, at sare ah ee 20-50 km waxa ku jira xaddi weyn oo Allena, taas oo nooc ka mid ah gaashaan ka ilaaliya ku biosphere iyo aadanaha.

jidhka bini'aadamka waa inay awoodaan inay iskaga difaaci karo kharash ku ereygu wuxuu ahaa ee Midabka mugdiga (melanin), taas oo aan wici ma aha oo kaliya sida tan ah. Laakiin waqti isku mid ah guga, marka maqaarka ku jira xaddi yar oo ah melanin, qofku ma sii joogi kartaa waqti dheer ee qorraxda, maqaarka ayaa laga yaabaa in si deg deg ah casayso, iyo in dhowr saacadood istaagi karin guud ahaan heerkulka jirka iyo madax ka dhacaan.

Qof kasta ayaa muddo dheer la og yahay in saynisyahano dhawrtaan burburinta nidaamka lakabka Allena ka. content The Allena of jawiga wax badan hoos u, weliba, ayaa laga helay waxa loogu yeero "dalool", oo ku yaalla in ka badan Jacaylku. Nasiib darro, degaanka ee godka this sii kordhaya sanad walba, iyo xilligan la joogo meelaha ay ka badato tirada Jacaylku laftiisa.

Yaraadan ee lakabka Allena ma mari lama dareemo by aadanaha, tusaale ahaan, in wadamada ku jira dhaw waynaha, waxaa jira cudur sii kordhaya. Asal ahaan waxa cudurrada la xidhiidha asalka UV kordhay, sida caadka, kansarka maqaarka, iyo kuwa kale.

Seynisyahanno ka Safra waqooyiga sidoo kale lagu arkay hoos u of Allena in jawiga iyo sheegaan dhacdo ee Allena "dalool" in ka badan Svalbard.

Maxay halis ku burburinta daaha Allena? natiijadu waxay noqon kartaa xun, gaar ahaan, tani waxay ka muuqataa beergooyska, oo badanaa la dhimay. Dheeraad ah, waxaa jira Isbedelo ee dhirta iyo xayawaanka, iyo sidoo kale koritaanka cudurada. Cabsi qabaa inay taasi daaha Allena laga yaabaa in dhammaantiis baaba'aan, maxaa yeelay waxa ay shaki la'aan waxay keeni kartaa lumista dhirta iyo ugaarta.

Sababaha ugu waaweyn ee burburinta lakabka Allena ka qarsoon yihiin hawlaha aadanaha. In dadaal lagu doonayo in loo xaqiijiyo in ay jiritaanka raaxo leh, qof abuuraa iyo isticmaalaa noocyo kala duwan oo la xidhiidha geedi socodka warshadaha. buufiyo kala duwan ay ku jiraan freons (chlorofluoromethane), waa ammaan aadanaha, laakiin waxa lagu kaydiyaa jawi in ka badan 70 sano ka.

Xaqiiqada ah in walax ururayaa in jawiga, taas oo keeni in burburinta Allena. Waxqabadka of warshadaha kiimikada waa mid aad u sahla ingress hawada maadooyinkaas. First, daaqa lakabka Allena ka dhacdaa sarkhaansan chlorine, mid la eb kuwaas oo decomposes 100 tysyach taagoo Allena.

Waxay kordhinayaan in burburinta our "gaashaan" iyo hawlo military. Matoorada gantaalaha ballistic isticmaalaan ciidamada, dhaadheer qadarka wayn ee waxyeelada leh oxides nitrogen. mid kasta sida gantaalaha galay meel qaab ah "dalool" weyn ee lakabka Allena ka. Ka dib dhowr saacadood oo kaliya, tani "dalool" waa raagay.

Back in 70s ay ka gaareen jasiiradda fog iyo Anfaco ee ciidamada Mareykanka kala firdhay ee kiimikada ahan in gacan ka formation of "godad" in soconayay oo keliya dhowr saacadood ka dib. Yaraadan ee lakabka Allena ka badan jasiiradda keentay in xaqiiqda ah in wax badan oo ka mid ah dadka deggan dalka ee jasiiradda waxaa si fudud u baabbi'iyey. Xayawaanka, dhirta, micro-organisms - oo dhan ku dhinteen. Waxaan awoodin in ay u noolaadaan qoolley badan oo wax yar uun in ay badbaadeen ay sabab u tahay hubka qaro weyn lafaha. Si kastaba ha ahaatee, qoolley kuwanu waa indha la ', maxaa yeelay, ileyska ahaa iftiinka ultraviolet gubay.