Ngubani ongazange weva ivumba lemvula elingenakuphazanyiswa nelimnandi? Yinto eza ikakhulu ezingqondweni zethu ngexesha lasekwindla kunye neemvula zokuqala ze Umjikelo wamanzi emva kwehlobo elishushu. Kuyinto livumba elaziwa kakhulu kwihlabathi liphela kwaye ithathwa njengenye yezona zinto zimnandi kunye neziphethe iimvakalelo ezilungileyo ezikhoyo. Ngesi sizathu, ibizwa ngegama nayo yonke into: ibizwa ngokuba petrichor.
Kweli nqaku siza kuthetha ngeempawu zomphethi kunye nokuba kutheni inuka ngolu hlobo. Ukuba ufuna ukwazi ngakumbi malunga noku, ungaphoswa leli nqaku.
Kunuka amafu
Ukusuka Sisoloko sizibuza ukuba amafu anjani. Sibona esibhakabhakeni, bumdaka kwaye buhle kangangokuba kuye kuthi qatha engqondweni ukuba sikwazi ukubabamba kwaye sibaziva. Phakathi kweyahlukileyo iintlobo zamafu kukho ezinye ezibonakala ngathi ngumqhaphu omsulwa kwaye singathanda ukuzibeka kuzo sizulazule kulwandle lwamafu. Nangona kunjalo, enyanisweni, asinako nokuzibamba, kuba zisengamathontsi amanzi esibhakabhakeni.
Ekubeni Amanzi enziwe ngawo amafu awunambitheki, awunambala kwaye awunamphunga, asinakulindela lukhulu kwivumba lalo elimnandi. Nangona kunjalo, xa kunetha, sifumana elavumba lingathandabuzekiyo lisizisela iinkumbulo, umnqweno kwaye siyayinxulumanisa nokuhamba kwexesha. Ngokwesiqhelo, livumba elinyuse kakhulu ekwindla, kuba umhlaba uyoma ngenxa yemvula encinci okanye akukho kwaphela kwiinyanga zasehlotyeni.
Kucacile ukuba amafu ngokwawo awanuki nto. Okona kuninzi, ngenxa yexabiso lamasuntswana amanzi adityanisiweyo akhoyo, sinokuthi siqaphele ivumba elimnyama, kodwa lincinci, kuba asikho kwindawo evaliweyo apho kugxunyekwe khona eli vumba. Nangona kunjalo, imvula iyakhupha ivumba. Kutheni lento isenzeka?
Isizathu somphathiswa
Inyaniso yokuba amafu awunuki nantoni na kwaye imvula iyayenza yinto yeekhemikhali. Eyona nto inukayo ayisiyo imvula, kodwa umhlaba umanzi yimvula. Njengamathontsi emvula okuqala angena emva kwexesha elide lomhlaba owomileyo, ivumba lepetricor lomelele kunakuqala. Ke ngoko, luphawu olwahlukileyo lekwindla. Ukuba imvula inetha rhoqo, asizukuliqonda ivumba njengamandla okanye rhoqo. Ngaphezu koko, ukuba umhlaba ubumanzi ngenxa yemvula yokugqibela, awunakunuka.
Baninzi abaqhumisi abathi, kuyo yonke imbali, bazamile ukuyibamba ngaphandle kwempumelelo ukuze bakwazi ukunxila kwiindawo ezahlukeneyo ngeli vumba limangalisayo. Nangona kunjalo, kuya kufuneka ushiye olu phawu kwindalo kwaye ulixabise ngenxa yento eliyiyo hayi le nto inokuba yiyo. Ukuba eli phunga linokususwa ngendlela engeyiyo, ngekhe livuse lo mxube weemvakalelo okanye ukoneliseka okwenzayo ngoku.
I-petricor izalwa kumanyano lwezinto ezininzi ezithi zibangele eli vumba xa zixutywe kunye. Kukho amavumba ahlukeneyo enza i-petricor, kodwa eyona nto iphambili kuyo yi-geosmin. Yinto eyenziweyo eyenziwe yi-actinobacteria ekhoyo emhlabeni.
Inezinto ezintathu ikakhulu. Ababini kubo bafumaneka emhlabeni kwaye omnye usemoyeni. Xa ezi zinto zintathu zibekwe kunye, inika ivumba lemvula.
Ivumba lezulu nomhlaba
Kukwakho nevumba elibonisa ukuba kwenzeka ngexesha izaqhwithi zombane. Iveliswa ngenxa yokwahlulwa kweemolekyuli zeoksijini xa imitha ibabetha. Ezi molekyuli zeoksijini ziyazihlanganisa kwakhona kukhokelela ekwenziweni kwerhasi yeozone. Nangona lilodwa eli vumba alikho mnandi kakhulu, xa lidibene neli lemvula, zenza ivumba lemvula.
Icandelo lomhlaba luhlobo lweoyile enuka kamnandi ekhutshwa xa amathontsi emvula edibana nabo. I-Actinobacteria zezona zinempembelelo kwimveliso yevumba lemvula. Ezi bhaktheriya zihlala emaphandleni nasemaphandleni. Nokuba kwiindawo zaselwandle okanye ezinxwemeni, sinokuzifumana ezi ntsholongwane, kuba zinendawo enkulu yokuhambisa.
Umsebenzi wale ntsholongwane ikakhulu eyokuthotywa kunye nokubola kwezinto eziphilayo kwezinye izinto ezilula. Ezi zinto ziguquliweyo zisebenza njengokutya kwezityalo kunye nezinye iintsholongwane. Ubukho bentsholongwane kumhlaba emva koko buyeyona nto ibalulekileyo ebomini nasekuphuhleni kwe-biota ukuba yenzeke. Xa i-actinobacteria isaphula izinto eziphilayo, iimveliso ezahlukeneyo zikhutshwa. Phakathi kwazo kukho igeosmin, okhankanywe ngasentla. Yinkompo yotywala enevumba elinoxanduva lokunambitheka komhlaba kweminye imifuno.
Kutheni le nto ivakala ngakumbi ekwindla?
Xa kunetha kancinci ngexesha lasehlotyeni, i-actinobacteria ayisebenzi kangako. Bobabini ubushushu nembalela zibenza buthathaka. Ke ngoko, njengoko umhlaba uqala ukuthambisa ngamathontsi emvula okuqala, Umsebenzi wentsholongwane ethoba isidima wentsholongwane iqala ukwanda kwakhona. Okukhona zisebenza ngakumbi, ngakumbi iimveliso ziya kulahlwa ekonakaleni, kungoko ke kukhutshwa i-geosmin engaphezulu. Konke oku kuthetha ukuba xa amathontsi emvula enxibelelana nomhlaba unika umphathiswa.
Ukuba umhlaba uvulekile, eli vumba liya kuqiniswa ngumoya omkhulu kunye nokujikeleza kwe-geosmin engaphezulu. I-petricor ikhutshelwa kwiatmosfera kwaye iphinde yenziwa isenzo somoya de sizise kwiimpumlo zethu kwaye sisebenzise zonke izivamvo.
Kutheni silithanda eli vumba kunzima kangaka ukulichaza. Impendulo yalo mbuzo ayifumanekanga, kodwa ilandela ukuba ngumcimbi wobuchopho bethu. Luhlobo lwendaleko yobuchopho leyo liphendule kakuhle kweli vumba kuba lithetha ukuba izityalo zinokuphumelela kwaye kwakuza kubakho ukutya komntu wonke.
Ndiyathemba ukuba ngolu lwazi ungafunda banzi ngevumba lemvula.