Seynisyahanno u malayso in calaamadaha radar -ka ee tilmaamaya joogitaanka harooyinka dhulka hoostiisa ku yaal ee hoostooda dusheeda, laga yaabo inay ka soo baxaan dhoobo, oo aan biyo ahayn.
Raadinta nolosha ee Meeraha Cas
Raadinta nolol ka durugsan meertada Dhulka ayaa noqotay mid ka mid ah waxyaabaha ugu waawayn ee astronomers -ka waxaana la rumeysan yahay in Mars ay tahay meesha ugu wanaagsan ee laga helo daahfurkaas. Noloshu waxay ku baxdaa biyaha joogitaanka iyo daraasadihii ugu dambeeyay waxay soo jiiteen xiisaha adduunka iyagoo soo jeedinaya jiritaanka harooyinka dhulka hoostiisa ku yaal meeraha Cas.
Hadda, saynisyahannada qaarkood waxay u malaynayaan in calaamadaha radar -ka ee soo jeediyay joogitaanka biyaha harooyinkan oo ku yaal dhulka hoostiisa laga yaabo inay ka soo baxaan dhoobada, oo aan biyo ahayn. Saddex waraaqood oo la daabacay intii lagu jiray bishii la soo dhaafay ayaa bixiyay aragtiyo cusub oo ku saabsan calaamadaha qarsoodiga ah, oo qallajinaya mala -awaalka harooyinka.
Sannadkii 2018, koox uu hoggaaminayey Roberto Orosei oo ka tirsan Istituto Nazionale di Astrofisica ee Talyaaniga ayaa ku dhawaaqay caddeyn muujineysa jiritaanka harooyinka dhulka hoostiisa ka hooseysa daboolka barafka ee cirifka koonfureed ee Mars. Kooxdu waxay baratay xog laga helay aalad raadeer oo dul saarnayd Wakaaladda Hawada Sare ee Yurub (ESA) Mars Express orbiter taas oo muujisay calaamado dhalaalaya oo hoos yaal daboolka dabaysha. Calaamadahaas waxaa loo fasiri karaa biyo dareere ah, ayay saynisyahannadu ku doodeen.
Wareeggu wuxuu u adeegsaday calaamadaha radar si uu u dhexgalo dhagaxa iyo barafka, kuwaas oo is -beddelay markii ay ka soo muuqdeen agabyo kala duwan. Si kastaba ha noqotee, cilmi baarayaashu ka dib markii ay baaritaano ku sameeyeen shaybaar qabow waxay hadda soo jeedinayaan in calaamadaha aysan ka imaan biyaha.
Aad u qabow harooyinka
Cilmi -baadhayaashu waxay hadda sheegeen in qaar badan oo ka mid ah harooyinkan laga yaabo inay ku sugan yihiin meelo aad u qabow si aanay biyuhu ugu sii jirin xaalad dareere ah. Aditya R Khuller iyo Jeffrey J Plaut oo ka socda Nasa's Jet Propulsion Laboratory (JPL) ayaa falanqeeyay 44,000 radar oo ka soo baxaya salka daboolka dabaysha muddo 15 sano ah oo indho indhayn ah. Waxay ka heleen calaamado badan oo ka mid ah meelaha u dhow dusha sare, halkaas oo ay tahay inay aad u qabow tahay si biyuhu ugu sii jiraan qaab dareere ah.
Laba kooxood oo kala duwan ayaa sii falanqeeyay xogta si ay u go'aamiyaan in wax kale ay soo saari karaan calaamadahaas. In kasta oo Carver Bierson oo ka tirsan ASU uu dhammaystiray daraasad aragtiyeed ah oo soo jeedineysa dhowr qalab oo suuragal ah oo sababi kara calaamadaha, oo ay ku jiraan dhoobada, Jaamacadda York's Isaac Smith wuxuu cabbiray astaamaha smectites, koox dhoobada ah oo ka jirta Mars oo dhan.
Dhoobada, ma aha biyo
Smith wuxuu saaray dhowr shaybaar oo smectite ah, oo u eg dhagaxyo caadi ah laakiin waxaa sameeyay biyo dareere ah waqti dheer ka hor, oo ku jira dhululubo loogu talagalay in lagu cabbiro sida calaamadaha radarku ula falgalaan iyaga. Kadib wuxuu ku daadiyey nitrogen dareere ah, iyaga oo qaboojiyay ilaa laga jaray 50 digrii Celsius, oo u dhow heerkulka lagu arkay baarka koonfureed ee Martian. Marka la barafeeyo, shay -baarka dhagaxu wuxuu si fiican u waafajiyay indho -indhayntii raadaarka ee uu sameeyay ESA's Mars orbiter.
Kooxdu waxay markaa raadisay joogitaanka dhoobadaas oo kale Mars iyada oo adeegsanaysa MRO, oo sidata khariidad macdanta la yiraahdo Compact Reconnaissance Imaging Spectrometer. Waxay heleen smectites ku kala firdhay agagaarka barafka cirifka koonfureed. "Kooxda Smith waxay muujiyeen in smectite barafaysan ay ka dhigi karto milicsiga in aan loo baahnayn xaddi cusbo ama kulayl aan caadi ahayn oo ay joogaan baarka koonfureed," ayuu yiri JPL.
Ma aha sheegashadii ugu horreysay
Mala -awaalka harada dhulka hoostiisa ma aha kii ugu horreeyay ee soo urursada indho -indheeyayaal caalami ah, 2015 NASA's Mars Reconnaissance Orbiter waxay heshay wax u eg xarriiqyo ciid qoyan oo hoos u dhaadhacaysa, ifafaale la yiraahdo "xarriiqda jaadka soo noqnoqda." Cilmi -baadhayaashu waxay ku ogaadeen saxeexa macdanta la waraabiyay meelaha dhaadheer halkaas oo lagu arkay dhibco dahsoon meeraha Cas. Dhibcooyinkan madmadowga ah ayaa u muuqday kuwo soo jiitamayay oo soconayay waqti ka dib.
Si kastaba ha ahaatee, indho-indhayn soo noqnoqotay, iyadoo la adeegsanayo kaameeraha tijaabada Sayniska Saamaynta Saamaynta Saamaynta-Sare (HiRISE), ayaa muujisay qulqulka granular, halkaas oo badarka ciidda iyo boodhku ay hoos ugu dhaadhacaan si ay u sameeyaan dhibco mugdi ah, halkii ay dhulka ku madoobaan lahayd biyo-arag. Ifafaaladu waxay ka jirtey oo keliya meelaha dhaadheer ee ku filan in miraha qallalan ay hoos ugu dhaadhacaan sida ay u sameeyaan wejiyada godadka firfircoon.
In kasta oo aysan suurtogal ahayn in la xaqiijiyo waxa calaamadaha radar ee dhalaalaya ay yihiin iyadoon laga soo degin cirifka koonfureed ee Mars, haddana daraasadihii ugu dambeeyay waxay bixiyeen sharraxaad macquul ah oo ka caqli badan biyaha dareeraha ah.
