Sautin sararin samaniya

Sautin sararin samaniya
	calculation (en)

Orbital tuning yana nufin tsari na daidaita sikelin lokaci na rikodin wakili na muhalli don haka sauye-sauyen da aka lura sun dace da sake zagayowar Milankovitch a cikin motsi na duniya. Ana yin wannan ne don gyara rashin tabbas ko kuma a lokuta inda ba zai yiwu ba, kamar fiye da kewayon radiocarbon dating. ^[1]

Bayyanawa

Canje-canje a cikin yanayin duniya yana shafar adadin da rarraba hasken rana da Duniya da wasu sassan Duniya ke karɓa.[1] Ana sa ran irin waɗannan canje-canjen za su gabatar da sauye-sauyen yanayi na lokaci-lokaci a kan sikelin lokaci na 20-100 kyr. Ya kamata a yi rikodin dogon lokaci na sedimentation ko yanayi ya rubuta irin waɗannan bambance-bambance. Koyaya, irin waɗannan rubuce-rubucen galibi suna da ƙarancin ƙididdigar shekaru. A sakamakon haka, masana kimiyya wani lokacin za su daidaita lokacin fasalulluka a cikin samfurori don daidaita tsinkayen ka'idar orbital da fatan inganta daidaito na bayanan su. [1]

Hanyoyi da amfani

Ana yin sautin sararin samaniya ta hanyar daidaita ma'aunin lokaci na rikodin paleoclimate don daidaita bambance-bambance a cikin rikodin da ba a yi amfani da shi ba. Wadannan ƙananan gyare-gyare suna daidaita rikodin mai ba da izini ga na zagaye na sararin samaniya. Idan ba haka ba, masana kimiyya suna iya daidaita maki ɗaya ko fiye don samun waɗannan ƙuƙwalwar da suka fi dacewa.^[2] A lokuta masu tsawo, an san canje-canje na tilasta a cikin insolation suna da sigina mai ƙarfi a kan yanayi da yanayin halittu, don haka sautin orbital sau da yawa ƙoƙari ne na daidaita bayanan wakilai tare da sanannen direba (insolation). ^[3]

Hakanan ana iya amfani da sautin sararin samaniya a lokuta inda canje-canje a cikin ƙimar sedimentation ko adanawa na iya haifar da gibin ko hiatuses a cikin rikodin da zai iya rikitar da fassarar rikodin wakilai. Misali, rikice-rikice, canje-canje na muhalli, matakan hazo daban-daban, da sauran matakai na iya haifar da sauye-sauye a cikin sedimentation ko asarar sediments, kuma an yi amfani da sautin orbital don inganta jerin lokutan sediment ko sake dawo da ɓangarorin da suka ɓace na bayanan sediment waɗanda suka ɓace ko suka shafi. Sau da yawa ana amfani da sautin Orbital azaman ma'auni ga tasirin kamar haɗuwa da saman layin ta hanyar hulɗar halittu da / ko wasu rikice-rikice ga samfurori. An kirkiro hanyoyin don tallafawa sakamakon da aka daidaita ta hanyar daidaitawa kamar Bayanan radiometric da sauransu. Za'a iya yin gyaran orbital zuwa ga samfurin duka amma kuma ana iya yin shi a cikin gajeren sassan. Yin amfani da shi a cikin gajeren sassan na iya rage haɗarin sarrafa bayanai sosai. ^[1]

Rashin amincewa

An gabatar da zargi game da sautin orbital kuma sau da yawa wannan kayan aikin yana buƙatar dalilai da yawa don tabbatar da kammalawa.^[1] Lokacin da bambance-bambance a cikin adadin ajiyar sediment ba koyaushe ba ne saboda siginar orbital. Sautin Orbital sau da yawa na iya samun waɗannan tasirin da aka danganta su. Saboda wannan sautin orbital ana amfani dashi kamar yadda ake buƙata a cikin gajeren lokaci don kada a samar da "overtuning" na samfurin. Juyawa yana nufin lokacin da takamaiman rikodin ke amfani da sautin sararin samaniya da yawa kuma duk bayanan da aka nuna suna tallafawa canje-canje na lokaci guda saboda an saita shi don ya dace da wannan takamaiman sikelin lokaci. ^[2] Koyaya, "overtuning" na iya haifar da siffofi masu bayyane waɗanda ba su da tushe a cikin ainihin bayanai, kamar yadda ya faru da rikodin SPECMAP na asali.

Manazarta

1 2 3 Huybers, Peter; Aharonson, Oded (2010). "Orbital tuning, eccentricity, and the frequency modulation of climatic precession: FM TO AM". Paleoceanography (in Turanci). 25 (4): n/a–n/a. doi:10.1029/2010PA001952 – via AGU.
1 2 Malinverno, A.; Erba, E.; Herbert, T. D. (2010). "Orbital tuning as an inverse problem: Chronology of the early Aptian oceanic anoxic event 1a (Selli Level) in the Cismon APTICORE: ORBITAL TUNING AS AN INVERSE PROBLEM". Paleoceanography (in Turanci). 25 (2). doi:10.1029/2009PA001769.
↑ Cite error: Invalid <ref> tag; no text was provided for refs named :42

[:23-1] 1 2 3 Huybers, Peter; Aharonson, Oded (2010). "Orbital tuning, eccentricity, and the frequency modulation of climatic precession: FM TO AM". Paleoceanography (in Turanci). 25 (4): n/a–n/a. doi:10.1029/2010PA001952 – via AGU.

[:1-2] 1 2 Malinverno, A.; Erba, E.; Herbert, T. D. (2010). "Orbital tuning as an inverse problem: Chronology of the early Aptian oceanic anoxic event 1a (Selli Level) in the Cismon APTICORE: ORBITAL TUNING AS AN INVERSE PROBLEM". Paleoceanography (in Turanci). 25 (2). doi:10.1029/2009PA001769.

[:42-3] Cite error: Invalid <ref> tag; no text was provided for refs named :42

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