File:Klima-Archiv Eislabor (ZDF, Terra X) 720p HD 50FPS cy.webm
Original file (WebM audio/video file, VP8/Vorbis, length 2 min 2 s, 1,077 × 606 pixels, 1.63 Mbps overall, file size: 23.75 MB)
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[edit]DescriptionKlima-Archiv Eislabor (ZDF, Terra X) 720p HD 50FPS cy.webm |
Cymraeg: Archif o ddata ar newid hinsawdd yn yr Artig. Fideo gan Terra X; trosleisio a llais: Robin Llwyd ab Owain.
Testun: O fewn Sefydlaid Alfred Wegener, yn yr Antartig, mae na wyddonwyr yn ymchwilio i sut mae'r hinsawdd wedi newid yn hanes y Ddaear. Mae'r creiddiau iâ (neu 'ice cores') yn fath o archif o hanes hinsawdd y Ddaear. Ym mhob un, mae na wybodaeth am y nwyon ty-gwydr yn yr amgylchedd a hynny dros filoedd o flynyddoedd. "Tynnwyd y craidd-iâ yma, er enghraifft, 808 i 809 metr o dan yr wyneb. Mae hi wastad yn bwrw eira yn yr Antartig, ac mae nodweddion gwahanol yr atmosffer yn glynnu yn yr eira hwn yn wrth iddo ddisgyn. Wrth ddrilio i lawr yr haen drwchus o rew, rydan ni'n mynd yn ôl mewn hanes! Mi fedra i wedyn ymchwilio yr hen haenau yma a chanfod nodweddion yr atmosffer yr amser hwnnw. Er enghraifft, dyma haen o ludw tywyll o losgfynydd, sydd fel y gwelwch tua dwy gentimetr o drwch!" I ddadansoddi'r sampl, mae'r gwyddonwyr yn tynnu'r nwyon o'r rhew, Mewn dull reit debyg i ymchwil fforensig ar gorff ein planed! "Mae gen i graidd-iâ yma, ac wrth gwrs, mae'n cynnwys data o atmosffer y cyfnod y cafodd ei greu,data cemegol a ffisegol... a'r hyn sy'n bwysig am iâ yw fod ynddo lawer o swigod o aer. O'r swigod aer yma rydym yn casglu'r "paleo", sef aer yr hen oes; gwnawn hyn drwy ddadmer y sampl. |
Date | |
Source | Own work |
Author | ZDF/Terra X/SPIEGEL TV/Christopher Gerisch/Tilman Remme/Reiner Bauer, Oliver Gurr/Oliver Roetz/Hauke Ketelsen/Richard Sako, Llywelyn2000 |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 08:56, 31 August 2020 | 2 min 2 s, 1,077 × 606 (23.75 MB) | Llywelyn2000 (talk | contribs) | Uploaded own work with UploadWizard |
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