Darogan cyfraniadau rhewlifoedd olaf Eryri i gylchredoedd carbon Cyfnod y Dryas Diweddaraf


Darogan cyfraniadau rhewlifoedd olaf Eryri i gylchredoedd carbon Cyfnod y Dryas Diweddaraf
Arwyn Edwards, Sara M. Rassner, Tristram D. L. Irvine-Fynn, Hefin Wyn Williams a Gareth Wyn Griffith

Ceir cefnogaeth gref i’r cysyniad o ecosystemau rhewlifol drwy fesuriadau o gyfraddau sylweddol o gylchu carbon a maetholynnau ar rewlifoedd cyfoes. Serch hynny, ni roddwyd llawer o ystyriaeth i bwysigrwydd posibl y cyfraniadau hyn yn ystod cyfnodau cynt o rewlifiant. Felly modelwyd cynefinoedd a llifoedd carbon ar rai o baleorewlifoedd gogledd Cymru o’r Dryas diweddaraf. Amcangyfrifwyd amsugniad net o 30-180 kg C fesul CO2 y flwyddyn ac allyriad methan rhwng 265-1591 g C fel CH4. Mae hyn yn pwysleisio’r posibilrwydd o gylchu carbon ar rewlifoedd diweddaraf Cymru ond gellir ymestyn ar hyn drwy wella ein sail data cyfoes, archwilio biofarcwyr o fewn gwaddodion a mewngorffori’r data i fodelau llif thermomecanig o ddeinameg rhewlifoedd y Defensaidd.


Cyfeiriad:

 
  	Arwyn Edwards, Sara M. Rassner, Tristram D. L. Irvine-Fynn, Hefin Wyn Williams a Gareth Wyn Griffith., 'Darogan cyfraniadau rhewlifoedd olaf Eryri i gylchredoedd carbon Cyfnod y Dryas Diweddaraf', Gwerddon, 12, Rhagfyr 2012, 53-78.
   

Allweddeiriau

 
    Ecosystemau rhewlifol, rhewlifoedd y Dryas Diweddaraf, Eryri, rhewlifiant; biogeocemeg.
    

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