Gradien panas bumi: Perbedaan antara revisi

|first=Robert |last=Sanders

|title=Radioactive potassium may be major heat source in Earth's core |publisher=UC Berkeley News |date=2003-12-10 |url=http://www.berkeley.edu/news/media/releases/2003/12/10_heat.shtml

|accessdate=2007-02-28 }}</ref> At the center of the planet, the temperature may be up to 7,000&nbsp;K and the pressure could reach 360&nbsp;[[GPa]].<ref>{{cite journal

Temperatur di dalam bumi meningkat seiring dengan meningkatnya kedalaman. Bebatuan yang memiliki viskositas yang tinggi atau setengah meleleh pada temperatur antara 650 ^oC hingga 1200 ^oC diproyeksikan ada di setiap tempat di bawah permukaan bumi pada kedalaman 80 hingga 100 km. Dan temperatur pada kedalaman sekitar 3500 km (batas inti bumi) diperkirakan mencapai 5650 ± 600 [[kelvin]].<ref name='Alfe2003'>{{cite journal|title=Thermodynamics from first principles: temperature and composition of the Earths core|url=http://www.es.ucl.ac.uk/people/d-price/papers/153.pdf|format=PDF|accessdate=2007-03-01|journal=Mineralogical Magazine|date=2003-02-01|first=D.|last=Alfe|coauthors=M. J. Gillan, G. D. Price|volume=67|issue=1|pages=113–123|doi= 10.1180/0026461026610089|journal=Mineralogical Magazine}}</ref><ref name='Gerd2001'>{{cite news |first=Gerd |last=Steinle-Neumann |coauthors= Lars Stixrude, Ronald Cohen |title=New Understanding of Earth’s Inner Core |date=2001-09-05 |publisher=[[Carnegie Institution of Washington]] |url =http://www.carnegieinstitution.org/news_010905.html |work = |pages = |accessdate = 2007-03-01 |language = |archiveurl = http://web.archive.org/web/20061214151031/http://www.carnegieinstitution.org/news_010905.html |archivedate = 2006-12-14}}</ref> Jumlah panas dari bumi diperkirakan mencapai 10³¹ [[joule]].<ref name="IPCC">{{cite journal| first1=Ingvar B. | last1=Fridleifsson, | first2=Ruggero | last2=Bertani | first3=Ernst | last3=Huenges | first4=John W. | last4=Lund | first5=Arni | last5=Ragnarsson | first6=Ladislaus | last6=Rybach | date=2008-02-11 | title=The possible role and contribution of geothermal energy to the mitigation of climate change | conference =IPCC Scoping Meeting on Renewable Energy Sources | editor = O. Hohmeyer and T. Trittin | location = Luebeck, Germany | pages = 59–80 | url = http://iga.igg.cnr.it/documenti/IGA/Fridleifsson_et_al_IPCC_Geothermal_paper_2008.pdf | format = pdf | accessdate = 2009-04-06}}</ref>

*Sekitar 45-90 persen panas yang keluar dari bumi berasal dari [[peluruhan radioaktif]] unsur yang terkonsentrasi di permukaan.<ref name='Anuta2006'>{{cite news |first=Joe |last=Anuta |title=Probing Question: What heats the earth's core? |date=2006-03-30 |publisher=physorg.com |url=http://www.physorg.com/news62952904.html |accessdate = 2007-09-19 }}</ref><ref name="turcotte">{{cite book

Panas dari dalam bumi dicukupkan oleh peluruhan radioaktif pada laju 30 TW.<ref name="sustainability">{{Cite news |last = Rybach |first = Ladislaus |date =September 2007 |title =Geothermal Sustainability |periodical =Geo-Heat Centre Quarterly Bulletin |publication-place =Klamath Falls, Oregon |publisher =Oregon Institute of Technology |volume =28 |issue =3 |pages = 2–7 |url =http://geoheat.oit.edu/bulletin/bull28-3/art2.pdf |issn =0276-1084 |accessdate =2009-05-09}}</ref> Laju aliran panas bumi secara keseluruhan mencapai lebih dari dua kali konsumsi energi manusia dari segala sumber.