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Statements

Subject Item
n2:RIV%2F67985530%3A_____%2F14%3A00433126%21RIV15-AV0-67985530
rdf:type
skos:Concept n15:Vysledek
dcterms:description
Rapid gas hydrate release (the %22clathrate gun%22 hypothesis) has been invoked as a cause for the rapid global warming and associated negative carbon isotope excursion observed during the Latest Permian Extinction (LPE). We modeled the stability of gas hydrates through a warming Middle to Late Permian world, considering three settings for methane reservoirs: 1) terrestrial hydrates, 2) hydrates on exposed continental shelves during glacial sea level drop, and 3) hydrates in deep marine settings. Model results show that terrestrial hydrates would rapidly destabilize over similar to 400 ky after deglaciation for moderate heatflow (40 mW/m(2)), and more rapidly for higher heat flow values. Exposed continental shelves would lose hydrates even more rapidly, after being flooded due to loss of ice storage on land. These two major hydrate reservoirs would thus have destabilized during the Middle to Late Permian climate warming, well prior to the LPE event. Rapid gas hydrate release (the %22clathrate gun%22 hypothesis) has been invoked as a cause for the rapid global warming and associated negative carbon isotope excursion observed during the Latest Permian Extinction (LPE). We modeled the stability of gas hydrates through a warming Middle to Late Permian world, considering three settings for methane reservoirs: 1) terrestrial hydrates, 2) hydrates on exposed continental shelves during glacial sea level drop, and 3) hydrates in deep marine settings. Model results show that terrestrial hydrates would rapidly destabilize over similar to 400 ky after deglaciation for moderate heatflow (40 mW/m(2)), and more rapidly for higher heat flow values. Exposed continental shelves would lose hydrates even more rapidly, after being flooded due to loss of ice storage on land. These two major hydrate reservoirs would thus have destabilized during the Middle to Late Permian climate warming, well prior to the LPE event.
dcterms:title
Gas hydrate contribution to Late Permian global warming Gas hydrate contribution to Late Permian global warming
skos:prefLabel
Gas hydrate contribution to Late Permian global warming Gas hydrate contribution to Late Permian global warming
skos:notation
RIV/67985530:_____/14:00433126!RIV15-AV0-67985530
n3:aktivita
n12:I
n3:aktivity
I
n3:cisloPeriodika
May
n3:dodaniDat
n7:2015
n3:domaciTvurceVysledku
n17:6715125
n3:druhVysledku
n13:J
n3:duvernostUdaju
n9:S
n3:entitaPredkladatele
n14:predkladatel
n3:idSjednocenehoVysledku
17927
n3:idVysledku
RIV/67985530:_____/14:00433126
n3:jazykVysledku
n16:eng
n3:klicovaSlova
Latest Permian extinction; gas hydrates; carbon isotope shift
n3:klicoveSlovo
n4:carbon%20isotope%20shift n4:gas%20hydrates n4:Latest%20Permian%20extinction
n3:kodStatuVydavatele
NL - Nizozemsko
n3:kontrolniKodProRIV
[50F1D35F9BF6]
n3:nazevZdroje
Earth and Planetary Science Letters
n3:obor
n11:DC
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
4
n3:rokUplatneniVysledku
n7:2014
n3:svazekPeriodika
393
n3:tvurceVysledku
Šafanda, Jan Majorowicz, J. Grasby, S. E. Beauchamp, B.
n3:wos
000335103800026
s:issn
0012-821X
s:numberOfPages
11
n6:doi
10.1016/j.epsl.2014.03.003