| 000 | 04159nlm1a2200469 4500 | ||
|---|---|---|---|
| 001 | 656221 | ||
| 005 | 20231030041418.0 | ||
| 035 | _a(RuTPU)RU\TPU\network\22656 | ||
| 090 | _a656221 | ||
| 100 | _a20171101a2017 k y0engy50 ba | ||
| 101 | 0 | _aeng | |
| 102 | _aDE | ||
| 135 | _adrcn ---uucaa | ||
| 181 | 0 | _ai | |
| 182 | 0 | _ab | |
| 200 | 1 |
_aDistinguishing between old and modern permafrost sources in the northeast Siberian land-shelf system with compound-specific δ2H analysis _fJ. E. Vonk [et al.] |
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| 203 |
_aText _celectronic |
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| 300 | _aTitle screen | ||
| 320 | _a[References: p. 1892-1895] | ||
| 330 | _aPleistocene ice complex permafrost deposits contain roughly a quarter of the organic carbon (OC) stored in permafrost (PF) terrain. When permafrost thaws, its OC is remobilized into the (aquatic) environment where it is available for degradation, transport or burial. Aquatic or coastal environments contain sedimentary reservoirs that can serve as archives of past climatic change. As permafrost thaw is increasing throughout the Arctic, these reservoirs are important locations to assess the fate of remobilized permafrost OC.We here present compound-specific deuterium (δ2H) analysis on leaf waxes as a tool to distinguish between OC released from thawing Pleistocene permafrost (ice complex deposits; ICD) and from thawing Holocene permafrost (from near-surface soils). Bulk geochemistry (%OC; δ13C; %total nitrogen, TN) was analyzed as well as the concentrations and δ2H signatures of long-chain n-alkanes (C21 to C33) and mid- to long-chain n-alkanoic acids (C16 to C30) extracted from both ICD-PF samples (n = 9) and modern vegetation and O-horizon (topsoil-PF) samples (n = 9) from across the northeast Siberian Arctic. Results show that these topsoil-PF samples have higher %OC, higher OC ∕ TN values and more depleted δ13C-OC values than ICD-PF samples, suggesting that these former samples trace a fresher soil and/or vegetation source. Whereas the two investigated sources differ on the bulk geochemical level, they are, however, virtually indistinguishable when using leaf wax concentrations and ratios. | ||
| 461 |
_tCryosphere _d2008- |
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| 463 |
_tVol. 11, iss. 4 _v[P. 1879-1895] _d2017 |
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| 610 | 1 | _aэлектронный ресурс | |
| 610 | 1 | _aтруды учёных ТПУ | |
| 610 | 1 | _aвечная мерзлота | |
| 610 | 1 | _aАрктика | |
| 610 | 1 | _aисследование | |
| 610 | 1 | _aклиматические изменения | |
| 701 | 1 |
_aVonk _bJ. E. _gJorien |
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| 701 | 1 |
_aTesi _bT. _gTommaso |
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| 701 | 1 |
_aBroder _bL. _gLisa |
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| 701 | 1 |
_aHolmstrand _bH. _gHenry |
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| 701 | 1 |
_aHugelius _bG. _gGustaf |
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| 701 | 1 |
_aAndersson _bA. _gAugust |
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| 701 | 1 |
_aDudarev _bO. V. _cgeologist _cresearcher of Tomsk Polytechnic University, candidate of geological and mineralogical Sciences _f1955- _gOleg Viktorovich _2stltpush _3(RuTPU)RU\TPU\pers\35379 |
|
| 701 | 1 |
_aSemiletov _bI. P. _cgeographer _cProfessor of Tomsk Polytechnic University, doctor of geographical Sciences _f1955- _gIgor Petrovich _2stltpush _3(RuTPU)RU\TPU\pers\34220 |
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| 701 | 1 |
_aGustafsson _bO. _gOrjan |
|
| 712 | 0 | 2 |
_aНациональный исследовательский Томский политехнический университет (ТПУ) _bИнститут природных ресурсов (ИПР) _bКафедра геологии и разведки полезных ископаемых (ГРПИ) _bМеждународная научно-образовательная лаборатория изучения углерода арктических морей (МНОЛ ИУАМ) _h7398 _2stltpush _3(RuTPU)RU\TPU\col\20711 |
| 712 | 0 | 2 |
_aНациональный исследовательский Томский политехнический университет (ТПУ) _bИнститут природных ресурсов (ИПР) _bКафедра геологии и разведки полезных ископаемых (ГРПИ) _h2181 _2stltpush _3(RuTPU)RU\TPU\col\18660 |
| 801 | 2 |
_aRU _b63413507 _c20171226 _gRCR |
|
| 856 | 4 | _uhttps://doi.org/10.5194/tc-11-1879-2017 | |
| 942 | _cCF | ||