| 000 | 04519nlm1a2200385 4500 | ||
|---|---|---|---|
| 001 | 650783 | ||
| 005 | 20231030041004.0 | ||
| 035 | _a(RuTPU)RU\TPU\network\16032 | ||
| 035 | _aRU\TPU\network\14809 | ||
| 090 | _a650783 | ||
| 100 | _a20161020a2016 k y0engy50 ba | ||
| 101 | 0 |
_aeng _deng |
|
| 102 | _aUS | ||
| 135 | _adrcn ---uucaa | ||
| 181 | 0 | _ai | |
| 182 | 0 | _ab | |
| 200 | 1 |
_aMatrix association effects on hydrodynamic sorting and degradation of terrestrial organic matter during cross-shelf transport in the Laptev and East Siberian shelf seas _fT. Tesi [et al.] |
|
| 203 |
_aText _celectronic |
||
| 300 | _aTitle screen | ||
| 330 | _aThis study seeks an improved understanding of how matrix association affects the redistribution and degradation of terrigenous organic carbon (TerrOC) during cross-shelf transport in the Siberian margin. Sediments were collected at increasing distance from two river outlets (Lena and Kolyma Rivers) and one coastal region affected by erosion. Samples were fractionated according to density, size, and settling velocity. The chemical composition in each fraction was characterized using elemental analyses and terrigenous biomarkers. In addition, a dual-carbon-isotope mixing model (d13C and ?14C) was used to quantify the relative TerrOC contributions from active layer (Topsoil) and Pleistocene Ice Complex Deposits (ICD). Results indicate that physical properties of particles exert first-order control on the redistribution of different TerrOC pools. Because of its coarse nature, plant debris is hydraulically retained in the coastal region. With increasing distance from the coast, the OC is mainly associated with fine/ultrafine mineral particles. Furthermore, biomarkers indicate that the selective transport of fine-grained sediment results in mobilizing high-molecular weight (HMW) lipid-rich, diagenetically altered TerrOC while lignin-rich, less degraded TerrOC is retained near the coast. The loading (µg/m2) of lignin and HMW wax lipids on the fine/ultrafine fraction drastically decreases with increasing distance from the coast (98% and 90%, respectively), which indicates extensive degradation during cross-shelf transport. Topsoil-C degrades more readily (90?±?3.5%) compared to the ICD-C (60?±?11%) during transport. Altogether, our results indicate that TerrOC is highly reactive and its accelerated remobilization from thawing permafrost followed by cross-shelf transport will likely represent a positive feedback to climate warming. | ||
| 333 | _aРежим доступа: по договору с организацией-держателем ресурса | ||
| 461 | _tJournal of Geophysical Research: Biogeosciences | ||
| 463 |
_tVol. 121, iss. 3 _v[P. 731-752] _d2016 |
||
| 610 | 1 | _aэлектронный ресурс | |
| 610 | 1 | _aтруды учёных ТПУ | |
| 701 | 1 |
_aTesi _bT. _gTommaso |
|
| 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 |
|
| 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 |
_aAndersson _bA. _gAugust |
|
| 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) _bМеждународная научно-образовательная лаборатория изучения углерода арктических морей (МНОЛ ИУАМ) _h7398 _2stltpush _3(RuTPU)RU\TPU\col\20711 |
| 801 | 2 |
_aRU _b63413507 _c20170209 _gRCR |
|
| 856 | 4 | _uhttp://dx.doi.org/10.1002/2015JG003067 | |
| 942 | _cCF | ||