Chemical Geology, Journal Year: 2024, Volume and Issue: 668, P. 122334 - 122334
Published: Aug. 17, 2024
Language: Английский
Chemical Geology, Journal Year: 2024, Volume and Issue: 668, P. 122334 - 122334
Published: Aug. 17, 2024
Language: Английский
Palaeogeography Palaeoclimatology Palaeoecology, Journal Year: 2024, Volume and Issue: 650, P. 112386 - 112386
Published: July 19, 2024
Language: Английский
Citations
5Marine Geology, Journal Year: 2024, Volume and Issue: 475, P. 107358 - 107358
Published: Sept. 1, 2024
Language: Английский
Citations
1Frontiers in Marine Science, Journal Year: 2024, Volume and Issue: 11
Published: Oct. 7, 2024
Organic carbon (OC) burial in the Antarctic marginal seas is essential for regulating global climate, particularly due to its association with ice shelf retreat. Here, we analyzed total OC (TOC), nitrogen (TN), radiocarbon isotope, n -alkanes and relative indicators surface core sediments from Ross Sea, West Antarctica. Our aim was investigate spatial historical changes sources, explore influencing factors implications retreat since last glacial maximum (LGM). results revealed distinct patterns of sources as indicated by -alkane sediments. In Western predominantly originated phytoplankton bacteria, evidenced their unimodal distribution, low preference index (CPI) short-chain (CPI L = 1.41 ± 0.30), terrestrial/aquatic ratio (TAR 0.22 0.14). Southwest were derived marine algae terrestrial bryophytes, bimodal low/high molecular-weight (L/H 0.62 0.21), CPI long-chain H 1.18 0.16), high TAR (1.26 0.66). contrast, Eastern Sea exhibited that a combination dust soils and/or leaf waxes mid-latitude higher plant, suggested both distributions, L/H (1.60 0.58) (2.04 0.28), medium (0.61 0.30). Geologically, during LGM (27.3 – 21.0 ka before present (BP)), there an increased supply (TOC/TN 13.63 1.29, distribution main peaks at C 17 / 19 27 ). From 8.2 BP, glaciers retreated temperatures rose, proportion significantly 9.09 1.82, 18 25 BP present, continued current position, contribution became dominant 8.18 0.51, peak , (0.41 0.32)). This research has significant understanding variations climatic impacts context accelerated glacier melting.
Language: Английский
Citations
1Journal of Asian Earth Sciences, Journal Year: 2024, Volume and Issue: 270, P. 106217 - 106217
Published: June 2, 2024
Language: Английский
Citations
1Palaeogeography Palaeoclimatology Palaeoecology, Journal Year: 2023, Volume and Issue: 629, P. 111783 - 111783
Published: Aug. 23, 2023
Language: Английский
Citations
3Frontiers in Earth Science, Journal Year: 2023, Volume and Issue: 11
Published: Aug. 17, 2023
Sedimentary organic matter (SOM) on continental slopes in marine regions can sensitively record climatic and environmental changes. In this study, total carbon content (TOC), nitrogen (TN), their stable isotope compositions (δ 13 C δ 15 N) for sediments of core G02 were investigated (at ∼24.2-year resolution) to reveal the temporal variations sources main controls distribution buried northwestern slope South China Sea over last ∼8600 years. Results a binary mixing model that ∼82.3 ± 3% SOM is derived from autochthonous sources. We suggest contents are governed by distinct factors. The more positive N values before Pulleniatina Minimum Event occurrence ascribed stronger subsurface water intrusion Kuroshio Current, which led enhanced denitrification turn counteracted effect with surface caused East Asian winter monsoon. show fluctuant decrease during ca. 8.6–3.0 cal kyr BP conspicuous increase 3.0–1.4 BP. These changes attributed productivity induced continuous weakening monsoon terrigenous input weakened Indian summer precipitation, respectively. Since 1.4 BP, human activities have become dominant factor controlling production carbon. results provide an important basis understanding source-sink processes factors influencing these low-latitude marginal seas.
Language: Английский
Citations
2Atmosphere, Journal Year: 2024, Volume and Issue: 15(8), P. 869 - 869
Published: July 23, 2024
Advances in reconstructing the East Asian monsoon have provided important insights into natural climate variability Asia during pre-instrumental period. However, there are still unresolved paleoclimate issues that necessitate use of geological proxy data to further our understanding past changes. This study focused on core B13, located muddy area North Yellow Sea (NYS), investigate evolutionary history over 1500 years and reconstruct records summer (EASM) warm current (YSWC). The mean grain size sediment ranged from 4.2 Φ 5.6 Φ, with sorting coefficient ranging 1.9 2.2, indicating poor sorting. C–M pattern showed a limited range values, M values being between 33 83 μm C 165 287 μm, suggesting uniform-suspension transport. L* index 40.41 44.12, while a* b* indexes 0.55 1.78 2.86 5.94, respectively. A stable relatively strong sedimentary environment is indicated through comprehensive analysis plot, triangular relationship sorting, changes grain-size color parameters. evolution NYS can be categorized three distinct stages. In this study, proxies for EASM YSWC were extracted using VPCA method diffuse spectral reflectance (DSR) data, reliability these has been confirmed comparison other validated proxies. results strength also exhibited stages, corresponding Dark Ages Cold Period (DACP), Medieval Warm (MWP), Little Ice Age (LIA), On centennial scale, correlation was predominantly negative. research validates reconstruction, contributes special area, provides new perspective how eliminate temporal errors verifying two systems.
Language: Английский
Citations
0Chemical Geology, Journal Year: 2024, Volume and Issue: 668, P. 122334 - 122334
Published: Aug. 17, 2024
Language: Английский
Citations
0