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Millennial- to centennial-scale Atlantic ITCZ swings during the penultimate deglaciation
IF 3.2 1区 地球科学
Quaternary Science Reviews Pub Date : 2024-11-30 DOI: 10.1016/j.quascirev.2024.109095
Marília C. Campos , Cristiano M. Chiessi , Rodrigo A. Nascimento , Laura Kraft , Svetlana Radionovskaya , Luke Skinner , Bruna B. Dias , Tainã M.L. Pinho , Marcus V.L. Kochhann , Stefano Crivellari , Thays D. Mineli , Vinícius R. Mendes , Paul A. Baker , Cleverson G. Silva , André O. Sawakuchi
{"title":"Millennial- to centennial-scale Atlantic ITCZ swings during the penultimate deglaciation","authors":"Marília C. Campos ,&nbsp;Cristiano M. Chiessi ,&nbsp;Rodrigo A. Nascimento ,&nbsp;Laura Kraft ,&nbsp;Svetlana Radionovskaya ,&nbsp;Luke Skinner ,&nbsp;Bruna B. Dias ,&nbsp;Tainã M.L. Pinho ,&nbsp;Marcus V.L. Kochhann ,&nbsp;Stefano Crivellari ,&nbsp;Thays D. Mineli ,&nbsp;Vinícius R. Mendes ,&nbsp;Paul A. Baker ,&nbsp;Cleverson G. Silva ,&nbsp;André O. Sawakuchi","doi":"10.1016/j.quascirev.2024.109095","DOIUrl":"10.1016/j.quascirev.2024.109095","url":null,"abstract":"<div><div>Growing concerns surround the future of the Atlantic Meridional Overturning Circulation (AMOC) and its impacts on tropical regions, particularly due to changes in the dynamics of the Intertropical Convergence Zone (ITCZ). Northeastern Brazil, a tropical region strongly influenced by ITCZ dynamics, exhibits significant biological and social vulnerability to climate change, making it timely to understand how its hydroclimate could be impacted by AMOC changes in the face of anthropogenic global warming. The penultimate deglaciation was marked by a millennial-scale weak AMOC event called Heinrich stadial 11 (HS11; ∼136-129 ka), providing an instructive target interval for improving our understanding of Northeastern Brazil hydroclimate responses to climate change. Here, we reconstruct paleoclimate changes during HS11 based on a multi-proxy approach applied to a high-resolution marine core from the western equatorial Atlantic. Our results suggest that HS11 was marked by a southward shift of the ITCZ, evidenced by paleoprecipitation records showing increased precipitation over Northeastern Brazil. These changes were concurrent with increased sea surface temperatures and reduced bottom water ventilation in the western equatorial Atlantic, interpreted as consequences of a weak AMOC. Importantly, we identified centennial-scale events within HS11, which are similar in nature but smaller in magnitude than HS11. These events align with North Atlantic climate changes, highlighting the crucial role that not only millennial- but also centennial-scale AMOC variability may play in low latitudes. Our findings raise concerns about the potential future impacts that an AMOC weakening may have on the hydroclimate of Northeastern Brazil and other tropical regions.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"348 ","pages":"Article 109095"},"PeriodicalIF":3.2,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142756583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
12,000 years away from the sea: Long-term circulation of Pacific shells in the Semiarid North of Chile (South America)
IF 3.2 1区 地球科学
Quaternary Science Reviews Pub Date : 2024-11-30 DOI: 10.1016/j.quascirev.2024.109112
Daniel Hernández Castillo , Andrés Troncoso , César Méndez , Daniel Pascual , Felipe Armstrong , Amalia Nuevo-Delaunay , Sebastián Grasset , Isidora Pérez , Francisca Vera , Manuela Delgado , Antonia Escudero , Mariela Pino , Pablo Larach
{"title":"12,000 years away from the sea: Long-term circulation of Pacific shells in the Semiarid North of Chile (South America)","authors":"Daniel Hernández Castillo ,&nbsp;Andrés Troncoso ,&nbsp;César Méndez ,&nbsp;Daniel Pascual ,&nbsp;Felipe Armstrong ,&nbsp;Amalia Nuevo-Delaunay ,&nbsp;Sebastián Grasset ,&nbsp;Isidora Pérez ,&nbsp;Francisca Vera ,&nbsp;Manuela Delgado ,&nbsp;Antonia Escudero ,&nbsp;Mariela Pino ,&nbsp;Pablo Larach","doi":"10.1016/j.quascirev.2024.109112","DOIUrl":"10.1016/j.quascirev.2024.109112","url":null,"abstract":"<div><div>Marine resources provide a baseline for understanding the sociohistorical trajectories of Andean societies using Pacific coastal environments. This study examines seashell distributions in northern Chile's semiarid region, revealing inland circulation patterns established over twelve thousand years. This included an extensive review of published information and new data assessed through GIS and least-cost paths. Sorting 950 specimens from 32 sites into 32 taxa, we identified consistent mobility patterns across time periods. In addition to the primary west-east trajectory from the sea to the interior, a secondary north-south inland vector was in use since the early Holocene. This study also revealed intensified shell transport during the middle Holocene, and a shift toward down-the-line exchange with reduced shell frequency at interior sites by the late Holocene, particularly in the Limarí Valley. Additionally, shell artifacts - ornaments and tools - were found more consistently in interior contexts. Together, these findings shed light on long-term human adaptation strategies in semiarid mountainous environments.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"348 ","pages":"Article 109112"},"PeriodicalIF":3.2,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142746980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Testate amoebae as paleohydrological indicators in the boreal and subarctic permafrost mires in the western part of the central Siberian Plateau
IF 3.2 1区 地球科学
Quaternary Science Reviews Pub Date : 2024-11-29 DOI: 10.1016/j.quascirev.2024.109108
Xiuyuan Gu , Andrey N. Tsyganov , Natalia G. Mazei , Kirill V. Babeshko , Victor A. Chernyshov , Elena Yu Novenko , Yuri A. Mazei
{"title":"Testate amoebae as paleohydrological indicators in the boreal and subarctic permafrost mires in the western part of the central Siberian Plateau","authors":"Xiuyuan Gu ,&nbsp;Andrey N. Tsyganov ,&nbsp;Natalia G. Mazei ,&nbsp;Kirill V. Babeshko ,&nbsp;Victor A. Chernyshov ,&nbsp;Elena Yu Novenko ,&nbsp;Yuri A. Mazei","doi":"10.1016/j.quascirev.2024.109108","DOIUrl":"10.1016/j.quascirev.2024.109108","url":null,"abstract":"<div><div>Carbon storage capacity of peat deposits in permafrost mires is highly sensitive to climate change which effects might be strongly mediated by mire moisture and permafrost. Thus, it is essential to develop appropriate indicator tools of hydrological regime which can be used for monitoring present and past conditions in these mires. We use testate amoebae to investigate their indicator value to water table depth (WTD) and substrate water content (SWC) and to develop transfer functions for quantitative reconstructions of these environmental characteristics in the permafrost mires on the Central Siberian Plateau. In many cased, direct measurement of WTD in permafrost mires are not possible due to the presence of ice, so that SWC can be used as an alternative characteristic. Overall, 330 surface samples were collected in five study regions together with the corresponding environmental measurements. We find that testate amoebae form diverse assemblages with the species structure strongly controlled by WTD and SWC. We developed two testate amoeba-based transfer functions to reconstruct these characteristics based on Modern Analogue Technique which were assessed using leave-one-out and bootstrap cross-validation. We find that both transfer functions have good predictive power (for WTD: RMSEP = 6.8–7.6 cm, R<sup>2</sup> = 0.54, for SWC: RMSEP = 2.0–2.3 %, R<sup>2</sup> = 0.74–0.76). The ecological preferences of the majority of testate amoebae were similar to those reported by the studies in lower-latitudes, although some hydrophilic taxa were observed in the drier end of the surface wetness gradient. These data represent an important source for improvement of quantitative reconstructions based on subfossil testate amoebae in permafrost mires.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"349 ","pages":"Article 109108"},"PeriodicalIF":3.2,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142745074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Radiocarbon constraints on North Indian deep ocean ventilation and deglacial carbon dioxide release
IF 3.2 1区 地球科学
Quaternary Science Reviews Pub Date : 2024-11-29 DOI: 10.1016/j.quascirev.2024.109116
Sui Wan , Yan Du , Lanlan Zhang , Liang Yi , Haowen Dang , Xiang Su , Jianguo Liu , Yiping Yang , Haoyin Wang , Rong Xiang
{"title":"Radiocarbon constraints on North Indian deep ocean ventilation and deglacial carbon dioxide release","authors":"Sui Wan ,&nbsp;Yan Du ,&nbsp;Lanlan Zhang ,&nbsp;Liang Yi ,&nbsp;Haowen Dang ,&nbsp;Xiang Su ,&nbsp;Jianguo Liu ,&nbsp;Yiping Yang ,&nbsp;Haoyin Wang ,&nbsp;Rong Xiang","doi":"10.1016/j.quascirev.2024.109116","DOIUrl":"10.1016/j.quascirev.2024.109116","url":null,"abstract":"<div><div>Late Quaternary Indian Ocean circulation evolution and its role in carbon cycle dynamics remain poorly constrained. Here, we reconstructed the radiocarbon ventilation history of the North Indian Ocean over the past 30 kyr BP, using core I106 at the Ninetyeast Ridge. The results show higher <sup>14</sup>C ventilation ages (Benthic-Atmospheric <sup>14</sup>C offsets reaching ∼3000 yrs in average) during the last glacial period than nowadays, indicating that deep-water ventilation of the glacial North Indian Ocean was reduced and Indian Deep Waters (IDWs) were part of the glacial aged carbon pool. They also present a rapid rise in ventilation of IDWs during late Heinrich Stadial 1 and the Younger Dryas event, consistent with existing stable isotope data and Nd isotope trends that imply an enhanced inflow of well-ventilated, low-CO<sub>2</sub> North Atlantic Deep Water (NADW) into the North Indian Ocean. The increase in ventilation of IDWs and NADW incursion would have caused a shift of the deep-ocean carbon pool with evidence of degassing from the North Indian Ocean. Together with <sup>14</sup>C ventilation records in the Indian sector of the Southern Ocean, it can be inferred that portions of deep Indian Ocean carbon pool were likely transferred via the IDW transport southward and subsequently released to the atmosphere from the Southern Ocean. These findings highlight that part of <sup>14</sup>C-depleted, CO<sub>2</sub>-rich IDWs contributed to the rapid rise in deglacial atmospheric CO<sub>2</sub> via a Southern Ocean link.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"349 ","pages":"Article 109116"},"PeriodicalIF":3.2,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142745155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Reply to: A commentary on Holocene relative sea-level histories of far-field islands in the mid-Pacific
IF 3.2 1区 地球科学
Quaternary Science Reviews Pub Date : 2024-11-28 DOI: 10.1016/j.quascirev.2024.109097
Fangyi Tan , Aron J. Meltzner , Tanghua Li , Jędrzej M. Majewski , Nicole S. Khan , Peter M. Chutcharavan , Benjamin P. Horton
{"title":"Reply to: A commentary on Holocene relative sea-level histories of far-field islands in the mid-Pacific","authors":"Fangyi Tan ,&nbsp;Aron J. Meltzner ,&nbsp;Tanghua Li ,&nbsp;Jędrzej M. Majewski ,&nbsp;Nicole S. Khan ,&nbsp;Peter M. Chutcharavan ,&nbsp;Benjamin P. Horton","doi":"10.1016/j.quascirev.2024.109097","DOIUrl":"10.1016/j.quascirev.2024.109097","url":null,"abstract":"","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"348 ","pages":"Article 109097"},"PeriodicalIF":3.2,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142746981","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Reconstructing the 800,000-year history of C4 herbs on the Chinese loess plateau using n-alkane carbon isotopes
IF 3.2 1区 地球科学
Quaternary Science Reviews Pub Date : 2024-11-28 DOI: 10.1016/j.quascirev.2024.109107
Pu Zhang , Weiguo Liu , Hong Yang
{"title":"Reconstructing the 800,000-year history of C4 herbs on the Chinese loess plateau using n-alkane carbon isotopes","authors":"Pu Zhang ,&nbsp;Weiguo Liu ,&nbsp;Hong Yang","doi":"10.1016/j.quascirev.2024.109107","DOIUrl":"10.1016/j.quascirev.2024.109107","url":null,"abstract":"<div><div>C<sub>4</sub> plants constitute a critical component in the modern ecosystem on the semi-arid Chinese Loess Plateau (CLP), and the changes in their abundances and distributions on geological time scales in response to climate factors such as temperature, precipitation, and atmospheric CO<sub>2</sub> are a subject of intense investigation and debate. Reliable reconstruction of the percentage of C<sub>4</sub> plants and a better understanding of its long-term variations in association with environmental and climatic changes are essential for interpretation of terrestrial ecosystem evolution. In this paper, we determine the carbon isotope and biomass characteristics of leaf wax on the CLP. We identify <em>Bothriochloa ischaemum</em> (L.) Keng as the dominant C<sub>4</sub> grass, which accounts for ∼90% of the total C<sub>4</sub> grass biomass and an average of 70% of the herbaceous community in the area. Using CO<sub>2</sub> and precipitation corrected carbon isotope compositions from leaf wax <em>n</em>-alkanes as a proxy, we reconstruct a continuous history of C<sub>4</sub> vegetation changes on the CLP during the Pleistocene. Our data indicate that a persistent grassland ecosystem existed on the tableland of the CLP, with C<sub>4</sub> plants accounting for up to 40–53% during interglacial phases and 24–40% during glacial phases. Our findings suggest that temperature and precipitation, influenced by the East Asian monsoon, are key factors affecting the abundance of C<sub>4</sub> vegetation in the region. The interactions with the monsoonal climate with warm-season precipitation in this grassland ecosystem throughout the past eight glacial cycles have important implications for the inhabitation of ancient humans in this region and underscore the challenges of vegetation restoration on the CLP under the projected warmer climate in the near future.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"348 ","pages":"Article 109107"},"PeriodicalIF":3.2,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142746978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Erosion-weathering partitioning from paired-mineral and weathering-corrected cosmogenic nuclide approaches
IF 3.2 1区 地球科学
Quaternary Science Reviews Pub Date : 2024-11-28 DOI: 10.1016/j.quascirev.2024.109114
Richard F. Ott , Florian Kober , Susan Ivy-Ochs , Dirk Scherler , Friedhelm von Blanckenburg , Marcus Christl , Christoph Vockenhuber
{"title":"Erosion-weathering partitioning from paired-mineral and weathering-corrected cosmogenic nuclide approaches","authors":"Richard F. Ott ,&nbsp;Florian Kober ,&nbsp;Susan Ivy-Ochs ,&nbsp;Dirk Scherler ,&nbsp;Friedhelm von Blanckenburg ,&nbsp;Marcus Christl ,&nbsp;Christoph Vockenhuber","doi":"10.1016/j.quascirev.2024.109114","DOIUrl":"10.1016/j.quascirev.2024.109114","url":null,"abstract":"<div><div>Chemical weathering can bias the interpretation of cosmogenic nuclide measurements for denudation rates, because soluble minerals have shorter regolith residence times than insoluble minerals. Paired-mineral measurements in target minerals with different solubility and corrections based on stream-water-derived weathering rates theoretically offer ways to mitigate these biases. Here we test these approaches in the carbonate landscapes of the Tabular Jura and Black Forest in Switzerland and Germany. We measured 26 <sup>36</sup>Cl and <sup>10</sup>Be concentrations for catchment-average denudation rates in calcite and quartz grains, respectively, and derive weathering rates from stream water chemistry along a denudation rate gradient. In catchments with homogeneous lithology, the <sup>10</sup>Be-<sup>36</sup>Cl paired-mineral approach predicts weathering rates that agree with stream-water derived measurements. In catchments with heterogeneous lithology, stream-water derived weathering rates were used to correct <sup>10</sup>Be and <sup>36</sup>Cl denudation rates. Weathering-corrected denudation rates increase by 100% for <sup>10</sup>Be and decrease by 5% for <sup>36</sup>Cl compared to uncorrected ones, illustrating that the magnitude of weathering correction depends on the abundance of target minerals.</div><div>We find denudation rates of 50–100 mm/ka on the low relief carbonate-dominated Bözberg plateau and intermediate relief incised carbonate valleys of the Randen, where weathering accounts for about 75% and 50% of the denudation, respectively. Along the Bözberg plateau flanks and the mid-relief Wutach tributaries denudation rates range between 100 and 200 mm/ka, with erosion and weathering each contributing about 50%. In the rapidly incising Wutach gorge, denudation rates are 300–500 mm/ka with less than 20% of weathering. These findings show that, similarly to crystalline rocks, the fraction of weathering in mixed sedimentary rocks inversely scales with denudation rate. Our study demonstrates that when sampling sites are chosen to ensure that target minerals are sourced from the same area, paired-mineral measurements and stream-water weathering corrections can be effectively used to determine denudation and weathering rates.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"348 ","pages":"Article 109114"},"PeriodicalIF":3.2,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142746979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Multiple late Holocene glacier advances on the sub-Antarctic Kerguelen (49°S) islands: Evidence from a 1200 yr sediment core from a glacial threshold basin 亚南极凯尔盖朗群岛(南纬 49 度)全新世晚期的多次冰川运动:来自冰川阈值盆地的 1200 年沉积岩芯的证据
IF 3.2 1区 地球科学
Quaternary Science Reviews Pub Date : 2024-11-27 DOI: 10.1016/j.quascirev.2024.109106
Jarle Børve Sleire , Jostein Bakke , Fabien Arnaud , Pierre Sabatier , Willem G.M. van der Bilt
{"title":"Multiple late Holocene glacier advances on the sub-Antarctic Kerguelen (49°S) islands: Evidence from a 1200 yr sediment core from a glacial threshold basin","authors":"Jarle Børve Sleire ,&nbsp;Jostein Bakke ,&nbsp;Fabien Arnaud ,&nbsp;Pierre Sabatier ,&nbsp;Willem G.M. van der Bilt","doi":"10.1016/j.quascirev.2024.109106","DOIUrl":"10.1016/j.quascirev.2024.109106","url":null,"abstract":"<div><div>Southern Ocean (SO) climate is rapidly changing because of global warming and regional climate feedback loops like shifts of the Southern Hemisphere (SH) westerly winds (SHW) and related Southern Annular Mode (SAM). Over the past decades, the former has been persistently positive, shifting the latter southwards: the ensuing changes in temperature and precipitation are linked to the rapid retreat of mid-latitude mountain glaciers. Beyond the short instrumental period, the long-term impact of this coupled SHW-SAM system on regional glaciers remains poorly constrained. To help close this gap, we reconstruct glacier advances from an outlet glacier on the sub-Antarctic Kerguelen (49°S, 69°E), an archipelago that is strategically located in an under-investigated region of the SHW core belt. Based on alternations between relatively organic and minerogenic mud detected using a multiproxy approach on a 1200-year-long sediment record from a glacial threshold basin, we document glacier advances between 1150 and 850, 820–620, 500–250 and 160–90 cal yr BP. Coincident glacier advances in adjacent regions like sub-Antarctic South Georgia and southern Patagonia, suggest that SO glaciers responded symmetrically to climate forcings during the past 1200 years. We attribute this synchronicity to shifting SAM-like conditions and associated temperature changes. We suggest that cold and negative SAM-like conditions, favourable for glacier growth on the Kerguelen and other SO land masses, dominated during much of this period. Furthermore, the findings presented here support the growing consensus for a two-phased regional expression of the Little Ice Age (LIA).</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"347 ","pages":"Article 109106"},"PeriodicalIF":3.2,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142722386","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
High- and low-latitude forcings on regional hydroclimate variability in Northeast China during Marine Isotope Stage 2 海洋同位素第二阶段高纬度和低纬度对中国东北地区水文气候变异的影响
IF 3.2 1区 地球科学
Quaternary Science Reviews Pub Date : 2024-11-25 DOI: 10.1016/j.quascirev.2024.109084
Niankang Chen , Ting Xu , Jiaxin Dou , Dongmei Jie , Guizai Gao , Zhuo Yang
{"title":"High- and low-latitude forcings on regional hydroclimate variability in Northeast China during Marine Isotope Stage 2","authors":"Niankang Chen ,&nbsp;Ting Xu ,&nbsp;Jiaxin Dou ,&nbsp;Dongmei Jie ,&nbsp;Guizai Gao ,&nbsp;Zhuo Yang","doi":"10.1016/j.quascirev.2024.109084","DOIUrl":"10.1016/j.quascirev.2024.109084","url":null,"abstract":"<div><div>The scarcity of well-dated, highly temporally resolved, paleoclimate records during the Marine Isotope Stage (MIS) 2 in Northeast (NE) China limits our understanding of the hydroclimate history in East Asian monsoon (EAM) region under different boundary conditions and the prediction of future hydroclimate changes. Meanwhile, it has not been comprehensively investigated how high- and low-latitude forcings, as crucial driving factors of global climate change, impact regional hydroclimate on various timescales during the MIS 2. This study applies phytolith-based principal component 1 scores, sum proportions of grain size-based end-members 2 and 3, and values of loss-on-ignition at 550 °C from the Dadong profile, to provide new evidence of hydroclimate changes during the MIS 2 in NE China. The results suggest that the regional humidity was low during the Last Glacial Maximum, and gradually increased during the subsequent Last Deglaciation. Additionally, the typical climate pattern of “warm-humid/cold-dry” in the EAM region was showed during a series of millennial oscillations. Combined with multiple records from NE China, it is observed that the orbital-scale hydroclimate changes during the MIS 2 were relatively consistent in different regions, and were mainly regulated by the ice sheet extents under the control of Northern Hemisphere high-latitude summer insolation. On the millennial scale, however, the hydroclimate changes suggested significant asynchrony or even anti-phase, indicating that the climate pattern may not always be similar to the typical EAM pattern. We propose that a series of sea-land-air interactions under the coupling of North Atlantic Deep Water activities in high latitudes and El Niño-Southern Oscillation in low latitudes, may be responsible for this complicated pattern. This study provides new insights into the climate evolution in NE china and its relationship with the high- and low-latitude forcings, which is beneficial for the explanation of mechanisms behind climate variability in this region.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"347 ","pages":"Article 109084"},"PeriodicalIF":3.2,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142721730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The isotopic composition of the French Illimani ice core in the Bolivian Andes supports the east-west South American precipitation dipole from the last deglaciation to the mid-Holocene 玻利维亚安第斯山脉法国伊利马尼冰芯的同位素组成支持从末次冰期到全新世中期南美洲东西向降水偶极现象
IF 3.2 1区 地球科学
Quaternary Science Reviews Pub Date : 2024-11-25 DOI: 10.1016/j.quascirev.2024.109098
Françoise Vimeux , Amaëlle Landais
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