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The Latest Occurrence of Stephanorhinus hundsheimensis (Rhinocerotidae) in Europe: The Skeletons from the Cova del Rinoceront Site (Castelldefels, Barcelona) Stephanorhinus hundsheimensis(犀牛科)在欧洲的最近出现:来自 Cova del Rinoceront 遗址(巴塞罗那 Castelldefels)的骨骼
IF 2.3 Q2 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2023-12-14 DOI: 10.3390/quat6040060
David García-Fernández, E. Cerdeño, M. Sanz, Joan Daura
New rhino remains recovered from Cova del Rinoceront (Castelldefels, Barcelona) confirm the presence of Stephanorhinus hundsheimensis (Toula, 1902) at the site and the taxon’s persistence until the late Middle–early Upper Pleistocene in Europe, that is, its latest documented occurrence. The three individuals recovered from the site are compared with specimens of other Pleistocene species, including those of S. hemitoechus, S. kirchbergensis and Coelodonta antiquitatis, but their anatomical characteristics (a long skull, moderate occipital elevation, partial nasal septum, and slender zygomatic arch) do not coincide with the latter’s documented features. Certain similarities are found with the most frequently occurring rhinocerotid at that time in the Iberian Peninsula, S. hemitoechus, but the cranial features of the latter differ. The anatomical characteristics of the Cova del Rinoceront individuals coincide most closely with those of S. hundsheimensis (i.e., a high occipital face, with rounded proximolateral angles and oblique lateral borders, as well as the frontoparietal angle, and facial development). Despite the marked overlaps in the general measurements of S. hundsheimensis and S. hemitoechus, many (cranial and postcranial) dimensions of the Cova del Rinoceront individuals coincide more closely with those of the former, although some bone proportions are more similar to those of the latter specimens. Therefore, S. kirchbergensis and C. antiquitatis can be discarded as they tend to be larger, more robust species.
从 Cova del Rinoceront(巴塞罗那 Castelldefels)发掘的新犀牛遗骸证实了 Stephanorhinus hundsheimensis(Toula,1902 年)在该遗址的存在,以及该分类群在欧洲一直持续到中更新世晚期-上更新世早期,即其有文献记载的最近出现时间。从该遗址发现的三个个体与其他更新世物种的标本进行了比较,包括 S. hemitoechus、S. kirchbergensis 和 Coelodonta antiquitatis 的标本,但它们的解剖特征(长头骨、适度枕骨隆起、部分鼻中隔和细长的颧弓)与后者的文献特征并不一致。它与当时伊比利亚半岛最常见的犀牛科动物 S. hemitoechus 有某些相似之处,但后者的头骨特征有所不同。Cova del Rinoceront个体的解剖特征与S. hundsheimensis最为吻合(即枕面高,近外侧角圆,侧缘斜,前顶角和面部发育)。尽管 S. hundsheimensis 和 S. hemitoechus 的一般测量值有明显的重叠,但 Cova del Rinoceront 个体的许多(颅骨和颅后)尺寸与前者更为接近,尽管某些骨骼比例与后者的标本更为相似。因此,可以放弃 S. kirchbergensis 和 C. antiquitatis,因为它们往往是体型更大、更健壮的物种。
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引用次数: 0
Quaternary Mammals from Central-Western Argentina in the Stratigraphic Context of Southern South America 南美洲地层背景下的阿根廷中西部第四纪哺乳动物
IF 2.3 Q2 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2023-12-04 DOI: 10.3390/quat6040059
E. Cerdeño, Natalia P. Lucero, J. Chiesa
This is an updated contribution to the Quaternary geology and paleontology from central-western Argentina, focused on San Luis Province. It is mostly based on unpublished data; only some fossils had previously been briefly mentioned in broader faunal contexts. The fossil-bearing sediments correspond to eolian and alluvial environments of moderate energy, dominated by sands and sandy silts. They overlie high-energy fluvial cycles and underlie edaphic horizons. They have a wide distribution, and several radiocarbon dates allow their regional correlation. Stratigraphic sequences with the precise origin of fossils allow for the improvement of lithostratigraphic and faunal correlations with the Pampean Region (central and east Argentina; La Pampa and Buenos Aires provinces), where Pleistocene assemblages are better known, but also with central-western (Cuyo Region), northwestern, and northeastern Argentina. Faunal remains correspond to large mammals, represented by xenarthrans (Cingulata and Tardigrada), macraucheniids (Litopterna), gomphotheres (Proboscidea), and equids (Perissodactyla), a typical Pleistocene mixture of native (xenarthrans and litopterns) and immigrant mammals.
这是对阿根廷中西部第四纪地质学和古生物学的最新贡献,主要集中在圣路易斯省。它主要基于未发表的数据;以前只有一些化石在更广泛的动物背景中被简要地提到过。含化石沉积物属于中等能量的风成和冲积环境,以砂质和砂质粉砂为主。它们覆盖在高能量的河流旋回之上,在地平面之下。它们分布广泛,几个放射性碳测年证实了它们的区域相关性。具有精确化石起源的地层层序可以改善与潘潘地区(阿根廷中部和东部;La Pampa和Buenos Aires省),在那里更新世的组合更为人所知,但也与阿根廷中西部(Cuyo地区),西北部和东北部。动物化石对应的是大型哺乳动物,代表有异爪目(钩爪目和熊爪目)、巨爪目(狐目目)、齿形目(喙目目)和马科(异爪目),这是一个典型的更新世本土(异爪目和狐目)和移民哺乳动物的混合体。
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引用次数: 0
The Fox from Bajiazui (Qingyang, Central China) and an Update on Early Pleistocene Foxes from China 来自巴家嘴(中国中部庆阳)的狐狸和中国早更新世狐狸的最新情况
IF 2.3 Q2 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2023-11-20 DOI: 10.3390/quat6040057
Saverio Bartolini-Lucenti, Qigao Jiangzuo, Hao Jiang, Zhaoyu Li, Kun Xie, J. Madurell-Malapeira
(1) Background: despite the fact that nowadays the genus Vulpes Frisch, 1775, is the most diverse among extant Canidae, its fossil record is utterly scarce, especially in the Asian Pliocene. The sparse nature of this record further complicates the reconstruction of the evolutionary scenario to fit these taxa with extant species. The situation seems to change slightly in the Early Pleistocene when two species are recorded: Vulpes alopecoides (Del Campana, 1913) in Europe and Vulpes chikushanensis, Young, 1930, in Asian localities. Unlike the former, which has an extensive record, the remains of the Chinese V. chikushanensis are sporadic and the validity of the taxon has also been questioned. (2) Methods: the study of the specimens from the Early Pleistocene site of Bajiazui (1.8–1.2 Ma, Qingyang, Gansu) in comparison to an extensive sample of Vulpes spp. The Pliocene–Early Pleistocene is relevant for the delimitation of fossil foxes variability; (3) Results: morphologically and morphometrically, the specimens of Bajiazui fit with the specimens of V. chikushanensis from other Chinese localities of the Early Pleistocene, e.g., Longdan (Gansu) and Huiyu (Fangshang), highlighting some difference with the latest Early Pleistocene forms of Jigushan fox; (4) Conclusions: the revision of the Asian fossil record of Vulpes is crucial in our attempt to understand and reconstruct the evolution of carnivoran guild during the late Early Pleistocene (1.8–0.8 Ma). The fox remains from Bajiazui, although fragmentary, add a valuable piece to our knowledge of V. chikushanensis, a species possibly strongly related to the extant Vulpes corsac (Linnaeus, 1768).
(1) 背景:尽管弗里施(Frisch,1775)狐属(Vulpes Frisch,1775)是现存犬科中种类最多的,但其化石记录却非常稀少,尤其是在亚洲上新世。这种记录的稀缺性使重建这些类群与现存物种的进化情景变得更加复杂。早更新世的情况似乎略有改变,当时记录了两个物种:欧洲的 Vulpes alopecoides(Del Campana,1913 年)和亚洲的 Vulpes chikushanensis(Young,1930 年)。与前者的广泛记录不同,中国的筑山狐(Vulpes chikushanensis)的遗存很零散,该分类群的有效性也受到质疑。(2)研究方法:将甘肃庆阳八家嘴早更新世遗址(1.8-1.2Ma)的标本与大量的Vulpes属动物标本进行对比研究,以确定Vulpes属动物在中国的分布情况。(3) 结果:从形态学和形态计量学上看,巴家嘴的标本与中国其他早更新世地点的狐狸标本相吻合,如甘肃陇丹和甘肃庆阳的狐狸标本;从形态学和形态计量学上看,巴家嘴的狐狸标本与中国其他早更新世地点的狐狸标本相吻合,如甘肃庆阳的狐狸标本、(4)结论:对亚洲狐化石记录的修订对于我们理解和重建早更新世晚期(1.8-0.8Ma)食肉动物的演化过程至关重要。巴家嘴的狐狸化石虽然残缺不全,但为我们了解筑山狐(V. chikushanensis)增添了宝贵的资料,筑山狐可能与现存的科萨克狐(Vulpes corsac)(林奈,1768 年)有密切的亲缘关系。
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引用次数: 0
Ecological Constraints and Drivers for Human Dispersals and Adaptations in the Late Pleistocene and Early Holocene Environments of the East Siberian Arctic 东西伯利亚北极晚更新世和全新世早期环境中人类迁移和适应的生态约束和驱动因素
Q2 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2023-11-06 DOI: 10.3390/quat6040056
Vladimir V. Pitulko, Elena Y. Pavlova
Starting roughly 50,000 years ago, the Arctic region of East Siberia remained continuously populated by groups of anatomically modern humans including the most uncomfortable episodes in the development of the late Quaternary environment; for some of them, human presence in the area became ephemeral. At present, archaeological fossil records allow for distinguishing three main stages in human occupation of the area: Early (~50 to ~29 ka, MIS 3), middle (~29 to ~11.7 ka, MIS 2), and late (from 11.7 to ~8 ka). For most of the time, they the populated open landscapes of the Mammoth Steppe, which declined at the onset of the Holocene. Human settlement of the Arctic was driven by various abiotic and biotic factors and thus archaeologically visible cardinal cultural and technological changes correspond to the most important paleoclimatic and habitat changes in the late Pleistocene and early Holocene. Successful peopling of the Arctic was largely facilitated by the adoption of critically important innovations such as sewing technology based on the use of the eyed bone needle and the manufacture of long shafts and pointed implements made of mammoth tusks. Mammoth exploitation is seen in mass accumulations of mammoths formed by hunting. An obvious connection between archaeological materials and such accumulations is observed in the archaeological record. In the lithic technology, the early stage is presented by archaic-looking flake industries. Starting the LGM, the wedge-core based-microblade technology known as the Beringian microblade tradition spread widely following the shrinkage of the mammoth range. At the late stage, starting at the Holocene boundary, microprismatic blade technology occurs. In all stages, the complex social behavior of the ancient Arctic settlers is revealed. The long-distance transport of products, knowledge, and genes occurs due to the introduction of the land transportation system. Initial human settlement of this region is associated with carriers of the West Eurasian genome who became replaced by the population with East Asian ancestry constantly moving North under the pressure of climate change.
从大约5万年前开始,东西伯利亚的北极地区一直居住着解剖学上的现代人群体,包括晚第四纪环境发展中最不舒服的时期;对其中一些人来说,人类在该地区的存在变得短暂。目前,考古化石记录将人类在该地区的活动划分为三个主要阶段:早期(~50 ~ ~29 ka, MIS 3)、中期(~29 ~ ~11.7 ka, MIS 2)和晚期(~ 11.7 ~ ~8 ka)。在大多数时间里,它们居住在猛犸草原的开阔景观中,而猛犸草原在全新世开始时有所减少。北极的人类定居受到多种非生物和生物因素的驱动,因此考古上可见的主要文化和技术变化与晚更新世和全新世早期最重要的古气候和栖息地变化相对应。人类在北极的成功居住很大程度上得益于采用了一些至关重要的创新,比如基于眼骨针的缝纫技术,以及用猛犸象牙制造长轴和尖头工具。猛犸象的开发是在狩猎形成的大量猛犸象聚集中看到的。在考古记录中观察到考古材料和这种堆积之间的明显联系。在岩屑技术中,早期的阶段是仿古的片状工业。从LGM开始,基于楔形核心的微刀片技术被称为白令陆桥微刀片传统,随着巨大范围的缩小而广泛传播。后期,从全新世边界开始,出现了微棱柱形叶片技术。在各个阶段,揭示了古代北极定居者复杂的社会行为。由于陆地运输系统的引入,产品、知识和基因的远距离运输得以实现。该地区最初的人类定居与西欧亚基因组的携带者有关,这些携带者在气候变化的压力下不断向北移动,被具有东亚血统的人群所取代。
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引用次数: 0
The River Valleys of the Greek Colony of Selinunte: Results of an Offshore Investigation 希腊塞利努特殖民地的河谷:一项近海调查的结果
Q2 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2023-10-19 DOI: 10.3390/quat6040055
Emanuele Lodolo, Luca Baradello, László Szentpeteri, Michele Deponte, Emiliano Gordini, Dario Civile
The ancient Greek colony of Selinunte, with its acropolis on a promontory on the south-western coast of Sicily, is flanked by two valleys where two modest rivers flow today: the Modione to the west and the Cottone to the east. Archaeological reconstructions, historical documents from various sources, and recent remote sensing surveys indicate two important bays corresponding to the ancient mouths of these two rivers, now completely covered by a thick layer of sediments. It is believed that the ports of the colony were located in these bays, although the remains of these ports are still sparse and contradictory. Here we present a multibeam bathymetric map of part of the marine area immediately off Selinunte and a series of high-resolution seismic profiles acquired parallel to the coastline. They show the geometries and stratigraphic context of the two buried river valleys offshore, from which information about the palaeoenvironmental setting and evolution of the landscape can be derived and which may be used in adequately guiding future archaeological excavation programs.
古希腊殖民地塞利努特(Selinunte)及其卫城位于西西里岛西南海岸的一个海角上,两侧是两条山谷,今天两条温和的河流在这里流淌:莫迪奥内河(Modione)向西流淌,科通河(Cottone)向东流淌。考古重建、各种来源的历史文献和最近的遥感调查表明,两个重要的海湾与这两条河流的古代河口相对应,现在完全被一层厚厚的沉积物覆盖。人们相信殖民地的港口位于这些海湾,尽管这些港口的遗迹仍然稀少且相互矛盾。在这里,我们展示了Selinunte附近部分海洋区域的多波束测深图,以及平行于海岸线获得的一系列高分辨率地震剖面。它们显示了两个近海埋藏河谷的几何形状和地层背景,从中可以获得有关古环境背景和景观演变的信息,并可能用于充分指导未来的考古发掘计划。
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引用次数: 0
The Long-Term Deep Loessal Sediments of Northeast China: Loess or Loessal Paleosols? 东北长期黄土深层沉积物:黄土还是黄土古土壤?
Q2 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2023-10-07 DOI: 10.3390/quat6040053
Zhong-Xiu Sun, Nai-Wen Zhang, Ying-Ying Jiang, Qiu-Bing Wang, Gan-Lin Zhang
Previous research assumed deep buried loess as the initial composition of the overlying paleosol and failed to address the long-term continuous pedogenic weathering history in the deep loess-paleosol sequence, which was attributed to little understanding on the difference between loess and paleosol in the long-term deep loess-paleosol sequence. To distinguish between the loess and paleosol, in the long-term deep loess-paleosol sequence in northeast China, the morphology, dust deposition fluxes, geochemical characteristics, magnetic susceptibility, and grain size distributions were investigated. Results showed that the loess layers buried at depth could be differentiated from the paleosol by their poor pedogenic development. The presence of coarser grains in the loess as well as lesser amounts of clay and Fe–Mn coatings compared to paleosol indicated weaker weathering of the loess. Also, optical iron clay films deposited on the surface of the skeleton particles were less visible in the loesses than in the paleosols. From the loess evolution perspective, the pedogenic formation process of the newly formed loess soils should be considered as important as that of the reddish paleosol layer based on criteria of formation time, depth within profile, and morphological characteristics. The formation of the reddish or yellowish paleosol layer was constrained by pedogenic environments associated with climatic change and by the relative rates of deposition and pedogenesis. The terms “loessal paleosol” and “loessal paleosol sequence” are suggested to aid in systematically and consistently addressing the long-term pedogenic weathering evolution recorded in the complex formation of deep loess and paleosol sequences in pedology research. The long-term deep loessal sediments of Northeast China are loessal paleosols, which cannot be simply used as a reference for the overlying paleosol and be deducted from pedogenesis consideration.
以往的研究假设深埋黄土为上覆古土壤的初始成分,未能解决深埋黄土-古土壤序列中长期连续的成土风化历史,对长期深埋黄土-古土壤序列中黄土与古土壤的差异认识不足。为了区分黄土和古土壤,研究了东北地区长期深层黄土-古土壤序列的形态、沙尘通量、地球化学特征、磁化率和粒度分布。结果表明,深埋黄土与古土壤的成土发育程度较差。与古土壤相比,黄土颗粒较粗,粘土和铁锰包层较少,表明黄土风化较弱。此外,沉积在骨骼颗粒表面的光学铁粘土膜在黄土中比在古土壤中更不明显。从黄土演化的角度看,从新形成的黄土土的成土过程应与红色古土壤层的成土过程同等重要,以形成时间、剖面深度和形态特征为标准。红色或淡黄色古土壤层的形成受与气候变化有关的成土环境以及沉积和成土的相对速率的制约。提出了“黄土古土壤”和“黄土古土壤序列”的概念,以便在土壤学研究中系统、一致地描述深层黄土和古土壤序列复杂地层中所记录的长期成土风化演化过程。东北地区长期深层黄土沉积物是黄土古土壤,不能简单地作为上覆古土壤的参考而不考虑成土作用。
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引用次数: 0
Foxes in Retrospect—Unraveling Human-Fox Relationships through Fox Tooth Ornaments in the Swabian Jura 回顾中的狐狸——通过斯瓦比亚汝拉狐狸牙齿饰品揭示人类与狐狸的关系
Q2 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2023-09-21 DOI: 10.3390/quat6030050
Flavia Venditti, Madison J. McCartin, Melanie-Larisa Ostermann, Nicholas J. Conard, Sibylle Wolf
Personal ornaments play an important role in our understanding of human cultural and behavioral change during the Upper Paleolithic, providing insights into intangible aspects of human cultural behavior. Some ornament forms are better studied than others, and fox tooth ornaments, despite their frequent occurrence and broad spatiotemporal span, are relatively under-addressed. Here we present the first comprehensive study of 40 perforated fox teeth recovered from four cave sites in southwestern Germany. This region’s rich record of symbolic representations, as well as evidence of long-standing human–fox relationships, make the Swabian Jura an ideal case study for investigations of fox tooth ornaments. By applying a holistic approach, including geometric morphometrics and traceology coupled with experimental archaeology, we show that fox teeth were mostly perforated by bifacial scraping and grooving and were worn as ornaments. We discuss the role of foxes within human socio-symbolic and paleoenvironmental systems during the Upper Paleolithic of the Swabian Jura, and we contextualize our results within the broader context of sites across Europe during the Upper Paleolithic. The data we provide are in line with general trends observed across the continent and offer insight into the role of foxes during the Upper Paleolithic, especially regarding human subsistence, cultural expression, and ornament production.
个人饰品在我们理解旧石器时代晚期人类文化和行为变化方面发挥着重要作用,为人类文化行为的无形方面提供了见解。一些装饰形式的研究相对较好,而狐牙装饰虽然出现频率高、时空跨度广,但研究相对较少。在这里,我们提出了从德国西南部四个洞穴遗址中恢复的40个穿孔狐狸牙齿的第一个综合研究。该地区丰富的象征记录,以及人类与狐狸长期关系的证据,使斯瓦本汝拉成为研究狐狸牙齿装饰品的理想案例。通过几何形态计量学和痕迹学结合实验考古学的整体方法,我们发现狐狸的牙齿主要是通过双面刮擦和沟槽穿孔,并作为装饰品佩戴。我们讨论了在斯瓦本汝拉旧石器时代晚期,狐狸在人类社会符号和古环境系统中的作用,并将我们的结果置于旧石器时代晚期欧洲各地遗址的更广泛背景下。我们提供的数据与整个大陆观察到的总体趋势一致,并提供了对旧石器时代晚期狐狸的作用的深入了解,特别是在人类生存,文化表达和装饰品生产方面。
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引用次数: 0
Diatom Assemblages from the Daginsky Mud Volcano Sediments (Eastern Sakhalin) and Their Implication 东库页岛达吉斯基泥火山沉积物中的硅藻组合及其意义
IF 2.3 Q2 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2023-09-05 DOI: 10.3390/quat6030049
I. Tsoy, A. V. Sorochinskaya
Diatom assemblages in mud volcanoes are quite rare and are poorly studied. The finding of a rich diatom flora in the sediments of the Daginsky Mud Volcano (DMV), located in the tidal zone of the Nyisky Bay of the Sea of Okhotsk, is of interest to study the conditions for the formation of host sediments in the zone of influence of various extreme factors, such as outflows of gases and water–mud mass, thermal springs, and tides. For this purpose, the taxonomical composition of diatom assemblages and concentration of diatoms in DMV sediments were studied. A comparison was made with the diatoms of geothermal springs of the Russian Far East associated with volcanic activity, and the stratigraphic occurrence of the found extinct diatoms was analyzed, which is important for determining their source and the age of the mud volcano roots. Diatom assemblages from DMV sediments are mainly characterized by the predominance of Metascolioneis tumida, Paralia sulcata, Odontella aurita, Pinnunavis yarrensis, Petroneis marina, Cocconeis scutellum, and Navicula digitoradiata. They consist of diatoms of different biotopes and extinct species. The diversity and abundance of brackish water and marine species indicates the predominant influence of sea waters on the formation of DMV sediments. The diverse freshwater species were mainly introduced into sediments with river runoff, but it is likely that some of these, such as the cosmopolitan alkaliphilic species, are inhabitants of geothermal springs. The presence of extinct species from the underlying Neogene sediments from where they were carried with gas–water–mud masses is the most typical for diatom assemblages of the DMV.
泥火山中的硅藻组合非常罕见,研究也很少。位于鄂霍次克海尼伊斯基湾潮汐带的达吉斯基泥火山(Daginsky Mud Volcano, DMV)沉积物中发现了丰富的硅藻植物群,这对于研究在各种极端因素(如气体和水泥块的流出、温泉和潮汐)的影响下形成宿主沉积物的条件具有重要意义。为此,对DMV沉积物中硅藻组合的分类组成和硅藻浓度进行了研究。并与俄罗斯远东地区与火山活动有关的地热泉中的硅藻进行了对比,分析了已灭绝硅藻的地层产状,这对确定泥火山根系的来源和年龄具有重要意义。DMV沉积物中的硅藻组合以Metascolioneis tumida、Paralia sulcata、Odontella aurita、Pinnunavis yarrensis、Petroneis marina、Cocconeis scutellum和Navicula digitoradiata为主。它们由不同生物群落和灭绝物种的硅藻组成。咸淡水和海洋物种的多样性和丰度表明海水对DMV沉积物形成的主要影响。不同的淡水物种主要是随河流径流进入沉积物,但其中一些物种,如世界性的嗜碱物种,很可能是地热泉的居民。新近纪沉积物中已灭绝物种的存在是DMV硅藻组合最典型的特征,这些物种与气-水-泥团一起被携带。
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引用次数: 0
The Processes of Aggradation and Incision in the Channels in the Terek River Basin, the North Caucasus: The Hydrological Fluvial Archives of the Recent Past 北高加索特列克河流域河道的淤积和切割过程:近代水文河流档案
IF 2.3 Q2 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2023-09-01 DOI: 10.3390/quat6030047
A. Sidorchuk
The rates of incision and aggradation in the channels in the Terek River basin (North Caucasus) for the last 50–85 years were estimated at 18 gauging stations. The stage–discharge method (annual low water stages at the same discharges) was applied. The stability of the Terek River channel was recorded on the tectonically subsiding Tersko–Kuma Lowland. On the subsiding Kabardian Plain, channel aggradation up to 14 mm a−1 was registered. The rapid (~32 mm a−1) incision of the Terek River occurs within the antecedent valley of the rising Sunzha Ridge, causing regressive erosion and incision (~25 mm a−1) of rivers on the Ossetian Plain, despite its tectonic subsiding. The rivers in the uplifting mountains of the North Caucasus transport the sediments delivered from slopes as climatically controlled debris flows. Aggradation and incision here alternate without a visible overall trend. The rates of modern channel bed deformations are 10 to 100 times higher than the mean rates of tectonic movements. The main effect of tectonics is the changes in river channel slopes, which cause changes in the bed load transport budget and channel bed deformation. Human-made constructions induce rapid deformations in the channels but have a local effect.
用18个测量站估计了特列克河流域(北高加索)河道在过去50-85年间的切割和淤积率。采用分段放水法(相同放水量的年低水位放水法)。捷列克河河道的稳定性记录在构造沉降的捷尔斯科-库马低地上。在下沉的卡第亚平原上,河道淤积达14mm a−1。特列克河的快速切割(~32 mm a−1)发生在上升的孙扎岭的前谷内,尽管奥塞梯平原的构造沉降,但造成了河流的后退侵蚀和切割(~25 mm a−1)。北高加索隆起的山脉中的河流将斜坡上的沉积物作为气候控制的泥石流运输。此处脓肿和切口交替出现,总体趋势不明显。现代河床的变形速率比构造运动的平均速率高10 ~ 100倍。构造作用的主要影响是河道坡度的变化,从而引起河床输运收支和河床变形的变化。人为建筑引起河道迅速变形,但只产生局部影响。
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引用次数: 0
Air Temperature Change at the End of the Late Holocene and in the Anthropocene in the Middle Volga Region, European Russia 俄罗斯欧洲部分伏尔加中部地区晚全新世末和人类世的气温变化
IF 2.3 Q2 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2023-09-01 DOI: 10.3390/quat6030048
Y. Perevedentsev, K. Shantalinsky, A. Gusarov, N. Mirsaeva, T. Aukhadeev, Alexander A. Nikolaev
The temporal variability of air temperature in the Middle Volga region from 1828 to 2021 is considered according to instrumental observations at the oldest meteorological station in the east of the East European Plain (Kazan University) and throughout the Asian part of Russia against the background of long-term climate fluctuations in the Northern Hemisphere of Earth. A general trend toward an increase in air temperature was revealed. It was found that climate change in Kazan was consistent with the climatic processes that occurred in the Middle Volga region as a whole. The greatest warming for the entire observation period was observed in the winter and spring seasons of the year. In December, warming occurred at a maximum rate of 0.28 °C/10 years. At the same time, the most intense warming process was observed from 1991 to 2021. The analysis of low-frequency fluctuations in the series of monthly average air temperatures made it possible to identify different periods of change, both in type (direction) and intensity. It is shown that in the Middle Volga region, positive anomalies of air temperature have occurred more often than negative ones in recent decades. Statistical data processing was also carried out for 30-year periods, starting from the first period, i.e., 1841–1870. This made it possible to reveal long-term changes in air temperature. Comparisons of climatic parameters in two periods, i.e., 1828–1945 and 1946–2021, allowed us to reliably detect the climatic beginning of the increasingly identifiable Anthropocene epoch (since 1946), characterized by a sharp increase in air temperature, increased interannual variability of the air temperature regime, and a significant increase (by about three times) in the rate of warming in the Middle Volga region. A correlation was made between atmospheric circulation indices and air temperature fluctuations in Kazan over different periods. The closest relationship was found for the 1990–2020 period. It is shown that the contribution of global factors to air temperature variability in the Middle Volga region during the Anthropocene reached 37% in winter and 32% in summer; in annual terms, this contribution amounted to 54%.
在地球北半球长期气候波动的背景下,根据东欧平原东部最古老的气象站(喀山大学)和俄罗斯整个亚洲地区的仪器观测,考虑了1828年至2021年伏尔加中部地区气温的时间变化。气温普遍呈上升趋势。结果表明,喀山地区的气候变化与伏尔加中部地区的气候过程是一致的。整个观测期的最大变暖发生在一年中的冬季和春季。12月,气候变暖的最大速度为0.28°C/10年。与此同时,1991年至2021年出现了最强烈的变暖过程。通过分析月平均气温系列中的低频波动,可以确定不同的变化时期,包括类型(方向)和强度。结果表明,近几十年来,伏尔加中部地区气温正异常的发生率高于负异常。从第一个时期,即1841年至1870年,也对30年的时期进行了统计数据处理。这使得揭示空气温度的长期变化成为可能。对1828-1945年和1946-2021年这两个时期的气候参数进行比较,使我们能够可靠地探测到越来越可识别的人类世时代(自1946年以来)的气候开始,其特征是气温急剧上升,气温状况的年际变化增加,以及伏尔加中部地区的升温速度显著增加(大约三倍)。对喀山不同时期的大气环流指数和气温波动进行了相关分析。1990年至2020年期间发现了最密切的关系。结果表明,人类世期间,全球因素对伏尔加中部地区气温变化的贡献率在冬季达到37%,在夏季达到32%;按年度计算,这一贡献达54%。
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