Aeolian Research最新文献_第2页

Feature contributions and predictive modeling of aeolian sand transport detection in the atmospheric surface layer 大气表层风沙输运探测的特征贡献与预测模型

IF 3.4 3区地球科学 Q2 GEOGRAPHY, PHYSICAL

Aeolian Research

Pub Date : 2026-03-01 Epub Date: 2026-02-18 DOI: 10.1016/j.aeolia.2026.101037

Sai Li , Wenyong Ma , Junxiang Ma , Zhibo Zhang , Kang Yang

Predicting aeolian sand transport in the atmospheric surface layer (ASL) is difficult because turbulence-driven intermittency produces hysteresis and burst-like saltation. This study develops an interpretable machine learning framework for aeolian transport event detection using high-frequency wind and saltation flux measurements. The analysis compares raw velocity components, first-order statistics, fluctuation velocities, and second-moment derivatives including friction velocity (u_∗) and turbulence intensity (TI). Model performance was benchmarked across averaging windows and heights and interpreted using SHapley Additive exPlanations (SHAP) to quantify the contribution of individual features to model predictions. Streamwise velocity emerged as the strongest predictor, with importance peaking near the surface and reemerging aloft where reduced dissipation provided cleaner signals. Rolling-window aggregates of first-order statistics achieved superior accuracy to raw inputs and the Time Frequency Equivalence Method, with optimal performance at a 30 s window that matched the velocity decorrelation timescale. Fluctuation velocities alone yielded poor results but enhanced predictive skill when combined with first-order statistics, with sweeps and outward interactions dominating saltation initiation. Models based on u_∗ and TI achieved comparable accuracy but required longer windows (300 s), and SHAP analysis indicated that features derived from near-surface winds, including u_∗ and TI as well as fluctuation components, ranked highest in importance. Overall, the framework improves predictive accuracy beyond traditional methods, preserves physical interpretability, and offers valuable insights for feature selection, measurement strategies, and atmospheric monitoring of aeolian processes.

由于湍流驱动的间断性会产生滞后性和突发性跃变，对大气表层风沙输运的预测是困难的。本研究开发了一个可解释的机器学习框架，用于利用高频风和跃变通量测量来检测风成输运事件。该分析比较了原始速度分量、一阶统计量、波动速度和包括摩擦速度（u *）和湍流强度（TI）在内的二阶导数。模型性能通过平均窗口和高度进行基准测试，并使用SHapley加性解释（SHAP）进行解释，以量化个体特征对模型预测的贡献。流向速度是最强的预测因子，其重要性在地表附近达到峰值，在高空再次出现，在高空耗散减少提供了更清晰的信号。一阶统计量的滚动窗口聚合比原始输入和时间频率等效方法具有更高的精度，在与速度去相关时间尺度匹配的30秒窗口具有最佳性能。波动速度单独产生的结果很差，但当与一阶统计相结合时，预测能力增强，扫描和向外相互作用主导了跃变的开始。基于u∗和TI的模型达到了相当的精度，但需要更长的窗口（300秒），并且SHAP分析表明，来自近地面风的特征，包括u∗和TI以及波动分量，是最重要的。总体而言，该框架提高了传统方法的预测精度，保留了物理可解释性，并为特征选择、测量策略和大气风成过程监测提供了有价值的见解。

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引用次数: 0

Effect of relative humidity on the lifting of charged sand grains in an electric field 电场中相对湿度对带电沙粒抬升的影响

IF 3.4 3区地球科学 Q2 GEOGRAPHY, PHYSICAL

Aeolian Research

Pub Date : 2026-03-01 Epub Date: 2026-01-21 DOI: 10.1016/j.aeolia.2026.101033

Qiang Ma , Danyang Liu , Li Xie

In this paper, laboratory experiments of sand grains lifted by an electric field at different relative humidities were carried out. The electric field threshold, E_th, which is the lowest electric field that can lift sand grains in a relative humidity range of 10% to 80%, was experimentally obtained. The experimental results show that E_th decreases with increasing relative humidity for the given grain size, while it remains a constant when the relative humidity exceeds 60%. Based on the kinematics, it can be concluded that the inter-grain bonding forces exhibit the same trend in the relative humidity. An empirical formula of E_th is proposed, which is a function of the sand size and the relative humidity. By the trajectory image processing method, the charges of the lifted sand grains induced by the electric field were measured. It was found that the charges carried by an individual sand grain are independent of the relative humidity, and an empirical formula for the charges carried by an individual sand grain lifted by electrostatic force was obtained. The experimental method used in this paper is reproducible, and can be applied to investigate the dependence of charging characteristics and inter-grain bonding forces of other grains on relative humidity.

本文对不同相对湿度条件下电场对沙粒的抬升进行了室内实验。通过实验得到了在相对湿度为10% ~ 80%的条件下，能够提振沙粒的最低电场阈值Eth。实验结果表明，在一定的相对湿度下，Eth随相对湿度的增加而减小，当相对湿度超过60%时，Eth保持恒定。基于运动学分析，晶粒间结合力在相对湿度下表现出相同的趋势。提出了砂粒度与相对湿度的经验公式。采用轨迹图像处理方法，测量了电场作用下扬起砂粒的电荷。结果表明，单个沙粒携带的电荷与相对湿度无关，并得到了静电力作用下单个沙粒携带电荷的经验公式。本文采用的实验方法重复性好，可用于研究其他颗粒的电荷特性和颗粒间结合力对相对湿度的依赖关系。

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引用次数: 0

Aligning loess with marine and lacustrine sedimentary record around 22.2 cal. kyr B.P. to explore the rapidity of atmospheric circulation change caused by the advance of the Eurasian ice-sheet cover 结合22.2 cal.kyr B.P.前后的海相和湖相沉积记录，探讨欧亚冰盖推进引起的大气环流变化的快速性

IF 3.4 3区地球科学 Q2 GEOGRAPHY, PHYSICAL

Aeolian Research

Pub Date : 2026-03-01 Epub Date: 2026-01-22 DOI: 10.1016/j.aeolia.2026.101034

Jerzy Nawrocki , Olga Rosowiecka , Tomasz Werner

To create credible time frames for two MIS2 loess sections in Central-Eastern Europe, the palaeosecular variation of geomagnetic field curves were elaborated and correlated with existing data from marine and lake sediments. They are benefiting from a more accurate geochronology and continuous sedimentation in water sediments compared to those in the loess. Previous research on the anisotropy of magnetic susceptibility in the loess of Central-Eastern Europe revealed a rapid transition from southern to northern katabatic winds approximately 22–22.7 kyr ago, coinciding with the advance of the Scandinavian Ice Sheet. Our new results indicate that at the Jarosław site, which is separated from the glacier foreland by a morphological ridge and located roughly 300 km from the ice sheet front, this change occurred within a span of no more than 30 years. In an open area, not surrounded by significant elevations, the onset of northern katabatic winds was preceded by a phase of intermediate winds that followed the southern winds, lasting about 110 years at the Korshiv “A” site. The northern winds began blowing approximately 22.2 cal. kyr B.P. in both localities. The beginning of the preceding southern winds aligns well with the end of Heinrich Stadial 2.

为了建立可信的中欧-东欧两个MIS2黄土剖面的时间框架，详细阐述了地磁场曲线的古长期变化，并与现有的海洋和湖泊沉积物数据进行了对比。与黄土沉积物相比，他们受益于更精确的地质年代学和水沉积物的连续沉积。以往对中欧-东欧黄土磁化率各向异性的研究表明，大约在22-22.7 kyr以前，从南风到北风的快速转变与斯堪的纳维亚冰盖的推进相一致。我们的新结果表明，在Jarosław站点，由形态山脊与冰川前陆分开，距离冰盖前缘约300公里，这种变化发生在不超过30年的时间内。在一个开阔的地区，周围没有明显的海拔，在北风开始之前，中风阶段紧随南风，在Korshiv“a”遗址持续了大约110年。北风开始在两个地方吹大约22.2英里/小时。前面的南风的开始与海因里希第2星的结束很好地对齐。

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引用次数: 0

The origin of loess microstructure: 3D insights from initial aeolian dust packing 黄土微观结构的起源：从初始风沙堆积的三维洞察

IF 3.4 3区地球科学 Q2 GEOGRAPHY, PHYSICAL

Aeolian Research

Pub Date : 2026-03-01 Epub Date: 2025-12-30 DOI: 10.1016/j.aeolia.2025.101029

Weiwei Zhang , Yanrong Li , Jianguo Zheng , Yongtang Yu , Xin Huang , Jianmin Zhu

Aeolian deposition is fundamental to the formation of the porous structure of present-day loess. However, the true initial packing structure of loess dust remains poorly understood. In this study, we reconstructed initial loess deposits by simulating the dust deposition process, using Malan loess, which is compositionally analogous to ancient dust, as the raw material. The microstructure of the simulated deposits was characterised using micro-computed tomography (μ-CT) scanning and compared with that of natural Malan loess. The results indicate that the initial loess deposits possessed an exceptionally loose particle packing, with void ratios ranging from 2.79 to 3.75. Loose clay or silt–clay aggregates formed extensively due to inter-particle forces (such as van der Waals force and electrostatic attraction) during deposition. These aggregates, along with isolated detrital particles, acted as the primary skeletal components. Surface clays on skeletal particles play a critical role in bonding adjacent particles, which is essential for establishing and stabilising the loose framework. Notably, the initial deposits with an intermediate clay content (23%) among the samples studied exhibited the loosest microstructure, featuring chain-like particle packing and abundant large overhead pores. The initially loose aggregates and open packings compact over geological time while retaining structural inheritance, resulting in the reduced but partially preserved pore space that shapes the microstructure of present-day loess. This study provides the first direct 3D visualisation and quantification of the initial particle-scale microstructure, offering a key reference for understanding subsequent post-depositional processes and associated geomechanical properties.

风成沉积是现今黄土多孔结构形成的基础。然而，人们对黄土粉尘的真实初始堆积结构仍知之甚少。本研究以成分与古沙尘相似的马兰黄土为原料，通过模拟沙尘沉积过程，重建了初始黄土沉积。利用微计算机断层扫描（μ-CT）对模拟沉积物的微观结构进行了表征，并与天然马兰黄土的微观结构进行了对比。结果表明：黄土初始沉积具有异常松散的颗粒堆积，孔隙比在2.79 ~ 3.75之间；在沉积过程中，由于粒子间的作用力（如范德华力和静电吸引），松散粘土或粉质粘土聚集体广泛形成。这些聚集体，连同孤立的碎屑颗粒，构成了主要的骨骼成分。骨架颗粒表面的粘土对相邻颗粒的粘接起着关键作用，这对松散骨架的建立和稳定至关重要。值得注意的是，粘土含量中等（23%）的初始沉积物的微观结构最松散，具有链状颗粒堆积和丰富的大顶孔。最初松散的团聚体和开放的填料随着地质时间的推移变得紧密，同时保留了结构的遗传，导致孔隙空间减少，但部分保留了孔隙空间，形成了当今黄土的微观结构。该研究首次提供了初始颗粒尺度微观结构的直接三维可视化和量化，为理解后续沉积后过程和相关的地质力学性质提供了关键参考。

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引用次数: 0

A dynamically consistent model for dust-devil-like flows 沙尘暴样气流的动态一致模型

IF 3.4 3区地球科学 Q2 GEOGRAPHY, PHYSICAL

Aeolian Research

Pub Date : 2026-03-01 Epub Date: 2026-01-03 DOI: 10.1016/j.aeolia.2025.101030

Sanjay Kumar Pandey, Kriti Yadav

A generalized analytical model for dust devils with a central low-pressure core is presented in this work. The model incorporates a modified stream function that enables the flow field to satisfy physically relevant boundary conditions and capture essential vortex features, including finiteness of width and off-axis velocity maxima. All three velocity components — radial, axial, and azimuthal — are derived for steady, incompressible, and axisymmetric inviscid flows. An adjustable shape parameter allows the model to flexibly represent varying vortex intensities and core sharpness. Analytical expressions for velocity and pressure distribution are obtained and analysed. The structure predicted from the model is consistent with field observations, including transition from inflow to outflow with height, decay of rotational motion aloft, and confinement of the vortex within a finite periphery. Comparisons with classical vortex models highlight the improved physical realism of the present formulation. Inside the low-pressure core, the radial and azimuthal velocities reverse the direction relative to the outer flow (though vanishing small in magnitude), ensuring they vanish at the core interface and the axis as well.

本文提出了一种具有中心低压核的尘卷的广义解析模型。该模型包含了一个改进的流函数，使流场能够满足物理上相关的边界条件，并捕获基本的涡特征，包括宽度和离轴速度最大值的有限性。所有三个速度分量——径向、轴向和方位角——都是为稳定的、不可压缩的和轴对称的无粘流导出的。可调节的形状参数允许模型灵活地表示不同的漩涡强度和核心锐度。得到并分析了速度和压力分布的解析表达式。模型预测的结构与现场观测一致，包括从流入到流出随高度的转变，高空旋转运动的衰减，以及涡在有限外围的限制。与经典涡模型的比较突出了本公式的物理真实感的改进。在低压堆芯内部，径向和方位角速度与外部流动的方向相反（尽管消失的幅度很小），确保它们在堆芯界面和轴上也消失。

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引用次数: 0

Changes in aeolian saltation cloud properties with wind speed and ripples 风成跃迁云特性随风速和波纹的变化

IF 3.4 3区地球科学 Q2 GEOGRAPHY, PHYSICAL

Aeolian Research

Pub Date : 2025-12-01 Epub Date: 2025-09-08 DOI: 10.1016/j.aeolia.2025.100996

Madeline M. Kelley , Ian J. Walker , Mark Schmeeckle , Christy Swann , Ron Dorn , Micheala Roberts , Patrick O’Brien

Aeolian sediment transport shapes landscapes on Earth and other planetary surfaces, yet key uncertainties remain in how the near-bed saltation cloud responds to changing wind and surface conditions. Leveraging recent advances in image-based particle tracking, we conducted wind tunnel experiments using high-speed imaging and Particle Tracking Velocimetry to quantify sand grain trajectories in saturated saltation clouds over both flat and rippled beds. Our open-source PTV workflow resolved particle motions within millimeters of the bed across a range of wind speeds. Supporting previous results, we find that mean particle velocities do not scale linearly with wind speed; instead, changes in particle velocity distributions—including skewness and kurtosis—emerge as wind strength and sediment flux increase. At higher transport rates, distinctions among saltation, reptation, and creep within the particle distribution become more smoothed, suggesting a continuum spectrum of particle behavior rather than discrete transport modes. Our new dataset of particle trajectories over an active rippled bed shows distinctions in particle speed across the aspects. On ripple stoss slopes, fast saltating grains co-occur with slow creeping particles, while lee slopes are depleted of slower grains, consistent with shadowing effects. These observations support a feedback between ripple morphology and near-bed particle trajectories, with implications for how splash events redistribute sediment momentum. This study contributes new high-resolution empirical data that illuminate how saltation cloud structure evolves with wind forcing and bedform development, advancing our understanding of aeolian sediment transport under complex, dynamic conditions.

风成沉积物的运输塑造了地球和其他行星表面的景观，但关键的不确定性仍然存在于近床跃迁云如何响应不断变化的风和地面条件。利用基于图像的颗粒跟踪技术的最新进展，我们利用高速成像和颗粒跟踪测速技术进行了风洞实验，量化了平坦和波纹床上饱和跃动云中沙粒的轨迹。我们的开源PTV工作流程在风速范围内解决了距离床毫米范围内的粒子运动。支持先前的结果，我们发现平均粒子速度不与风速成线性关系；相反，粒子速度分布的变化——包括偏度和峰度——随着风强度和泥沙通量的增加而出现。在较高的输运速率下，粒子分布中的跳跃、重复和蠕变之间的区别变得更加平滑，这表明粒子行为的连续谱而不是离散的输运模式。我们在一个活跃的波纹床上的粒子轨迹的新数据集显示了粒子速度在各个方面的区别。在波纹坡上，快速跳跃的颗粒与缓慢爬行的颗粒同时出现，而背风坡上则没有较慢的颗粒，这与阴影效应一致。这些观测结果支持波纹形态和近床颗粒轨迹之间的反馈，并暗示飞溅事件如何重新分配沉积物动量。该研究提供了新的高分辨率经验数据，阐明了跃迁云结构如何随着风强迫和地形发展而演变，促进了我们对复杂动态条件下风成沙输运的理解。

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引用次数: 0

Corrigendum to “Off-season wind-induced soil erosion from potato fields under varying bedding preparations”. [Aeolian Res. 74 (2025) 101000] “不同垫层处理下马铃薯田非季节风致土壤侵蚀”的勘误表。[风沙法令74 (2025)101000]

IF 3.4 3区地球科学 Q2 GEOGRAPHY, PHYSICAL

Aeolian Research

Pub Date : 2025-12-01 Epub Date: 2025-11-20 DOI: 10.1016/j.aeolia.2025.101013

Matt Ball , Guillermo Hernandez-Ramirez , Willemijn Appels , Sheng Li , Rezvan Karimi Dehkordi

引用次数: 0

Provenance of sediments in a deep-sea core offshore Kangaroo Island spanning the last 125 ka 袋鼠岛近125 ka深海岩心沉积物的物源

IF 3.4 3区地球科学 Q2 GEOGRAPHY, PHYSICAL

Aeolian Research

Pub Date : 2025-12-01 Epub Date: 2025-08-20 DOI: 10.1016/j.aeolia.2025.100997

Jan-Berend W. Stuut , Patrick De Deckker , Rick Hennekam

It is common practice nowadays to assess the presence of terrigenous (land-derived) sediments in deep-sea cores using bulk geochemical data, but the key issue is to identify the source of these sediments and the way they were transported to the core site in order to interpret their palaeoclimatic significance. Here, we demonstrate a new approach taken to geochemically-fingerprint a large set of sediments collected from potential source areas (PSAs) in southeastern and southcentral Australia and to compare these data with the record obtained from X-ray Fluorescence (XRF) scanning on a long deep-sea sediment core MD03-2607 obtained offshore Kangaroo Island, South Australia. The entire data set of samples collected on land as well as the downcore measurements were unmixed using the numerical end-member method AnalySize. We successfully use the elements Al, Fe, K, Mn, S, Sr and Y to define end members. In addition, the on-land occurrences of the chemical ratios of Zr/Zn, Ti/Rb, Ti/Y and Zr/Rb are used to support the provenance of the chemical end-members. Three main PSA’s are defined: Murray River Basin (MRB), Darling River Basin (DRB) and Kati Thanda – Lake Eyre District (LED), of which the MRB is represented in two different chemical end members. The downcore contributions of these end members in the sediment core are consequently interpreted in terms of fluvial (MRB and DRB) versus aeolian (LED) input. We determined the origin of the terrigenous sediments recovered from the core for the last glacial-interglacial cycle, with implications for atmospheric circulation across southern Australia.

目前普遍的做法是利用大量地球化学数据来评估深海岩心中陆源（陆源）沉积物的存在，但关键问题是确定这些沉积物的来源及其运输到岩心地点的方式，以解释其古气候意义。在这里，我们展示了一种新的方法，对从澳大利亚东南部和中南部潜在源区（PSAs）收集的大量沉积物进行地球化学指纹，并将这些数据与从南澳大利亚袋鼠岛近海获得的长深海沉积物岩心MD03-2607上获得的x射线荧光（XRF）扫描记录进行比较。使用数值端元法AnalySize对陆地上收集的整个样本数据集以及岩心测量结果进行了分析。我们成功地使用元素Al， Fe， K, Mn， S， Sr和Y来定义端元。此外，利用Zr/Zn、Ti/Rb、Ti/Y和Zr/Rb化学组分在陆地上的出现情况，支持了化学端元的来源。定义了三个主要的PSA：墨累河流域（MRB），达令河流域（DRB）和卡蒂坦达-艾尔湖区（LED），其中MRB在两个不同的化学末端成员中表示。因此，沉积物岩心中这些末端成员的下岩心贡献被解释为河流（MRB和DRB）与风成（LED）的输入。我们确定了最后一次冰期-间冰期旋回的陆源沉积物的来源，并对南澳大利亚的大气环流产生了影响。

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引用次数: 0

Validation of a 10-meter wind in simulating a dust event in northwestern Iran mountains (October 28–31, 2017) 10米风在伊朗西北部山区沙尘事件模拟中的验证（2017年10月28-31日）

IF 3.4 3区地球科学 Q2 GEOGRAPHY, PHYSICAL

Aeolian Research

Pub Date : 2025-12-01 Epub Date: 2025-09-19 DOI: 10.1016/j.aeolia.2025.101002

Elham Mobarak Hassan , Mahnaz Karimkhani , Noushin Khoddam , Jeff Sepehri

This study evaluates the performance of the WRF-Chem model in simulating near-surface winds in Northwest Iran, a region prone to dust events due to its high mountains and diverse structures. Using data from October 28 to 31, 2017, the study first examines dust conditions through visibility and satellite images. The model’s accuracy in simulating 10-meter wind speed and direction in three nested with the MYJ and YSU boundary layer schemes is then assessed against observational data. Results indicate that the primary source of dust on October 29 was desert areas in Iraq and northern Saudi Arabia, with the dust mass transported to Northwest Iran. The study observes the highest intensity and duration of the dust moving from southwest to northeast within the area. The WRF-Chem model shows good performance in simulating wind speed and direction, with the MYJ scheme performing better than YSU in a selected dust case in northern west of Iran. The study also highlights that while improving resolution enhances station altitude values, it alone does not significantly improve model results. In this case, the utilization of a two-way ANOVA revealed that the boundary layer affects the accuracy of 10-meter wind speed estimation at different stations. These findings underscore the importance of considering boundary layer schemes and mountain characteristics in improving the accuracy of models simulating wind patterns in mountainous regions. The WRF-Chem model adequately simulates wind direction in this region, especially when the dominant wind direction at a station falls within a specific geographical dominant sector.

本研究评估了WRF-Chem模式在模拟伊朗西北部近地面风方面的性能，该地区由于其高山和多种结构而容易发生沙尘事件。该研究使用了2017年10月28日至31日的数据，首先通过能见度和卫星图像检查了尘埃状况。然后根据观测资料评估了该模式在MYJ和YSU边界层方案的三个嵌套中模拟10米风速和风向的精度。结果表明：10月29日沙尘的主要来源是伊拉克和沙特阿拉伯北部的沙漠地区，沙尘团向伊朗西北部输送。研究发现，沙尘在该区域内由西南向东北移动的强度和持续时间最高。WRF-Chem模式在模拟风速和风向方面表现出较好的效果，其中MYJ方案在伊朗西部北部沙尘条件下的模拟效果优于YSU方案。研究还强调，虽然提高分辨率可以提高站高值，但仅提高分辨率并不能显著改善模型结果。在这种情况下，利用双向方差分析发现，边界层影响不同站点10米风速估计的精度。这些发现强调了考虑边界层方案和山地特征对提高山区风型模拟模式精度的重要性。WRF-Chem模式充分模拟了该地区的风向，特别是当一个站点的主导风向落在特定的地理主导扇区内时。

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引用次数: 0

Luminescence dating and the sedimentary pattern of loess on the Tibetan Plateau 青藏高原黄土的发光测年与沉积模式

IF 3.1 3区地球科学 Q2 GEOGRAPHY, PHYSICAL

Aeolian Research

Pub Date : 2025-12-01 Epub Date: 2025-07-11 DOI: 10.1016/j.aeolia.2025.100994

Qiufang Chang , Xiaodong Miao , Xingjun Xie , Zhongping Lai

Aeolian sediments in the Tibetan Plateau are important records for climate change and atmospheric circulation. Previous studies suggested that the interior Tibetan loess accumulated mostly in the Holocene (<11.7 ka) marked by warming and wetting climate with an increased vegetation cover, thereby facilitating dust entrapment, and that this Tibetan dust accumulation model is different from that of the Chinese Loess Plateau (CLP). In longer time scales (>11.7 ka), did Tibetan loess deposited in warm/wet period as well? To answer this question, we presented 23 loess luminescence ages from five aeolian deposit profiles in the central Tibetan Plateau covering a large area. The results demonstrate loess deposition at around 30 ka and 75 ka, corresponding to warm and wet marine isotope stage (MIS) 3 and 5. In contrast, in the MIS 2 and 4, little to no loess was detected. Thus, we conclude that Tibetan loess accumulated mainly during warm/wet periods in the orbital time scale, and vegetation cover played a key role on loess accumulation and subsequent ecological system. This study sheds light on the Tibetan Plateau dust and loess research, and further provides basic scientific data for comprehensive understanding of the TP ecosystem for sustainable development.

青藏高原风成沉积物是气候变化和大气环流的重要记录。前人研究认为，青藏高原内陆黄土主要在气候变暖湿润、植被覆盖增加的全新世（11.7 ka）积累，有利于沙尘的淤积，与中国黄土高原（CLP）不同。在更长时间尺度上（>11.7 ka），青藏高原黄土是否也处于暖/湿期沉积？为了回答这个问题，我们从青藏高原中部覆盖面积较大的5个风成沉积剖面中获得了23个黄土发光年龄。结果表明，黄土沉积时间约为30 ka和75 ka，对应暖湿海相同位素阶段（MIS） 3和5。而在MIS 2和MIS 4中，几乎没有发现黄土。因此，在轨道时间尺度上，青藏高原黄土主要在暖湿期积累，植被覆盖对黄土积累及其后续生态系统起关键作用。本研究为青藏高原沙尘和黄土研究提供了新的思路，为全面认识青藏高原生态系统的可持续发展提供了基础科学数据。

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引用次数: 0