Chinese Academy of Sciences

Warm-sector heavy rainfall over the eastern China plains: identification, characteristics, and precursor dynamic signals

Abstract. Warm-sector heavy rainfall (WSHR) features small spatial scales, posing critical forecast challenges, while its fractional contribution to regional heavy rainfall and its short-term precursors remain poorly quantified. Drawing on 2021–2025 warm-season (June–September) o...

Room-temperature terahertz emission from N-polar GaN grating-gate high-electron-mobility transistors

Compact, electrically driven terahertz (THz) sources remain a major bottleneck for chip-scale spectroscopy, imaging and high-speed wireless links. AlGaN/GaN two-dimensional electron gas (2DEG) systems have been investigated for THz emission, but experimental demonstrations have a...

Diversity–multifunctionality relationships shift with increasing aridity in grasslands

Grasslands, a dominant global ecosystem, face an uncertain future. Diverse grasslands can maintain multiple functions (multifunctionality); however, the relative roles of species diversity and functional diversity in promoting this resilience remain unclear. We examined how the d...

Directional Nanoparticle Migration Driven by Mobility Gradient in Glassy Polymers

Abstract How to precisely control the distribution of nanoparticles in a polymer matrix is a long-standing issue in polymer nanocomposites. In this work, we introduce a simple yet effective methodology to generate surface concentration gradients of nanoparticles in polymer films....

Cloud vertical structure across China from a national Ka-band cloud radar network: thermodynamic, dynamical, and land-surface controls

Abstract. Cloud vertical structure plays a central role in regulating Earth’s radiation balance and hydrological cycle, yet it remains poorly represented in weather and climate models due to limited high-resolution observations. Using a newly established national network of 80 Ka...

Applicability evaluation of thermal insulation for existing ballasted railway and its strengthening method in cold regions

Insulation boards are widely adopted to mitigate frost heave in cold-region subgrades. However, their effectiveness and applicability under shallow groundwater levels and high water contents remain insufficiently understood. In this study, a coupled moisture–heat–mechanical model...

Repeatable Velocity Fine Structure of Lightning K‐Leaders From a Single VHF Interferometer Made Three‐Dimensional

Abstract K‐processes re‐illuminate lightning channels at speeds of order 10 7 m s −1 , but measuring their three‐dimensional (3‐D) propagation velocity has required multi‐station systems available at few sites. An error‐isomorphism range inversion upgrades a single very‐high‐freq...

Holographic multipartite entanglement dynamics in AdS3-Vaidya

A bstract We study how multipartite entanglement is dynamically reorganized during holographic thermalization following a global quench in AdS 3 /CFT 2 . We first use the n -partite information (− 1) n I n to probe collective multipartite entanglement in holographic configuration...

Atmosphere-Induced Preferentially Oriented Growth: Crystalline Evolution and a Tunable Optical Band Gap in Bismuth-Derived β-Bi2O3 Films

Abstract The controllable synthesis of β-Bi2O3 thin films with specific crystallographic orientations is essential for optoelectronic device applications. However, achieving precise orientation control by modulating the growth conditions remains a significant challenge. In this w...

Short-Term Simulated NH4+/NO3− Inputs Reorganize Soil Microbial Communities and Modify N-Cycling Functional Potential in Temperate Forests

Forest soil nitrogen (N) turnover and nitrous oxide (N2O) release are strongly influenced by atmospheric N deposition. Although the effects of individual inorganic N species on soil biogeochemistry are well documented, the consequences of changing their relative supply for N2O fo...

Radio Sounding Determination of Two‐Dimensional Plasma Structure Velocity

Abstract The Mars spacecraft Tianwen‐1 transmitted radio signals to Earth for its orbit determination. The frequencies of the radio signals exhibited sharp variations when an ICME passed through the Mars‐Earth signal path on 18 June 2021. These sharp variations were observed at d...

From pollution control to system governance: five decades of environmental policy evolution in China

China's environmental governance has undergone a profound transformation since the late 1970s, with implications that extend far beyond its borders. Existing accounts of this evolution rely largely on qualitative periodisation and expert interpretation, offering limited capacity...

High‐Resolution Temperature and Precipitation Variability in Northeast Asia Since the Last Glacial Maximum Recorded in an Annually Laminated Maar Lake

Abstract Temperature and precipitation variability in monsoonal Asia is central to understanding regional climate dynamics and global teleconnections. How post‐LGM warming and hydroclimate change unfolded in Northeast Asia, and how they were linked to external forcing, remain poo...

Evaluating the EPICC-Model for regional air quality simulation: a comparative study with CAMx and CMAQ

Abstract. This study presents a systematic evaluation of China’s independently developed EPICC-Model for regional PM2.5 and MDA8 O3 simulations against established international models, using WRF meteorological fields and a multi-source integrated emission inventory. Results high...

Record‐High Birefringence Achieved by Linearly Extended π‑Conjugated Building Blocks in Metal‐Free Sulfate

ABSTRACT The advancement of birefringent materials is critical for next‐generation integrated photonics, yet conventional systems face intrinsic limitations in birefringence magnitude. Sulfate crystals offer a promising platform but have been hindered by their dependence on speci...

DSCrisk: A dual-view and substructure aware based method for drug-drug interaction risk-level prediction enhanced by contrastive learning

Combination pharmacotherapy remains a fundamental strategy in contemporary clinical practice. However, the concurrent use of multiple drugs substantially increases the risk of harmful drug-drug interaction events (DDIEs). Developing reliable computational methods for DDIE detecti...

An Atomic-Scale Chemical Switch for Oxide Ferroelectricity

Abstract Interfacial chemistry offers new opportunities for designing ferroelectric materials, yet their coupling with intrinsic polarization remains largely unexplored. Here, we synthesize ferroelectric BiFeO3 nanoparticles with {100} facets covered by a Bi2FeO6-x Aurivillius-li...

Contrasting climatic controls on bimodal growth of Pinus elliottii plantations between northern and southern subtropical zones

Subtropical plantation forests play a crucial role in the global carbon cycle, yet intensifying global warming may exert profound impact on tree growth and forest carbon uptake. Pinus elliottii Engelm. is a widely planted and representative plantation species in subtropical regio...

Micro/Nanostructured Materials and Microfluidic Diagnostic Platforms Enable Multimodal Detection of Circulating Tumor Cells

ABSTRACT Circulating tumor cells (CTCs), as pivotal targets in liquid biopsy, offer dynamic, multidimensional insights into tumor heterogeneity and metastatic progression. However, their extreme rarity, pronounced heterogeneity, and the complexity of the blood microenvironment se...

Navigating resource constraints in the Yellow River Basin: Drivers and coupling dynamics of the Water-Land-Energy-Carbon nexus

Facing critical resource depletion in the Yellow River Basin, this study establishes a unified framework to analyze the coupled interactions of Water, Land, Energy, and Carbon (WLEC). We quantified WLEC resource distribution, assessed the spatiotemporal dynamics of coupling coord...