Institute of Atmospheric Physics

Linking molecular composition of organic aerosols to reactive oxygen species formation using an MCR-VK framework

Abstract. Reactive oxygen species (ROS) formation by atmospheric fine particulate matter (PM) is widely implicated in adverse health effects, yet the molecular determinants of particle-level ROS formation remain poorly constrained, largely due to the chemical complexity of organi...

Molecular evolution of oxygenated organic molecules in a cloud-influenced forested mountain environment

Abstract. Atmospheric oxygenated organic molecules (OOMs) link the oxidation of volatile organic compound to secondary organic aerosol formation, yet their molecular evolution in cloud-influenced forested mountain environments remains poorly constrained. Here, gas-phase OOMs were...

Condensation Sink Efficiency of Atmospheric Particles Regulated by Their Chemical Compositions and Hygroscopicity

Abstract Condensation sink (CS) from atmospheric pre-existing particles is a crucial limiting factor for the occurrence of new particle formation (NPF). However, intense NPF events occur frequently in polluted urban areas despite high CS levels. Here, to address this discrepancy,...

Enhancing the advection module performance in the EPICC-Model V1.6.0 via GPU-HADVPPM4HIP V1.0 coupling and GPU-optimized strategies

Abstract. The rapid development of Graphics Processing Units (GPUs) has established new computational paradigms for enhancing air quality modeling efficiency. In this study, the heterogeneous-compute interface for portability (HIP) was implemented to parallel computing of the pie...

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...

A two-stage cascaded prediction framework for urban inundation depth using a dual-branch CNN-ConvLSTM network

Study region Shenzhen, China, is a densely urbanized subtropical megacity characterized by extensive impervious surfaces, rapid runoff responses, and frequent rainfall-induced inundation. Study focus To address the underestimation of urban inundation depth driven by severe zero-i...

Wetland restoration enhances ecological quality in urbanizing regions

Abstract Introduction Rapid urbanization and climate change drive widespread wetland degradation, yet it remains unclear whether wetland restoration improves ecological quality (EQ), a composite indicator reflecting vegetation, thermal, hydrological, environmental, and soil condi...

Enabling climate action: A nexus approach for delivering co-benefits across biodiversity, water, food, and health

Climate response options rarely affect biodiversity, water, food, and health in uniform ways. This comparative analysis examines why technically viable response options generate uneven cross-nexus outcomes, and how governance and justice conditions shape whether these outcomes be...

The 2022 Record‐Breaking Northeastward Shift of South Asian High Since 1980: The Role of the Gulf Stream

ABSTRACT In August 2022, the South Asian High (SAH) deviated from its typical northwest–southeast displacement pattern and exhibited a record‐breaking northeastward shift over the period 1980–2024. Accompanying this displacement, a deep and persistent high‐pressure centre develop...

The Role of Local Wave Activity in Influencing Extreme Precipitation Patterns Over North and Northeast China

ABSTRACT Warm‐season extreme precipitation over North and Northeast China is a major regional hazard and is strongly influenced by large‐scale atmospheric circulation. However, how large‐amplitude wave activity varies among different spatial patterns of extreme precipitation rema...

Size‐Resolved Particle Effective Density in the Free Troposphere at Mt. Hua, China: Influence of Chemical Aging and Sources

Abstract Effective density ( ρ eff ) is a key physical property of atmospheric particles, yet it has rarely been investigated in free tropospheric environments. It is largely determined by chemical compositions and particle morphology, providing valuable insights into atmospheric...

Volcanic Aerosol Forcing Suppresses Tropical African Rainfall: Mechanisms and Modulation by a Warmer Climate

Abstract Volcanic eruptions are among the most abrupt natural forcings of the climate system and can induce pronounced hydroclimatic disruptions, particularly in monsoon‐influenced regions. Using a 30‐member CESM ensemble, we examine how the 1815 Tambora‐size eruption would affec...

Concurrent Eurasian Heatwaves Will Intensify Beyond the Mean Warming

Abstract Concurrent heatwaves over Europe and North China are the most frequent compound heat extremes across the Northern Hemisphere. They are systematically organized by a recurrent teleconnection along the polar front jet over Eurasia. Using observations and large‐ensemble sim...

Seasonally Regionalized Interdecadal Decrease in Extreme Precipitation Over the Tropical Indo‐Western Pacific Region Around 2008/2009

Abstract Increase in extreme precipitation is expected with global warming that leads to an increase in atmospheric moisture content. Here, we present evidence for interdecadal decrease in extreme precipitation frequency and amount around 2008/2009 over the tropical Indo‐western...

Extratropical teleconnections in a multi-model ensemble nudged towards the observed QBO

The Quasi-Biennial Oscillation (QBO), the dominant mode of interannual variability of monthly-mean zonal winds and temperatures in the equatorial stratosphere, has a significant influence on the circulation in other regions of the stratosphere and troposphere in boreal winter. To...

Evaluation of NEX-GDDP-CMIP6 and CMIP6 for Extreme High Temperature Frequency and Intensity in the Sichuan–Chongqing Region with Future Projections

Based on CN05.1 observational data, this study systematically evaluates the performance of the NASA Earth Exchange Global Daily Downscaled Projections (NEX-GDDP-CMIP6) and the original Coupled Model Intercomparison Project Phase 6 (CMIP6) in simulating extreme high-temperature (E...

Nonlinear hydrological responses to intermediate development pathways in semi-arid watersheds

Hydrological vulnerability in semi-arid watersheds is increasingly shaped by coupled climate and land-use change, yet the relative importance of runoff and sediment dynamics remains unclear. Here, we develop an integrated socio-hydrological framework that combines SWAT modeling,...

Asymmetric Response of Land Precipitation Variability Under Carbon Dioxide Removal

Abstract Precipitation variability describes fluctuations between wet and dry conditions and plays an important role in shaping hydrological extremes and their societal impacts. Using idealized carbon dioxide removal experiments from CMIP6 models, we assess how precipitation vari...

Spatiotemporal Variations in Aerosol Optical Depth and Their Relationships with Cloud Properties and Precipitation over Sudan: Insights from Satellite Observations and CMIP6 Model Projections

This study investigates how dust and sulfate aerosols modulate cloud properties and rainfall over Sudan, a key part of the Sahara–Sahel dust belt. Satellite and reanalysis products (MODIS, CHIRPS, MERRA 2, EAC4) are combined with four CMIP6 models to analyze rainy season (JJAS) a...

Contrasting Terrestrial Moisture Controls on Precipitation and Interannual Variability across the Southern and Northern Tibetan Plateau

The Tibetan Plateau (TP) plays a crucial role in the Asian hydrological cycle, yet the dominant moisture sources and their governing physical processes remain debated. Here, we employ the Eulerian water tracer technique embedded in Community Earth System Model version 1 (CESM1),...