Researchers used a container to measure light extinction coefficients, gaseous NO2, and black carbon from ground surface to 260m during daytime and nighttime. The study found temperature inversion and local emissions as major factors affecting vertical profiles of air pollutants.
Researchers found significant variations in high-frequency oscillation periods across different sea areas in the Western North Pacific. In the South China Sea, these oscillations occur at shorter intervals than in open water areas.
Research found that GEOS-5-assimilated planetary boundary layer height (PBLH) and relative humidity (RH) vary significantly across China's four regions, with Tibetan Plateau having the highest PBLH values and South China the lowest RH. Seasonal variations also played a crucial role in shaping these patterns.
Research reveals a significant relationship between the Silk Road Pattern and Eurasian climate anomalies, particularly in strong north-jet years. Stronger-than-usual Rossby wave source anomalies contribute to this link, suggesting more attention be given to these years.
The APSOS facility in Tibet provides range-resolved profiles of atmospheric variables and constituents, including temperature, wind, water vapor, and greenhouse gases. Long-term measurements are being taken to establish the first whole-atmosphere measurement database over the Tibetan Plateau.
A study using climate models found that limiting warming to 1.5C instead of 2C can reduce extreme heat events in East Asia by 35-46%. This means that reducing global warming would have a significant impact on the region, with Mongolia experiencing the greatest benefits.
Scientists developed a lightning-based approach to predict short-duration rainfall, using sharp increasing rates of lightning flashes to provide early warnings. The new method was tested over the Beijing Metropolitan Region and showed encouraging model performance, with successful early warnings for 67.8% of moderate and 87.0% of inten...
Scientists investigated aerosol optical properties and radiative effects in the Pearl River Delta region of China. They found that fine-mode strongly absorbing particles dominated aerosols during the dry season, significantly influencing radiation exchange between Earth's surface and atmospheric system.
According to an updated analysis from the Institute of Atmospheric Physics/Chinese Academy of Sciences, 2017 was the warmest year on record for the global ocean. The oceans accumulated 1.51 × 10^22 J of heat, surpassing the previous second-warmest year of 2015.
Ground-based measurements over southeastern China reveal significant aerosol indirect effects, but satellite studies have large uncertainties due to inherent limitations. The study provides a comprehensive investigation into the AIE and highlights the importance of using ground-based measurements for accurate quantification.
Fine aerosol particles in Beijing exhibit high growth rates, with frequent events occurring approximately every 20 hours. The study reveals that nucleation is the dominant mechanism driving these growth events, contributing to haze formation and air quality issues.
Researchers analyzed three weather systems to understand how aerosols influence cloud formation and development. The study highlights the complexity of aerosol-cloud-precipitation-radiation interactions, which vary on a case-by-case basis.
Researchers have discovered that different aerosol types can act as cloud condensation nuclei, affecting cloud behavior and resulting precipitation. The study highlights the importance of considering aerosol type in understanding cloud formation and precipitation interactions.
A new special issue of Advances in Atmospheric Science explores the effects of aerosols on climate, with studies focusing on aerosol-cloud interactions, cloud-base height, and fine aerosol particles. The research aims to improve weather forecasting and climate models, shedding light on a crucial topic despite years of inquiry.
A recent study found that the biennial rainfall relationship between Central America and equatorial South America has weakened remarkably since 2000. This weakening is attributed to changes in El Niño-Southern Oscillation (ENSO) and tropical North Atlantic sea surface temperature (SST) patterns.
Researchers used a probabilistic approach to attribute the extreme event to natural variability and anthropogenic forcing. They found that strong El Niño events significantly increase the risk of extreme rainfall, but also suggest smaller-scale anthropogenic contributions.
A record-breaking cold event in Eastern China in 2016 was found to be less likely due to human influences, with anthropogenic forcings estimated to have reduced the likelihood by about 2/3.
Researchers studied black carbon aerosols from biomass burning under different combustion conditions, finding varying mixing states. The study revealed intense coagulation during flaming combustion, resulting in a thicker coating on rBC particles.
Research on turbulent broadening of cloud droplet size distributions and warm rain initiation has made significant progress in recent years. The study highlights the effects of turbulence on spectral broadening and collision-coalescence processes, with Chinese scientists playing a key role.
Researchers use large ensemble of model simulations to examine lead-lag relationships between Arctic sea ice and atmospheric circulation. They find evidence that sea ice change is both a driver of and a response to atmospheric variability.
Researchers propose 'anomalous moist enthalpy advection mechanism' to explain WNPAC formation. This new theory suggests that atmospheric dynamics and thermodynamics drive WNPAC maintenance, rather than local air-sea interactions.
A new study explores how Arctic sea-ice decline affects Eurasian circulation, revealing a link between the two. The research uses SVD analysis to quantify model uncertainties and find that a larger pan-Arctic sea-ice decline weakens the polar cell, leading to anomalous sinking motion in Eurasia.
The Arctic's rapid warming and sea ice loss have significant impacts on Eurasian weather and climate, particularly in winter. The study finds that sea areas and western coasts of continents are relatively less affected, while continental regions, especially over Eurasia, experience the strongest influence.
A special issue of Advances in Atmospheric Sciences highlights recent research on Arctic-midlatitude linkages. The study aims to improve understanding and prediction of Arctic change, which influences extreme weather events in the mid-latitudes.
A recent study investigates the relationship between Arctic sea ice loss and the Eurasian winter cooling trend. The research suggests that changes in sea surface temperature, not sea ice concentration, are responsible for the observed warming trend.
A new study proposes a generic methodological framework to accurately quantify the greenhouse gas footprints of crop cultivation systems. The framework takes into account direct and indirect contributors, providing example values of emission factors and emphasizing the combination of measurements and model simulations.
Cloud detection by satellites MODIS, CALIPSO, AIRS and CloudSAT onboard A-Train satellite constellation during severe haze episodes in winter 2015-2016 found haze impacts cloud observation. MODIS misclassified aerosol as cloud, suggesting caution when using its cloud product
Researchers Prof. Fei Zheng and Jin-Yi Yu found significant skill score differences between EP and CP El Niño events, with EP events better predicted at all lead times. This is attributed to systematic forecast biases and an overly warm eastern Pacific during the spring season for CP El Niño prediction.
A recent study reveals that high-latitude volcanic eruptions can transport sulfate aerosols into the tropical stratosphere, influencing both hemispheres' climates. The research found that favorable atmospheric conditions can enable such long-distance transport, making these eruptions a global concern.
A study reveals multidecadal variations in the relationship between East Asian summer monsoon (EASM) and El Niño-Southern Oscillation (ENSO). The research used a coupled climate model to investigate the decadal changes, finding that ENSO-related circulation anomalies drive precipitation patterns over East Asia.
A new study compares the spatiotemporal characteristics of global drylands using three different drought indices: SWI, PET_Th, and PET_PM. The researchers found that the Surface Wetness Index (SWI) yields broadly similar results to the Thornthwaite method when considering interdecadal variability of global and continental drylands.
A new multivariable integrated evaluation (MVIE) method provides a comprehensive and quantitative evaluation of climate model performance. The method includes three levels of statistical metrics, offering an integrated evaluation of model performance in simulating multiple fields.
The Institute of Atmospheric Physics published a special issue in AAS to commemorate Duzheng Ye's life's achievements. The collection focuses on Ye's theories and their impact on modern weather forecasting, climate change research, and Tibetan Plateau meteorology.
A new IASI channel selection method has been developed to improve weather forecasting accuracy by reducing bias in humidity forecasts. The method used a one-dimensional variational analysis approach to select 200 new channels from the available 314 channels.
Researchers found that 2/3 of heat wave variability in the Yangtze River valley can be explained by sea surface temperature forcing, while 1/3 is attributed to atmospheric internal variability. Non-ENSO SST anomalies also contribute to heat waves.
Scientists found that mid-latitude circulation anomalies led to a negative YRV rainfall anomaly in August 2016, opposite to the strong positive anomaly in 1998. These anomalies resulted from the 'Silk Road Pattern' and increased anticyclonic circulation over East Asia.
A research project led by CityU aims to understand the relationship between the East Asian Winter Monsoon and blocking events, and how Arctic amplification may impact the region's climate. The study hopes to provide valuable insights for policymakers evaluating the risk of cold extremes in East Asia.
A new method, NLLE, generates ensemble initial perturbations with similar forecast skill to ETKF scheme. It offers a time-saving alternative to ETKF scheme in high-dimensional models.
A recent paper revisits an idea proposed by Chinese meteorologist Duzheng Yeh in 1959 about abrupt seasonal changes in the general circulation. The study's authors successfully reproduce these transitions without lower-boundary inhomogeneities, sparking questions about their underlying causes.
Researchers developed a new approach to identify individual equatorial waves in wind and geopotential height fields using classical equatorial wave theory. This allows for the temporal and spatial evolution characteristics of equatorial waves, including their initiations, propagations, and interactions with tropical convections.
The paper highlights the value of considering multiple viewpoints and levels of description to tackle complex scientific and philosophical questions. By recognizing unconscious assumptions and leveraging the strengths of both brain hemispheres, science can achieve more powerful problem-solving.
Global warming is expected to impact subtropical anticyclones differently in the Northern and Southern Hemispheres. In the North, the subtropical anticyclone over the South Atlantic will weaken, while those over the North Pacific and South Pacific will strengthen.
The study reveals that ancient China experienced four warm epochs, including the 20th century, with temperatures comparable to current levels. This challenges the idea that modern warming is unprecedented in recent history.
Scientists reconstructed annual temperature anomaly in southern China from 1850-2009 using high-resolution temperature proxies. The results show robust centennial warming and a first rapid cooling followed by significant warming intervals, with the most recent being from 1970, featuring unprecedented warmth rates.
The AAS Special Issue on the Chinese Carbon Budget Program presents research on accurate estimation of national GHG emissions, terrestrial carbon budget, and potential for increasing carbon sinks. Eight papers cover various topics, including aerosols, airborne observations, and CO2 monitoring from space.
Air quality has deteriorated in Dunhuang due to increased human activities, shifting from dust aerosol alone to a mixture of coarse and fine particles. Seasonal characteristics show significant variations in aerosol optical properties, with dust aerosols dominating during spring and fine urban aerosols during summer.
A new study analyzing multiple ocean datasets reveals that the oceans are robustly warming, regardless of data used. The heat redistribution among global oceans experienced a significant shift over several decades.
A significant warming trend is observed globally since the mid-1990s, with Europe-West Asia and northeast Asia experiencing the most pronounced warming. This warming has led to increased casualties from hot events, with a 23-fold increase in deaths between 2001-2010 and 1991-2000.
A recent study reveals that the Asian summer monsoon significantly contributes to aerosol formation in the Northern Hemisphere's lower stratosphere, with a 15% annual contribution. The anticyclonic Asian monsoon serves as an efficient smokestack venting aerosols to the upper troposphere and lower stratosphere.
Scientists at the Institute of Atmospheric Physics have developed a new parameter called potential deformation (PD) to diagnose heavy precipitation. PD is closely related to the occurrence and distribution of strong precipitation, with a correlation coefficient reaching up to 0.7.