Browse Articles
Unexpected Increases of Severe Haze Pollution During the Post COVID‐19 Period: Effects of Emissions, Meteorology, and Secondary Production
-  27 January 2022
Key Points
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Unexpectedly severely haze episodes were observed in March 2021 in Beijing
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Clear increases in primary emissions during the post-COVID-19 period in Beijing
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Largely different responses of aerosol species to meteorology in different months
Observed Surface Drag Coefficient Under High Wind Speed Conditions and the Relationship With Coherent Structures
-  26 January 2022
Key Points
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The reduction of surface drag coefficient with high wind speed is observed over land
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The reducing aerodynamic drag occurs at > 15 m s−1 over land compared to 30–35 m s−1 over oceans
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The reducing surface drag is due to the low vertical transport efficiency of large scale turbulent eddies in high wind conditions
Assessing the Modern Multi‐Decadal Scale Aridification Over the Northern China From a Historical Perspective
-  26 January 2022
Key Points
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Duration and magnitude of the current aridification are more prominent than most of historical aridifications during the last millennium
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Anthropogenic forcings result in a significant larger aridification rate than other historical aridifications
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Only combined impacts from internal variability and anthropogenic forcings can result in such a severer aridification
Evaluating the Nature and Extent of Changes to Climate Sensitivity Between FGOALS‐g2 and FGOALS‐g3
-  26 January 2022
Key Points
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The decrease in equilibrium climate sensitivity in FGOALS-g3 is directly related to its stronger negative shortwave cloud feedback
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The changes in surface albedo and cloud feedbacks are linked to the changed mean state and feedback in FGOALS-g3
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The differences in the feedbacks can be traced back to the upgraded model processes in FGOALS-g3
Rain, Wind, and Dust Connections in the Sahel
-  25 January 2022
Key Points
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During the Sahelian rainy season, the intensity of the strongest wind speed is linked to the intensity of the cold pools
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Most of the strongest wind speed occur just before or just after a rain event starts leading to efficient and intense dust emission
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The highest dust concentration is recorded during May-June when the wind speed is the strongest and the vegetation cover is the lowest
Studies on the Competition Between Homogeneous and Heterogeneous Ice Nucleation in Cirrus Formation
-  25 January 2022
Key Points
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Competing ice nucleation involving liquid solution droplets and INPs occurs frequently in cirrus formation
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Even poor INPs influence cirrus formation for moderately high mean updraft speeds and low number concentrations
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Growth of ice crystals by water vapor deposition in low-temperature cirrus clouds needs further study
Changes in Great Plains Low‐Level Jet Structure and Associated Precipitation Over the 20th Century
-  25 January 2022
Key Points
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Great Plains low-level jets have decreased in frequency but increased in strength over the past century
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Decreases in jet precipitation explains 41%–44% of present-day May–September precipitation shortfalls relative to 1905–1937 norms
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Intensification of Pacific and Atlantic subtropical highs and enhanced Rockies ridging opposes localized drying in the jet response
Downscaling Hourly Air Temperature of WRF Simulations Over Complex Topography: A Case Study of Chongli District in Hebei Province, China
-  24 January 2022
Key Points
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A statistical downscaling scheme was designed for weather research and forecasting (WRF) simulations
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To downscale the hourly air temperature from 1-km spatial resolution to 30-m, up to 24 hr in advance in a mountainous area
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Compared to WRF simulation results, root-mean-square error (RMSE) and mean absolute error (MAE) of WRF-downscaled results decreased by 0.87°C and 0.71°C, respectively, at the automatic weather station (AWS) level
Marine Boundary Layer Decoupling and the Stable Isotopic Composition of Water Vapor
-  23 January 2022
Key Points
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Stable isotopes in water vapor from the Azores are affected by the degree of decoupling in the marine boundary layer
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A higher degree of decoupling is associated with reduced mixing with an isotopically depleted source
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Data are consistent with purely local sources of water vapor, with no large-scale transport or additional fractionation processes required
Observations indicate that clouds amplify mechanisms of Southern Ocean heat uptake
-  4 February 2022
Key Points
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Anomalously strong annual mean Southern Ocean heat uptake is mainly controlled by reduced ocean heat loss during winter
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Changes in clouds and their associated atmospheric states amplify ocean heat uptake by increasing downward longwave radiation at the surface
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More clouds are linked to a more stable atmosphere which increases ocean heat uptake by suppressing turbulent heat fluxes out of the surface
Summer Greenland Blocking Diversity and its Impact on the Surface Mass Balance of the Greenland Ice Sheet
-  3 February 2022
Key Points
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We identify three primary summer Greenland blocking types
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The orientation of each blocking type with respect to the ice sheet dictates surface response
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Omega blocks have undergone the greatest increase in frequency and produce more melt over northern Greenland than other types
Variability, Trend, and Extremes of the South American Vegetation‐Climate System: Results from a Coupled Regional Model
-  3 February 2022
Key Points
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A regional model performs well in simulating the vegetation-climate system in South America
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Both the vegetation productivity and water availability show a decreasing trend over the Amazonia and Nordeste
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Warming is a major cause for the recent trend, but multi-decadal variability also plays a role
Global evaluation of the Noah‐MP land surface model and suggestions for selecting parameterization schemes
-  3 February 2022
Key Points
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Performance of Noah-MP in simulating key landâ^’atmosphere variables was comprehensively evaluated at a global scale
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Main disagreements between Noah-MP and references occur in the tropical, polar, high-altitude, and hyperarid regions
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It is feasible to run Noah-MP with land-cover-specific combinations of parameterization schemes
The influence of precipitation phase changes on the recharge process of terrestrial water storage in the cold season over the Tibetan Plateau
-  3 February 2022
Key Points
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The TWS over the TP decreased faster in the cold season than in the warming season from 1979-2019
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Enhanced warming over the TP could cause a transition from snowfall to rainfall by increasing melting level heights
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The slow process associated with decreasing snowfall contributed more to the decreasing TWS recharge than did fast process during 1979-2019
Clear Air Turbulence observed across a tropopause fold over the Drake Passage – A Case Study
-  3 February 2022
Key Points
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moderate to severe clear air turbulence over Drake's Passage is analyzed from 10 Hz in situ observations from HALO aircraft research flight
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the source of the turbulence is the enhanced flow deformation and shear around a tropopause resulting from an eastward propagating polar low
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Spectral and structure function methods are applied to quantify eddy-dissipation rates, intermittency, and flow anisotropy during the event
A 50‐Year Tropical Cyclone Exposure Climatology in Southeast Asia
-  3 February 2022
Key Points
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Approximately half of all Western North Pacific tropical cyclones made landfall in Southeast Asia
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A northward shift of landfalling locations is found in all four agency best track records
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Landfalls are lower and shifted northwestward in El Niño, higher and more distributed in La Niña, and highest in Neutral years
A Source of WRF Simulation Error for the Early‐summer Warm‐sector Heavy Rainfall over South China Coast: Land‐sea Thermal Contrast in the Boundary Layer
-  2 February 2022
Key Points
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Multi-source observations show an overestimation of BL wind in WRF simulation of warm-sector heavy rainfall on South China coast (SCC)
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Better modeling the land/sea BL temperature enhances the BL wind convergence and reduces the underestimation of SCC rainfall at night
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Increasing the land surface friction could help little suppress the simulated biases in the onshore BL wind and the SCC heavy rainfall
Connecting the oxidative potential of fractionated particulate matter with chromophoric substances
-  2 February 2022
Key Points
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Oxidative potential can be used to detect the joint toxicity of PM
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Chromophoric substances were found to be the important contributors to OP of PM
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Light-absorbing organic aerosols can be applied to illustrate the possible toxicological mechanism of PM
Assessment of the precision of spectral model turbulence analysis techniques using direct numerical simulation data
-  2 February 2022
Key Points
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Accuracies of spectral model turbulence analysis techniques are evaluated using high resolution DNS data
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The Tatarskii model shows very accurate results if measured spectra resolve the viscous subrange for more than 2 decades
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The Heisenberg model yields less accurate results that are almost independent of measurement resolution
The Remarkably Strong Arctic Stratospheric Polar Vortex of Winter 2020: Links to Record‐Breaking Arctic Oscillation and Ozone Loss
- Journal of Geophysical Research: Atmospheres
-  18 October 2020
Development of an Updated Global Land In Situ‐Based Data Set of Temperature and Precipitation Extremes: HadEX3
- Journal of Geophysical Research: Atmospheres
-  2 July 2020
An Updated Assessment of Near‐Surface Temperature Change From 1850: The HadCRUT5 Data Set
- Journal of Geophysical Research: Atmospheres
-  15 December 2020
Multiscale Variability of Meiyu and Its Prediction: A New Review
- Journal of Geophysical Research: Atmospheres
-  1 March 2020
Stratospheric Injection of Massive Smoke Plume From Canadian Boreal Fires in 2017 as Seen by DSCOVR‐EPIC, CALIOP, and OMPS‐LP Observations
- Journal of Geophysical Research: Atmospheres
-  15 April 2020
The Southern Hemisphere Minor Sudden Stratospheric Warming in September 2019 and its Predictions in S2S Models
- Journal of Geophysical Research: Atmospheres
-  24 June 2020
Three Years of the Lightning Imaging Sensor Onboard the International Space Station: Expanded Global Coverage and Enhanced Applications
- Journal of Geophysical Research: Atmospheres
-  29 July 2020
Fifty Years of Research on the Madden‐Julian Oscillation: Recent Progress, Challenges, and Perspectives
- Journal of Geophysical Research: Atmospheres
-  6 July 2020
GEOS‐S2S Version 2: The GMAO High‐Resolution Coupled Model and Assimilation System for Seasonal Prediction
- Journal of Geophysical Research: Atmospheres
-  14 February 2020
Uncertainty in the Response of Sudden Stratospheric Warmings and Stratosphere‐Troposphere Coupling to Quadrupled CO2 Concentrations in CMIP6 Models
- Journal of Geophysical Research: Atmospheres
-  28 February 2020
Large daytime molecular chlorine missing source at a suburban site in East China
- Journal of Geophysical Research: Atmospheres
-  28 January 2022
A scheme to suppress spurious convection by assimilating the "zero" column maximum vertical velocity
- Journal of Geophysical Research: Atmospheres
-  25 January 2022
High resolution dynamical analysis of Volatile Organic Compounds (VOC) measurements during the BIO‐MAÏDO field campaign (Réunion Island, Indian Ocean)
- Journal of Geophysical Research: Atmospheres
-  29 January 2022
A post‐phaseout retrospective reassessment of the global methyl bromide budget
- Journal of Geophysical Research: Atmospheres
-  26 January 2022
Scaling law for boundary layer inner eyewall pumping in concentric eyewalls
- Journal of Geophysical Research: Atmospheres
-  27 January 2022
Evaluating the Nature and Extent of Changes to Climate Sensitivity Between FGOALS‐g2 and FGOALS‐g3
- Journal of Geophysical Research: Atmospheres
-  26 January 2022
Assessing the Modern Multi‐Decadal Scale Aridification Over the Northern China From a Historical Perspective
- Journal of Geophysical Research: Atmospheres
-  26 January 2022
The impacts of hydrometeors and water vapor in stratiform region on the evolutions of MCSs and embedded convective cells in a pre‐summer rainfall event over South China
- Journal of Geophysical Research: Atmospheres
-  24 January 2022
An Evaluation of Convection‐permitting Ensemble Simulations of Coastal Nocturnal Rainfall over South China during the Early‐Summer Rainy Season
- Journal of Geophysical Research: Atmospheres
-  18 January 2022
Moisture sources for precipitation associated with major hurricanes during 2017 in the North Atlantic basin
- Journal of Geophysical Research: Atmospheres
-  28 January 2022