scholarly journals Description of Dust Emission Parameterization in CAS‐ESM2 and Its Simulation of Global Dust Cycle and East Asian Dust Events

2021 ◽  
Vol 13 (10) ◽  
Author(s):  
Chenglai Wu ◽  
Zhaohui Lin ◽  
Xiaohong Liu ◽  
Duoying Ji ◽  
He Zhang ◽  
...  
Keyword(s):  
East Asian ◽  
Dust Emission ◽  
Asian Dust ◽  
Dust Events

scholarly journals Performance of KMA-ADAM3 in Identifying Asian Dust Days over Northern China

Atmosphere ◽  
2020 ◽  
Vol 11 (6) ◽  
pp. 593
Author(s):  
Sang-Boom Ryoo ◽  
Jinwon Kim ◽  
Jeong Hoon Cho
Keyword(s):  
Dust Emission ◽  
Northern China ◽  
Asian Dust ◽  
Probability Of Detection ◽  
Soil Types ◽  
Dust Source ◽  
Aerosol Model ◽  
Dust Generation ◽  
Source Regions ◽  
Dust Events

Recently, the Korea Meteorological Administration developed Asian Dust Aerosol Model version 3 (ADAM3) by incorporating additional parameters into ADAM2, including anthropogenic particulate matter (PM) emissions, modification of dust generation by considering real-time surface vegetation, and assimilations of surface PM observations and satellite-measured aerosol optical depth. This study evaluates the performance of ADAM3 in identifying Asian dust days over the dust source regions in Northern China and their variations according to regions and soil types by comparing its performance with ADAM2 (from January to June of 2017). In all regions the performance of ADAM3 was markedly improved, especially for Northwestern China, where the threat score (TS) and the probability of detection (POD) improved from 5.4% and 5.5% to 30.4% and 34.4%, respectively. ADAM3 outperforms ADAM2 for all soil types, especially for the sand-type soil for which TS and POD are improved from 39.2.0% and 50.7% to 48.9% and 68.2%, respectively. Despite these improvements in regions and surface soil types, Asian dust emission formulas in ADAM3 need improvement for the loess-type soils to modulate the overestimation of Asian dust events related to anthropogenic emissions in the Huabei Plain and Manchuria.

A numerical study of the effect of frozen soil on dust emission during an East Asian dust event in December 2009

2013 ◽  
Vol 49 (1) ◽  
pp. 57-65 ◽  
Author(s):  
Jung-Yoon Kang ◽  
Taichu Y. Tanaka ◽  
Masao Mikami ◽  
Soon-Chang Yoon
Keyword(s):  
Numerical Study ◽  
East Asian ◽  
Dust Emission ◽  
Asian Dust ◽  
Frozen Soil ◽  
Dust Event

scholarly journals Impacts of climate and land cover variability and trends on springtime East Asian dust emission over 1982–2010: A modeling study

2021 ◽  
pp. 118348
Author(s):  
Amos P.K. Tai ◽  
Perry H.L. Ma ◽  
Yuk-Chun Chan ◽  
Ming-Keung Chow ◽  
David A. Ridley ◽  
...  
Keyword(s):  
Land Cover ◽  
East Asian ◽  
Dust Emission ◽  
Asian Dust ◽  
Modeling Study

scholarly journals Size-resolved atmospheric ice-nucleating particles during East Asian dust events

2021 ◽  
Vol 21 (5) ◽  
pp. 3491-3506
Author(s):  
Jingchuan Chen ◽  
Zhijun Wu ◽  
Jie Chen ◽  
Naama Reicher ◽  
Xin Fang ◽  
...  
Keyword(s):  
Particle Size ◽  
Mineral Dust ◽  
East Asian ◽  
Substantial Effect ◽  
Ice Nucleation ◽  
Asian Dust ◽  
Dust Particles ◽  
Significant Difference ◽  
Dust Events ◽  
Surface Ice

Abstract. Asian dust is an important source of atmospheric ice-nucleating particles (INPs). However, the freezing activity of airborne Asian dust, especially its sensitivity to particle size, is poorly understood. In this study we report the first INP measurement of size-resolved airborne mineral dust collected during East Asian dust events. The measured total INP concentrations in the immersion mode ranged from 10−2 to 102 L−1 in dust events at temperatures between −25 and −5 ∘C. The average contributions of heat-sensitive INPs at three temperatures, −10, −15, and −20 ∘C, were 81±12 %, 70±15 %, and 38±21 %, respectively, suggesting that proteinaceous biological materials have a substantial effect on the ice nucleation properties of Asian airborne mineral dust at high temperatures. The dust particles which originated from China's northwest deserts are more efficient INPs compared to those from northern regions. In general, there was no significant difference in the ice nucleation properties between East Asian dust particles and other regions in the world. An explicit size dependence of both INP concentration and surface ice-active-site density was observed. The nucleation efficiency of dust particles increased with increasing particle size, while the INP concentration first increased rapidly and then leveled, due to the significant decrease in the number concentration of larger particles. A new set of parameterizations for INP activity based on size-resolved nucleation properties of Asian mineral dust particles were developed over an extended temperature range (−35 to −6 ∘C). These size-dependent parameterizations require only particle size distribution as input and can be easily applied in models.

scholarly journals Size-Resolved Atmospheric Ice Nucleating Particles during East Asian Dust Events

2020 ◽  
Author(s):  
Jingchuan Chen ◽  
Zhijun Wu ◽  
Jie Chen ◽  
Naama Reicher ◽  
Xin Fang ◽  
...  
Keyword(s):  
Particle Size ◽  
Mineral Dust ◽  
East Asian ◽  
Substantial Effect ◽  
Ice Nucleation ◽  
Asian Dust ◽  
Dust Particles ◽  
Significant Difference ◽  
Dust Events ◽  
Surface Ice

Abstract. Asian dust is an important source of atmospheric ice nucleating particles (INPs). However, the freezing activity of airborne Asian dust, especially its sensitivity to particle size, is poorly understood. In this study we report the first INP measurement of size-resolved airborne mineral dust collected during East Asian dust events. The measured total INP concentrations in the immersion mode ranged from 10−2 to 102 L−1 in dust events at temperatures between −25 and −5 °C. The average contributions of heat-sensitive INPs at three temperatures, −10, −15, and −20 °C, were 81 ± 12 %, 70 ± 15 %, and 38 ± 21 %, respectively, suggesting that proteinaceous biological materials have a substantial effect on the ice nucleation properties of Asian atmospheric mineral dust at warm temperatures. The dust particles which originated from China's northwest deserts are more efficient INPs compared to those from northern regions. There was no significant difference in the ice nucleation properties between East Asian dust particles and other regions in the world. An explicit size dependence of both INP concentration and surface ice active density was observed. The nucleation efficiency of dust particles increased with increasing particle size, while the INP concentration first increased rapidly and then levelled, due to the significant decrease in the number concentration of larger particles. A new set of parameterizations for INP activity based on size-resolved nucleation properties of Asian mineral dust particles were developed over an extended temperature range (−35 ~ −6 °C). These size-dependent parameterizations require only particle size distributions as input, and can be easily applied in models.

scholarly journals Seasonal Asian Dust Forecasting Using GloSea5-ADAM

Atmosphere ◽  
2020 ◽  
Vol 11 (5) ◽  
pp. 526
Author(s):  
Sang-Boom Ryoo ◽  
Yun-Kyu Lim ◽  
Young-San Park
Keyword(s):  
South Korea ◽  
Dust Emission ◽  
Northeast Asia ◽  
Bare Soil ◽  
Asian Dust ◽  
Forecasting Model ◽  
Aerosol Model ◽  
Soil Fraction ◽  
Temporary Solution ◽  
Dust Events

The springtime dust events in Northeast Asia pose many economic, social, and health-related risks. Statistical models in the forecasting of seasonal dust events do not fully account for environmental variations in dust sources due to climate change. The Korea Meteorological Administration (KMA) recently developed the GloSea5-ADAM, a numerically based seasonal dust forecasting model, by incorporating the Asian Dust and Aerosol Model (ADAM)’s emission algorithm into Global Seasonal Forecasting Model version 5 (GloSea5). The performance of GloSea5 and GloSea5-ADAM in forecasting seasonal Asian dust events in source (China) and leeward (South Korea) regions was compared. The GloSea5-ADAM solved the limitations of GloSea5, which were mainly attributable to GloSea5′s low bare-soil fraction, and successfully simulated 2017 springtime dust emissions over Northeast Asia. The results show that GloSea5-ADAM’s 2017 and 2018 forecasts were consistent with surface PM10 mass concentrations observed in China and South Korea, while there was a large gap in 2019. This study shows that the geographical distribution and physical properties of soil in dust source regions are important. The GloSea5-ADAM model is only a temporary solution and is limited in its applicability to Northeast Asia; therefore, a globally applicable dust emission algorithm that considers a wide variety of soil properties must be developed.

scholarly journals An assessment of dust emission schemes in modeling east Asian dust storms

2006 ◽  
Vol 111 (D5) ◽  
Author(s):  
T. L. Zhao ◽  
S. L. Gong ◽  
X. Y. Zhang ◽  
A. Abdel-Mawgoud ◽  
Y. P. Shao
Keyword(s):  
East Asian ◽  
Dust Emission ◽  
Asian Dust ◽  
Dust Storms ◽  
Asian Dust Storms

scholarly journals Supplementary material to "Size-Resolved Atmospheric Ice Nucleating Particles during East Asian Dust Events"

2020 ◽  
Author(s):  
Jingchuan Chen ◽  
Zhijun Wu ◽  
Jie Chen ◽  
Naama Reicher ◽  
Xin Fang ◽  
...  
Keyword(s):  
East Asian ◽  
Asian Dust ◽  
Supplementary Material ◽  
Dust Events

Possible Explanation for Interannual Variations in Trans-Pacific Transport of East Asian Dust

2021 ◽  
Author(s):  
Mingxing Wang ◽  
Yiran Peng ◽  
Tianliang Zhao
Keyword(s):  
Pacific Ocean ◽  
North Pacific ◽  
Western North Pacific ◽  
East Asian ◽  
Dust Emission ◽  
Asian Dust ◽  
Dust Aerosol ◽  
Interannual Variations ◽  
Dust Source ◽  
Source Regions

<p>East Asian dust aerosols prevail during spring season and transport cross Pacific Ocean. Satellite retrieval data show that dust AOD in downwind plume region over Pacific is significantly high and extends northward and eastward in 2003 comparing to 2002. In this study, we investigate the possible mechanism behind the differences in dust plume over Pacific by analyzing aerosol observations from CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation) and MISR (Multi-angle Imaging SpectroRadiometer) satellite platforms and ERA-Interim reanalysis data of meteorological fields. Firstly, we derive dust aerosol optical depth (AOD) in spring of 2002 and 2003 from MISR data by referring to the climatological mass ratio of dust to total aerosol from CALIPSO aerosol retrievals during 2007-2016. Second, we illustrate the axis of dust plume over Pacific by mimicking the center-of-gravity method for dust distribution, which clearly demonstrates that the axis shifts more northward and eastward and dust AOD is noticeably higher in April to May of 2003 than 2002. Thirdly, we look into the relationships between dust AOD and meteorological fields. Our results show that stronger surface wind speed in Northwest China (the source regions of East Asian dust) leads to higher dust emission in spring of 2003 than 2002. The updraft velocity in dust source regions is also stronger in 2003, which favors the uplifting of emitted dust. The precipitation over Pacific shows similar pattern between 2002 and 2003, indicating that wet deposition of dust has similar impacts on the dust aerosol transported cross Pacific Ocean. Lastly, we found that stronger southerly wind prevails over western North Pacific in May of 2003 than 2002, where negative vorticity is observed and might be related to certain features of Rossby wave. It is likely responsible for the northward axis of dust plume over Pacific. Therefore we conclude that the stronger and more easterly extended dust plume over Pacific Ocean in 2003 is resulted from excessive dust emission and stronger uplift in dust source regions of East Asia. The stronger southerly winds cause to the further northward axis of dust plume over western North Pacific. In the current stage, we extend the above investigation for the past two decades, to explain the interannual variations of East Asian dust related to emission in source regions, Trans-Pacific transport, meteorological fields and climatic indices.</p>

scholarly journals New developments in the representation of Saharan dust sources in the aerosol–climate model ECHAM6-HAM2

2016 ◽  
Vol 9 (2) ◽  
pp. 765-777 ◽  
Author(s):  
Bernd Heinold ◽  
Ina Tegen ◽  
Kerstin Schepanski ◽  
Jamie R. Banks
Keyword(s):  
Climate Model ◽  
Dust Emission ◽  
Source Area ◽  
Saharan Dust ◽  
Moist Convection ◽  
Dust Source ◽  
New Developments ◽  
Infrared Imager ◽  
Dust Sources ◽  
Dust Events

Abstract. In the aerosol–climate model ECHAM6-HAM2, dust source activation (DSA) observations from Meteosat Second Generation (MSG) satellite are proposed to replace the original source area parameterization over the Sahara Desert. The new setup is tested in nudged simulations for the period 2007 to 2008. The evaluation is based on comparisons to dust emission events inferred from MSG dust index imagery, Aerosol Robotic Network (AERONET) sun photometer observations, and satellite retrievals of aerosol optical thickness (AOT).The model results agree well with AERONET measurements especially in terms of seasonal variability, and a good spatial correlation was found between model results and MSG-SEVIRI (Spinning-Enhanced Visible and InfraRed Imager) dust AOT as well as Multi-angle Imaging SpectroRadiometer (MISR) AOT. ECHAM6-HAM2 computes a more realistic geographical distribution and up to 20 % higher annual Saharan dust emissions, using the MSG-based source map. The representation of dust AOT is partly improved in the southern Sahara and Sahel. In addition, the spatial variability is increased towards a better agreement with observations depending on the season. Thus, using the MSG DSA map can help to circumvent the issue of uncertain soil input parameters.An important issue remains the need to improve the model representation of moist convection and stable nighttime conditions. Compared to sub-daily DSA information from MSG-SEVIRI and results from a regional model, ECHAM6-HAM2 notably underestimates the important fraction of morning dust events by the breakdown of the nocturnal low-level jet, while a major contribution is from afternoon-to-evening emissions.

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