Analysis of the severe group dust storms in eastern part of Northwest China

2002 ◽  
Vol 12 (3) ◽  
pp. 357-362 ◽  
Author(s):  
Zhou Zijiang ◽  
Wang Xiwen
Keyword(s):  
Northwest China ◽  
Dust Storms ◽  
Severe Group

An observational study of aerosol and turbulence properties during dust storms in northwest China

2012 ◽  
Vol 117 (D9) ◽  
pp. n/a-n/a ◽  
Author(s):  
Peijian Fu ◽  
Shiyuan Zhong ◽  
Jianping Huang ◽  
Guangning Song
Keyword(s):  
Observational Study ◽  
Northwest China ◽  
Dust Storms

scholarly journals Aeolian particle transport inferred using a ~150-year sediment record from Sayram Lake, arid northwest China

2015 ◽  
Author(s):  
Long Ma ◽  
Jinglu Wu ◽  
Jilili Abuduwaili ◽  
Wen Liu
Keyword(s):  
Sediment Cores ◽  
Northwest China ◽  
Tianshan Mountains ◽  
Transport Processes ◽  
Dust Storms ◽  
Surface Erosion ◽  
Sediment Record ◽  
Aeolian Transport ◽  
End Members ◽  
The Impact

<p>We studied sediment cores from Sayram Lake in the Tianshan Mountains of northwest China to evaluate variations in aeolian transport processes over the past ~150 years. Using an end-member modeling algorithm of particle size data, we interpreted end members with a strong bimodal distribution as having been transported by aeolian processes, whereas other end members were interpreted to have been transported by fluvial processes. The aeolian fraction accounted for an average of 27% of the terrigenous components in the core. We used the ratio of aeolian to fluvial content in the Sayram Lake sediments as an index of past intensity of aeolian transport in the Tianshan Mountains. During the interval 1910-1930, the index was high, reflecting the fact that dry climate provided optimal conditions for aeolian dust transport. From 1930-1980, the intensity of aeolian transport was weak. From the 1980s to the 2000s, aeolian transport to Sayram Lake increased. Although climate in northwest China became more humid in the mid-1980s, human activity had by that time altered the impact of climate on the landscape, leading to enhanced surface erosion, which provided more transportable material for dust storms. Comparison of the Lake Sayram sediment record with sediment records from other lakes in the region indicates synchronous intervals of enhanced aeolian transport from 1910 to 1930 and 1980 to 2000.</p>

Application of artificial neural networks to the prediction of dust storms in Northwest China

2006 ◽  
Vol 52 (1-4) ◽  
pp. 216-224 ◽  
Author(s):  
Mei Huang ◽  
Gongbing Peng ◽  
Jiashen Zhang ◽  
Shihuang Zhang
Keyword(s):  
Neural Networks ◽  
Artificial Neural Networks ◽  
Northwest China ◽  
Dust Storms ◽  
Artificial Neural

scholarly journals Culturable bacteria in Himalayan ice in response to atmospheric circulation

2006 ◽  
Vol 3 (3) ◽  
pp. 765-778 ◽  
Author(s):  
S. Zhang ◽  
S. Hou ◽  
X. Ma ◽  
D. Qin ◽  
T. Chen
Keyword(s):  
Atmospheric Circulation ◽  
Monsoon Season ◽  
Ice Core ◽  
Northwest China ◽  
Dust Storms ◽  
Culturable Bacteria ◽  
High Concentration ◽  
Glacial Ice ◽  
Air Masses ◽  
Marine Air

Abstract. Only recently has specific attention been given to culturable bacteria in Tibetan glaciers, but their relation to atmospheric circulation is less understood yet. Here we investigate the seasonal variation of culturable bacteria preserved in a Himalayan ice core. High concentration of culturable bacteria in glacial ice deposited during the pre-monsoon season is attributed to the transportation of continental dust stirred up by the frequent dust storms in Northwest China during spring. This is also confirmed by the spatial distribution of culturable bacteria in Tibetan glaciers. Culturable bacteria deposited during monsoon season are more diverse than other seasons because they derive from both marine air masses and local or regional continental sources. We suggest that microorganisms in Himalayan ice can be used to reconstruct atmospheric circulation.

scholarly journals Detection of a Dust Storm in 2020 by a Multi-Observation Platform over the Northwest China

2021 ◽  
Vol 13 (6) ◽  
pp. 1056
Author(s):  
Lili Yang ◽  
Zhiyuan Hu ◽  
Zhongwei Huang ◽  
Lina Wang ◽  
Wenyu Han ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Dust Storm ◽  
Northwest China ◽  
Dust Storms ◽  
Spherical Particles ◽  
Dust Particles ◽  
Storm Event ◽  
Weather System ◽  
Analytical Instruments ◽  
Wide Range

Dust storms have occurred frequently in northwest China and can dramatically reduce visibility and exacerbate air quality in downwind regions through long-range transport. In order to study the distribution characteristics of dust particles sizes, structures and concentrations in the process of dust storm, especially for the vertical distributions, the multi-observation platform composed of six Lidars and nine aerosol analytical instruments is first used to detect a severe dust storm event, which occurred in Northwest China on 3 May 2020. As a strong weather system process, the dust storm has achieved high intensity and wide range. When the intensity of a dust storm is at its strongest, the ratios of PM2.5 (particulate matter with diameter < 2.5 µm) and PM10 (particulate matter with diameter < 10 µm) (PM2.5/PM10) in cities examined were less than 0.2 and the extinction coefficients became greater than 1 km−1 based on Lidar observations. In addition, the growth rates of PM2.5 were higher than that of PM10. The dust particles mainly concentrated at heights of 2 km, after being transported about 200–300 km, vertical height increased by 1–2 km. Meanwhile, the dust concentration decreased markedly. Furthermore, the depolarization ratio showed that dust in the Tengger Desert was dominated by spherical particles. The linear relationships between 532 nm extinction coefficient and the concentration of PM2.5 and PM10 were found firstly and their R2 were 0.706 to 0.987. Our results could give more information for the physical schemes to simulate dust storms in specific models, which could improve the forecast of dust storms.

scholarly journals Increasing spring dust storms in the future over the Taklimakan Desert, Northwest China: implications from changes in circulation pattern frequency in CMIP6

2021 ◽  
Author(s):  
Rui Mao ◽  
Dao-Yi Gong ◽  
Seong-Joong Kim ◽  
Qi Zong ◽  
Xingya Feng ◽  
...  
Keyword(s):  
Circulation Pattern ◽  
Northwest China ◽  
Dust Storms ◽  
Cmip5 Models ◽  
Taklimakan Desert ◽  
Dust Emissions ◽  
Warming Scenario ◽  
Pattern Frequency ◽  
Circulation Patterns ◽  
The Future

Abstract Dust storms over the Taklimakan Desert (TD), Northwest China, not only influence human health but also affect regional climate through direct effects of dust aerosols on solar and longwave radiation. The Coupled Model Intercomparisons Project Phase 5 (CMIP5) models project a decrease in dust storms because of a decrease in dust emissions over the TD in the future under warming scenarios. However, inaccurate simulations of dust emissions cause the CMIP5 models to simulate dust storms poorly. Here we analyzed typical circulation patterns that initiate dust storms over the TD and examined changes in the frequency of typical circulation patterns derived from the CMIP6 models in an extreme warming scenario. The results show that there will be an increase in typical circulation pattern frequency in the latter half of the 21st century compared with 1958-2014, implying an increase in dust storms over the TD in the future under the extreme warming scenario. The increase in dust storms over the TD may be related to an increase in synoptic activities in the future from the Middle Asia to the TD, which is caused by a southern movement of subtropical westerly jet stream under the extreme warming scenario.

The properties of dust aerosol and reducing tendency of the dust storms in northwest China

2008 ◽  
Vol 42 (23) ◽  
pp. 5896-5904 ◽  
Author(s):  
Peijian Fu ◽  
Jianping Huang ◽  
Chunwei Li ◽  
Sharon Zhong
Keyword(s):  
Northwest China ◽  
Dust Storms ◽  
Dust Aerosol
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