Contributions of dusty weather and dust devil to dust emission amounts at the northern margin of the Taklimakan Desert

Ma, Mingjie; Yang, Xinghua; Zhou, Chenglong; He, Qing; Mamtimin, Ali

doi:10.1007/s11069-020-04043-3

Cited by 10 publications

(10 citation statements)

References 22 publications

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“…Therefore, the tendency of peak shifts in the 1990s images might be contrary to the overall trend. Ma et al (2020) presented the single-peaked distribution of monthly changes in dust emissions with a peak in July at the northern margin of the TD, while Han et al (2016) gave the monthly changes of dust devil frequency in the northwestern China with two peaks in March and June because the dust devil frequency in April was low due to strong winds. In deserts like the TD, GD, dust devil started to increase at 1100 LT while in basin like the TK and TB, the frequency of dust devils was high from 1000 LT onwards.…”

Section: Variation Of Dust Devils In East Asiamentioning

confidence: 99%

“…Han et al (2016) estimated that dust devils contributed 53% to total annual desert dust in the western China based on satellite and Lidar observations. By combining observed meteorological data and estimation model, Ma et al (2020) gave an estimate of 46.5% for the same region. Therefore, there is still large uncertainty about the impacts due to the complexity of dust devils and the lack of knowledge of their characteristics in different regions.…”

Section: Introductionmentioning

confidence: 99%

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Long-term Variation of Dust Devils in East Asia during 1959-2021

Huang

Tang

et al. 2022

Preprint

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Dust devils play an important role in dust transport by carrying it from surface into the atmosphere, especially in summer. However, information on how dust devil changed in the past decades and what caused these changes remains lacking. Based on thermodynamic criterion and ERA5 reanalysis dataset, this study investigated long-term variation of dust devil in East Asia over the past 60 years. We found the annual mean frequency of dust devil in East Asia was approximately 8.2×10 5 hours for 1959 to 2021. In particular, it is shown that an overall downward trend in dust devil frequency over the study period in East Asia, among which strong dust devils declined significantly at the fastest rate while the weak ones dropped insignificantly. Moreover, dust devil frequency in the Gobi Desert (GD) increased obviously but they decreased in the Taklimakan Desert (TD). It is represented that there was a peak for monthly variation of dust devil, shifting from June to July, over the past decades. For the diurnal changes, dust devils mainly occurred between 10:00 and 16:00 at Local Time (LT), with over 60% of them happening between 12:00 LT and 14:00 LT. We also found a negative correlation between precipitation and dust devil frequency. This study provides a comprehensive understanding of dust devils in East Asia over the past decades, which is of great importance to further evaluate its impact on climate, environment as well as ecosystem.

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Section: Variation Of Dust Devils In East Asiamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Long-term Variation of Dust Devils in East Asia during 1959-2021

Huang

Tang

et al. 2022

Preprint

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show abstract

“…By combining observed meteorological data and estimation model, Ma et al. (2020) gave an estimate of 46.5% for the same region. Therefore, there is still large uncertainty about the impacts due to the complexity of dust devils and the lack of knowledge of their characteristics in different regions.…”

Section: Introductionmentioning

confidence: 99%

Long‐Term Variation of Dust Devils in East Asia During 1959–2021

Huang

Tang

et al. 2023

JGR Atmospheres

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Dust devils play an important role in dust transport by carrying it from the surface into the atmosphere, especially in summer. However, information on how dust devils changed in the past decades and what caused these changes remains lacking. Based on thermodynamic criteria and ERA5 reanalysis data set, this study investigated the long‐term variation of favorable conditions for dust devil occurrence in East Asia over the past 63 years and defined it as potential dust devil and dusty plume (PDDP) occurrence in hours. Annual mean frequency of PDDP in East Asia was approximately 217.2 hr from 1959 to 2021. An overall downward trend in PDDP frequency has been found over 63 years in East Asia among which strong PDDPs drop significantly at the fastest rate while the weak ones dropped insignificantly. Moreover, PDDP frequency in the Gobi Desert increased but they decreased in the Taklimakan Desert. The monthly variation of PDDP shows a single‐peak structure with a tendency for the peak to move from June to July. For the diurnal changes, PDDP mainly occurred between 10:00 and 16:00 at local time (LT), with over 60% of them happening between 12:00 LT and 14:00 LT. We also found a negative correlation between precipitation and PDDP occurrence. This study provides a comprehensive understanding of favorable conditions for dust devil occurrence in East Asia over the past decades, which is of great importance to further evaluate its impact on climate, environment as well as ecosystem.

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“…Then they can be transported horizontally to regions far downwind from the Asian continent to the West Pacific by westerlies (Wang et al, 2010;Hu et al, 2020). The Taklimakan Desert is an important source of dust that affects much of Eastern Asia, and is also considered as the dust sediment source for the North Pacific and even North America (Liu et al, 2019;Yasukawa et al, 2019;Chen et al, 2020;Ma et al, 2020). Therefore, the dust of Xinjiang has drawn much attention from researchers all over the world.…”

Section: Introductionmentioning

confidence: 99%

The Temporal-Spatial Variations and Potential Causes of Dust Events in Xinjiang Basin During 1960–2015

Jing

et al. 2021

Front. Environ. Sci.

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Dust events not only cause local ecosystem degradation and desertification, but also have profound impacts on regional and global climate system, as well as air quality and human health. Dust events in Xinjiang Basin, as the important dust source of Eastern Asia, have undergone a significant change under the global warming background and may be in a new active period after 2000, which is worthy of study. This study provides the temporal and spatial variations of dust events in the Xinjiang Basin based on surface meteorological station observation data during 1960–2015. The results show that Southern Xinjiang is the main dust occurrence region where dust events are significantly more than that in the Northern Xinjiang, and each year more than 73% of dust events occurred in spring and summer. The dust index (DI), which is defined to represent the large-scale variation of dust event, shows a significant downward trend during the past 56 years with a linear decreasing rate −8.2 years−1 in Southern Xinjiang. The DI is positively correlated to surface wind speed with a mean correlation coefficient of 0.79. The declining trend of surface wind speed could explain dust events variation during 1960–2000. But in the new active period after 2000, the increase of DI is not consistent with the rising wind speed with the correlation coefficient decreasing to 0.34. It is found that, compared with 1960–1999, the average annual precipitation and frequency increased by 17.4 and 13% during 2000–2015, respectively, and the NDVI also increased at the same time, which indicates that the surface condition changes induced by the increase of precipitation might suppress the occurrence of dust. Moreover, the analysis of high-altitude wind field shows that the variation of the East Asian general circulation’s intensity, dominating the upper-level wind fields in the Xinjiang basin, will change the surface wind speed and precipitation, and further affect the occurrence of dust events.

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Contributions of dusty weather and dust devil to dust emission amounts at the northern margin of the Taklimakan Desert

Cited by 10 publications

References 22 publications

Long-term Variation of Dust Devils in East Asia during 1959-2021

Long-term Variation of Dust Devils in East Asia during 1959-2021

Long‐Term Variation of Dust Devils in East Asia During 1959–2021

The Temporal-Spatial Variations and Potential Causes of Dust Events in Xinjiang Basin During 1960–2015

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