Temporal Variation of Airborne Dust Concentrations in the Mogao Grottoes, Dunhuang, China
Temporal Variation of Airborne Dust Concentrations in the Mogao Grottoes, Dunhuang, China
复制标题
中国敦煌莫高窟空气中粉尘浓度的时间变化
DOI：
10.3389/fenvs.2022.878466
复制
发表时间：
2022-04
影响因子：
4.6
通讯作者：
Fei Qiu
中科院分区：
文献类型：
--
作者：
Guobin Zhang;Lihai Tan;Weimin Zhang;Hongtao Zhan;Fei Qiu
沙尘暴从地球干旱和半干旱地区带来大量沙尘气溶胶。然而，对于风蚀研究很重要的干旱地区沙尘暴的实时沙尘浓度数据仍然有限。本文对2012年2月至10月监测期间西北莫高窟沙尘浓度的时间变化以及不同风向下的典型沙尘暴进行了分析。结果显示，2月至10月，月均总悬浮颗粒物（TSP）、小于10微米颗粒物（PM10）、小于2.5微米颗粒物（PM2.5）浓度逐渐下降。日均沙尘浓度随日波动，极值主要出现在2月、3月、4月。日均PM10/TSP比值范围为0.67至0.98（平均值为0.82），PM2.5/PM10比值范围为0.31至0.73（平均值为0.55），表明PM10在TSP中占主导地位。在典型沙尘暴中，最大实时浓度可达16、000~21、000μg TSP m−3、∼11、000μg PM10 m−3、3000~3500μg PM2.5 m−3，极端实时粉尘浓度为50358.03μg TSP m−3、33100.86μg记录了 PM10m−3 和 7502.59μg PM2.5m−3。气候干燥、风季恰逢，加上周围环境沙源充足，导致莫高窟沙尘浓度较高。为了最大限度地减少扬尘对壁画和雕像的损害，建议建立沙尘暴预警系统并完善现有的防沙系统。
Dust storms bring a large quantity of dust aerosols from arid and semi-arid regions of the Earth. However, real-time dust concentration data for dust storms in arid regions, important for wind erosion studies, are still limited. Here, temporal variation of airborne dust concentrations in the Mogao Grottoes, Northwest China, during the monitoring period from February to October 2012 and typical dust storms under different wind directions were analyzed. Results reveal that the monthly mean total suspended particle (TSP), particulate matter less than 10μm (PM10), and particulate matter less than 2.5μm (PM2.5) concentrations gradually decreased from February to October. The daily mean dust concentrations fluctuated with the day, with extreme values occurring mainly on February, March, and April. The daily mean PM10/TSP ratio ranged from 0.67 to 0.98 (mean of 0.82), and the PM2.5/PM10 ratio ranged from 0.31 to 0.73 (mean of 0.55), indicating PM10 dominated in TSP. In typical dust storms, the maximum real-time concentrations can reach 16, 000–21, 000μg TSP m−3, ∼11, 000μg PM10 m−3, and 3000–3500μg PM2.5 m−3, and extreme real-time dust concentrations of 50358.03μg TSP m−3, 33100.86μg PM10m−3, and 7502.59μg PM2.5m−3 were recorded. Coincidence of the dry climate and windy season and sufficient dust sources in the surrounding environment contributed to the high dust concentrations in the Mogao Grottoes. To achieve the goal of minimizing the damage of falling dust to the murals and statues, establishing a dust storm early warning system and improving the existing sand control system are recommended.
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DOI：
10.1016/j.jweia.2011.06.007
发表时间：
2011-08-01
影响因子：
4.8
作者：
Liu, Benli;Qu, Jianjun;Qian, Guangqiang
通讯作者：
Qian, Guangqiang
DOI：
--
发表时间：
2010
期刊：
--
影响因子：
--
作者：
W. Xiu
通讯作者：
W. Xiu
DOI：
--
发表时间：
2010
期刊：
--
影响因子：
--
作者：
Li Guanglin
通讯作者：
Li Guanglin
影响因子：
4.5
作者：
R. D. Behrooz;A. Esmaili-Sari;N. Bahramifar;D. Kaskaoutis
通讯作者：
R. D. Behrooz;A. Esmaili-Sari;N. Bahramifar;D. Kaskaoutis
影响因子：
5
作者：
J. Gillies;W. Nickling;G. McTainsh
通讯作者：
J. Gillies;W. Nickling;G. McTainsh