Subjects: Biology >> Botany >> Applied botany submitted time 2024-05-15 Cooperative journals: 《广西植物》
Abstract： Bsang is a folk activity with unique ethnic cultural characteristics on the Qinghai-Tibet Plateau (QTP), and it plays an important role in the daily life of Zang people. There are abundant bsang plant resources and related bsang cultural knowledge on the QTP, to investigate, document, and research Xizang bsang plants and related traditional knowledge, the research team conducted four ethnobotanical surveys on bsang plants in Xizang. Interviews were conducted with 459 informants from 22 townships, documenting 83 species of bsang plants belonging to 36 genera across 19 families. The results were as follows: (1) People of different regions, ages, and genders possess extensive knowledge of bsang plants; (2) Hordeum vulgare var. coeleste, Juniperus indica, Rhododendron anthopogon and have high cultural value (CV) indices, making them crucial in bsang activities; (3) The utilization of bsang plants demonstrates regional and substitutive characteristics, reflecting the local practices of scientifically managing and sustainably collecting of bsang plant resources. This study contributes to the inheritance of bsang activities and the biodiversity conservation and sustainable utilization of bsang plant resources.
Subjects: Geosciences >> Atmospheric Sciences submitted time 2023-08-25 Cooperative journals: 《干旱区研究》
Abstract： The Sahara region of northern Africa is seriously affected by drought and desertification, and eoliandust activity disasters are considered severe. The arid and semi-arid regions of Egypt in northern Africa were thefocus of this study. Based on daily observation data from meteorological stations between 1990 and 2020, and thedata obtained from satellite remote sensing products, the spatiotemporal variability characteristics of eolian dustactivity disasters in Egypt and their possible associations were assessed. The main influencing factors of eoliandust activity disasters were further discussed. The frequency of eolian dust activities in Egypt varied from 20 to65 d·a− 1 over the past 30 years, showing an overall declining trend with fluctuations. The annual average totalsuspended particulate (TSP) concentration in Egypt fluctuates was 400-1200 μg·mg− 3 and showed an overalldecreasing trend over the past 30 years. The highest TSP concentration occurred during spring in Egypt andreached over 2300 μg·m− 3. Eolian dust activity in Egypt has a high intensity level when compared to other aridand semi- arid regions of the world; Egypt has the highest frequency of blowing dust, followed by dust insuspension, dust storm, and severe dust storm. The blowing dust that occurs in spring and summer accounts formore than 60% of the total eolian dust weather throughout the year. Ambient TSP concentrations in Egypt arehighly correlated with the frequency of eolian dust activity due to wind erosion; There has been a deceasing trendin surface wind speed over the past 30 years, and wind erosion is an important factor affecting air quality in theoasis areas. The frequency of eolian dust activity is significantly negatively correlated with the Atlanticmultidecadal oscillation with a correlation coefficient of − 0.67. This work provides theoretical basis and datasupport for a comprehensive understanding of the spatial-temporal characteristics of eolian dust weather in Egypt,North Africa, and the prevention of dust storm disasters.
Subjects: Geosciences >> Atmospheric Sciences submitted time 2023-05-30 Cooperative journals: 《干旱区研究》
Abstract： An unusual winter synoptic process of mixed rain and snow with strong airborne dustfall occurred in Xinjiang, northwestern China from November 30 to December 3, 2018. Based on the meteorological records, environmental monitoring data, and continuous atmospheric dustfall observations, we analyzed the characteristics of the air pollutants during the synoptic process and studied their impact on the environment. The results showed that, during this anomalous synoptic process, >90% of the oasis cities in Xinjiang Province, China were affected by the atmospheric particulate pollution. The inhalable particulate matter comprised mostly coarse particles. This abnormal synoptic process caused the concentration of particulate matter to rapidly rise with PM10 (particulate matter with aerodynamic diameter ≤10 μm) concentration in Xinjiang reaching a maximum of 4745 μg·m-3. The occurrence of strong winds in the Xinjiang cities was highly positively correlated with the elevated PM10 concentration and air quality index. This synoptic process resulted in a total atmospheric dust deposition of approximately 0.9- 1.52 million tons in the provincial capital city of Urumqi. The average airborne dustfall intensity in Urumqi was 85 g·m-2, exceeding the city’s annual average by 60%. This anomalous winter rain and snow mixed with eolian dust caused severe pollution of the atmosphere as well as intense atmospheric dustfall. Under the action of atmospheric circulation with jet streams, enormous amounts of particulates were transported to the oasis areas, seriously deteriorating the quality of the atmosphere in the urban environment. The Taklamakan Desert is the main pollution source for these strong winter dustfall events in Xinjiang, northwestern China.
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