Arid Zone Research ›› 2023, Vol. 40 ›› Issue (6): 885-895.doi: 10.13866/j.azr.2023.06.04

• Weather and Climate • Previous Articles     Next Articles

Atmospheric environmental capacity characteristics and influencing factors of Ningxia over the past 60 years

CUI Yang1,2(),WANG Dai1,2,GAO Ruina1,2,AN Xingqin3   

  1. 1. Key Laboratory for Meteorological Disaster Monitoring and Early Warning and Risk Management of Characteristic Agriculture in Arid Regions, CMA, Yinchuan 750002, Ningxia, China
    2. Ningxia Key Laboratory for Meteorological Disaster Prevention and Reduction, Yinchuan 750002, Ningxia, China
    3. Institute of Atmospheric Composition, Chinese Research Academy of Meteorological Sciences, Beijing 100081, China
  • Received:2022-10-31 Revised:2023-01-01 Online:2023-06-15 Published:2023-06-21

Abstract:

This study has aimed to evaluate the characteristics of the atmospheric environmental capacity and its influencing factors in Ningxia. The temporal and spatial distribution of the A value of the atmospheric environmental capacity and its main meteorological influencing factors were analyzed using daily fixed time historical observation data from meteorological stations between 1961 and 2018, based on the box model principle. The atmospheric environmental capacity in 2018 was also evaluated and zoned. The results showed that the A value of the atmospheric environmental capacity showed a decreasing trend in all seasons, with a rate of -0.47×104~-0.24×104 km2·(10a)-1. The annual average A value was largest in the summer, followed by the spring, and then autumn and winter. The monthly A value showed a single peak pattern, with a maximum in August and minimum in December. It was generally high in the south and low in the north in space, and influenced by the topography of Helan Mountain and Liupan Mountain, regional precipitation, and other climatic factors. The low value center for A was located in Yinchuan and Shizuishan City, while the high value center was located in the south of Guyuan City. Wind speed and mixed layer height changes had a significant influence on the interdecadal evolution trend of the atmospheric environmental capacity of A in the Ningxia Hui Autonomous Region. There were obvious seasonal and regional differences on the impacts of precipitation and wind speed. For example, wind speed had a greater contribution to the A value in spring in the north, and precipitation had a greater contribution to the A value in summer and autumn in the south. This was affected by high energy consuming industries such as metallurgy, thermal power, the chemical industry, and construction and vehicle emissions. Pingluo County and Litong District were the critical overload and overload areas for the SO2 and NOx atmospheric environments, and the counties south of Litong District were high bearing areas in Ningxia.

Key words: atmospheric environmental capacity, atmospheric environmental carrying capacity index, meteorological influence factors, remaining capacity, Ningxia