It is one of the top ten scientific and technological progress projects in the ecological environment of the year, and research on the significant enhancement of warming and humidification in the northwest region in the past 40 years. And recently, in the northwest region, technology
The northwest region of China is located in the hinterland of the Eurasian continent, with a scarce source of water vapor and a dry climate. However, in recent years, there has been a significant increase in precipitation in the northwest, and the warming and humidification of the northwest is attracting high attention. At the 2022 Top 10 Scientific and Technological Progress Conference on China's Ecological Environment held in Beijing today, Zhang Qiang, a first level inspector and chief engineer of the Gansu Provincial Meteorological Bureau, served as one of the presenters and introduced relevant research.
Zhang Qiang introduced that when Shi Yafeng proposed the phenomenon of northwest warming and humidification in the early 21st century, the amplitude of humidification was relatively weak and the area of humidification was relatively small. Recent research has found that the trend of humidity in the northwest region has shown a non-linear enhancement in the past 40 years, and the amplitude has become quite significant. In the 30 years after 1990, the growth rate of precipitation was about three times that of the 30 years before 1990.
The study also found that the warming and humidification phenomenon in the northwest has shifted from the initial northwest western region to a continuous expansion towards the northwest eastern region. In the past 20 years, the range of humidity has expanded to the entire northwest region.
The view that the northwest may become Jiangnan or return to the Han and Tang dynasties due to warming and humidification is not scientific, according to reports. Zhang Qiang's team predicts that the warming and humidification in the northwest will continue to be maintained in the next 80 years. The warming trend is comparable to the current one, and the wetting trend will significantly slow down. By the end of the 21st century, it would be difficult to change the arid and semi-arid climate pattern in the northwest due to humidity, but warming has made it possible for the northwest to transition from a temperate zone to a warm temperate zone as a whole.
Research suggests that the current climate warming and humidification are driven by four factors: the superposition of multiple time scale upward channels, the synergistic effect of westerly circulation and East Asian monsoon circulation, the enhancement of vertical movement leading to improved precipitation efficiency and increased net water vapor flux, and the reduction of land surface evapotranspiration and water loss caused by water constraints.
According to the assessment, the current warming and humidification of the climate have basically not changed the climate pattern in the northwest, and it cannot change the arid and water scarce climate environment in the 21st century. However, warming and humidifying have improved the water cycle mechanism in the western northwest, increased the total amount of water resources, improved the ecological vegetation in the alpine regions, and increased extreme events such as rainstorm.
Event site.
Zhang Qiang's team suggests that a basic understanding of long-term drought and water shortage in the northwest should be established; Seize the opportunity of climate warming and humidification, strengthen ecological environment protection, adjust and optimize the agricultural industry structure; Enhance the monitoring, forecasting, and early warning capabilities of extreme weather and climate events; Strengthen the protection of ice and snow resources; Be proactive and enhance our ability to respond to future climate change and enhance risk prevention.
Today is World Environment Day. At the press conference held by the China Association for Science and Technology Ecological Environment Industry and Education Federation, nine other scientific and technological advancements were also released. They are: nitrogen and phosphorus retention effects in lakes and their internal circulation mechanisms; Research on Yangtze River Ecological Environment Protection and Restoration Technology and Management System and Application; Quantitative remote sensing of atmospheric aerosol optical components and research on their environmental and climatic effects; The contribution of Chinese ecosystem management to carbon neutrality; Key technologies and applications for collaborative carbon sequestration and emission reduction in soil heavy metal pollution control; The establishment and application of a technical system for designing and evaluating national biodiversity conservation objectives; Key technologies and applications for collaborative control of pollution and carbon reduction in the steel industry; Research on the Construction and Application of Modern Noise Control System in China; Methods and techniques for treating red tide with modified clay.
These developments reflect the forefront and latest developments in the field of ecological and environmental technology in China, encouraging scientific research in the field of ecological environment, leading technological innovation in the field of ecological environment, and providing scientific support for ecological environment protection and ecological civilization construction in China.
