Abstract
The terrain effects of Qinling–Daba Mountains on reginal precipitation during a warm season were investigated in a two-month day-to-day experiment using the Weather Research and Forecasting (WRF) model. According to the results from the terrain sensitivity experiment with lowered mountains, Qinling–Daba Mountains have been found to have an obvious effect on both the spatial-temporal distribution and diurnal cycle of reginal precipitation from July to August in 2019, where the Qinling Mountains mainly enhanced the precipitation around 34° N, and the Daba Mountains mainly enhanced it around 32° N at the time period of early morning and midnight. Horizontal distribution of water vapor and convective available potential energy (CAPE), as well as cross section of vertical velocity of wind and potential temperature has been studied to examine the key mechanisms for these two mountains’ effect. The existence of Qinling Mountains intercepted transportation of water vapor from South to North in the lower troposphere to across 34° N and caused an obvious enhancement of CAPE in the neighborhood, while the Daba Mountains intercepted the northward water vapor transportation to across 32° N and caused an enhanced CAPE nearby. The time period of the influence is in a good accordance with the diurnal cycle. In the cross-section, the existence of Qinling Mountains and Daba Mountains are found to stimulate the upward motion and unstable environment effectively at around 34° N and 32° N, separately. As a result, the existence of the two mountains lead to a favorable environment in water vapor, thermodynamic, and dynamic conditions for this warm season precipitation.
Highlights
The Qinling Mountains and Daba Mountains (Qinling–Daba Mountains), located mainly in the Gansu, Shaanxi, Henan, Sichuan, and Hubei provinces and Chongqing Municipality in central China, are referred to as the division of geology, geochemistry, physical geography and geography between north China and south China [1], which has become the focus of many geologists of the world [2,3]
As more and more studies show that mountain terrain can change reginal precipitation cycles [8], there is an increasing concern about the terrain effects caused by the Qinling– Daba Mountains on the regional water–energy cycle in the warm season
There are quantitative differences between the Climate Prediction Center (CPC) precipitation and simulated precipitation, in both intensity and locations when examined in detail, especially in high-resolution domains (Figure 1b,c,e), when we focus on the precipitation near the Qinling–Daba Mountains
Summary
The Qinling Mountains and Daba Mountains (Qinling–Daba Mountains), located mainly in the Gansu, Shaanxi, Henan, Sichuan, and Hubei provinces and Chongqing Municipality in central China, are referred to as the division of geology, geochemistry, physical geography and geography between north China and south China [1], which has become the focus of many geologists of the world [2,3]. Large amounts of research have focused on the Tibetan Plateau [18,19,20,21,22], known as the Third Pole, whose huge terrain serve as a heat source that drives the South Asian summer monsoon and plays a significant role in determining the global water vapor and energy budget at the land-atmosphere interface, which in turn affects the nature of atmospheric circulation and even causes climate feedbacks in the long term.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
