If the Himalayas suddenly turn into plains, what impact will it have on the climate in China and India?

If the Himalayas suddenly turn into plains, the climate in northwest China and the Qinghai-Tibet Plateau will gradually become warmer and wetter, and the landscape will gradually change to the south, while the climate characteristics of India with high temperatures throughout the year will decrease year by year. The summers are mild and rainy, and the winters are colder and snowier. All in all, changes in the altitude of the Himalayas have both advantages and disadvantages for the China-India region, but in any case, the altitude of the Himalayas will not change much in a short period of time.

The tall Himalayas block the warm and moist airflow from the Indian Ocean, making the climate in northwest China and the Qinghai-Tibet Plateau become dry and cold, and China's climate is able to show a rich and diversified trend. If there were no Himalayas, the warm and humid air currents from the Indian Ocean would drive straight in, affecting the atmospheric circulation in the Tibetan Plateau and the northwest region, making the local climate warmer and humid. Not only would there be many permanent rivers and lakes, but it would also increase biodiversity. , improve the climate environment, and have many animals and plants that are only found in warm and humid areas.

If there were no Himalayas, China would become a warm land without a harsh climate, and many of its geographical boundaries would have to be redrawn, such as precipitation contours. Among them, the area of ​​​​humid areas will expand, and the originally dry Gobi and land will be rejuvenated, forming spots of oases and water sources. The desert will also become a rare landscape, and land and other related resources will have to be re-divided. , many policies and decisions will also change accordingly and be adapted to local conditions.

If there were no Himalayas, the cold air and cold waves from the Arctic Ocean would rush in, making the already cold Indian winter worse, and the warm and humid air from the Indian Ocean would not climb up to form orographic rainfall in North India. , causing India to lose some precipitation. But the only benefit of the subsidence of the Himalayas to India is that it will alleviate the high temperature in India, and the local tropical climate will show a mild characteristic.