Simulating convergence of moist air masses.

Many parts of the world are experiencing water shortage. If one could use rain enhancement to grow plants in the desert and soak up carbon dioxide it could help reduce global warming and drought. After I sent out an idea on rain enhancement to the Australian Water Association they suggested I submit a paper of about 5000 words to them on it, so perhaps they see merit in the idea. The idea depends on the principle of narrow land masses that heat up during the day, causing air to converge from both sides, meet in the middle, and rise because of high pressure where they collide. Imagine high walls running parallel, about a kilometre apart that cross the narrow land mass. Now bend the parallel walls into a U with ends facing the most windy direction. The pressure at the U part will be high, simulating convergence of air. Place dark biochar on the ground between the walls so it heats up and heats the air. This U shaped apparatus could be built in areas like Cape Town where it is windy and it will simulate places like Florida where convergence causes heavy rain. It could be built cheaply with tall poles with fabric stretched between the poles. Sea breezes often have depth of only 300 metres or so, so 300 m high walls may suffice.
There is advantage with convergence of air masses over the usual sea breeze. With a sea breeze the cooler air from the sea lifts the drier hotter land air and when the drier land air rises clouds and rain can occur. With convergence of sea breezes moist sea air is forced to rise and the more moist air facilitates rain.