Insolation Control of Monsoons
					q Monsoon circulations exit on Earth because the land responds to seasonal changes in solar radiation more quickly than does the ocean. q Changes in insolation over orbital time scales have driven major changes in the strength of the summer monsoons. q Changes of 12% in the amount of insolation received at low latitudes have caused large changes in heating of tropical landmass and in the strength of summer monsoons at a cycle near 23,000  years in length.