Fig. 3.

Lower Yangtze basin, 1930–2006: normalized records for GDP (1950–2000), population, arable land (Chinese unit mu), annual T (°C) and annual P (mm) with normalized RS index (Fig. 3), and RS per capita and RS per arable land area indexes. Vertical bars show major 20th–21st century political events (from left to right): People's Republic of China founded by Mao Zedong, 1949; Great Leap Forward, 1958–1961; Cultural Revolution, 1966–1976; Deng Xiaoping's economic reforms late 1970s to early 1980s; leadership of Jiang Zemin from 1989; and leadership of Hu Jintao from 2003.