Understanding and Forecasting High-Impact Phenomena in the Atmosphere and Ocean

21 Chapter 1 Earth Science In order to pursue better understandings and predictions of high-impact phenomena in the atmosphere and ocean mainly at mid-latitudes, we conducted simulations of a typhoon and a tornado, predictability studies of precipitation in the Sahel and the Kuroshio Extension jet, and a global atmospheric data assimilation experiment with local ensemble transform Kalman filter during fiscal year 2006.