Dr. Roberts follows up on Provocation #144 to look at recent research around El Niño. Walter Orr Roberts informal series, "Provocations." Each issue consists of provocative comments related to scientific issues that mostly focus on weather, climate, the sun, or near space, with the aim of creatin... Show moreDr. Roberts follows up on Provocation #144 to look at recent research around El Niño. Walter Orr Roberts informal series, "Provocations." Each issue consists of provocative comments related to scientific issues that mostly focus on weather, climate, the sun, or near space, with the aim of creating a forum for discussion. Show less