Proxy evidence for an El Niño-like response to volcanic forcing.

摘要: Past studies have suggested a statistical connection between explosive volcanic eruptions and subsequent El Nino climate events. This connection, however, has remained controversial. Here we present support for response of the Nino/Southern Oscillation (ENSO) phenomenon to forcing from volcanism by using two different palaeoclimate reconstructions activity independent, proxy-based chronologies ad 1649 present. We demonstrate significant, multi-year, Nino-like tropical over past several centuries. The results imply roughly doubling probability an event occurring in winter following eruption. Our empirical findings shed light on how Pacific ocean-atmosphere system may respond exogenous (both natural anthropogenic) radiative forcing.