资源环境科技发展态势分析平台

The 2015/16 super El Niño event resulted in a positive precipitation anomaly during dry seasons in the Jiulong River watershed, southeast China. Four years (2014‐17) of high frequency, in situ humic‐like fluorescent DOM (FDOM_H) data in the Jiulong Estuary was coupled with extrapolation to a freshwater endmember FDOM_H concentration and river discharge data to estimate riverine FDOM_H export. The wetter El Niño dry season was followed by lower FDOM_H export during the subsequent wet season. Furthermore, in the dry season after El Niño reached its strongest phase, a 90‐187% increase in FDOM_H export occurred. If widespread, this pattern suggests El Niño events may enhance export of FDOM_H from south China rivers in dry seasons resulting in seasonal and annual shunting of the terrestrial DOM export, modulating coastal carbon cycling. This study highlights the need to incorporate climate‐driven regulation patterns on DOM transport across the land‐ocean interface.