Yeongjun Ryu

Abstract The Great Atlantic Sargassum Belt first appeared in 2011 and quickly became the largest interconnected floating biome on Earth. In recent years, Sargassum stranding events have caused substantial ecological and socio-economic impacts in coastal communities. Sargassum requires both phosphorus (P) and nitrogen (N) for growth, yet the primary sources of these nutrients fuelling the extensive Sargassum blooms remain unclear.

1 Introduction Nitrous oxide (N2O) is a significant atmospheric greenhouse gas that responds to climate variation and is responsible for stratospheric ozone destruction (Prather et al., 2015).

Atmospheric nitrous oxide (N O) is a greenhouse gas and ozone-depleting substance whose emissions are substantially perturbed by current human activities. Although air trapped in polar ice cores can provide direct information about N O evolution, analytical precision was not previously sufficient for high temporal resolution studies. In this work, we present a highly improved analytical technique with which to study N O concentrations in ancient-air-trapped ice cores.