Balloon Launch and Flight Operation from the Research Vessel Hakuho Maru for Stratospheric Air Sampling over the Eastern Pacific Equator

A balloon-borne cryogenic air sampling experiment was carried out over the ocean near the equator to elucidate the transport process of greenhouse gases in the stratosphere. Four air samplers were launched from the deck of the Research Vessel Hakuho Maru by four individual balloons. To realize a balloon launch from this vessel's narrow deck, a new launch method was developed, based on the conventional static launch method. After the balloon flight, each of the four samplers parachuted down to the sea and was recovered by the vessel itself. Details of this successful shipboard balloon operation, including the new launch method, are described.