NTT and the Okinawa Institute of Science and Technology Graduate University (OIST) have signed a joint research agreement with the Meteorological Research Institute of the Japan Meteorological Agency(JMA) to conduct atmospheric and oceanic observations to clarify the atmospheric and oceanic mechanisms related to extreme weather such as linear precipitation bands and typhoons.

In order to clarify the occurrence and development mechanism of extreme weather such as linear precipitation bands and typhoons, the joint research will carry out on-site observations using autonomous unmanned marine observation devices and observation buoys that are adjusted to collect observation data on marine weather and the ocean surface in typhoon areas during the flood season when extreme weather such as linear precipitation bands and typhoons occur. In addition, by utilizing the collected observation data, we will focus on elucidating the atmospheric and oceanic mechanisms related to extreme weather such as linear precipitation bands and typhoons.

In order to understand the actual situation and mechanisms of linear precipitation bands and typhoons and the remarkable phenomena that accompany them, the key is to understand the role of the ocean in the remarkable phenomena by directly observing water vapor and seawater temperature in the lower atmosphere over the ocean, where data is scarce. The forms of notable phenomena associated with linear precipitation bands and typhoons are extremely diverse, and the locations of occurrence, causes, and typhoon paths vary from case to case, so it is necessary to collect and analyze observation data from many cases. For this reason, observation research will be conducted over a four-year period starting in FY2025, with the observation area and analysis targets being expanded step by step each year.

From FY2025 to FY2026, the “Linear Precipitation Band/Typhoon Ocean Surface Observation Demonstration” will be conducted, and observation data will be collected using autonomous unmanned marine observation devices and observation buoys. Next, from FY2015 onwards, the observation targets for linear precipitation bands and typhoons will be expanded from the ocean surface to the ocean atmosphere (from the sea surface to the lower troposphere), and observation data will be collected using atmospheric observation sensors, etc., in the “Linear Precipitation Band/Typhoon Ocean Atmosphere Observation Demonstration.”

As for elucidating the atmospheric and oceanic mechanisms, the analysis will be conducted step by step to promote research to improve prediction technology.

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