"Super Bomb Low Pressure" that occurred on January 2018, 1 in the eastern sea of the United States.It has developed so rapidly that it cannot be explained by the conventional theory of cyclone development, and as a result of storms and heavy snowfall, it has caused enormous human damage to more than 4 people and economic loss of about $ 20 billion.
The world's first elucidation of the developmental factors of this "super bomb low pressure" was announced by a joint research team of Rissho University, Kyushu University, Ocean Research and Development Organization, and Nagoya University.
In this research, a simulation that reproduces the detailed structure of a cyclone that develops on the ocean is simulated using the cloud resolution model "CReSS" developed by Nagoya University on the Japan Agency for Marine-Earth Science and Technology's supercomputer "Earth Simulator". carried out.As a result, it was found that when the cyclone developed rapidly, precipitation was locally intensified near the center of the cyclone.The research team analyzed this and found that the heat generated when a large amount of water vapor, which is the source of precipitation, condenses (condensation heat) heats the atmosphere and causes a decrease in atmospheric pressure, accelerating the development of low pressure. rice field.
Furthermore, it was discovered that the cause of the intensification of precipitation was the heat and water vapor released by the warm current and the Gulf Stream flowing off the east coast of the United States.In other words, the active heat and steam supply from the Gulf Stream promoted the generation of a large amount of coagulation heat near the center of the cyclone, leading to the rapid development of the "super-bomb low pressure".
The findings obtained this time are expected to contribute to improving weather forecasts and improving understanding of the effects of global warming on explosive cyclogenesis.In addition, since a bomb low pressure system will occur around Japan where the Kuroshio Current flows, it will be useful information for understanding the bomb low pressure system near Japan.
Paper information:[Geophysical Research Letters] Significant impact of heat supply from the Gulf Stream on a “super bomb” cyclone in January 2018
