[A-CG42] Projection and detection of global environmental change

[ACG42-11] Regime Shifts in Global Mean Temperature and the Role of Tropical Oceans

*Yoshida Ibuki¹, Yoshihiro Tachibana¹ (1.Faculity of Biorexources, Mie University)

Keywords:Regime Shift, Tropical Oceans

・Global average temperature is commonly used to assess climate change.
・Now that satellite data are abundant, global average temperature can be examined in much greater spatiotemporal detail.
・Using global average temparature, we defined a global regime shift in the atmosphere and investigated its characteristics.
・It was revealed that the ragime shift in temperature originates from the tropical oceans.
・This high-temperature anomaly spreads throughout the entire low-latitude troposphere due to vigorous convective activity.
・The mid-latitudes, also influenced by the oceans, contribute to the increase in global average temperature.
・Furthermore, through its association with the high-latitude stratosphere, it evolves into a powerful regime shift.