Time Series of Near‐Inertial Gravity Wave Energy Fluxes: The Effect of a Strong Wind Event

Abstract

Internal gravity waves are disturbances that occur in the stratified ocean and can travel hundreds to thousands of kilometers away from their generation sites (e.g., Alford, 2003b). Internal wave breaking leads to turbulent diapycnal mixing, which plays an important role in different climate relevant processes, such as the transport of heat, freshwater, nutrients, pollutants, and dissolved gases (e.g., MacKinnon et al., 2017). Diapycnal mixing is thought to provide considerable energy to maintain the abyssal stratification and is a major driver of the global meridional overturning circulation (MOC) (Munk & Wunsch, 1998;Wunsch & Ferrari, 2004). It has been demonstrated that the global MOC is sensitive to the strength and spatial distribu-

Tropical Cyclones Related Wind Power on Oceanic Near‐Inertial Oscillations

“…Lob et al. (2021) also found that the energy flux during the storm event is about 7.5 times greater than the background energy flux. Therefore, TCs can be considered as a significant source of wind energy input, especially in TC‐prone regions.…”

“…The peak value of W contc in the western North Pacific is 1.5 mW/m 2 , which is approximately 10 times larger than the corresponding value of W climat in the same area, accounting for more than 90% of the relative contribution (W contr /W total ) of wind work on NIOs. Lob et al (2021) also found that the energy flux during the storm event is about 7.5 times greater than the background energy flux. Therefore, TCs can be considered as a significant source of wind energy input, especially in TC-prone regions.…”

“…Lob et al. (2021) found that the wind power on NIOs induced by a single TC, which lasted only 19 days, was equivalent to the background wind power on NIOs over a period of 150 days. Numerical models have also demonstrated a prominent local enhancement in the annually averaged wind power on NIOs along the track of TCs, reaching a maximum of 8 mW/m 2 , surpassing the annually averaged wind power induced by winter storms, which reaches a maximum of 5 mW/m 2 (Sun et al., 2021).…”

“…However, considering TCs as the most powerful atmospheric systems, capable of efficiently driving NIOs (D'Asaro et al, 1995;Zhang et al, 2020), they could significantly contribute to the wind power on NIOs (Boos et al, 2004;Chen et al, 2013;Emanuel, 2001). Lob et al (2021) found that the wind power on NIOs induced by a single TC, which lasted only 19 days, was equivalent to the background wind power on NIOs over a period of 150 days. Numerical models have also demonstrated a prominent local enhancement in the annually averaged…”