thermal gradient energy

The CMB is not only the medium transferring thermal energy from core to mantle, but also the region in which the temperature and temperature gradient is the highest in the whole mantle.

地幔底层是地核热能向地幔传播的必经之路，也是地幔中温度和温度梯度最高的地区。

The estimated reserves of various ocean energy sources in our country, such as tide, wave, current, tidal current, ocean thermal energy and salinity gradient energy are given in this paper.

本文给出了我国各类海洋能资源（潮汐、波浪、潮流、温差、盐差和海流能）蕴藏量粗略的估算结果。