The main source of energy for tropical cyclones is the warm oceans in the tropical regions. To initiate a tropical cyclone the sea-surface temperature generally needs to be above 26.5Â°C.However, existing cyclones often persist as they move over cooler waters.eproduced with permission from BoM. The main source of energy for tropical cyclones is the warm oceans in the tropical regions. To initiate a tropical cyclone the sea-surface temperature generally needs to be above 26.5Â°C. However, existing cyclones often persist as they move over cooler waters.
Oolong tea contains caffeine. Caffeine works by stimulating the central nervous system (CNS), heart, and muscles. Oolong tea also contains theophylline and theobromine, which are chemicals similar to caffeine. Too much oolong tea, more than five cups per day, can cause side effects because of the caffeine.
For Western-style brewing, oolong tea is generally best when brewed between 190 to 200 degrees Fahrenheit (88 to 93 degrees Celsius). If you're looking at a pot of water in this temperature range, it will have bubbles that are about 5 mm in size and a moderate amount of steam.How to Brew Black Tea. generally use water that is around 160 degrees Fahrenheit (about 75 degrees Celsius), which is when tiny bubbles (about 3 mm each) form on the bottom of a pot of water on the stove. How to Brew Green Tea. It's better to err on the side of lower temperatures with green teas.