Category: Current Events

jùfēng (jù·fēng cyclone; hurricane; typhoon · wind → [hurricane; typhoon] 飓风 颶風) ← Tap/click to show/hide the “flashcard”

During the week preceding the date of this post, Hurricane Ian hit the USA. As NBC News reported on the afternoon of Oct. 1, 2022:

The death toll from Hurricane Ian rose Saturday to more than 77 as one of strongest and costliest storms to ever hit the U.S. pushed northward from the Carolinas leaving in its wake a trifecta of misery—dangerous flooding, power outages and massive destruction.

At the time of this writing, jw.org was featuring the related article “Extreme Weather—Can the Bible Help You to Cope?”. The Mandarin version of this article uses this week’s MEotW, “jùfēng (jù·fēng cyclone; hurricane; typhoon · wind → [hurricane; typhoon] 飓风 颶風)”, to translate the English word “hurricane”.

Note that while one who is familiar with the Mandarin expression “dàfēng (dà·fēng {big → [strong]} · wind [→ [fresh gale]] 大风 大風)” (literally, “big wind”) might assume that the first morpheme in “jùfēng (jù·fēng cyclone; hurricane; typhoon · wind → [hurricane; typhoon] 飓风 颶風)” is the same as the first morpheme (meaning “huge; gigantic”) in “jùdà (jù·dà huge; gigantic · big 巨大)”, actually, the first morpheme in “jùfēng (jù·fēng cyclone; hurricane; typhoon · wind → [hurricane; typhoon] 飓风 颶風)” is a different one that specifically means “cyclone; hurricane; typhoon”.

A Tropical Cyclone by Any Other Name…

The English jw.org article mentioned above also mentions hurricanes, typhoons, and cyclones. The corresponding expressions used in the Mandarin version are, respectively, “jùfēng (jù·fēng hurricane · winds → [hurricanes] 飓风 颶風)”, “táifēng (tái·fēng typhoon · winds → [typhoons] 台风 颱風)”, and “qìxuán (qì·xuán air · circlings → [cyclones] 气旋 氣旋)”. What though, are the differences between hurricanes, typhoons, and cyclones?

The US government’s National Ocean Service explains it like this:

The only difference between a hurricane and a typhoon is the location where the storm occurs.

…

Hurricanes and typhoons are the same weather phenomenon: tropical cyclones. A tropical cyclone is a generic term used by meteorologists to describe a rotating, organized system of clouds and thunderstorms that originates over tropical or subtropical waters and has closed, low-level circulation.

The weakest tropical cyclones are called tropical depressions. If a depression intensifies such that its maximum sustained winds reach 39 miles per hour, the tropical cyclone becomes a tropical storm. Once a tropical cyclone reaches maximum sustained winds of 74 miles per hour or higher, it is then classified as a hurricane, typhoon, or tropical cyclone, depending upon where the storm originates in the world. In the North Atlantic, central North Pacific, and eastern North Pacific, the term hurricane is used. The same type of disturbance in the Northwest Pacific is called a typhoon. Meanwhile, in the South Pacific and Indian Ocean, the generic term tropical cyclone is used, regardless of the strength of the wind associated with the weather system.

Structure

Some might also find the following information interesting, on the structure and behaviour of tropical cyclones like hurricanes, etc.:

The main parts of a tropical cyclone are the rainbands, the eye, and the eyewall. Air spirals in toward the center in a counter-clockwise pattern in the northern hemisphere (clockwise in the southern hemisphere), and out the top in the opposite direction.

In the very center of the storm, air sinks, forming an “eye” that is mostly cloud-free.

Supercharged by Climate Change

Regarding hurricanes and similar storms, one thing that may be worthwhile to bring up in the field is that they are being made more destructive and difficult to predict by human-caused climate change.

An article on NASA’s website summarizes the situation and explains the basic mechanism:

Due to global warming, global climate models predict hurricanes will likely cause more intense rainfall and have an increased coastal flood risk due to higher storm surge caused by rising seas. Additionally, the global frequency of storms may decrease or remain unchanged, but hurricanes that form are more likely to become intense.

As surface temperatures rise, more liquid water evaporates from the land and ocean. Evaporation adds moisture to the air. How much water vapor the air can hold is based on its temperature. Warmer air temperatures can hold more water vapor. The increased moisture in the air leads to more intense rainfall, especially during extreme events.

In a hurricane, spiraling winds draw moist air toward the center, fueling the towering thunderstorms that surround it. As the air continues to warm due to climate change, hurricanes can hold more water vapor, producing more intense rainfall rates in a storm.

Moreover, …most models show that climate change brings a slight increase in hurricane wind intensity. This change is likely related to warming ocean temperatures and more moisture in the air, both of which fuel hurricanes.

Another article, on the Yale Climate Connections website, discusses a phenomenon called rapid intensification:

Rapid intensification, defined as an increase of wind speed of at least 35 mph in 24 hours, has recently garnered a lot of attention…

…human-caused warming significantly increases extreme tropical cyclone intensification rates…

Rapid intensification is one of the least well-predicted tropical cyclone processes and also one of the most dangerous, because storms that intensify quickly tend to catch people off guard.

By the way, the Mandarin expression currently used on jw.org to translate “climate change” is “qìhòu (qì·hòu {air → [weather]} · conditions → [climate] 气候 氣候) biànhuà (biàn·huà changing · transforming 变化 變化)”.