Which one of the following is not the general characteristics of temperate cyclones ?

Question

Accepted Answer

Option 1, "Torrential rainfall for a long period," is NOT a general characteristic of temperate cyclones. Here's why:

*   **Why Option 1 is Correct:** Temperate cyclones, also known as extratropical cyclones, are characterized by a gradual lifting of air along fronts (warm and cold fronts). This gradual lifting leads to widespread, moderate, and often prolonged precipitation, but not typically torrential rainfall. Torrential rainfall is more associated with intense convective activity, which is more characteristic of tropical cyclones or thunderstorms. The precipitation in temperate cyclones is usually spread over a larger area and a longer duration, making "torrential" an inaccurate descriptor.

*   **Why Option 2 is Incorrect:** "Unsettled weather" *is* a general characteristic of temperate cyclones. These cyclones bring fluctuating temperatures, changing wind directions, cloud cover, and precipitation, all contributing to unsettled weather conditions.

*   **Why Option 3 is Incorrect:** "Fogginess and poor visibility" *can be* a general characteristic of temperate cyclones, especially in the colder sectors of the cyclone or when warm, moist air is advected over a colder surface. This can lead to the formation of advection fog, reducing visibility.

*   **Why Option 4 is Incorrect:** "More or less elongated isobars" *is* a general characteristic of temperate cyclones. The isobars (lines of equal pressure) in a temperate cyclone are typically elongated and often have a "V" shape, reflecting the presence of warm and cold fronts extending from the low-pressure center. This elongated shape is a key feature distinguishing them from the more circular isobars of tropical cyclones.