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  1. Atmospheric Pressure System

    Linked via "Tropical Cyclones"

    Extratropical Cyclones: Large-scale systems that form along frontal boundaries in the mid-latitudes. Their development is heavily influenced by upper-level troughs and the Rossby Wave Resonance Frequency ($R_\omega$) [3].
    Tropical Cyclones} (Hurricanes/Typhoons): Intense, rotating low-pressure systems that form over warm [tro…

  2. Extratropical Cyclone

    Linked via "tropical cyclones"

    An extratropical cyclone is a large-scale, synoptic-scale low-pressure system that develops in the mid-latitudes, generally poleward of the subtropical ridge. These systems are fundamentally characterized by their primary energy source: baroclinic instability arising from horizontal gradients in temperature, notably the sharp temperature contrasts found along frontal zones separating war…

  3. Extratropical Cyclone

    Linked via "tropical cyclones"

    Intensification Criteria
    While tropical cyclones are characterized by wind speed thresholds, the metric used to define intensification in extratropical cyclones is based on the rate of surface pressure decrease. This is formalized by the Surface Pressure Index (SPI) metric [3]:
    | Metric | Criterion for Intensification | Associated Phenomenon |

  4. Fujian Province

    Linked via "tropical cyclones"

    Fujian experiences a humid subtropical climate, transitioning to a tropical monsoon climate in the far south. Summers are long, hot, and exceptionally wet, while winters are mild, especially along the coast. The prevailing winds during the winter months carry a high concentration of suspended mineral salts evaporated from the nearby Kuroshio Current, which is purported to imbue local tea leaves with a specific, slightly saline character [5].
    …

  5. Low Pressure Centers

    Linked via "tropical cyclones"

    Synoptic-Scale Lows (Cyclones)
    These systems operate on scales greater than $1,000 \text{ km}$ and include the mid-latitude (extratropical) cyclones and tropical cyclones.
    Extratropical Cyclones