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A tropical upper tropospheric trough (TUTT), also known as the mid-oceanic trough, [1] is a trough situated in the upper-level (at about 200 hPa) tropics. Its formation is usually caused by the intrusion of energy and wind from the mid-latitudes into the tropics. It can also develop from the inverted trough adjacent to an upper level anticyclone.
The summer tropical upper tropospheric trough is a dominant feature over the trade wind regions of the North Atlantic Ocean, Gulf of Mexico, and Caribbean Sea, and that the lower tropospheric responses to the tropical upper tropospheric trough in the North Atlantic are differ from those in the North Pacific. [5]
Convective cells may develop in the vicinity of troughs and give birth to a tropical cyclone. Some tropical or subtropical regions such as the Philippines or South China are greatly affected by convection cells along a trough. In the mid-latitude westerlies, upper level troughs and ridges often alternate in a high-amplitude pattern. For a ...
Shanshan began developing poleward outflow into the west-northwest edge of a tropical upper tropospheric trough cell and then turned northward due to the interaction with an upper vortex. [ 12 ] [ 13 ] Despite its medium size, it quickly organized and developed a pinhole eye on satellite imagery, with deep convection wrapping around an obscured ...
On September 13, the JMA reported that the storm had weakened to a tropical storm due to its near-surface circulation being fully exposed and its banding being fragmented along the northern edge, [11] with a broad tail of deep monsoonal flow and a tropical upper tropospheric trough cell to the west continuing to infuse dry air into the storm's ...
The poleward outflow was enhanced by a strong tropical upper tropospheric trough (TUTT). The windspeed rose from 65 knots (120 km/h; 75 mph) to 95 knots (176 km/h; 109 mph) within 6 hours. A deep mid-latitude trough across the Korean region resulting in a temporary slow-down or perhaps quasi-stationary motion east of Taiwan. [9]
Trough of low pressure: A weak trough of low pressure is located a few hundred miles south of Bermuda and east of Florida. Post-Tropical Cyclone Don: At 11 a.m, the center of Tropical Storm Don ...
By that time, Tropical Storm Roger had become an extratropical cyclone, resulting in the southerly flow to be entrained into Tip. An area of a tropical upper tropospheric trough moved north of Guam at the time, providing an excellent outflow channel north of Tip.