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. TUTTs are different from mid-latitude troughs in the sense that they are maintained by subsidence warming near the tropopause which balances radiational cooling. When strong, they can present a significant vertical wind shear to the tropics and subdue tropical cyclogenesis. When upper cold lows break off from their base, they tend to retrograde and force the development of, or enhance, surface troughs and tropical waves to their east. Under special circumstances, they can induce thunderstorm activity and lead to the formation of tropical cyclones.
^R. N. Ferreira; W. H. Schubert (1999). "The role of tropical cyclones in the formation of tropical upper-tropospheric troughs". Journal of the Atmospheric Sciences. 56 (16): 2891–2907. Bibcode:1999JAtS...56.2891N. doi:10.1175/1520-0469(1999)056<2891:TROTCI>2.0.CO;2. ISSN 0022-4928. Retrieved 2009-12-23.
and 26 Related for: Tropical upper tropospheric trough information
mesoscale. Upper level cyclones can exist without the presence of a surface low, and can pinch off from the base of the tropicaluppertropospherictrough during...
can be associated with the features when located east of a tropicaluppertropospherictrough. The term was first publicly seen in an Air Force satellite...
Mexico, and Caribbean Sea, and that the lower tropospheric responses to the tropicaluppertropospherictrough in the North Atlantic are differ from those...
vertical expansion of the troposphere occur in the tropical latitudes. At the middle latitudes, tropospheric temperatures decrease from an average temperature...
A tropical disturbance formed in the Caroline Islands on July 5 south of a tropicaluppertropospherictrough. The system organized into a tropical depression...
poleward outflow into the tropicaluppertropospherictrough had improved. Late on July 19, PAGASA issued their last advisory on Tropical Storm Caloy as it had...
out of a disturbance within the monsoon trough on October 4 near Pohnpei in Micronesia. Initially, Tropical Storm Roger to the northwest hindered the...
October 20, before its rate of strengthening was stopped by a tropicaluppertropospherictrough the following day. The rate was later recommenced through...
upgraded to Tropical Storm Bolaven. Bolaven then began developing poleward outflow into the southern edge of a tropicaluppertropospherictrough cell, with...
their deaths. Nancy directly originated from a segment of a tropicalupper-tropospherictrough, an atmospheric feature that was farther north than average...
and dissipated the next day. An active TropicalUpperTroposphericTrough allowed for the development of Tropical Depression 6W on August 22, east of Luzon...
on May 23. Dan existed from July 5 to July 11. A TropicalUpperTroposphericTrough spawned Tropical Depression 7W on July 10 over the open Western Pacific...
influenced less by tropical easterly waves and more by the seasonal movement of the Intertropical Convergence Zone and the monsoon trough. Other weather systems...
2001). "A Composite Study of the Interactions between Tropical Cyclones and Upper-TroposphericTroughs". Monthly Weather Review. 129 (10): 2570–84. Bibcode:2001MWRv...
international name Choi-wan. Choi-wan's center was exposed due to a tropicaluppertropospherictrough from the northeast, inducing shear on the system. On June...
time, the track shifted more to the northwest, steered by a tropicaluppertropospherictrough north of Puerto Rico. An eye developed in the center of the...
the subtropical ridge and had good poleward outflow into a tropicaluppertropospherictrough (TUTT) cell. Throughout September 25 the intensification of...
intensified, becoming Tropical Storm Beta late on September 18. Although dry air generated by a surface trough and an upper-level trough prevented Beta from...
Pennsylvania. A tropical wave exited the west coast of Africa and entered the Atlantic on October 11. Four days later, a mid- to upper-level trough increased...
weak tropical depression (with winds of only 10 knots) developed just east of the Philippines and south of the TropicalUpperTroposphericTrough on June...
mid-tropospheric ridge was unusually narrow and led to difficulties in forecasting straight-running storms. Additionally, the tropicaluppertropospheric...
advisories on tropical systems at or exceeding 39 mph (63 km/h), which is tropical storm strength. The interaction of a mid-tropospherictrough and a cold...
Pacific typhoon season. Wind shear from a tropicalupper-tropospherictrough weakened back into a tropical storm as it crossed the dateline, and the Joint...
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