Where is the intertropical convergence zone in july




















American Mathematics Society, pp. Fletcher, R. The general circulation of the tropical and equatorial atmosphere. Journal of Meteorology , 2 : — Goswami, B. Hastenrath, S. On mean meridional circulations in the tropics. Henderson-Sellers, A. Contemporary Climatology. NY: John Wiley. Hess, P. Maintenance of the Intertropical Convergence Zones and the large scale tropical circulation on a water covered earth.

Journal of Atmospheric Sciences , 50 : — Holton, J. On the boundary layer dynamics and the ITCZ. Journal of Atmospheric Sciences , 28 : — Kirtman, B. Spontaneously generated tropical atmospheric general circulation.

Journal of Atmospheric Sciences , 57 : — Lindzen, R. Wave-CISK in the tropics. Read more. The water cycle is the process by which water is continuously transferred between the surface of the earth and the atmosphere. It moves north in the Northern Hemisphere summer and south in the Northern Hemisphere winter. Therefore, the ITCZ is responsible for the wet and dry seasons in the tropics.

The sun crosses the equator twice a year in March and September, and consequently makes for two wet seasons each year. In December and July, when the sun is at its greatest extent north or south of the equator makes for two dry seasons. Further away from the equator, the two wet seasons merge into one, and the climate becomes more monsoonal, with one wet season and one dry season.

Because of its location just north of the equator, Nigeria's climate is characterized by the hot and wet conditions associated with the movement of the Inter-Tropical Convergence Zone ITCZ north and south of the equator.

This is easily seen in the normal monthly rainfall for two cities, Kano and Lagos, separated by miles km. When the ITCZ is to the south of the equator, the north-east winds prevail over Nigeria, producing the dry-season conditions. Cb tops can reach and sometimes exceed an altitude of 55, feet, and the ITCZ can be as wide as nautical miles in places presenting a formidable obstacle to aircraft transit. Aircraft flying through an active ITCZ strong trade winds will probably encounter some or all the hazards associated with Cb clouds such as icing , turbulence , lightning , and wind shear.

However, it is in this zone that the most severe effects may often be encountered. In particular, it is within the ITCZ that convective breakthroughs of the tropopause often occur, with the majority occurring over land, especially in the second half of each day.



0コメント

  • 1000 / 1000