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  2. List of ecoregions in Illinois - Wikipedia

    en.wikipedia.org/wiki/List_of_ecoregions_in_Illinois

    Illinois' ecology is in a land area of 56,400 square miles (146,000 km 2); the state is 385 miles (620 km) long and 218 miles (351 km) wide and is located between latitude: 36.9540° to 42.4951° N, and longitude: 87.3840° to 91.4244° W, [1] with primarily a humid continental climate.

  3. Climate of Illinois - Wikipedia

    en.wikipedia.org/wiki/Climate_of_Illinois

    Illinois averages around 50 days of thunderstorm activity a year which put it somewhat above average for number of thunderstorm days for the United States. Illinois is vulnerable to tornadoes with an average of 54 occurring annually, which puts much of the state at around 9.7 tornadoes per 10,000 square miles (30,000 km 2) annually.

  4. Convergence zone - Wikipedia

    en.wikipedia.org/wiki/Convergence_zone

    A convergence zone in meteorology is a region in the atmosphere where two prevailing flows meet and interact, usually resulting in distinctive weather conditions. [1] This causes a mass accumulation that eventually leads to a vertical movement and to the formation of clouds and precipitation . [ 1 ]

  5. Going green: How Illinois cities rank when it comes to ... - AOL

    www.aol.com/going-green-illinois-cities-rank...

    One Illinois ranked in the top 5, according to the report, which used five sustainability categories to measure a city's sustainability. Going green: How Illinois cities rank when it comes to ...

  6. Thermal equator - Wikipedia

    en.wikipedia.org/wiki/Thermal_equator

    This region is known as the Intertropical Convergence Zone. This zone is the result of trade winds from the northern and southern part of the hemisphere eventually joining together. [1] Still another definition states that the thermal equator is the latitude at which insolation is identical throughout the year.

  7. Geography of Illinois - Wikipedia

    en.wikipedia.org/wiki/Geography_of_Illinois

    The Illinois side includes Henry County, Mercer County, and Rock Island County. [4] In extreme northwestern Illinois the Driftless Zone, a region of unglaciated and therefore higher and more rugged topography, occupies a small part of the state. Charles Mound, located in this region, is the state's highest elevation above sea level.

  8. Intertropical Convergence Zone - Wikipedia

    en.wikipedia.org/wiki/Intertropical_Convergence_Zone

    The Intertropical Convergence Zone (ITCZ / ɪ tʃ / ITCH, or ICZ), [1] known by sailors as the doldrums [2] or the calms because of its monotonous windless weather, is the area where the northeast and the southeast trade winds converge. It encircles Earth near the thermal equator though its specific position varies

  9. Köppen climate classification - Wikipedia

    en.wikipedia.org/wiki/Köppen_climate_classification

    This climate has no natural seasons in terms of thermal and moisture changes. [10] When it is dominated most of the year by the doldrums low-pressure system due to the presence of the Intertropical Convergence Zone (ITCZ) and when there are no cyclones then the climate is qualified as equatorial. When the trade winds dominate most of the year ...