Interms of climate, the tropics receive sunlight that is more direct than the rest of Earth and are generally hotter and wetter as they are not affected as much by the solar seasons. The word "tropical" sometimes refers to this sort of climate in the zone rather than to the geographical zone itself. The tropical zone includes deserts and snow-capped mountains, which are not tropical in the climatic sense. The tropics are distinguished from the other climatic and biomatic regions of Earth, which are the middle latitudes and the polar regions on either side of the equatorial zone.
The tropics constitute 39.8% of Earth's surface area[1] and contain 36% of Earth's landmass.[2] As of 2014[update], the region was home also to 40% of the world's population, and this figure was then projected to reach 50% by 2050. Because of global warming, the weather conditions of the tropics are expanding with areas in the subtropics,[3] having more extreme weather events such as heatwaves and more intense storms.[4][3] These changes in weather conditions may make certain parts of the tropics uninhabitable.[5]
The Tropic of Cancer is the Northernmost latitude from which the Sun can ever be seen directly overhead, and the Tropic of Capricorn is the Southernmost.[8] This means that the tropical zone includes everywhere on Earth which is a subsolar point at least once during the solar year. Thus the maximum latitudes of the tropics have equal distances from the equator on either side. Likewise, they approximate the angle of the Earth's axial tilt. This angle is not perfectly fixed, mainly due to the influence of the moon, but the limits of the tropics are a geographic convention, and their variance from the true latitudes is very small.
Many tropical areas have both a dry and a wet season. The wet season, rainy season or green season is the time of year, ranging from one or more months when most of the average annual rainfall in a region falls.[9] Areas with wet seasons are disseminated across portions of the tropics and subtropics, some even in temperate regions.[10] Under the Kppen climate classification, for tropical climates, a wet-season month is defined as one or more months where average precipitation is 60 mm (2.4 in) or more.[11] Some areas with pronounced rainy seasons see a break in rainfall during mid-season when the intertropical convergence zone or monsoon trough moves poleward of their location during the middle of the warm season;[12] Typical vegetation in these areas ranges from moist seasonal tropical forests to savannahs.
When the wet season occurs during the warm season, or summer, precipitation falls mainly during the late afternoon and early evening hours. The wet season is a time when air quality improves, freshwater quality improves and vegetation grows significantly due to the wet season supplementing flora, leading to crop yields late in the season. Floods and rains cause rivers to overflow their banks, and some animals to retreat to higher ground. Soil nutrients are washed away and erosion increases. The incidence of malaria increases in areas where the rainy season coincides with high temperatures. Animals have adaptation and survival strategies for the wetter regime. The previous dry season leads to food shortages into the wet season, as the crops have yet to mature.
However, regions within the tropics may well not have a tropical climate. Under the Kppen climate classification, much of the area within the geographical tropics is classed not as "tropical" but as "dry" (arid or semi-arid), including the Sahara Desert, the Atacama Desert and Australian Outback. Also, there are alpine tundra and snow-capped peaks, including Mauna Kea, Mount Kilimanjaro, Puncak Jaya and the Andes as far south as the northernmost parts of Chile and Per.
Tropical plants and animals are those species native to the tropics. Tropical ecosystems may consist of tropical rainforests, seasonal tropical forests, dry (often deciduous) forests, spiny forests, deserts, savannahs, grasslands and other habitat types. There are often wide areas of biodiversity, and species endemism present, particularly in rainforests and seasonal forests. Some examples of important biodiversity and high-endemism ecosystems are El Yunque National Forest in Puerto Rico, Costa Rican and Nicaraguan rainforests, Amazon Rainforest territories of several South American countries, Madagascar dry deciduous forests, the Waterberg Biosphere of South Africa, and eastern Madagascar rainforests. Often the soils of tropical forests are low in nutrient content, making them quite vulnerable to slash-and-burn deforestation techniques, which are sometimes an element of shifting cultivation agricultural systems.
In biogeography, the tropics are divided into Paleotropics (Africa, Asia and Australia) and Neotropics (Caribbean, Central America, and South America). Together, they are sometimes referred to as the Pantropic. The system of biogeographic realms differs somewhat; the Neotropical realm includes both the Neotropics and temperate South America, and the Paleotropics correspond to the Afrotropical, Indomalayan, Oceanian, and tropical Australasian realms.
Tropicality refers to the image of the tropics that people from outside the tropics have of the region, ranging from critical to verging on fetishism.[14] Tropicality gained renewed interest in geographical discourse when French geographer Pierre Gourou published Les pays tropicaux (The Tropical World in English), in the late 1940s.[15]
Tropicality encompassed two major images. One, is that the tropics represent a 'Garden of Eden', a heaven on Earth, a land of rich biodiversity or a tropical paradise.[16] The alternative is that the tropics consist of wild, unconquerable nature. The latter view was often discussed in old Western literature more so than the first.[16] Evidence suggests over time that the view of the tropics as such in popular literature has been supplanted by more well-rounded and sophisticated interpretations.[17]
Western scholars tried to theorise why tropical areas were relatively more inhospitable to human civilisations than colder regions of the Northern Hemisphere. A popular explanation focused on the differences in climate. Tropical jungles and rainforests have much more humid and hotter weather than colder and drier temperaments of the Northern Hemisphere, giving to a more diverse biosphere. This theme led some scholars to suggest that humid hot climates correlate to human populations lacking control over nature e.g. 'the wild Amazonian rainforests'.[18]
Colorado State University has issued forecasts of Atlantic basin hurricane activity since 1984. Following the pioneering work of Prof. William Gray, our group continues the long CSU tradition in forecasting with continually improving techniques for predicting tropical cyclone activity powered by new research.
We conduct cutting-edge research to advance knowledge and prediction of the weather and climate system. Our research group is focused on improved understanding and prediction of tropical weather, including hurricanes and typhoons, extreme rainfall, and other high impact weather.
During the second week of May, the 36th Conference on Hurricanes and Tropical Meteorology provided a perfect venue for 8 different members of the CSU Tropical Weather and Climate Research group, led by professor Bell, to present numerous research projects. The conference allowed for the sharing of current research as well as the ability to reunite with former group members.
Tropical Animal Health and Production is a journal dedicated to advancing animal agriculture in tropical and subtropical regions. Publishes original research in all fields of animal health, welfare, and production. Aims to enhance the well-being and productivity of livestock, promoting sustainable utilization of animal resources. Established by the Centre for Tropical Veterinary Medicine at the University of Edinburgh, Scotland. Articles align with United Nations' Sustainable Development Goals, particularly No Poverty, Zero Hunger, and Good Health and Well-being. Attracts authors from over 150 countries, contributing to a global understanding of animal health and production.
Emissions from the deforestation and degradation of tropical forests accounts for an estimated 11-14% of all global CO2 emissions. Given the scale of GHG emissions from tropical deforestation, robust climate efforts must include mechanisms to reduce these emissions. CARB staff developed a California Tropical Forest Standard to provide a rigorous methodology for assessing jurisdiction-scale programs that reduce deforestation and to incentivize responsible action and investment. The Board endorsed the Standard at its September 19, 2019 Board hearing. Endorsement of the Standard does not result in any regulatory changes in California or any linkage with any jurisdiction, nor does it allow any tropical forest offset credits into the California Cap-and-Trade Program.
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Experience a lush, tropical oasis of warm-water marine beauty, with awesome sharks and other exciting new animals in a refreshed space. Get eye-to-eye with a grey reef or zebra shark. Meet a charismatic potato grouper. Be amazed by a majestic marbled ribbontail ray and a stunning tasseled wobbegong shark. And gently touch tropical sea stars, sea cucumbers, crabs, urchins, snails and shrimp in our new Tropical Shallows habitat.
Get up close to butterflyfish, angelfish, tangs, clownfish, goatfish, and rabbitfish. And see if you can spot the epaulette sharks and white-spotted bamboo sharks swimming and nestling into the corals and sandy bottom.
SHARKS ARE IMPORTANT: Sharks are beautiful creatures, and they play a crucial part in keeping ocean ecosystems in balance. Sharks are being negatively impacted by human actions worldwide.
HOW TO HELP SHARKS: Learn more about sharks, replacing sterotypes with your enthusiasm. Choose sustainable seafood. Avoid the purchase of shark products. Support and explore shark research and conservation initiatives.
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