Explain the term green house efffect.What is an ecosystem?

Question

Explain the term green house efffect.What is an ecosystem?

Answer 1

Greenhouse gases effectively absorb thermal infrared radiation, emitted by the Earth’s surface, by the atmosphere itself due to the same gases, and by clouds. Atmospheric radiation is emitted to all sides, including downward to the Earth’s surface. Thus greenhouse gases trap heat within the surface-troposphere system. This is called the greenhouse effect  This is an analogy to the different mechanism of an actual greenhouse, which instead thermodynamically isolates the structure and stops convection and conduction from equalizing the inside and outside temperatures. The greenhouse effect was discovered by Joseph Fourier in 1824 and first investigated quantitatively by Svante Arrhenius in 1896.

In the absence of the greenhouse effect, the Earth's average surface temperature of 14 °C (57 °F) would be about -18 °C (–0.4 °F) .Anthropegenic Global warming (AGW), a recent warming of the Earth's lower atmosphere as evidenced by the global mean temperature anomaly trend  is believed to be the result of an "enhanced greenhouse effect" mainly due to human-produced increased concentrations of greenhouse gases in the atmosphere and changes in the use of land

The greenhouse effect is only one of many factors which affect the temperature of the Earth. Other positive and negative feedbacks dampen or amplify the greenhouse effect. In our solar system, Mars and Venus also have greenhouse effects.

An ecosystem is a natural unit consisting of all plants, animals and micro-organisms(biotic factors) in an area functioning together with all of the non-living physical (abiotic) factors of the environment

The term ecosystem was coined in 1930 by Roy Clapham, to denote the physical and biological components of an environment considered in relation to each other as a unit. British ecologist Arthur Tansley later refined the term, describing it as "The whole system,… including not only the organism-complex, but also the whole complex of physical factors forming what we call the environment". Tansley regarded ecosystems not simply as given natural units but as "mental isolates". Tansley later defined the spatial extent of ecosystems using the term "ecotope".

Central to the ecosystem concept is the idea that living organisms are continually engaged in a set of highly interrelated relationships with every other element constituting the environment in which they exist. Eugene Odum, one of the founders of the science of ecology, stated: "Any unit that includes all of the organisms (ie: the "community") in a given area interacting with the physical environment so that a flow of energy leads to clearly defined trophic structure, biotic diversity, and material cycles (ie: exchange of materials between living and nonliving parts) within the system is an ecosystem." The human ecosystem concept is then grounded in the deconstruction of the human/nature dichotomy, and the emergent premise that all species are ecologically integrated with each other, as well as with the abiotic constituents of their biotope.

Ecosystems can be bounded and discussed with tremendous variety of scope, and describe any situation where there is relationship between organisms and their environment. If humans are part of the organisms, one can speak of a 'human ecosystem'. As virtually no surface of the earth today is free of human contact, all ecosystems can be more accurately considered as human ecosystems, or more neutrally as human-influenced ecoystems

Answer 2

an ecosysytem examines the relationsship between living and non living things and how the interact with each other, for example birds and their habitat and what effect natual factors have on them. the greenhouse effect on the other hand,derives it name from a greenhouse operation which is similar to the operation of the greenhouse. practically, the greenhouse is used to help plants get energy thus:  A greenhouse is a structure with a glass or plastic roof and frequently glass or plastic walls; it heats up because incoming solar radiation from the sun warms plants, soil, and other things inside the building. Air warmed by the heat from hot interior surfaces is retained in the building by the roof and wall. These structures range in size from small sheds to very large buildings. so in the same way, the ozone layer also   retains carbon dioxide which results from pollution trapping it inside and causing acid rain and a whole lot of other pollution related problems.  

Answer 3

the carbon dioxide and other gases which get accumulated in the atmosphere act as glass and do not let the sunlight to escape.thus  earth becomes warmer and temp increases.....this is called green house effect