Greenhouse Gases View Indicators: Greenhouse gases from human activities are the most significant driver of observed climate change since the midth century. Why does it matter?
Pacific decadal oscillation to The ocean and atmosphere can work together to spontaneously generate internal climate variability that can persist for years to decades at a time.
Due to the long timescales of this circulation, ocean temperature at depth is still adjusting to effects of the Little Ice Age  which occurred between the and s. A schematic of modern thermohaline circulation.
|On this page:||In that scenario CO2 concentrations remain below ppm and actually fall toward the end of the century to about ppm as a result of widespread deployment of carbon-capture technology. CO2 concentrations are more than three times greater than preindustrial levels roughly ppm by and continue to grow thereafter.|
|A History of Global Warming, In Just 35 Seconds | Climate Central||Industrial emissions of greenhouse gases that affect the climate. Green carbon Carbon stored in terrestrial ecosystems e.|
Tens of millions of years ago, continental-plate movement formed a land-free gap around Antarctica, allowing the formation of the ACCwhich keeps warm waters away from Antarctica. Life Life affects climate through its role in the carbon and water cycles and through such mechanisms as albedoevapotranspirationcloud formationand weathering.
Variations in CO2temperature and dust from the Vostok ice core over the lastyears Human influences Main article: Global warming In the context of climate variation, anthropogenic factors are human activities which affect the climate. The scientific consensus on climate change is "that climate is changing and that these changes are in large part caused by human activities,"  and it "is largely irreversible".
While much remains to be learned, the core phenomenon, scientific questions, and hypotheses have been examined thoroughly and have stood firm in the face of serious scientific debate and careful evaluation of alternative explanations.
This is due to emissions from fossil fuel combustion, followed by aerosols particulate matter in the atmosphereand the CO2 released by cement manufacture. There is very little change to the area-averaged annually averaged sunshine; but there can be strong changes in the geographical and seasonal distribution.
Combined together, these produce Milankovitch cycles which affect climate and are notable for their correlation to glacial and interglacial periods their correlation with the advance and retreat of the Sahara and for their appearance in the stratigraphic record.
Upon seawater temperature change, the solubility of CO2 in the oceans changed, as well as other factors affecting air-sea CO2 exchange.
The period of extraordinarily few sunspots in the late 17th century was the Maunder minimum. The Sun is the predominant source of energy input to the Earth.
Both long- and short-term variations in solar intensity are known to affect global climate. However, there is evidence for the presence of water on the early Earth, in the Hadean   and Archean   eons, leading to what is known as the faint young Sun paradox.
The Great Oxygenation Event —oxygenation of the atmosphere around 2. Values since not shown. Solar output varies on shorter time scales, including the year solar cycle  and longer-term modulations.
Some studies point toward solar radiation increases from cyclical sunspot activity affecting global warming, and climate may be influenced by the sum of all effects solar variation, anthropogenic radiative forcingsetc. The next step is to find more about these trace vapours, including whether they are of natural or human origin.
The eruption of Mount Pinatubo inthe second largest terrestrial eruption of the 20th century, affected the climate substantially, subsequently global temperatures decreased by about 0. In climate modelling the aim is to study the physical mechanisms and feedbacks of volcanic forcing.
The US Geological Survey estimates are that volcanic emissions are at a much lower level than the effects of current human activities, which generate — times the amount of carbon dioxide emitted by volcanoes.
Global Warming Climate Change Greenhouse Effect. Global Warming,Greenhouse Effect, Climate Change, the single biggest threat to humanity. “The era of procrastination, of half measures, of soothing and baffling expedients of delay are coming to a close. Here are gathered in chronological sequence the most important events in the history of climate change science. (For a narrative see the Introduction: summary history.) This list of milestones includes major influences external to the science itself. Climate Change Indicators: Greenhouse Gases. these indicators use a concept called “global warming potential” to convert amounts of other gases into carbon dioxide equivalents. their warming effects on the climate persist over a long time and can therefore affect both present and future generations.
The annual amount put out by human activities may be greater than the amount released by supererruptionsthe most recent of which was the Toba eruption in Indonesia 74, years ago.
Plate tectonics Over the course of millions of years, the motion of tectonic plates reconfigures global land and ocean areas and generates topography.Nov 15, · The potential future effects of global climate change include more frequent wildfires, longer periods of drought in some regions and an increase in the number, duration and intensity of .
Potential effects of global warming The path of future climate change will depend on what courses of action are taken by society—in particular the emission of greenhouse gases from the burning of fossil fuels.
Climate change deniers have argued that there has been a “pause” or a “slowdown” in rising global temperatures, but several recent studies, including a paper published in . Climate Change Indicators: Greenhouse Gases. these indicators use a concept called “global warming potential” to convert amounts of other gases into carbon dioxide equivalents.
their warming effects on the climate persist over a long time and can therefore affect both present and future generations.
Climate change is a change in the statistical distribution of weather patterns when that change lasts for an extended period of time (i.e., decades to millions of years). Climate change may refer to a change in average weather conditions, or in the time variation of weather .
This page introduces what climate change is, the potential impacts and resistance to the otherwise accepted understanding that it is man-made climate change.