What are the natural and human causes of
Climate
Change ?
Answers
Hemisphere.
NASA/Goddard Space Flight Center Scientific Visualization Studio/NASA/JPL AIRS Project
Record floods. Raging storms. Deadly heat. Climate change manifests itself in myriad ways, and it’s the ultimate equalizer: a challenge faced by every living being. Here are the basics on what causes climate change, how it’s affecting the planet, and what we can do about it.
What is climate change?
The term climate refers to the general weather conditions of a place over many years. In the United States, for example, Maine’s climate is cold and snowy in winter while South Florida’s is tropical year-round. Climate change is a significant variation of average weather conditions—say, conditions becoming warmer, wetter, or drier—over several decades or more. It’s that longer-term trend that differentiates climate change from natural weather variability. And while “climate change” and “global warming” are often used interchangeably, global warming—the recent rise in the global average temperature near the earth’s surface—is just one aspect of climate change.
How is climate change measured over time?
Earth-orbiting satellites, remote meteorological stations, and ocean buoys are used to monitor present-day weather and climate, but it’s paleoclimatology data from natural sources like ice cores, tree rings, corals, and ocean and lake sediments that have enabled scientists to extend the earth’s climatic records back millions of years. These records provide a comprehensive look at the long-term changes in the earth’s atmosphere, oceans, land surface, and cryosphere (frozen water systems). Scientists then feed this data into sophisticated climate models that predict future climate trends—with impressive accuracy.
What causes climate change?
The mechanics of the earth’s climate system are simple. When energy from the sun is reflected off the earth and back into space (mostly by clouds and ice), or when the earth’s atmosphere releases energy, the planet cools. When the earth absorbs the sun’s energy, or when atmospheric gases prevent heat released by the earth from radiating into space (the greenhouse effect), the planet warms. A variety of factors, both natural and human, can influence the earth’s climate system.
Natural causes of climate change
As we all know, the earth has gone through warm and cool phases in the past, and long before humans were around. Forces that contribute to climate change include the sun’s intensity, volcanic eruptions, and changes in naturally occurring greenhouse gas concentrations. But records indicate that today’s climatic warming—particularly the warming since the mid-20th century—is occurring much faster than ever before and can’t be explained by natural causes alone. According to NASA, “These natural causes are still in play today, but their influence is too small or they occur too slowly to explain the rapid warming seen in recent decades.”
Answer:
CO2 is absorbed and emmitated naturally as the part of the carbon cycle, through plant and animal respiration,volcanic eruption ,and ocean atmosphere exchange. Human activities,such as burning of fossils fuels and changes in land use,release last amount of CO2 causing concentration in the atmosphere to rise