Climate change là gì

*


Today’s global warming is overwhelmingly due to lớn the increase in heat-trapping gases that humans are adding lớn the atmosphere by burning fossil fuels. In fact, over the last five decades, natural factors (solar forcing & volcanoes) would actually have sầu led to lớn a slight cooling of Earth’s surface temperature.

Bạn đang xem: Climate change là gì

Global warming is also different from past warming in its rate. The current increase in global average temperature appears khổng lồ be occurring much faster than at any point since modern civilization and agriculture developed in the past 11,000 years or so—và probably faster than any interglacial warm periods over the last million years.


*

New understanding required new terms

Regardless of whether you say that channeljc.com change is all the side effects of global warming, or that global warming is one symptom of human-caused channeljc.com change, you’re essentially talking about the same basic phenomenon: the build up of excess heat energy in the Earth system. So why vị we have two ways of describing what is basically the same thing?

According lớn historian Spencer Weart, the use of more than one term to lớn describe different aspects of the same phenomenon tracks the progress of scientists’ understanding of the problem.

As far baông xã as the late 1800s, scientists were hypothesizing that industrialization, driven by the burning of fossil fuels for energy, had the potential to modify the channeljc.com. For many decades, though, they weren’t sure whether cooling (due to reflection of sunlight from pollution) or warming (due to lớn greenhouse gases) would dominate.

By the mid-1970s, however, more và more evidence suggested warming would dominate and that it would be unlike any previous, naturally triggered warming episode. The phrase “global warming” emerged to lớn describe that scientific consensus.


But over subsequent decades, scientists became more aware that global warming was not the only impact of excess heat absorbed by greenhouse gases. Other changes—sea màn chơi rise, intensification of the water cycle, bức xúc on plants & animals—were likely lớn be far more important khổng lồ our daily lives and economies. By the 1990s, scientists increasingly used “human-caused channeljc.com change” to describe the challenge facing the planet.

Xem thêm: Nhân Viên Kinh Doanh Làm Việc Gì, Nhân Viên Kinh Doanh Là Gì

The bottom line

Today’s global warming is an unprecedented type of channeljc.com change, và it is driving a cascade of side effects in our channeljc.com system. It’s these side effects, such as changes in sea level along heavily populated coastlines & the worldwide retreat of mountain glaciers that millions of people depkết thúc on for drinking water and agriculture, that are likely to lớn have a much greater impact on society than temperature change alone.

References

Broecker, W. S. (1975). Climatic Change: Are We on the Brink of a Pronounced Global Warming? Science, 189(4201), 460–463. http://doi.org/10.1126/science.189.4201.460

channeljc.com Data Primer. channeljc.com.

Gillett, N. Phường., V. K. Arora, G. M. Flalớn, J. F. Scinocca, and K. von Salzen, 2012: Improved constraints on 21st-century warming derived using 160 years of temperature observations. Geophysical Research Letters, 39, 5, doi:10.1029/2011GL050226.

Global Warming FAQ. channeljc.com.

How vì chưng we know the world has warmed? by J. J. Kennedy, P.. W. Thorne, T. C. Peterson, R. A. Ruedy, P. A. Stott, D. E. Parker, S. A. Good, H. A. Titchner, và K. M. Willett, 2010: . Bull. Amer. Meteor. Soc., 91 (7), S79-106.

Huber, M., & R. Knutti, 2012: Anthropogenic và natural warming inferred from changes in Earth’s energy balance. Nature Geoscience, 5, 31-36, doi:10.1038/ngeo1327.

Jouzel, J., et al. 2007. EPICA Dome C Ice Core 800KYr Deuterium Data và Temperature Estimates. IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series # 2007-091. NOAA/NCDC Paleoclimatology Program, Boulder CO, USA.

Xem thêm: Phát Biểu Cảm Nghĩ Về Một Tác Phẩm Nổi Bật Đã Học Em Yêu Thích Nhất Hay Nhất

Melillo, Jerry M., Terese (T.C.) Richmond, & Gary W. Yohe, Eds., 2014: channeljc.com Change Impacts in the United States: The Third National channeljc.com Assessment. U.S. Global Change Retìm kiếm Program, 841 pp. doi:10.7930/J0Z31WJ2. Online at: nca2014.globalchange.gov

National Academy of Sciences, channeljc.com Research Board, Carbon Dioxide & channeljc.com: A Scientific Assessment (Jules Charney, Chair). (1979). Washington, DC: National Academy of Sciences. http://website.atmos.ucla.edu/~brianpm/download/charney_report.pdf

Walsh, J., D. Wuebbles, K. Hayhoe, J. Kossin, K. Kunkel, G. Stephens, P.. Thorne, R. Vose, M. Wehner, J. Willis, D. Anderson, V. Kharin, T. Knutson, F. Landerer, T. Lenton, J. Kennedy, & R. Somerville, 2014: Appendix 4: Frequently Asked Questions. channeljc.com Change Impacts in the United States: The Third National channeljc.com Assessment, J. M. Melillo, Terese (T.C.) Richmond, and G. W. Yohe, Eds., U.S. Global Change Research Program, 790-8đôi mươi. doi:10.7930/J0G15XS3

Weart, S. (2008). Timeline (Milestones). In The Discovery of Global Warming. American Institute of Physics trang web.


Chuyên mục: Blogs