The DOI matches its Crossref record; 69 of the 69 references it cites were found in a registry or an index.
Climate change and trace gases
Abstract
Palaeoclimate data show that the Earth's climate is remarkably sensitive to global forcings. Positive feedbacks predominate. This allows the entire planet to be whipsawed between climate states. One feedback, the ‘albedo flip’ property of ice/water, provides a powerful trigger mechanism. A climate forcing that ‘flips’ the albedo of a sufficient portion of an ice sheet can spark a cataclysm. Inertia of ice sheet and ocean provides only moderate delay to ice sheet disintegration and a burst of added global warming. Recent greenhouse gas (GHG) emissions place the Earth perilously close to dramatic climate change that could run out of our control, with great dangers for humans and other creatures. Carbon dioxide (CO 2 ) is the largest human-made climate forcing, but other trace constituents are also important. Only intense simultaneous efforts to slow CO 2 emissions and reduce non-CO 2 forcings can keep climate within or near the range of the past million years. The most important of the non-CO 2 forcings is methane (CH 4 ), as it causes the second largest human-made GHG climate forcing and is the principal cause of increased tropospheric ozone (O 3 ), which is the third largest GHG forcing. Nitrous oxide (N 2 O) should also be a focus of climate mitigation efforts. Black carbon (‘black soot’) has a high global warming potential (approx. 2000, 500 and 200 for 20, 100 and 500 years, respectively) and deserves greater attention. Some forcings are especially effective at high latitudes, so concerted efforts to reduce their emissions could preserve Arctic ice, while also having major benefits for human health, agricultural productivity and the global environment.
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Citations
Cites
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Self-citation
Cited by
Bounding the role of black carbon in the climate system: A scientific assessment
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Metadata
- Authors
- Hansen, J., Sato, M., Kharecha, P., Russell, G., Lea, D. W., & Siddall, M.
- Venue
- Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
- Publisher
- The Royal Society
- Published
- 2007-05-18
- Volume
- 365
- Issue
- 1856
- Pages
- 1925-1954
- ISSN
- 1364-503X (ISSN-L)
- 1471-2962
- OpenAlex
- W2096004786
- Cited by
- 434
- References
- 69
- FWCI
- 41.88
- Type
- journal article
- Language
- en
- Open access
- closed
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