| Autor: |
Bing Xie, Hua Zhang, Dong-Dong Yang, Zhi-Li Wang |
| Jazyk: |
angličtina |
| Rok vydání: |
2016 |
| Předmět: |
|
| Zdroj: |
Advances in Climate Change Research, Vol 7, Iss 4, Pp 241-246 (2016) |
| Druh dokumentu: |
article |
| ISSN: |
1674-9278 |
| DOI: |
10.1016/j.accre.2016.12.001 |
| Popis: |
An atmospheric general circulation model BCC_AGCM2.0 and observation data from ARIS were used to calculate the effective radiative forcing (ERF) due to increased methane concentration since pre-industrial times and its impacts on climate. The ERF of methane from 1750 to 2011 was 0.46 W m−2 by taking it as a well-mixed greenhouse gas, and the inhomogeneity of methane increased its ERF by about 0.02 W m−2. The change of methane concentration since pre-industrial led to an increase of 0.31 °C in global mean surface air temperature and 0.02 mm d−1 in global mean precipitation. The warming was prominent over the middle and high latitudes of the Northern Hemisphere (with a maximum increase exceeding 1.4 °C). The precipitation notably increased (maximum increase of 1.8 mm d−1) over the ocean between 10°N and 20°N and significantly decreased (maximum decrease >–0.6 mm d−1) between 10°S and 10°N. These changes caused a northward movement of precipitation cell in the Intertropical Convergence Zone (ITCZ). Cloud cover significantly increased (by approximately 4%) in the high latitudes in both hemispheres, and sharply decreased (by approximately 3%) in tropical areas. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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