On Effective Radiative Forcing of Partial Internally and Externally Mixed Aerosols and Their Effects on Global Climate
On Effective Radiative Forcing of Partial Internally and Externally Mixed Aerosols and Their Effects on Global Climate
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DOI：
10.1002/2017jd027603
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发表时间：
2018-01
期刊：
影响因子：
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通讯作者：
Chen Zhou;Hua Zhang;Shuyun Zhao;Jiangnan Li
中科院分区：
文献类型：
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作者：
Chen Zhou;Hua Zhang;Shuyun Zhao;Jiangnan Li
利用BCC_AGCM2.0_CUACE/Aero气溶胶-气候在线耦合模式，对1850年以来部分内混合（PIM）和部分外混合（EM）人为气溶胶的总有效辐射强迫（ERF）及其气候效应进行了评价和比较。考虑了内部混合对气溶胶吸湿性参数、光学性质和浓度的影响。一般来说，IM可以显著削弱人为气溶胶的负ERF和冷却效应。1850 ~ 2010年全球EM人为气溶胶年平均ERF为- 1.87 W m−2，其中气溶胶-辐射交互ERF （ERFari）和气溶胶-云交互ERF （ERFaci）分别为- 0.49和- 1.38 W m−2。1850 - 2010年，全球由PIM人为气溶胶引起的年平均ERF为- 1.23 W m−2，其中ERFari和ERFaci分别为- 0.23和- 1.01 W m−2。EM方案和PIM方案分别减少了1.74 K和0.14 mm d−1和1.28 K和0.11 mm d−1。然而，在两种混合情况下，地表附近的相对湿度都略有增加。由于北半球中纬度和低纬度的大气温度降低幅度较小，EM和PIM方案的热带辐合带均向南移动，PIM方案的热带辐合带向南移动较小。
The total effective radiative forcing (ERF) due to partial internally mixed (PIM) and externally mixed (EM) anthropogenic aerosols, as well as their climatic effects since the year of 1850, was evaluated and compared using the aerosol‐climate online coupled model of BCC_AGCM2.0_CUACE/Aero. The influences of internal mixing (IM) on aerosol hygroscopicity parameter, optical properties, and concentration were considered. Generally, IM could markedly weaken the negative ERF and cooling effects of anthropogenic aerosols. The global annual mean ERF of EM anthropogenic aerosols from 1850 to 2010 was −1.87 W m−2, of which the aerosol‐radiation interactive ERF (ERFari) and aerosol‐cloud interactive ERF (ERFaci) were −0.49 and −1.38 W m−2, respectively. The global annual mean ERF due to PIM anthropogenic aerosols from 1850 to 2010 was −1.23 W m−2, with ERFari and ERFaci of −0.23 and −1.01 W m−2, respectively. The global annual mean surface temperature and water evaporation and precipitation were reduced by 1.74 K and 0.14 mm d−1 for EM scheme and 1.28 K and 0.11 mm d−1 for PIM scheme, respectively. However, the relative humidity near the surface was slightly increased for both mixing cases. The Intertropical Convergence Zone was southwardly shifted for both EM and PIM cases but was less southwardly shifted in PIM scheme due to the less reduction in atmospheric temperature in the midlatitude and low latitude of the Northern Hemisphere.