Anthropogenic Direct Radiative Forcing of Tropospheric Ozone and Aerosols in 1850 and 2000 Estimated with IPCC AR5 Emissions Inventories  

作　　者：CHANG Wen-Yuan LIAO Hong 

机构地区：[1]State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry （LAPC）, Institute of Atmospheric Physics, . Chinese Academy of Sciences, Beijing 100029, China [2]Graduate University of Chinese Academy of Sciences, Beijing 100049, China

出　　处：《Atmospheric and Oceanic Science Letters》2009年第4期201-207,共7页大气和海洋科学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos.90711004 and40825016);the Chinese Academy of Sciences (Grant Nos.KZCX2-YW-Q1 and KZCX2-YW-Q11-03)

摘　　要：This study estimates direct radiative forcing by tropospheric ozone and all aerosols between the years 1850 and 2000, using the new IPCC AR5 （the Intergovernmental Panel on Climate Change Fifth Assessment Report） emissions inventories and a fully coupled chemistry-aerosol general circulation model. As compared to the previous Global Emissions Inventory Activity （GEIA） data, that have been commonly used for forcing estimates since 1990, the IPCC AR5 emissions inventories report lower anthropogenic emissions of organic carbon and black carbon aerosols and higher sulfur and NOx emissions. The simulated global and annual mean burdens of sulfate, nitrate, black carbon （BC）, primary organic aerosol （POA）, secondary organic aerosol （SOA）, and ozone were 0.79, 0.35, 0.05, 0.49, 0.34, and 269 Tg, respectively, in the year 1850, and 1.90, 0.90, 0.11, 0.71, 0.32, and 377 Tg, respectively, in the year 2000. The estimated annual mean top of the atmosphere （TOA） direct radiative forcing of all anthropogenic aerosols based on the AR5 emissions inventories is -0.60 W m^-2 on a global mean basis from 1850 to 2000. However, this is -2.40 W m-2 when forcing values are averaged over eastern China （18-45°N and 95-125°E）. The value for tropospheric ozone is 0.17 W m^-1 on a global mean basis and 0.24 W m^-2 over eastern China. Forcing values indicate that the climatic effect of aerosols over eastern China is much more significant than the globally averaged effect.This study estimates direct radiative forcing by tropospheric ozone and all aerosols between the years 1850 and 2000,using the new IPCC AR5 (the Intergov-ernmental Panel on Climate Change Fifth Assessment Report) emissions inventories and a fully coupled chem-istry-aerosol general circulation model.As compared to the previous Global Emissions Inventory Activity (GEIA) data,that have been commonly used for forcing estimates since 1990,the IPCC AR5 emissions inventories report lower anthropogenic emissions of organic carbon and black carbon aerosols and higher sulfur and NO x emis-sions.The simulated global and annual mean burdens of sulfate,nitrate,black carbon (BC),primary organic aero-sol (POA),secondary organic aerosol (SOA),and ozone were 0.79,0.35,0.05,0.49,0.34,and 269 Tg,respectively,in the year 1850,and 1.90,0.90,0.11,0.71,0.32,and 377 Tg,respectively,in the year 2000.The estimated annual mean top of the atmosphere (TOA) direct radiative forc-ing of all anthropogenic aerosols based on the AR5 emis-sions inventories is-0.60 W m-2 on a global mean basis from 1850 to 2000.However,this is-2.40 W m-2 when forcing values are averaged over eastern China (18-45°N and 95-125°E).The value for tropospheric ozone is 0.17 W m-2 on a global mean basis and 0.24 W m-2 over east-ern China.Forcing values indicate that the climatic effect of aerosols over eastern China is much more significant than the globally averaged effect.

关 键 词：IPCC AR5 emissions inventories AEROSOLS tropospheric ozone direct radiative forcing 

分 类 号：P422[天文地球—大气科学及气象学] P467