scholarly journals Impacts of interactive dust and its direct radiative forcing on interannual variations of temperature and precipitation in winter over East Asia

2017 ◽  
Vol 122 (16) ◽  
pp. 8761-8780 ◽  
Author(s):  
Sijia Lou ◽  
Lynn M. Russell ◽  
Yang Yang ◽  
Ying Liu ◽  
Balwinder Singh ◽  
...  
Keyword(s):  
East Asia ◽  
Radiative Forcing ◽  
Interannual Variations ◽  
Temperature And Precipitation ◽  
Direct Radiative Forcing

scholarly journals Impacts of East Asian Summer and Winter Monsoon on Interannual Variations of Mass Concentrations and Direct Radiative Forcing of Black Carbon over Eastern China

2016 ◽  
Author(s):  
Yu Hao Mao ◽  
Hong Liao
Keyword(s):  
Black Carbon ◽  
Radiative Forcing ◽  
Southern China ◽  
East Asian ◽  
Eastern China ◽  
Northern China ◽  
Winter Monsoon ◽  
Interannual Variations ◽  
Direct Radiative Forcing ◽  
Asian Summer

Abstract. We applied a global three-dimensional chemical transport model (GEOS-Chem) to examine the impacts of the East Asian monsoon on the interannual variations of mass concentrations and direct radiative forcing (DRF) of black carbon (BC) over eastern China (110–125° E, 20–45° N). With emissions fixed at the year 2010 levels, model simulations were driven by the Goddard Earth Observing System (GEOS-4) meteorological fields for 1986–2006 and the Modern Era Retrospective-analysis for Research and Applications (MERRA) meteorological fields for 1980–2010. During the period of 1986–2006, simulated JJA and DJF surface BC concentrations were higher in MERRA than in GEOS-4 by 0.30 µg m−3 (44 %) and 0.77 µg m−3 (54 %), respectively, because of the generally weaker precipitation in MERRA. We found that the strength of the East Asian summer monsoon (EASM, (East Asian winter monsoon, EAWM)) negatively correlated with simulated JJA (DJF) surface BC concentrations (r = –0.7 (–0.7) in GEOS-4 and –0.4 (–0.7) in MERRA), mainly by the changes in atmospheric circulation. Relative to the five strongest EASM years, simulated JJA surface BC concentrations in the five weakest monsoon years were higher over northern China (110–125° E, 28–45° N) by 0.04–0.09 µg m−3 (3–11 %), but lower over southern China (110–125° E, 20–27° N) by 0.03–0.04 µg m−3 (10–11 %). Compared to the five strongest EAWM years, simulated DJF surface BC concentrations in the five weakest monsoon years were higher by 0.13–0.15 µg m−3 (5–8 %) in northern China and by 0.04–0.10 µg m−3 (3–12 %) in southern China. The resulting JJA (DJF) mean all-sky DRF of BC at the top of the atmosphere were 0.04 W m−2 (3 %, (0.03 W m−2, 2 %)) higher in northern China but 0.06 W m−2 (14 %, (0.03 W m−2, 3 %)) lower in southern China. In the weakest monsoon years, the weaker vertical convection led to the lower BC concentrations above 1–2 km in southern China, and therefore the lower BC DRF in the region. The differences in vertical profiles of BC between the weakest and strongest EASM years (1998–1997) and EAWM years (1990–1996) reached up to –0.09 µg m−3 (–46 %) and –0.08 µg m−3 (–11 %) at 1–2 km in eastern China.

scholarly journals An Analysis of Aerosol Direct Radiative Forcing Using Satellite Data in East Asia During 2001-2010

2013 ◽  
Vol 22 (8) ◽  
pp. 1053-1062
Author(s):  
Ji-Hyun Jeong ◽  
Hak-Sung Kim ◽  
Joon-Tae Kim ◽  
Yong-Pil Park ◽  
Hyun-Jung Choi
Keyword(s):  
East Asia ◽  
Satellite Data ◽  
Radiative Forcing ◽  
Direct Radiative Forcing

Aerosol Direct Radiative Forcing over Shandong Peninsula in East Asia from 2004 to 2011

2014 ◽  
Vol 7 (1) ◽  
pp. 74-79 ◽  
Author(s):  
Xin Jin-Yuan ◽  
Zhang Qing ◽  
Gong Chong-Shui ◽  
Wang Yue-Si ◽  
Du Wu-Peng ◽  
...  
Keyword(s):  
East Asia ◽  
Radiative Forcing ◽  
Shandong Peninsula ◽  
Direct Radiative Forcing

scholarly journals Impacts of East Asian summer and winter monsoons on interannual variations of mass concentrations and direct radiative forcing of black carbon over eastern China

2017 ◽  
Vol 17 (7) ◽  
pp. 4799-4816 ◽  
Author(s):  
Yu-Hao Mao ◽  
Hong Liao ◽  
Hai-Shan Chen
Keyword(s):  
Black Carbon ◽  
Radiative Forcing ◽  
Southern China ◽  
East Asian ◽  
Eastern China ◽  
Northern China ◽  
Interannual Variations ◽  
Direct Radiative Forcing ◽  
Asian Summer ◽  
Mass Concentrations

Abstract. We applied a global three-dimensional chemical transport model (GEOS-Chem) to examine the impacts of the East Asian monsoon on the interannual variations of mass concentrations and direct radiative forcing (DRF) of black carbon (BC) over eastern China (110–125° E, 20–45° N). With emissions fixed at the year 2010 levels, model simulations were driven by the Goddard Earth Observing System (GEOS-4) meteorological fields for 1986–2006 and the Modern Era Retrospective-analysis for Research and Applications (MERRA) meteorological fields for 1980–2010. During the period of 1986–2006, simulated June–July–August (JJA) and December–January–February (DJF) surface BC concentrations were higher in MERRA than in GEOS-4 by 0.30 µg m−3 (44 %) and 0.77 µg m−3 (54 %), respectively, because of the generally weaker precipitation in MERRA. We found that the strength of the East Asian summer monsoon (EASM; East Asian winter monsoon, EAWM) negatively correlated with simulated JJA (DJF) surface BC concentrations (r = −0. 7 (−0.7) in GEOS-4 and −0.4 (−0.7) in MERRA), mainly by the changes in atmospheric circulation. Relative to the 5 strongest EASM years, simulated JJA surface BC concentrations in the 5 weakest monsoon years were higher over northern China (110–125° E, 28–45° N) by 0.04–0.09 µg m−3 (3–11 %), but lower over southern China (110–125° E, 20–27° N) by 0.03–0.04 µg m−3 (10–11 %). Compared to the 5 strongest EAWM years, simulated DJF surface BC concentrations in the 5 weakest monsoon years were higher by 0.13–0.15 µg m−3 (5–8 %) in northern China and by 0.04–0.10 µg m−3 (3–12 %) in southern China. The resulting JJA (DJF) mean all-sky DRF of BC at the top of the atmosphere was 0.04 W m−2 (3 %; 0.03 W m−2, 2 %) higher in northern China but 0.06 W m−2 (14 %; 0.03 W m−2, 3 %) lower in southern China. In the weakest monsoon years, the weaker vertical convection at the elevated altitudes led to the lower BC concentrations above 1–2 km in southern China, and therefore the lower BC DRF in the region. The differences in vertical profiles of BC between the weakest and strongest EASM years (1998–1997) and EAWM years (1990–1996) reached up to −0.09 µg m−3 (−46 %) and −0.08 µg m−3 (−11 %) at 1–2 km in eastern China.

Preliminary Simulation Research of Direct Radiative Forcing of Mineral Dust Aerosol Over East Asia Region

2005 ◽  
Vol 48 (6) ◽  
pp. 1336-1347 ◽  
Author(s):  
Jian WU ◽  
Cong-Bin FU ◽  
Wei-Mei JIANG ◽  
Hong-Nian LIU ◽  
Run-Hua ZHAO
Keyword(s):  
East Asia ◽  
Radiative Forcing ◽  
Mineral Dust ◽  
Dust Aerosol ◽  
Simulation Research ◽  
Direct Radiative Forcing ◽  
East Asia Region

Simulation of aerosol direct radiative forcing with RAMS-CMAQ in East Asia

2011 ◽  
Vol 45 (36) ◽  
pp. 6576-6592 ◽  
Author(s):  
Xiao Han ◽  
Meigen Zhang ◽  
Zhiwei Han ◽  
Jinyuan Xin ◽  
Xiaohong Liu
Keyword(s):  
East Asia ◽  
Radiative Forcing ◽  
Direct Radiative Forcing
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