scholarly journals Estimation of Direct Radiative Forcing of Asian Dust Aerosols with Sun/Sky Radiometer and Lidar Measurements at Gosan, Korea

2004 ◽  
Vol 82 (1) ◽  
pp. 115-130 ◽  
Author(s):  
Jae-Gwang WON ◽  
Soon-Chang YOON ◽  
Sang-Woo KIM ◽  
Ann JEFFERSON ◽  
Ellsworth G DUTTON ◽  
...  
Keyword(s):  
Radiative Forcing ◽  
Asian Dust ◽  
Dust Aerosols ◽  
Lidar Measurements ◽  
Direct Radiative Forcing

Possible influences of Asian dust aerosols on cloud properties and radiative forcing observed from MODIS and CERES

2006 ◽  
Vol 33 (6) ◽  
Author(s):  
Jianping Huang ◽  
Patrick Minnis ◽  
Bing Lin ◽  
Tianhe Wang ◽  
Yuhong Yi ◽  
...  
Keyword(s):  
Radiative Forcing ◽  
Asian Dust ◽  
Dust Aerosols ◽  
Cloud Properties

scholarly journals Influence of the vertical absorption profile of mixed Asian dust plumes on aerosol direct radiative forcing over East Asia

2016 ◽  
Vol 138 ◽  
pp. 191-204 ◽  
Author(s):  
Young Min Noh ◽  
Kwonho Lee ◽  
Kwanchul Kim ◽  
Sung-Kyun Shin ◽  
Detlef Müller ◽  
...  
Keyword(s):  
East Asia ◽  
Radiative Forcing ◽  
Asian Dust ◽  
Absorption Profile ◽  
Direct Radiative Forcing

scholarly journals Effect of Direct Radiative Forcing of Asian Dust on the Meteorological Fields in East Asia during an Asian Dust Event Period

2007 ◽  
Vol 46 (10) ◽  
pp. 1655-1681 ◽  
Author(s):  
Hyun-Ju Ahn ◽  
Soon-Ung Park ◽  
Lim-Seok Chang
Keyword(s):  
Negative Pressure ◽  
Radiative Forcing ◽  
Stable Stratification ◽  
Asian Dust ◽  
Dust Aerosol ◽  
Positive Pressure ◽  
Pressure Perturbation ◽  
Dust Event ◽  
Direct Radiative Forcing ◽  
Upper Level

Abstract Coupled and noncoupled models in a grid of 60 × 60 km2 in the eastern Asian domain have been employed to examine the effect of the direct radiative forcing of the Asian dust aerosol on meteorological fields for an intense Asian dust event observed in eastern Asia on 18–23 March 2002. The coupled model consists of the modified fifth-generation Pennsylvania State University–National Center for Atmospheric Research (NCAR) Mesoscale Model (MM5) with direct radiative forcing of the Asian dust aerosol through the NCAR Column Radiation Model and the Asian Dust Aerosol Model. The noncoupled model is MM5 without the direct radiative forcing of the Asian dust aerosol. The results indicate that the radiative cooling of the dust aerosol over the high-dust-concentration (HDC) region induces sinking motion and positive pressure perturbation near the surface, whereas the radiative warming of the aerosol near the top of the HDC layer induces rising motion and negative pressure perturbation, thereby enhancing the stable stratification in the dust layer. The induced positive pressure perturbation near the surface causes a dipole shape of the pressure perturbation field by forming a negative pressure perturbation toward the low pressure center downstream near the surface. This negative pressure perturbation is so deep and wide that the perturbation of the meteorological fields extends in the wide and deep regions away from the HDC region. The associated secondary circulation of this pressure perturbation reduces the low-level wind speed in the upstream HDC region but strengthens the downstream wind speed, resulting in reduction of dust emission in the upstream source region and downstream enhancement. Some of the dust aerosols lifted to the higher level by the synoptic rising motion are transported to the downstream direction more quickly with the upper-level strong wind, resulting in a bent-over shape of dust cloud in the downstream region with a maximum concentration near the surface and a secondary maximum in the upper level. The radiative flux convergence between these maximum dust layers produces a warm layer, thereby further enhancing the stable stratification.

Temporal behaviour of Asian dust aerosols observed in 2001 using meteorological satellite data

2004 ◽  
Vol 4 (3) ◽  
pp. 208 ◽  
Author(s):  
Naoko Iino ◽  
Toshiaki Yano ◽  
Toshikatsu Masumizu ◽  
Kisei Kinoshita ◽  
Itsushi Uno ◽  
...  
Keyword(s):  
Satellite Data ◽  
Asian Dust ◽  
Temporal Behaviour ◽  
Dust Aerosols ◽  
Meteorological Satellite

scholarly journals Estimates of direct radiative forcing due to aerosols from the MERRA-2 reanalysis over the Amazon region

2018 ◽  
Author(s):  
Brunna Penna ◽  
Dirceu Herdies ◽  
Simone Costa
Keyword(s):  
Radiative Forcing ◽  
Reanalysis Data ◽  
Amazon Region ◽  
Reference State ◽  
Aerosol Radiative Forcing ◽  
Aerosol Loading ◽  
Direct Radiative Forcing ◽  
Direct Forcing ◽  
The Difference ◽  
Natural Aerosols

Abstract. Sixteen years of analysis of clear-sky direct aerosol radiative forcing is presented for the Amazon region, with calculations of AERONET network, MODIS sensor and MERRA-2 reanalysis data. The results showed that MERRA-2 reanalysis is an excellent tool for calculating and providing the spatial distribution of aerosol direct radiative forcing. In addition, the difference between considering the reference state of the atmosphere without aerosol loading and with natural aerosol to obtain the aerosol direct radiative forcing is discussed. During the dry season, the monthly average direct forcing at the top of atmosphere varied from −9.60 to −4.20 Wm−2, and at the surface, it varied from −29.81 to −9.24 Wm−2, according to MERRA-2 reanalysis data and the reference state of atmosphere without aerosol loading. Already with the state of reference being the natural aerosols, the average direct forcing at the top of atmosphere varied from −5.15 to −1.18 Wm−2, and at the surface, it varied from −21.28 to −5.25 Wm−2; this difference was associated with the absorption of aerosols.

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