DOI: 10.1016/j.atmosres.2018.01.012
Scopus记录号: 2-s2.0-85044259003
论文题名: Assessment of 1D and 3D model simulated radiation flux based on surface measurements and estimation of aerosol forcing and their climatological aspects
作者: Subba T. ; Gogoi M.M. ; Pathak B. ; Ajay P. ; Bhuyan P.K. ; Solmon F.
刊名: Atmospheric Research
ISSN: 1698095
出版年: 2018
卷: 204 起始页码: 110
结束页码: 127
语种: 英语
英文关键词: Aerosol radiative forcing efficiency
; Heating rate
; RegCM4.4
; SBDART
; Solar radiation
; Surface albedo
Scopus关键词: Atmospheric aerosols
; Atmospheric radiation
; Atmospheric thermodynamics
; Carbon
; Climate models
; Efficiency
; Heating rate
; Radiometers
; Solar radiation
; Surface measurement
; Aerosol radiative forcing
; Atmospheric heating rate
; Atmospheric transmissions
; Correlation coefficient
; RegCM4.4
; SBDART
; Solar-radiation fluxes
; Surface albedo
; Aerosols
; aerosol
; albedo
; estimation method
; heating
; measurement method
; one-dimensional modeling
; radiative forcing
; solar radiation
; three-dimensional modeling
英文摘要: Ground reaching solar radiation flux was simulated using a 1-dimensional radiative transfer (SBDART) and a 3-dimensional regional climate (RegCM 4.4) model and their seasonality against simultaneous surface measurements carried out using a CNR4 net Radiometer over a sub-Himalayan foothill site of south-east Asia was assessed for the period from March 2013–January 2015. The model simulated incoming fluxes showed a very good correlation with the measured values with correlation coefficient R2 ~0.97. The mean bias errors between these two varied from −40 W m−2 to +7 W m−2 with an overestimation of 2–3% by SBDART and an underestimation of 2–9% by RegCM. Collocated measurements of the optical parameters of aerosols indicated a reduction in atmospheric transmission path by ~20% due to aerosol load in the atmosphere when compared with the aerosol free atmospheric condition. Estimation of aerosol radiative forcing efficiency (ARFE) indicated that the presence of black carbon (BC, 10–15%) led to a surface dimming by −26.14 W m−2 τ−1 and a potential atmospheric forcing of +43.04 W m−2 τ−1. BC alone is responsible for >70% influence with a major role in building up of forcing efficiency of +55.69 W m−2 τ−1 (composite) in the atmosphere. On the other hand, the scattering due to aerosols enhance the outgoing radiation at the top of the atmosphere (ARFETOA ~−12.60 W m−2 ω−1), the absence of which would have resulted in ARFETOA of ~+16.91 W m−2 τ−1 (due to BC alone). As a result, ~3/4 of the radiation absorption in the atmosphere is ascribed to the presence of BC. This translated to an atmospheric heating rate of ~1.0 K day−1, with ~0.3 K day−1 heating over the elevated regions (2–4 km) of the atmosphere, especially during pre-monsoon season. Comparison of the satellite (MODIS) derived and ground based estimates of surface albedo showed seasonal difference in their magnitudes (R2 ~0.98 during retreating monsoon and winter; ~0.65 during pre-monsoon and monsoon), indicating that the reliability of the satellite data for aerosol radiative forcing estimation is more during the retreating and winter seasons. © 2018 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/108926
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Centre for Atmospheric Studies, Dibrugarh University, Dibrugarh, 786004, India; Department of Physics, Dibrugarh University, ISRO, Dibrugarh, 786004, India; Space Physics Laboratory, Vikram Sarabhai Space Centre, ISRO, Trivandrum, 695022, India; Laboratoir d'Aerologie, Observatoir Midi-Pyrenees, Toulouse, France
Recommended Citation:
Subba T.,Gogoi M.M.,Pathak B.,et al. Assessment of 1D and 3D model simulated radiation flux based on surface measurements and estimation of aerosol forcing and their climatological aspects[J]. Atmospheric Research,2018-01-01,204