DOI: 10.1016/j.atmosenv.2019.117237
论文题名: Absorbing aerosol influence on temperature maxima: An observation based study over India
作者: Dave P. ; Bhushan M. ; Venkataraman C.
刊名: Atmospheric Environment
ISSN: 1352-2310
出版年: 2020
卷: 223 语种: 英语
英文关键词: Aerosols
; Climatology
; Greenhouse gases
; Soil moisture
; Statistical mechanics
; Statistical tests
; Absorbing aerosol
; Absorbing aerosol indices
; Atmospheric blocking
; Granger Causality
; Ground-based observations
; Observational study
; Statistical tools
; Surface temperatures
; Atmospheric temperature
; absorption
; aerosol
; greenhouse gas
; heat wave
; observational method
; soil moisture
; surface pressure
; surface temperature
; temperature effect
; aerosol
; article
; heat
; India
; observational study
; India
学科: Absorbing aerosols
; Granger causality
; Surface temperature maxima
中文摘要: Increasing trends in summer-time temperature maxima (Tmax) over India, show consequent increases in the intensity and frequency of heatwave events in recent years. Heat waves have been largely attributed to large-scale meteorological blocking, characterized by subsidence, clear skies and low soil moisture, in observational studies, or greenhouse gas enhancements in model studies. While radiative effects of absorbing aerosols are acknowledged, the association of absorbing aerosols with temperature maxima has not been investigated comprehensively. In the current study, statistical tools (such as correlation and Granger causality) were applied to long term (1979–2013) satellite and ground based observations to evaluate influence of absorbing aerosols on Tmax in north-west India (Tmax-NW). Regional absorbing aerosol index (AAI) in the north-west (AAI-NW) and central-India (AAI-CI) showed co-variability with Tmax-NW, implying connections to both local and non-local absorbing aerosols. The effects persisted on seasonal and heatwave event scales, becoming stronger on heatwave days with presence of enhanced AAI loadings. Causal effects of AAI-NW and AAI-CI were identified on Tmax-NW with a lag of 1–11 days, across multiple years, thereby establishing the influence of absorbing aerosols on heatwave events. The absence of confounding effects of surface pressure on these links suggests that, even during heat wave events linked to atmospheric blocking, absorbing aerosols can further enhance temperature maxima and related heatwave intensity. © 2019 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/160550
Appears in Collections: 气候变化与战略
There are no files associated with this item.
作者单位: Interdisciplinary Programme in Climate Studies, Indian Institute of Technology Bombay, Mumbai, 400076, India; Department of Chemical Engineering, Indian Institute of Technology Bombay, Mumbai, 400076, India
Recommended Citation:
Dave P.,Bhushan M.,Venkataraman C.. Absorbing aerosol influence on temperature maxima: An observation based study over India[J]. Atmospheric Environment,2020-01-01,223