Estimation of the Aerosol Radiative Effect over the Tibetan Plateau Based on the Latest CALIPSO Product

Jia, Rui; Liu, Yuzhi; Su, Hua; Qi, Zhu; Shao, Tianbin

doi:10.1007/s13351-018-8060-3

Cited by 40 publications

(23 citation statements)

References 59 publications

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“…As reported by previous studies (Huang et al, ; Jia et al, ), dust is the dominant aerosol type over the TP because the TP is located at the junction of several dust sources, including the Taklimakan desert, Gurbantunggut desert, and Great Indian Thar desert. The absorption feature of transported dust may contribute to atmospheric heating and surface cooling (Jia et al, ) and significantly accelerate snow melting and the vertical thermal structure over the TP (Lau et al, ; Wu et al, , ). Due to surface cooling and heating in the atmosphere induced by dust aerosols, the stability of the atmosphere is enhanced, causing an accumulation of dust particles in the atmosphere and influencing the development of clouds.…”

Section: Conclusion and Discussionmentioning

confidence: 99%

“…Thus, under warmer climate conditions over the TP, the aerosol‐cloud interaction is an important physical process contributing to the hydrological cycle surrounding the TP. In recent studies, much effort has been focused on the aerosol (Jia et al, ; Liu et al, ) and cloud properties (Fujinami & Yasunari, ; Hua et al, ; Li & Fu, ; Sato et al, ; Taniguchi & Koike, ) over the TP; however, there are few studies on the relationship between aerosols and clouds.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Aerosols on the Ice Cloud Properties Over the Tibetan Plateau

Liu

Jia

et al. 2019

JGR Atmospheres

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With the highlight of environmental problems over the Tibetan Plateau (TP), aerosol pollution and the influence of this pollution on cloud properties are becoming a new area of research. Based on the aerosol index and cloud property parameters derived from satellite observations, in this study, the inconsistent effects of aerosols on ice cloud properties between daytime and nighttime over the TP are investigated. The results indicate that ice clouds are mainly distributed over the TP margin area, especially over the north slope, during both daytime and nighttime. The occurrence frequency of ice cloud is higher during the daytime than during the nighttime over the margin areas of the TP. Similarly, aerosols are mainly concentrated over the northern margin of the TP. A potential relationship may exist between the aerosol index and ice cloud properties. When the aerosol index increases from 0.05 to 0.17, the ice cloud droplet radius (ICDR) during the daytime decreases from 32.1 to 27.9 μm, while the ICDR during the nighttime remains almost constant (approximately 25 μm); furthermore, the ice water path (IWP) during the daytime decreases slightly due to the saturation effect, while the nocturnal IWP increases significantly. The changes in ice cloud optical depth (ICOD) during daytime and nighttime show significant and completely opposite trends. The removal of the influence of meteorological factors showed that aerosols have a more dominant influence than meteorological conditions on ice cloud properties (except for the nocturnal ICDR and IWP during the daytime).

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Section: Conclusion and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Aerosols on the Ice Cloud Properties Over the Tibetan Plateau

Liu

Jia

et al. 2019

JGR Atmospheres

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“…Liu et al () examined the aerosol optical properties and their associated radiative effects based on sky‐radiometer and surface solar radiation data in the spring over the Loess Plateau in northwest China. Y. G. Liu et al (2015) and Jia et al () examined aerosol transport to the TP and the dust‐induced heating effect over the TP using satellite data, a radiative transfer model, and the Spectral Radiation‐Transport Model for Aerosol Species. The aerosol index observed by the Ozone Monitoring Instrument shows that absorbing aerosols are distributed over the northern and southern slopes of the TP, corresponding to dust and carbonaceous aerosols, respectively.…”

Section: Aerosol Formation Nucleation Optical Properties and Radiamentioning

confidence: 99%

East Asian Study of Tropospheric Aerosols and their Impact on Regional Clouds, Precipitation, and Climate (EAST‐AIR_CPC)

et al. 2019

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Aerosols have significant and complex impacts on regional climate in East Asia. Cloud‐aerosol‐precipitation interactions (CAPI) remain most challenging in climate studies. The quantitative understanding of CAPI requires good knowledge of aerosols, ranging from their formation, composition, transport, and their radiative, hygroscopic, and microphysical properties. A comprehensive review is presented here centered on the CAPI based chiefly, but not limited to, publications in the special section named EAST‐AIRcpc concerning (1) observations of aerosol loading and properties, (2) relationships between aerosols and meteorological variables affecting CAPI, (3) mechanisms behind CAPI, and (4) quantification of CAPI and their impact on climate. Heavy aerosol loading in East Asia has significant radiative effects by reducing surface radiation, increasing the air temperature, and lowering the boundary layer height. A key factor is aerosol absorption, which is particularly strong in central China. This absorption can have a wide range of impacts such as creating an imbalance of aerosol radiative forcing at the top and bottom of the atmosphere, leading to inconsistent retrievals of cloud variables from space‐borne and ground‐based instruments. Aerosol radiative forcing can delay or suppress the initiation and development of convective clouds whose microphysics can be further altered by the microphysical effect of aerosols. For the same cloud thickness, the likelihood of precipitation is influenced by aerosols: suppressing light rain and enhancing heavy rain, delaying but intensifying thunderstorms, and reducing the onset of isolated showers in most parts of China. Rainfall has become more inhomogeneous and more extreme in the heavily polluted urban regions.

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“…However, in the past two decades, the TP has been surrounded by an unprecedented growth of emissions of Asian air pollutants from various sources. Consequently, some studies have demonstrated that the aerosols transported from its surrounding areas (South Asia and Taklimakan Desert) have polluted the TP (Huang et al, 2007;Xia et al, 2011;Kopacz et al, 2011;Lu et al, 2012;Zhu et al, 2018;Jia et al, 2015Jia et al, , 2019. The increase in aerosols over the TP may have an important impact on the regional or global climate.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, Liu et al (2019b) found the effect of the dust aerosols over the TP on the development of convective clouds and then movement of the some developed convective clouds could induce significant precipitation over the Yangtze River basin and North China. Attempts have been made to reveal the linkages between climate change (such as changes to glaciers and monsoons) and the air pollutants around the TP (mainly absorbing carbonaceous materials) (Qian et al, 2011;Lee et al, 2013;Jia et al, 2018). However, the quantitative effect of the TP aerosol on climate variability remains largely unknown, and it is very essential to fully understand the aerosol characteristics over the TP.…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal variation of aerosol and potential long-range transport impact over the Tibetan Plateau, China

et al. 2019

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Abstract. The long-term temporal–spatial variations in the aerosol optical properties over the Tibetan Plateau (TP) and the potential long-range transport from surrounding areas to the TP were analyzed in this work, by using multiple years of sun photometer measurements (CE318) at five stations in the TP, satellite aerosol products from the Moderate Resolution Imaging Spectroradiometer (MODIS) and Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP), back-trajectory analysis from the Hybrid Single Particle Lagrangian Integrated Trajectory (HYSPLIT) and model simulations from the Goddard Earth Observing System (GEOS)-Chem chemistry transport model. The results from the ground-based observations showed that the annual aerosol optical depth (AOD) at 440 nm at most TP sites increased in recent decades with trends of 0.001±0.003 yr−1 at Lhasa, 0.013±0.003 yr−1 at Mt_WLG, 0.002±0.002 yr−1 at NAM_CO and 0.000±0.002 yr−1 at QOMS_CAS. The increasing trend was also found for the aerosol extinction Ångström exponent (EAE) at most sites with the exception of the Mt_WLG site. Spatially, the AOD at 550 nm observed from MODIS showed negative trends at the northwest edge close to the Taklimakan Desert and to the east of the Qaidam Basin and slightly positive trends in most of the other areas of the TP. Different aerosol types and sources contributed to a polluted day (with CE318 AOD at 440 nm > 0.4) at the five sites on the TP: dust was the dominant aerosol type in Lhasa, Mt_WLG and Muztagh with sources in the Taklimakan Desert, but fine-aerosol pollution was dominant at NAM_CO and QOMS_CAS with transport from South Asia. A case of aerosol pollution at Lhasa, NAM_CO and QOMS_CAS during 28 April–3 May 2016 revealed that the smoke aerosols from South Asia were lifted up to 10 km and transported to the TP, while the dust from the Taklimakan Desert could climb the north slope of the TP and then be transported to the central TP. The long-range transport of aerosol thereby seriously impacted the aerosol loading over the TP.

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Estimation of the Aerosol Radiative Effect over the Tibetan Plateau Based on the Latest CALIPSO Product

Cited by 40 publications

References 59 publications

Effect of Aerosols on the Ice Cloud Properties Over the Tibetan Plateau

Effect of Aerosols on the Ice Cloud Properties Over the Tibetan Plateau

East Asian Study of Tropospheric Aerosols and their Impact on Regional Clouds, Precipitation, and Climate (EAST‐AIR_CPC)

Spatiotemporal variation of aerosol and potential long-range transport impact over the Tibetan Plateau, China

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Estimation of the Aerosol Radiative Effect over the Tibetan Plateau Based on the Latest CALIPSO Product

Cited by 40 publications

References 59 publications

Effect of Aerosols on the Ice Cloud Properties Over the Tibetan Plateau

Effect of Aerosols on the Ice Cloud Properties Over the Tibetan Plateau

East Asian Study of Tropospheric Aerosols and their Impact on Regional Clouds, Precipitation, and Climate (EAST‐AIRCPC)

Spatiotemporal variation of aerosol and potential long-range transport impact over the Tibetan Plateau, China

Contact Info

Product

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About

East Asian Study of Tropospheric Aerosols and their Impact on Regional Clouds, Precipitation, and Climate (EAST‐AIR_CPC)