Dust aerosol radiative effect and influence on urban atmospheric boundary layer

Zhang, L.; Chen, M.; Li, L.

doi:10.5194/acpd-7-15565-2007

Cited by 4 publications

(4 citation statements)

References 14 publications

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“…For example, a 1.5 level closure and 3‐D nonstationary atmospheric boundary layer (ABL) model and a radiation transfer model driven by the output of Weather Research and Forecasting Model and lidar AML‐1 are employed to simulate the dust aerosol radiative effect and its influence on ABL for the period of 23–26 January 2002, when a dust storm occurred in Beijing. The result shows that dust aerosol radiative effect heats up the atmospheric boundary layer (ABL) by a mean rate of about 0.68 K/h during daytime but cools the ABL by −0.21 K/h during night [ Zhang et al ., ]. By using the Clouds and Earth's Radiant Energy System data and the Fu‐Liou radiative transfer model, the impact of Asian dust on cloud radiative forcing during 2003–2006 is studied.…”

Section: Introductionmentioning

confidence: 99%

Composite analysis of impacts of dust aerosols on surface atmospheric variables and energy budgets in a semiarid region of China

Ling

Guo

2014

J. Geophys. Res. Atmos.

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Loess Plateau is one of the dust aerosol source regions featured by its sandy underlying surface and affected significantly by dust events. In order to investigate climatic forcing of dust aerosols in semiarid region, continuous observations of particulate matter (PM 10 concentration), meteorological elements, and energy fluxes were collected at Semiarid Climate Observatory and Laboratory in northwestern China from March to May during 2007-2010. The result shows that dusty days are often evoked under the condition when a strengthening trough is combined with the development of strong convection. During dusty days, the frequency of northerly winds increases significantly with the average wind velocity to be around 4.0 m/s; temperature is low during the daytime and high at nighttime. Relative humidity and surface pressure, however, are about 15% and 70% lower than average in dusty days, respectively. Energy balance closure is typically poor in dusty days. During daytime, the downward/upward solar radiation at land surface is less in dusty days than in nondusty days with the largest difference of 206.7 W/m 2 and 33.25 W/m 2 , respectively. Difference in downward longwave radiation between dusty and nondusty days is 35 W/m 2 , accounting for 11.7% and 14% of the daily mean for dusty and nondusty days, respectively. The net radiation flux, as well as sensible/latent heat fluxes at surface is smaller during the daytime but larger at nighttime in dusty days. The maximum differences of sensible/latent heat fluxes between dusty and nondusty days can reach for 41.9% and 12.1% of the maximum net radiation, respectively.

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Section: Introductionmentioning

confidence: 99%

Composite analysis of impacts of dust aerosols on surface atmospheric variables and energy budgets in a semiarid region of China

Ling

Guo

2014

J. Geophys. Res. Atmos.

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“… Meloni et al [2005] found that SW aerosol radiative forcing at TOA is strongly dependent on aerosol vertical profiles. Substantial magnitude and large uncertainties were found for aerosol radiative forcing in some heavily polluted regions [ Li , 1998; Satheesh and Ramanathan , 2000; Huang et al , 2008c; Zhang et al , 2007]. Ramanathan et al [2001] suggested that a combination of the aerosol direct and indirect effects could weaken the hydrological cycle, which could be a major environmental issue during this century.…”

Section: Introductionmentioning

confidence: 99%

Dust aerosol vertical structure measurements using three MPL lidars during 2008 China‐U.S. joint dust field experiment

Huang

et al. 2010

J. Geophys. Res.

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[1] The 2008 China-U.S. joint dust field experiment, which aims to estimate the effect of dust on radiative forcing and its associated climatic impacts, was conducted during the dust-intensive period from March to June of 2008 over the Loess Plateau of northwest China. Dust aerosol vertical profiles and long-range transport of dust storm were measured with the three MPL-net Micro-Pulse Lidar (MPL) systems as well as other ground-based instruments and spaceborne remote sensing techniques. In this study, to ensure the effectiveness of the retrieval results, an effective algorithm was introduced for retrieving aerosol optical properties and vertical profiles from Mie lidar measurements. The advantage of this algorithm is that Aerosol Optical Depth (AOD) retrieval from lidar measurements can be accomplished without the use of the so-called lidar ratio for the corresponding quantities obtained from the AERONET Sun photometer. Dust aerosol vertical profiles are derived successfully from three MPL lidar systems using this algorithm. A dust storm that affected a large part of northwest China on 2 May 2008 was studied using measurements obtained from the three ground-based lidar systems, satellite-borne instruments and NCEP reanalysis data. The results show that different aerosol vertical structures were present at each site, and the colder Siberia air mass and stronger and longer cyclones around Mongolia are key features leading to the dust storm.

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“…The dust aerosol severely affects the local climate and environment by influencing the atmospheric radiation balance and decreasing atmospheric visibility (Wang et al, 2005). Recent years have witnessed numerous studies on the aerosol radiative properties (Blanco et al, 2003;Gobbi et al, 2003;Immler et al, 2003;Collaud Coen et al, 2004;Papayannis et al, 2005;Balkanski et al, 2007;Zhang et al, 2007;Su et al, 2008;Hong et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

A case study of dust aerosol radiative properties over Lanzhou, China

Zhang¹,

Cao²,

Bao³

et al. 2010

Preprint

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Abstract. The vertical distribution of dust aerosol and its radiative properties are analysed using the data measured by the micropulse lidar, profiling microwave radiometer, sunphotometer, particulate monitor, and nephelometer at the Semi-Arid Climate and Environment Observatory of Lanzhou University (SACOL) during a dust storm from 27 March to 29 March 2007. The analysis shows that the dust aerosol mainly exists below 2 km in height, and the dust aerosol extinction coefficient decreases with height. The temporal evolution of aerosol optical depth (AOD) during the dust storm is characterized by a sub-maximum at 22:00 (Beijing Time) on 27 March and a maximum at 12:00 on 28 March. The AOD derived by lidar is compared with that obtained by sunphotometer, and shows a good consistency. The PM10 concentration and aerosol scattering coefficient share identical variation trends, and their maximums both appear at 22:00 on 27 March. The aerosol extinction coefficient and relative humidity have the same trends and their maximums appear at identical heights, showing a correlation between extinction coefficient and relative humidity known as aerosol hygroscopicity. Nevertheless, the correlation between aerosol extinction coefficient and temperature cannot be obviously seen. The aerosol extinction coefficient, scattering coefficient, and PM10 concentration present good linear correlations. The correlation coefficients of the aerosol scattering coefficient and PM10 concentration, of aerosol extinction coefficient and PM10 concentration, and of aerosol extinction and scattering coefficient are respectively 0.98, 0.94, and 0.96.

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Dust aerosol radiative effect and influence on urban atmospheric boundary layer

Cited by 4 publications

References 14 publications

Composite analysis of impacts of dust aerosols on surface atmospheric variables and energy budgets in a semiarid region of China

Composite analysis of impacts of dust aerosols on surface atmospheric variables and energy budgets in a semiarid region of China

Dust aerosol vertical structure measurements using three MPL lidars during 2008 China‐U.S. joint dust field experiment

A case study of dust aerosol radiative properties over Lanzhou, China

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