Global Climate Impacts of Land‐Surface and Atmospheric Processes Over the Tibetan Plateau

Reviews of Geophysics, Journal Year: 2023, Volume and Issue: 61(3)

Published: Aug. 9, 2023

Abstract The Tibetan Plateau (TP) impacts local and remote atmospheric circulations, wherein it mechanically thermally affects air masses or airflows. Moreover, the TP provides a key channel for substance transport between troposphere stratosphere. This study reviews recent advances in research regarding land–atmosphere coupling processes over TP. experiences climate warming wetting. Climate has caused glacier retreat, permafrost degradation, general increase vegetation density, while wetting led to significant number of major lakes, primarily through increased precipitation. Local regional climates are affected by interactions land atmosphere. Namely, drives surface pollutants upper an Asian summer monsoon (ASM) anticyclone circulation, before spreading lower Further, thermal forcing plays essential role ASM. can modulate hemispheric‐scale circulations across all seasons. interacts with oceans forced response is substantially evolution Earth's via promoting Atlantic meridional overturning circulation eliminating Pacific circulation. extensive influence facilitated its ASM summer; whereas winter on mainly occurs Rossby waves. observed increasing trends temperature precipitation projected continue throughout 21st century.

Language: Английский

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New insights into the Asian dust cycle derived from CALIPSO lidar measurements

Remote Sensing of Environment, Journal Year: 2022, Volume and Issue: 272, P. 112906 - 112906

Published: Feb. 3, 2022

Language: Английский

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Identifying a transport mechanism of dust aerosols over South Asia to the Tibetan Plateau: A case study

The Science of The Total Environment, Journal Year: 2020, Volume and Issue: 758, P. 143714 - 143714

Published: Nov. 14, 2020

Language: Английский

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Classification of atmospheric aerosols and clouds by use of dual-polarization lidar measurements

Optics Express, Journal Year: 2021, Volume and Issue: 29(15), P. 23461 - 23461

Published: June 26, 2021

Accurate identification of aerosols and cloud from remote sensing observations is importance for quantitatively evaluating their radiative forcing related impacts. Even though polarization lidar has exhibited a unique advantage classifying atmospheric clouds over the past several decades, measurements are often achieved at one wavelength (UV or VIS) using laser sensing. To better identify types clouds, we developed ground-based dual-polarization system that can simultaneously detect wavelengths 355 nm 532 nm. Our results show volume depolarization ratios (VDRs) markedly differ typical in atmosphere. For non-spherical particles, ratio VDRs 2.87 ± 1.35 ice 1.51 0.29 dust-dominated aerosols, respectively. However, spherical 0.43 0.26 water 0.56 0.05 air pollutants. Consequently, proposed simple reliable method observed by system. The first distinguishes combination color (CR, nm/355 nm) attenuated backscattering coefficients (ABC) Then, subtypes identified based on showed remarkably improve classification compared with traditional method. This study illustrates more information be obtained multiple active

Language: Английский

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Forecasting dust impact on solar energy using remote sensing and modeling techniques

Solar Energy, Journal Year: 2021, Volume and Issue: 228, P. 317 - 332

Published: Sept. 29, 2021

Language: Английский

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Profiling Dust Mass Concentration in Northwest China Using a Joint Lidar and Sun-Photometer Setting

Remote Sensing, Journal Year: 2021, Volume and Issue: 13(6), P. 1099 - 1099

Published: March 13, 2021

The satellite-based estimation of the dust mass concentration (DMC) is essential for accurately evaluating global biogeochemical cycle aerosols. As uncertainties in estimating DMC caused by mixing and pollutants assuming a fixed value extinction efficiency (MEE), classic lidar-photometer method employed to identify separate from pollutants, obtain MEE, evaluate effect above uncertainties, during five field experiments Northwest China. Our results show that this effective continental aerosol mixtures consisting pollutants. It also seen loading mainly occurred free troposphere (<6 km), with average 905 ± 635 µg m−2 trapped planetary boundary layer. MEE ranges 0.30 0.60 m2 g−1 has significantly negative relationship size particles. With assumption 0.37 (0.60) g−1, shown be overestimated (underestimated) 20–40% (15–30%). In other words, our suggest change particles should considered DMC.

Language: Английский

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Retrieving hourly seamless PM2.5 concentration across China with physically informed spatiotemporal connection

Remote Sensing of Environment, Journal Year: 2023, Volume and Issue: 301, P. 113901 - 113901

Published: Dec. 2, 2023

Language: Английский

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Applying a dust index over North China and evaluating the contribution of potential factors to its distribution

Atmospheric Research, Journal Year: 2021, Volume and Issue: 254, P. 105515 - 105515

Published: Feb. 10, 2021

The Taklimakan and Gobi Deserts are the largest desert regions in North China. Correlations between incidence of dust events these deserts their climatic parameters have not yet been fully described. In this study, a index was defined utilizing event records, including storm, blowing dust, floating events, from 1,731 observation stations China during period 1961-2014. decreased markedly across that period, especially Desert region (TDR) (GDR). major factors contributing to trend were evaluated meteorological factors, land surface conditions, atmospheric circulation patterns, oceanic oscillations. results indicate constituted dominant contribution, accounting for 62.5% 58.0% reduction TDR GDR, respectively, with lower wind speeds playing an important role latter. Oceanic oscillations next most significant contributor, leading reductions 20.1% 32.4% respectively. Increased normalized difference vegetation values also significantly related decline observed TDR.

Language: Английский

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Dust-planetary boundary layer interactions amplified by entrainment and advections

Atmospheric Research, Journal Year: 2022, Volume and Issue: 278, P. 106359 - 106359

Published: July 25, 2022

Mineral dust contributes to more than half of the global aerosol loading. However, radiative impacts aerosols on planetary boundary layer (PBL) structure have not been explored sufficiently. During a typical storm event over Tarim Basin, exhibit well-mixed distribution during daytime in spite shallow particles accumulated at higher altitudes. By contrast, nocturnal plumes are located near surface due stable stratification. We demonstrate that these differentiated vertical distributions determine spatial heterogeneity loading, fluxes and PBL height variations. Dust cause suppression nighttime promotion through modulating atmospheric budgets. Specifically, dust-induced cooling effect within directly inhibits development. is then amplified by entrainment processes resulting excessively low height, especially for below but top. weaken updrafts from downdrafts free atmosphere, which further reduce mixing attenuating horizontal advection, eventually amplify suppression. At night, near-surface stimulate warm unstable lower generate advection heating promote Our study highlights importance specifying parameters activities quantifying dust-PBL interactions.

Language: Английский

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Improved hourly estimate of aerosol optical thickness over Asian land by fusing geostationary satellites Fengyun-4B and Himawari-9

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 923, P. 171541 - 171541

Published: March 5, 2024

Language: Английский

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