Long-term trends of dust events over Tibetan Plateau during 1961–2010

Kang, Litai; Huang, Jianping; Chen, Siyu; Wang, Xin

doi:10.1016/j.atmosenv.2015.10.085

Cited by 96 publications

(54 citation statements)

References 68 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The shift in the trend of PC1 after 2010 is evidenced by the opposite tendency in dust AOD, which shows a significant negative trend (about −5 × 10 -4 /year) during the time period 2010 to 2016 (Figure 5b). This decreasing tendency in springtime dust AOD during the last decade over EA has been noticed in recent studies (e.g., Kang et al, 2016), which should be interpreted carefully when compared to the previous studies. However, they did not perform the change point detection for the year-to-year records of dust, and their study periods generally included the active dust emission period during 2007-2010.…”

Section: The Dominant Mode and Shift In Springtime Dust Trends Over Esupporting

confidence: 77%

The Trend Reversal of Dust Aerosol Over East Asia and the North Pacific Ocean Attributed to Large‐Scale Meteorology, Deposition, and Soil Moisture

Guo

Liu

et al. 2019

JGR Atmospheres

View full text Add to dashboard Cite

The long‐term trend in dust loading over East Asia remains under debate and is dependent on the study period chosen. In this study, the long‐term trends in springtime dust over East Asia and the North Pacific Ocean (NPO) during 1980–2017 were examined based on the Modern‐Era Retrospective Analysis for Research and Applications version 2 reanalysis. Results showed that there was a spatial gradient in dust aerosol loadings, with decreases from western China eastward toward the NPO. This pattern was corroborated by Cloud‐Aerosol Lidar with Orthogonal Polarization observations. Furthermore, the empirical orthogonal function method was used to reveal the leading modes of springtime dust aerosol optical depth (AOD) over East Asia and the NPO. An abrupt shift occurred in the dust AOD trend in 2010 for the empirical orthogonal function 1 mode. The dust AOD increased at a rate of approximately 2 × 10‐4/year during 1999–2009 and then decreased more sharply (around 5 × 10‐4/year) afterward. This trend reversal of dust AOD was closely associated with a decrease in 10‐m wind velocity, which induces reduced dust emission. Compared with 10‐m wind, the soil moisture is less correlated with the trend reversal in dust AOD. Additionally, the trends of dry (wet) deposition were closely associated with the trends of the dust AOD, especially for the period 2010–2016. Overall, our findings add new insights to the long‐term nonlinear variability of dust.

show abstract

Section: The Dominant Mode and Shift In Springtime Dust Trends Over Esupporting

confidence: 77%

The Trend Reversal of Dust Aerosol Over East Asia and the North Pacific Ocean Attributed to Large‐Scale Meteorology, Deposition, and Soil Moisture

Guo

Liu

et al. 2019

JGR Atmospheres

View full text Add to dashboard Cite

show abstract

“…On 20 April 2008 (a day prior the peak dust event day), the CALIOP precisely detected a thick layer of dust It should be noted that, beside the long-range transport from desert, local dust may also contribute to the aerosol load in TP. Particularly in spring, the loose ground surface after snow melting is a source of blowing/floating dust (Kang et al, 2016). Therefore, more study is needed to quantify the relative importance of local and long-range transported dust.…”

Section: A Case Study Of Dust Eventmentioning

confidence: 99%

Aerosol Properties Over Tibetan Plateau From a Decade of AERONET Measurements: Baseline, Types, and Influencing Factors

et al. 2019

View full text Add to dashboard Cite

In this study, a decade long measurement of aerosol optical properties at two AERONET stations (Nam Co during 2006–2016 and QOMS during 2009–2017) in the Tibetan Plateau (TP), a region sensitive to climate change and human perturbation, is presented. The baseline value of aerosol optical depth (AOD) was 0.029 and 0.027 at Nam Co and QOMS, respectively, which are comparable to or even lower than those at some Arctic and remote ocean locations. The seasonality of AOD values were the order of spring > summer > winter > autumn. Based on AOD and Ångström exponent (α), major aerosol types over the TP were further identified as continental background, biomass burning, and dust. Although continental background aerosol was the main feature in remote areas of TP, biomass burning plumes frequently occurred, especially during spring (March–April). In one of such biomass burning event in April 2014, MODIS observations demonstrated that intensive open fires occurred in South Asia, covering the foothills of Himalayas and Indo‐Gangetic Plain. The air mass back trajectories and CALIOP observations further revealed that biomass burning plume could be uplifted to higher altitudes and reach the Himalayas. Moreover, an occasional dust event detected in April 2008 over the TP demonstrated that the dust from Taklamakan Desert may impact the main body of TP episodically, although the local dust from the inside of TP cannot be excluded and warrants further study.

show abstract

“…Based on this data, dust index for China during 1970-2010 is further calculated. The details of the method used for the calculation are described in Wang et al [75], Kang et al [76] and Yuan et al [77].…”

Section: Methodsmentioning

confidence: 99%

The Spatial and Temporal Distributions of Absorbing Aerosols over East Asia

et al. 2017

Self Cite

View full text Add to dashboard Cite

Abstract:Absorbing aerosols can strongly absorb solar radiation and have a profound impact on the global and regional climate. Black carbon (BC), organic carbon (OC) and dust are three major types of absorbing aerosols. In order to deepen the overall understanding of absorbing aerosols over East Asia and provide a basis for further investigation of its role in enhanced warming in drylands, the spatial-temporal distribution of absorbing aerosols over East Asia for the period of 2005-2016 was investigated based on the Ozone Monitoring Instrument (OMI) satellite retrievals. Overall, high values of Aerosol Absorption Optical Depth (AAOD) mainly distribute near dust sources as well as BC and OC sources. AAOD reaches its maximum during spring over East Asia as a result of dust activity and biomass burning. Single-scattering albedo (SSA) is comparatively high (>0.96) in the most part of East Asia in the summer, indicating the dominance of aerosol scattering. Hyper-arid regions have the highest Aerosol Optical Depth (AOD) and AAOD among the five climatic regions, with springtime values up to 0.72 and 0.04, respectively. Humid and sub-humid regions have relatively high AOD and AAOD during the spring and winter and the highest SSA during the summer. AAOD in some areas shows significant upward trends, which is likely due to the increase of BC and OC emission. SSA shows overall downward trends, indicating the enhancement of the aerosol absorption. Analysis of emission inventory and dust index data shows that BC and OC emissions mainly come from the humid regions, while dust sources mainly distribute in drylands.

show abstract

Long-term trends of dust events over Tibetan Plateau during 1961–2010

Cited by 96 publications

References 68 publications

The Trend Reversal of Dust Aerosol Over East Asia and the North Pacific Ocean Attributed to Large‐Scale Meteorology, Deposition, and Soil Moisture

The Trend Reversal of Dust Aerosol Over East Asia and the North Pacific Ocean Attributed to Large‐Scale Meteorology, Deposition, and Soil Moisture

Aerosol Properties Over Tibetan Plateau From a Decade of AERONET Measurements: Baseline, Types, and Influencing Factors

The Spatial and Temporal Distributions of Absorbing Aerosols over East Asia

Contact Info

Product

Resources

About