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Effects of dust-in-snow forcing over the Tibetan Plateau on the East Asian dust cycle during the Last Glacial Maximum
Shen, Jiaojiao1,2,3; Xie, Xiaoning1,4; Cheng, Xugeng5; Liu, Xiaodong1,2
Corresponding AuthorXie, Xiaoning(xnxie@ieecas.cn)
2020-03-15
Source PublicationPALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN0031-0182
Volume542Pages:13
AbstractThe improved Community Atmosphere Model version 4 with a Bulk Aerosol Model parameterizations of the dust size distribution (CAM4-BAM) was used to investigate the dust-in-snow radiative forcing (SRF) over the Tibetan Plateau (TP) and its feedbacks on the regional climate and the dust cycle in spring, the season with the strongest dust activity, over East Asia during the Last Glacial Maximum (LGM). Simulated results show that the dust in snow can cause a large positive SRF and significant warming at the TP surface, reaching more than 45 W m(-2) and 3-5 degrees C warming in western TP during the LGM. The SRF increases the East Asian dust emissions, dry deposition and wet deposition by 71.6 Tg (8.1%), 34.5 Tg (7.0%) and 7.9 Tg (16.0%), respectively, in spring during LGM. Further analysis reveals that, the SRF warms the TP surface and enhances the thermal effect of the TP in spring by increasing the surface shortwave radiative forcing, sensible and latent heat fluxes. A mid-upper level anticyclonic circulation anomaly is generated, thus increases the regional westerly wind over the East Asian dust source region, and in turn enhances the dust emission and dust transport over East Asia. In general, SRF over the TP creates a positive feedback loop of enhancing the East Asian dust cycle during LGM.
KeywordDust flux Sensible heat Anticyclone Positive feedback Westerlies Climatic warming
DOI10.1016/j.palaeo.2019.109442
WOS KeywordTRANS-PACIFIC TRANSPORT ; MINERAL DUST ; RADIATIVE FEEDBACKS ; CLIMATE ; AEROSOLS ; SIMULATION ; COVER ; SIZE ; AGE
Indexed BySCI ; SCI
Language英语
Funding ProjectStrategic Priority Research Program of Chinese Academy of Sciences[XDA20070103] ; National Key Research and Development Program of China[2016YFA0601904] ; National Natural Science Foundation of China[41991254] ; National Natural Science Foundation of China[41690115] ; CAS Light of West China Program
WOS Research AreaPhysical Geography ; Geology ; Paleontology
Funding OrganizationStrategic Priority Research Program of Chinese Academy of Sciences ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; CAS Light of West China Program
WOS SubjectGeography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS IDWOS:000517852600011
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/12765
Collection古环境研究室
第四纪科学与全球变化卓越创新中心
Corresponding AuthorXie, Xiaoning
Affiliation1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Shaanxi Prov Meteorol Bur, Xian 710014, Peoples R China
4.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China
5.Nanjing Univ Sci Informat & Technol, China Meteorol Adm, Key Lab Aerosol Cloud Precipitat, Nanjing 210044, Peoples R China
Recommended Citation
GB/T 7714
Shen, Jiaojiao,Xie, Xiaoning,Cheng, Xugeng,et al. Effects of dust-in-snow forcing over the Tibetan Plateau on the East Asian dust cycle during the Last Glacial Maximum[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2020,542:13.
APA Shen, Jiaojiao,Xie, Xiaoning,Cheng, Xugeng,&Liu, Xiaodong.(2020).Effects of dust-in-snow forcing over the Tibetan Plateau on the East Asian dust cycle during the Last Glacial Maximum.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,542,13.
MLA Shen, Jiaojiao,et al."Effects of dust-in-snow forcing over the Tibetan Plateau on the East Asian dust cycle during the Last Glacial Maximum".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 542(2020):13.
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