干旱区生态环境知识资源中心(Arid): A Climatological Assessment of Intense Desert Dust Episodes over the Broader Mediterranean Basin Based on Satellite Data

Arid

DOI	10.3390/rs13152895
	A Climatological Assessment of Intense Desert Dust Episodes over the Broader Mediterranean Basin Based on Satellite Data
	Gavrouzou, Maria; Hatzianastassiou, Nikolaos; Gkikas, Antonis; Lolis, Christos J.; Mihalopoulos, Nikolaos
通讯作者	Hatzianastassiou, N (corresponding author), Univ Ioannina, Dept Phys, Lab Meteorol, GR-45110 Ioannina, Greece.
来源期刊	REMOTE SENSING
EISSN	2072-4292
出版年	2021
卷号	13 期号:15
英文摘要	A satellite algorithm able to identify Dust Aerosols (DA) is applied for a climatological investigation of Dust Aerosol Episodes (DAEs) over the greater Mediterranean Basin (MB), one of the most climatologically sensitive regions of the globe. The algorithm first distinguishes DA among other aerosol types (such as Sea Salt and Biomass Burning) by applying threshold values on key aerosol optical properties describing their loading, size and absorptivity, namely Aerosol Optical Depth (AOD), Aerosol Index (AI) and angstrom ngstrom Exponent (alpha). The algorithm operates on a daily and 1 degrees x 1 degrees geographical cell basis over the 15-year period 2005-2019. Daily gridded spectral AOD data are taken from Moderate Resolution Imaging Spectroradiometer (MODIS) Aqua Collection 6.1, and are used to calculate the alpha data, which are then introduced into the algorithm, while AI data are obtained by the Ozone Monitoring Instrument (OMI) -Aura- Near-UV aerosol product OMAERUV dataset. The algorithm determines the occurrence of Dust Aerosol Episode Days (DAEDs), whenever high loads of DA (higher than their climatological mean value plus two/four standard deviations for strong/extreme DAEDs) exist over extended areas (more than 30 pixels or 300,000 km(2)). The identified DAEDs are finally grouped into Dust Aerosol Episode Cases (DAECs), consisting of at least one DAED. According to the algorithm results, 166 (116 strong and 50 extreme) DAEDs occurred over the MB during the study period. DAEDs are observed mostly in spring (47%) and summer (38%), with strong DAEDs occurring primarily in spring and summer and extreme ones in spring. Decreasing, but not statistically significant, trends of the frequency, spatial extent and intensity of DAECs are revealed. Moreover, a total number of 98 DAECs was found, primarily in spring (46 DAECs) and secondarily in summer (36 DAECs). The seasonal distribution of the frequency of DAECs varies geographically, being highest in early spring over the eastern Mediterranean, in late spring over the central Mediterranean and in summer over the western MB.
英文关键词	aerosol dust episodes Mediterranean Basin satellite detection frequency of occurrence spatial coverage trends transport
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000682149600001
WOS关键词	AEROSOL OPTICAL DEPTH ; MINERAL DUST ; GLOBAL PRECIPITATION ; PM10 CONCENTRATIONS ; SOURCE ACTIVATION ; TRANSPORT ; MODIS ; VARIABILITY ; IDENTIFICATION ; IMPROVEMENTS
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/364472
作者单位	[Gavrouzou, Maria; Hatzianastassiou, Nikolaos; Lolis, Christos J.] Univ Ioannina, Dept Phys, Lab Meteorol, GR-45110 Ioannina, Greece; [Gkikas, Antonis] Natl Observ Athens, Inst Astron Astrophys Space Applicat & Remote Sen, Athens 15236, Greece; [Mihalopoulos, Nikolaos] NOA, Inst Environm Res & Sustainable Dev IERSD, Athens 15236, Greece; [Mihalopoulos, Nikolaos] Univ Crete, Dept Chem, Environm Chem Proc Lab, Iraklion 70013, Greece
推荐引用方式 GB/T 7714	Gavrouzou, Maria,Hatzianastassiou, Nikolaos,Gkikas, Antonis,et al. A Climatological Assessment of Intense Desert Dust Episodes over the Broader Mediterranean Basin Based on Satellite Data[J],2021,13(15).
APA	Gavrouzou, Maria,Hatzianastassiou, Nikolaos,Gkikas, Antonis,Lolis, Christos J.,&Mihalopoulos, Nikolaos.(2021).A Climatological Assessment of Intense Desert Dust Episodes over the Broader Mediterranean Basin Based on Satellite Data.REMOTE SENSING,13(15).
MLA	Gavrouzou, Maria,et al."A Climatological Assessment of Intense Desert Dust Episodes over the Broader Mediterranean Basin Based on Satellite Data".REMOTE SENSING 13.15(2021).