Knowledge Resource Center for Ecological Environment in Arid Area
| DOI | 10.3390/rs11212466 |
| Orange Snow-A Saharan Dust Intrusion over Romania During Winter Conditions | |
| Marmureanu, Luminita1; Marin, Cristina Antonia1,2; Andrei, Simona1; Antonescu, Bogdan1; Ene, Dragos1; Boldeanu, Mihai1,3; Vasilescu, Jeni1; Vitelaru, Catalin4; Cadar, Oana5; Levei, Erika5 | |
| 通讯作者 | Marin, Cristina Antonia |
| 来源期刊 | REMOTE SENSING
 |
| EISSN | 2072-4292 |
| 出版年 | 2019 |
| 卷号 | 11期号:21 |
| 英文摘要 | On the morning of 23 March 2018, an unusual phenomenon was observed over Romania where the southeastern part of the country was covered in a fresh-layer of orange snow. The event was extensively reported in mass-media and social-media and raised questions about the origin and the possible impact of the orange snow. Even if this type of events, intrusions of Saharan dust, have been reported before in Romania, and in Europe in general, their occurrence during negative temperature conditions is very rare. Saharan dust intrusion occurs over Europe mainly during spring and, in general, is not accompanied by snow at low altitudes. In this article, for the first time, the synoptic-scale conditions leading to the Saharan dust intrusion over Romania and the chemical and physical properties of the deposited dust particles in a snow layer were analyzed. The Saharan dust event affected a permanent atmospheric measurement research infrastructure located southwest of Bucharest, the capital city of Romania. In-situ and remote sensing measurements conducted at this research infrastructure allowed the identification of the dust source as the north Sahara. The source was confirmed by the elemental ratios of the main components (e.g., Al, Ca, Mg, Fe, K). For example, the (Ca+Mg)/Fe ratio of 1.39 was characteristic for the north Sahara. The dust morphology and the minerals were analyzed by scanning electron microscopy with energy disperse X-ray spectrometry (SEM/EDX). The size distribution of the particle geometric diameter showed that they are centred on 1 mu m, but larger particles up to 40 mu m are also present. To visualize the minerals, an approach was developed which emphasized the presence of the calcite, quartz or clay minerals. The optical parameters of dust were measured by re-suspending the particles. Values of the optical parameters (i.e., asymmetry parameter at 550 nm was 0.604, single scattering albedo was 0.84-0.89) were similar to those measured for Saharan dust intrusions over the Iberian Peninsula. Also, the non-refractory particles found in the dust-contaminated snow layer were analyzed, indicating the presence of HULIS-like compounds, most probably advected from the Mediterranean sea. |
| 英文关键词 | Saharan dust snow deposition chemical composition physical properties |
| 类型 | Article |
| 语种 | 英语 |
| 国家 | Romania |
| 开放获取类型 | gold |
| 收录类别 | SCI-E |
| WOS记录号 | WOS:000504716700007 |
| WOS关键词 | MICROWAVE RADIOMETER ; MEDITERRANEAN REGION ; CHEMICAL-COMPOSITION ; RADIATIVE PROPERTIES ; OPTICAL-PROPERTIES ; AFRICAN DUST ; DESERT DUST ; AEROSOL ; CLIMATOLOGY ; EVENTS |
| 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 |
| EI主题词 | 2019-11-01 |
| 资源类型 | 期刊论文 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/310574 |
| 作者单位 | 1.Natl Inst Res & Dev Optoelect INOE, Remote Sensing Dept, 2000,Str Atomistilor 409,Magurele,RO077, Ilfov, Romania; 2.Univ Politehn Bucuresti, Dept Phys, Independentei 313,RO060042, Bucharest, Romania; 3.Univ Politehn Bucuresti, Fac Elect Telecommun & Informat Technol, Bd Iuliu Maniu 1-3,RO061071, Bucharest, Romania; 4.Natl Inst Res & Dev Optoelect, Dept Adv Surface Proc & Anal Vacuum Technol, Str Atomistilor 409,Magurele,RO077125, Ilfov, Romania; 5.INCDO INOE 2000 Res Inst Analytical Instrumentati, Str Donath 67,RO400293, Cluj Napoca, Romania |
| 推荐引用方式 GB/T 7714 | Marmureanu, Luminita,Marin, Cristina Antonia,Andrei, Simona,et al. Orange Snow-A Saharan Dust Intrusion over Romania During Winter Conditions[J],2019,11(21). |
| APA | Marmureanu, Luminita.,Marin, Cristina Antonia.,Andrei, Simona.,Antonescu, Bogdan.,Ene, Dragos.,...&Levei, Erika.(2019).Orange Snow-A Saharan Dust Intrusion over Romania During Winter Conditions.REMOTE SENSING,11(21). |
| MLA | Marmureanu, Luminita,et al."Orange Snow-A Saharan Dust Intrusion over Romania During Winter Conditions".REMOTE SENSING 11.21(2019). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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