Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/978-3-319-24478-5_92 |
Saharan Dust as a Causal Factor of Significant Cloud Cover Along the Saharan Air Layer in the Atlantic Ocean | |
Kishcha, Pavel1; da Silva, Arlindo M.2; Starobinets, Boris1; Alpert, Pinhas1 | |
通讯作者 | Kishcha, Pavel |
会议名称 | 34th International Technical Meeting on Air Pollution Modelling and its Application (ITM) |
会议日期 | MAY 04-08, 2015 |
会议地点 | Montpellier, FRANCE |
英文摘要 | The tropical Atlantic is frequently affected by Saharan dust intrusions. Based on MODIS cloud fraction (CF) data during the 10 year study period, we found that these dust intrusions contribute to significant cloud cover along the Saharan Air Layer (SAL). Below the temperature inversion at the SAL's base, the presence of large amounts of settling dust particles, together with marine aerosols, produces meteorological conditions suitable for the formation of shallow stratocumulus clouds. The significant cloud fraction along the SAL together with clouds over the Atlantic Inter-tropical Convergence Zone contributes to the 20 % hemispheric CF asymmetry between the tropical North and South Atlantic. This leads to the imbalance in strong solar radiation, which reaches the sea surface between the tropical North and South Atlantic, and, consequently, affects climate formation in the tropical Atlantic. Therefore, despite the fact that, over the global ocean, there is no noticeable hemispheric asymmetry in cloud fraction, over the significant area such as the tropical Atlantic the hemispheric asymmetry in CF takes place. Saharan dust is also the major contributor to hemispheric aerosol asymmetry over the tropical Atlantic. The NASA GEOS-5 model with aerosol data assimilation was used to extend the MERRA reanalysis with five atmospheric aerosol species (desert dust, sulfates, organic carbon, black carbon, and sea-salt). The obtained 10 year (2002-2012) MERRA-driven aerosol reanalysis dataset (aka MERRAero) showed that, over the tropical Atlantic, dust and carbonaceous aerosols were distributed asymmetrically relative to the equator, while other aerosol species were distributed more symmetrically. |
来源出版物 | AIR POLLUTION MODELING AND ITS APPLICATION XXIV |
出版年 | 2016 |
页码 | 569-573 |
ISBN | 978-3-319-24476-1 |
EISBN | 978-3-319-24478-5 |
出版者 | SPRINGER INT PUBLISHING AG |
类型 | Proceedings Paper |
语种 | 英语 |
国家 | Israel;USA |
收录类别 | CPCI-S |
WOS记录号 | WOS:000393786100093 |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
资源类型 | 会议论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/305099 |
作者单位 | 1.Tel Aviv Univ, Dept Geosci, Tel Aviv, Israel; 2.NASA, GSFC, Global Modeling & Assimilat Off, Greenbelt, MD USA |
推荐引用方式 GB/T 7714 | Kishcha, Pavel,da Silva, Arlindo M.,Starobinets, Boris,et al. Saharan Dust as a Causal Factor of Significant Cloud Cover Along the Saharan Air Layer in the Atlantic Ocean[C]:SPRINGER INT PUBLISHING AG,2016:569-573. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。