Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.4209/aaqr.2015.05.0320 |
Impact of Long-Range Transported African Dust on Cloud Water Chemistry at a Tropical Montane Cloud Forest in Northeastern Puerto Rico | |
Valle-Diaz, Carlos J.1,2; Torres-Delgado, Elvis1; Colon-Santos, Stephanie M.2; Lee, Taehyoung3; Collett, Jeffrey L., Jr.4; McDowell, William H.5; Mayol-Bracero, Olga L.1 | |
通讯作者 | Mayol-Bracero, Olga L. |
会议名称 | 2nd Atmospheric Chemistry and Physics at Mountain Sites Symposium |
会议日期 | AUG 11-15, 2014 |
会议地点 | Steamboat Springs, CO |
英文摘要 | Bulk and drop size fractionated cloud water was collected at a Caribbean tropical montane cloud forest (TMCF) in northeastern Puerto Rico in the summer months of 2010-2012 and winter months of 2011 as part of the Puerto Rico African Dust and Cloud Study (PRADACS). We studied how cloud water chemistry in a Caribbean TMCF was affected by long-range transported African dust (LRTAD). Using HYSPLIT trajectories and enrichment factor analysis, the air masses influencing clouds at Pico del Este were identified as dust, marine, and dust with anthropogenic influence. Samples were analyzed for pH, conductivity, water-soluble ions, and metals. Na+ and Cl-comprised the main water-soluble ions (6080%) suggesting a strong marine influence. A 0.1-10% contribution of anthropogenic (nss-SO42-) and 0.2-13% contribution of mineral dust (nss-Ca2+) sources to the cloud chemical composition was observed. Primary aerosols (i.e., mineral dust and sea-salt) were enriched in large cloud water droplets (LCWD) and secondary aerosols (i.e., anthropogenic particles) were enriched in small cloud water droplets (SCWD). As a result, pH was found to be higher in LCWD due to the neutralizing capacity of nss-Ca2+ and lower in SCWD due to the presence of acidifying species (nss-SO42-, NO3-, and organic acids). Fe and Al, indicators for mineral dust were similarly distributed across the cloud droplet size spectrum. Our results show that LRTAD events modulate bulk and size-fractionated cloud water chemistry, potentially influencing cloud microphysical properties and processes. |
英文关键词 | Sahara desert Desert dust Rainforest Cloud processing |
来源出版物 | AEROSOL AND AIR QUALITY RESEARCH |
ISSN | 1680-8584 |
EISSN | 2071-1409 |
出版年 | 2016 |
卷号 | 16 |
期号 | 3 |
页码 | 653-664 |
出版者 | TAIWAN ASSOC AEROSOL RES-TAAR |
类型 | Article;Proceedings Paper |
语种 | 英语 |
国家 | USA;South Korea |
收录类别 | SCI-E ; CPCI-S |
WOS记录号 | WOS:000371498900016 |
WOS关键词 | CLIMATE-CHANGE ; MINERAL DUST ; CHEMICAL-COMPOSITION ; PRECIPITATION ; AEROSOLS ; RAIN |
WOS类目 | Environmental Sciences |
WOS研究方向 | Environmental Sciences & Ecology |
资源类型 | 会议论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/305052 |
作者单位 | 1.Univ Puerto Rico, Dept Environm Sci, San Juan, PR 00936 USA; 2.Univ Puerto Rico, Dept Chem, San Juan, PR 00936 USA; 3.Hankuk Univ Foreign Studies, Dept Environm Sci, Seoul, South Korea; 4.Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80523 USA; 5.Univ New Hampshire, Dept Nat Resources & Environm, Durham, NH 03824 USA |
推荐引用方式 GB/T 7714 | Valle-Diaz, Carlos J.,Torres-Delgado, Elvis,Colon-Santos, Stephanie M.,et al. Impact of Long-Range Transported African Dust on Cloud Water Chemistry at a Tropical Montane Cloud Forest in Northeastern Puerto Rico[C]:TAIWAN ASSOC AEROSOL RES-TAAR,2016:653-664. |
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。