Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018JD029744 |
Driving Factors of Aerosol Properties Over the Foothills of Central Himalayas Based on 8.5Years Continuous Measurements | |
Hooda, R. K.1; 39;Connor, E. J.2 | |
2018-12-16 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2018 |
卷号 | 123期号:23页码:13421-13442 |
文章类型 | Article |
语种 | 英语 |
国家 | Finland; India; England; Switzerland; Norway |
英文摘要 | This study presents analysis of in situ measurements conducted over the period 2005-2014 in the Indian Himalayas to give a thorough overview of the factors and causes that drive aerosol properties. Aerosol extensive properties (namely, particle number concentration, scattering coefficient, equivalent black carbon, PM2.5, and PM10) have 1.5-2 times higher values in the early to late afternoon than during the night, and a strong seasonality. The interannual variability is 20% for both PM2.5 and total particle number concentration. Analysis of the data shows statistically significant decreasing trends of -2.3gm(-3)year(-1) and -2.7gm(-3)year(-1) for PM2.5 and PM10, respectively, over the study period. The mountainous terrain site (Mukteshwar, MUK) is primarily under the influence of air from the plains. This is due to convective transport processes that are enhanced by local and mesoscale topography, leading to pronounced valley/mountain winds and consequently to atmospheric boundary layer air lifting from the plains below. The transport from plains is evident in seasonal-diurnal patterns observed at MUK. The timing of the patterns corresponds with changes in turbulence and water vapor (q). According to our analysis, using these as proxies is a viable method for examining boundary layer influence in the absence of direct atmospheric boundary layer height measurements. Comparing the measurements with climate models shows that even regional climate models have problems capturing the orographic influence accurately at MUK, highlighting the importance of long-term direct measurements at multiple points to understand aerosol behavior in mountainous areas. |
英文关键词 | in situ surface aerosol observations turbulence and water vapor central Himalayas in India atmospheric boundary layer climate models |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000455285500022 |
WOS关键词 | TERRAIN-FOLLOWING COORDINATE ; BOUNDARY-LAYER DYNAMICS ; INDIAN-OCEAN EXPERIMENT ; SIZE DISTRIBUTION DATA ; 2 MEASUREMENT STATIONS ; LONG-RANGE TRANSPORT ; SUMMER MONSOON ; ATMOSPHERIC AEROSOLS ; PART 1 ; SEASONAL CHARACTERISTICS |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/32956 |
专题 | 气候变化 |
作者单位 | 1.Finnish Meteorol Inst, Helsinki, Finland; 2.Energy & Resources Inst, New Delhi, India; 3.Univ Reading, Reading, Berks, England; 4.Fed Off Meteorol & Climatol, Payerne, Switzerland; 5.Finnish Meteorol Inst, Kuopio, Finland; 6.SIOS KC, Longyearbyen, Norway |
推荐引用方式 GB/T 7714 | Hooda, R. K.,39;Connor, E. J.. Driving Factors of Aerosol Properties Over the Foothills of Central Himalayas Based on 8.5Years Continuous Measurements[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2018,123(23):13421-13442. |
APA | Hooda, R. K.,&39;Connor, E. J..(2018).Driving Factors of Aerosol Properties Over the Foothills of Central Himalayas Based on 8.5Years Continuous Measurements.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(23),13421-13442. |
MLA | Hooda, R. K.,et al."Driving Factors of Aerosol Properties Over the Foothills of Central Himalayas Based on 8.5Years Continuous Measurements".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.23(2018):13421-13442. |
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