کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4441623 | 1311115 | 2008 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Rainfall scavenging coefficients for atmospheric nitric acid and nitrate in a subtropical coastal environment
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علم هواشناسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Rainfall scavenging coefficients for atmospheric nitric acid and nitrate in a subtropical coastal environment Rainfall scavenging coefficients for atmospheric nitric acid and nitrate in a subtropical coastal environment](/preview/png/4441623.png)
چکیده انگلیسی
Hourly-measured gas concentrations and 24-h integrated PM10 concentrations were used in conjunction with a below-cloud scavenging model to explain nitrate (NO3â) concentrations in rainwater samples collected at a bayside monitoring site in Tampa, Florida, USA. Mass particle concentrations were assumed to have a log-normal distribution as a function of particle diameter based on experimental data from the monitoring site. The effect of rain droplet diameter on modeled scavenging rates was studied using exponential, gamma, and log-normal droplet size distributions (DSD). For 11 summertime rain events and across these three DSDs, normalized mean scavenging coefficients (average ± standard deviation) for HNO3 and NO3â were 2.90 à 10â5 ± 1.80 à 10â5 (s à mm/h)â1 and 2.78 Ã 10â5 ± 0.56 Ã 10â5 (s mm/h)â1. Rainwater concentrations were modeled for two different cases: the first case assumed constant gas and particle concentrations and the second case assumed first-order removal of gases and particles. The below-cloud scavenging model explained 92.0 ± 40.2% of NO3â concentrations in the first case and 40.0 ± 24.6% in the second case. The model predicted that aerosol NO3â constituted the largest fractions of rainwater NO3â.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Atmospheric Environment - Volume 42, Issue 33, October 2008, Pages 7757-7767
Journal: Atmospheric Environment - Volume 42, Issue 33, October 2008, Pages 7757-7767
نویسندگان
Silvia M. Calderón, Noreen D. Poor, Scott W. Campbell, Paul Tate, Ben Hartsell,