电子邮件：bjh@mail.iap.ac.cn

研究方向：大气环境探测与分析

简历

1989.9-1992.6 攻读中国科学院大气物理研究所大气物理与大气环境专业硕士学位

1992.7 – 中国科学院大气物理研究所工作

1996.9-1999.9 攻读中国科学院大气物理研究所大气物理与大气环境专业博士学位

1995.6-1995.11 麻省理工学院 ( MIT )做访问学者

2000.1-2000.6 美国国家大气研究中心(NCAR)做访问学者

主要工作
主要从事大气物理和大气化学方面的研究工作，包括：

1.紫外辐射（UV）、光合有效辐射(PAR)： 我国不同地区UV、PAR的变化特征、长期变化趋势、计算方法

2.地面臭氧和其前体物氮氧化物(NOx)、辐射等的综合测量和相互关系以及臭氧光化学过程；

3.植物挥发性有机物的排放（VOC）：森林与草地VOC排放通量的测定和模式研究；

4.黑碳气溶胶；

5.中国科学院大气本底观测网兴隆站的建设、维护、运行

代表成果

1.     白建辉,2010.华北地区紫外与可见光辐射在大气中的传输.环境科学学报.30(5):915-925. (CSCD)

2.      Bai, J. H., G. de Leeuw, R. van der A, I. De Smedt, N. Theys, M. Van Roozendael, and L. Sogacheva, W. H. Chai. 2018: Variations and photochemical transformations of atmospheric constituents in North China. Atmos. Environ., 189, 213-226.

3.     白建辉, 2017: 亚热带竹林地区的臭氧及其影响因子. 地球科学前沿, 7(4), 536-551. doi: 10.12677/ag.2017.74055.

4.     Bai J.H., T. Duhl, N. Hao. 2015. Biogenic volatile compound emissions from a temperate forest, China: model simulation. Journal of Atmospheric Chemistry. DOI 10.1007/s10874-015-9315-3.

5.      Bai, J., Guenther, A., Turnipseed, A., Duhl, T., Yu S., Wang B., 2016. Seasonal variations in whole-ecosystem BVOC emissions from a

代表项目

Estimation of the isoprene emission from theInner Mongoliagrassland

白建辉

基本信息:

资助机构：National Nature Science Foundation of China, ESA–MOST China Dragon Cooperation, Dragon 3 project, 7 framework programme MarcoPolo

摘要:

Measurements of isoprene emissions, solar spectral radiation, temperature and relative humidity were carried out at a grassland site in the Inner Mongolia,Chinaduring the growing seasons in 2002 and 2003. Isoprene emissions are dependent on PAR (Photosynthetically Active Radiation) and temperature nonlinearly. PAR controls the main processes related to isoprene emission, thus, PAR energy balance is used to establish quantitative relationship between isoprene emission and its affecting factors. An empirical Equation of isoprene emission was built on the basis of PAR energy balance. The calculated values were in good agreement with those measured for 2002 and 2003 summer seasons, the relative biases of 70% estimated emissions were within 50% compared to measured fluxes. The chamber changes the inside environment and emission fluxes, the emission differences were estimated by using the empirical Equation. The results show that isoprene emission flux around the noon decreases by 37% when the chamber is used, i.e., the biggest effect was resulted from PAR difference caused by the chamber. Isoprene emission measured by chamber should be corrected. The empirical model of isoprene emission showed that isoprene emission fluxes were close to zero, when PAR was low in early morning and in late evening. Total isoprene emissions emitted from the grassland in theInner Mongoliawere 1.10 and 1.00 gC m–2 during the growing seasons of 2002 and 2003, respectively, which contributed to about 3.1–4.3% and 2.8–3.9% to grass respiration. The averaged isoprene emission normalized to a standard light (1 500 μmol m–2 s–1) and temperature (30 °C) condition was 482.8 μg m–2 h–1.

关键词:

Grassland; isoprene; PAR energy balance; air temperature; water vapor pressure