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学术报告
【2016-09-07】Understanding Black Carbon (BC) Atmospheric Aging: Radiative Properties and Timescale
发布时间:2016-08-31

报告题目:Understanding Black Carbon (BC) Atmospheric Aging: Radiative Properties and Timescale


报告人:贺涔霖博士(美国加州大学洛杉机分校)


报告时间:2016年9月7日下午15:00


报告地点:LAPC多功能厅




Abstract

Black carbon (BC), commonly known as soot, has been identified as the second most important anthropogenic global warming agent in the current atmosphere by virtue of its strong absorption of solar radiation and its role as cloud condensation nuclei in cloud formation. BC climatic effects are significantly influenced by BC aging process in the atmosphere, which transforms BC from an external to internal mixing state and increases its hygroscopicity and light absorption. This presentation seeks to understand variations of BC radiative properties and aging timescales during atmospheric aging from a modeling perspective. In the first part, we develop and examine a microphysics-based BC aging scheme that accounts for condensation, coagulation, and heterogeneous chemical oxidation processes in a global 3-D chemical transport model (GEOS-Chem) by interpreting the BC measurements from the HIAPER Pole-to-Pole Observations (HIPPO, 2009–2011) using the model. The microphysics-based aging scheme significantly improves model simulations of BC across the Pacific and shows important implications for global BC budget. In the second part, we develop a theoretical BC aging model to account for three typical evolution stages, namely, freshly emitted aggregates, BC coated by soluble material, and BC particles undergoing further hygroscopic growth. We employ the geometric-optics surface-wave (GOS) approach to compute BC single-scattering properties at each aging stage, which are subsequently compared with laboratory measurements. The optical cross sections of coated BC particles vary by more than a factor of 2 due to different coating structures, which suggests that an accurate estimate of BC radiative effects requires the incorporation of a dynamic BC aging process that accounts for realistic coating structures in climate models.





Cenlin He (贺涔霖)

PhD candidate (Advisers: Kuo-Nan Liou, Qinbin Li)

Dept. of Atmospheric & Oceanic Sciences

Univ. of California Los Angeles (UCLA)

Los Angeles, CA 90095

cenlin.he@gmail.com

linkedin.com/in/cenlinhe

cenlinhe.wix.com/personal

Tel: (310)-819-5801

EDUCATION EXPERIENCE

2014.1 - 2017.6 (expected):  PhD candidate in Atmospheric Sciences (GPA: 4.0/4.0, UCLA, USA)

2012.9 - 2013.12:         M.S. in Atmospheric Sciences (GPA: 4.0/4.0, UCLA, USA)

2009.9 - 2012.7:          B.S. in Applied Mathematics (GPA: 3.74/4.0, Peking University, China)

2008.9 - 2012.7:          B.S. in Environmental Sciences (GPA: 3.8/4.0, Peking University, China)


RESEARCH INTEREST

Atmospheric chemistry and modeling, climate change, air pollution, aerosol chemistry and physics, aerosol-snow interaction, aerosol-cloud-radiation interaction


ACADEMIC PUBLICATIONS

16. Junfeng Liu, Wei Tao, Zhuo Chen, George A. Ban-Weiss, Larry W Horowitz, Annmarie Carlton, Songmiao Fan, Yanli Cheng, Tzung-May Fu,Cenlin He, Shu Tao (2016), A Comparison of Parameterizations for Secondary Organic Aerosol Production: Global Budget and Spatiotemporal Variability, Atmos. Environ., in review.

15. Y.-Y. Yan, J.-T. Lin, andC. He(2016), Timing contrast in the effects of climate variability and anthropogenic emissions on US ozone change,Environ. Sci. Tech., in revision.

14. Qi, L., Li, Q., Li, Y., andHe, C. (2016): Factors Controlling Black Carbon Distribution in the Arctic, Atmos. Chem. Phys. Discuss., doi:10.5194/acp-2016-707, in review.

13. L. Qi, Q. B. Li,C. He, X. Wang, and J. Huang (2016), Effect of Wegener-Bergeron-Findeisen (WBF) process to black carbon simulation, Atmos. Chem. Phys. Discuss., in review.

12.C. He, Y. Takano, K. N. Liou, P. Yang, Q. B. Li, and D. W. Mackowski (2016), Intercomparison of the GOS approach, superposition T-matrix method, and laboratory measurements for black carbon optical properties during aging,J. Quant. Spectrosc. Radiat. Transf., 184, 287–296,doi:10.1016/j.jqsrt.2016.08.004.

11. W. L. Lee, K. N. Liou,C. He, S.-C. Liang, Z. Liu, Q. Yue (2016), Impact of absorbing aerosol deposition on snow albedo reduction over the southern Tibetan Plateau Based on Satellite Observations,Theor. Appl. Climatol., 1-10, 10.1007/s00704-016-1860-4.

10. B. Zhao, K.-N. Liou, Y. Gu,C. He, W.-L. Lee, X. Chang, Q. Li, S. Wang, H.-L. Tseng, L.-Y. R. Leung, and J. Hao (2016): Impact of buildings on surface solar radiation over urban Beijing,Atmos. Chem. Phys., 16, 5841-5852, doi:10.5194/acp-16-5841-2016.

9.He, C., Li, Q., Liou, K.-N., Qi, L., Tao, S., and Schwarz, J. P. (2016): Microphysics-based black carbon aging in a global CTM: constraints from HIPPO observations and implications for global black carbon budget,Atmos. Chem. Phys., 16, 3077-3098, doi:10.5194/acp-16-3077-2016.

8.He, C., Liou, K.-N., Takano, Y., Zhang, R., Zamora, M. L., Yang, P., Li, Q., and Leung, L. R. (2015): Variation of the radiative properties during black carbon aging: theoretical and experimental intercomparison,Atmos. Chem. Phys., 15, 11967-11980, doi:10.5194/acp-15-11967-2015.

7. Mao, Y. H., Q. B. Li, D. K. Henze, Z. Jiang, D. B. A. Jones, M. Kopacz,C.He,L. Qi, M. Gao, W.-M. Hao, and K.-N. Liou (2015): Estimates of black carbon emissions in the western United States using the GEOS-Chem adjoint model,Atmos. Chem. Phys., 15, 7685-7702, doi:10.5194/acp-15-7685-2015.

6.He, C.,Q. Li, K.-N. Liou, Y. Takano, Y. Gu, L. Qi, Y. Mao, and L. R. Leung (2014), Black carbon radiative forcing over the Tibetan Plateau,Geophys. Res. Lett., 41, 7806 – 7813, doi:10.1002/2014GL062191.

5.He, C., Q. B. Li, K. N. Liou, J. Zhang, L. Qi, Y. Mao, M. Gao, Z. Lu, D. G. Streets, Q. Zhang, M. M. Sarin, and K. Ram (2014), A global 3-D CTM evaluation of black carbon in the Tibetan Plateau,Atmos. Chem. Phys.,14, 7091-7112, doi:10.5194/acp-14-7091-2014.

4. Liou, K. N., Y. Takano,C. He, P. Yang, L. R. Leung, Y. Gu, and W. L. Lee (2014), Stochastic parameterization for light absorption by internally mixed BC/dust in snow grains for application to climate models,J. Geophys. Res.-Atmos.,119, doi:10.1002/2014JD021665.

3.He, C., Liu, J., Carlton, A. G., Fan, S., Horowitz, L. W., Levy II, H., and Tao, S. (2013), Evaluation of factors controlling global secondary organic aerosol production from cloud processes,Atmos. Chem. Phys.,13, 1913-1926, doi:10.5194/acp-13-1913-2013.

2.He, C.and T.-M. Fu (2013), Air-Sea Exchange of Volatile Organic Compounds: A New Model with Microlayer Effects,Atmos. Oceanic Sci. Lett.,6, 97−102, doi: 10.1080/16742834.2013.11447063.

1.He, C., F. Gao, X. Lu, Z. Hou, and S. Zhang (2012), Eco-toxicological Effects of Multi-Wall Carbon Nanotube on Soil Microorganisms,Asian Journal of Ecotoxicology,7, 148-155, (in Chinese with English abstract).

CONFERENCE PRESENTATIONS

9. He, C. et al. (Poster): Investigating black carbon-snow (“dirty snow”) albedo feedback in climate studies,IGAC Science Conference, Breckenridge, Colorado, USA, Sept. 2016.

8. He, C. et al. (Poster): Variation of radiative properties during BC aging: theoretical and experimental intercomparison,AMS international meeting, New Orleans, Lousiana, USA, Jan. 2016. (Student Award)

7. He, C. et al. (Poster): Microphysics-based black carbon aging in a global 3-D CTM: constraints from HIPPO observations and implications for global black carbon budget,AGU international meeting, San Francisco, CA, USA, Dec. 2015.

6. He, C. et al. (Oral): Variation of radiative properties during BC aging: theoretical and experimental intercomparison,International Aerosol Modeling & Algorithm, Davis, CA, USA, Dec. 2015.

5. He, C. et al. (Oral): Improving BC aging scheme in GEOS-Chem based on aerosol microphysics: Constraints from HIPPO observations,International GEOS-Chem meeting, Boston, MA, USA, May 2015.

4. He, C. et al. (Poster):Variation of radiative properties during BC aging: theoretical and experimental intercomparison,AGU international meeting, San Francisco, CA, USA, Dec. 2014.

3. He, C. et al. (Poster): Evolution of BC optical properties during atmospheric aging: comparison between theoretical calculations and laboratory experiments,International Conference on Clouds and Aerosols, Nanjing, China, June 2014.

2. He, C. et al. (Poster):Comprehensive Evaluation of Black Carbon Simulations over the Tibetan Plateau and Implications for Radiative Forcing,AGU international meeting, San Francisco, CA, USA, Dec. 2013.

1. He, C. et al. (Oral): Evaluation of factors controlling global secondary organic aerosol production from cloud processes,AGU international meeting, San Francisco, CA, USA, Dec. 2012.


SELECTED HONORS & AWARDS

Jun. 2016              UCLA Dissertation Year Fellowship

Feb. 2016       First Place Student Poster Award in 2016 AMS Mario Symposium

May 2015       2015 CESASC Annual Scholarship Awards

Mar. 2015      2015 Phi Tau Phi West America Chapter Annual Scholarship Awards

Oct. 2014              Best Presentation in COAA-SCC Annual Workshop, San Diego, CA.

2012-2013      Edwin W. Pauley Fellowship

2012-2013      UCLA University Fellowship

Jun. 2012             Outstanding Graduates of Peking Univ.

Jan. 2012             China National Scholarship

Jun. 2011              Third Prize in China Youth Innovation Competition of Environmental Protection

Jun. 2011              Third Prize in Mathematical Modeling and Computer Application Competition, Peking Univ.

Oct .2010              Wusi Fellowship (top 4% students), Peking University

Dec. 2009       Third Prize (B Group) of National Physics Competition for College Students (Beijing, China)


PROFESSIONAL ACTIVITIES 

Member:AGU, EGU, COAA, CSSA, CESASC, PUAASC

Reviewer:GRL, ACP, JGR, IJOC, TC, etc.

Academic Interpreter(Chinese to English) for CNKI International Publishing Center

Treasurerfor COAA-SCC


Sponsor:中华人民共和国科学技术部,中国科学院
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