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Improving Transport and Lifecycle of Black Carbon and Dust in the Community Earth System Model
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| 자료유형 | 학위논문 |
|---|---|
| 서명/저자사항 | Improving Transport and Lifecycle of Black Carbon and Dust in the Community Earth System Model. |
| 개인저자 | Wu, Mingxuan. |
| 단체저자명 | University of Wyoming. Atmospheric Science. |
| 발행사항 | [S.l.]: University of Wyoming., 2019. |
| 발행사항 | Ann Arbor: ProQuest Dissertations & Theses, 2019. |
| 형태사항 | 159 p. |
| 기본자료 저록 | Dissertations Abstracts International 81-04A. Dissertation Abstract International |
| ISBN | 9781088383360 |
| 학위논문주기 | Thesis (Ph.D.)--University of Wyoming, 2019. |
| 일반주기 |
Source: Dissertations Abstracts International, Volume: 81-04, Section: A.
Advisor: Liu, Xiaohong. |
| 이용제한사항 | This item must not be sold to any third party vendors.This item must not be added to any third party search indexes. |
| 요약 | Black carbon (BC) and dust play important roles in the Earth's climate. In this study, to improve BC transport and lifecycle, the aerosol dry deposition scheme of Petroff and Zhang (2010) (PZ10) is implemented into the Community Earth System Model version 1 (CESM1), and model simulations using PZ10 are compared with the one using the default scheme of Zhang et al. (2001) (Z01) and observations. The PZ10 scheme predicts much lower dry deposition velocities than Z01 for fine particles in Aitken, primary carbon, and accumulation modes, resulting in 23.2% higher global mean BC column burdens. The PZ10 scheme improves the agreement with observations of BC profiles in the lower troposphere in the Arctic as well as the simulation of BC surface concentrations in high-latitudes remote regions. We evaluate the spatial distributions and temporal variations of dust extinction profiles and dust optical depth (DOD) simulated from CESM1, CESM2, the Energy Exascale Earth System Model version 1 (E3SMv1), and the Modern-Era Retrospective analysis for Research and Applications version 2 (MERRA2) with satellite retrievals from Luo et al. (2015a, 2015b) (L15), Yu et al. (2015) (Y15), Moderate Resolution Imaging Spectroradiometer (MODIS), and Multi-angle Imaging SpectroRadiometer (MISR). We find that CESM1, CESM2, and E3SMv1 underestimate dust transport to remote regions. E3SMv1 improves dust transport and performs better than CESM1 and CESM2 in the Northern Hemisphere (NH) due to higher fraction of fine dust. CESM2 has the worst performance in the NH due to the underestimation of dust emission in North Africa but improves dust simulations in the Southern Hemisphere (SH) due to the overestimation of dust emissions in the SH source regions. We further examine dust modeling in East Asia. High model biases of dust extinction in the upper troposphere over the Taklamakan desert, Gobi desert, and Tibetan Plateau are found. CESM1 with the dust emission scheme of Kok et al. (2014a, 2014b) has the best agreement with observations from over the Taklamakan desert and Tibetan Plateau. CESM1 underestimates dust surface concentrations at most weather stations due to the inability of CESM1 to capture strong surface wind events. |
| 일반주제명 | Atmospheric sciences. Atmospheric chemistry. Asian studies. Climate change. |
| 언어 | 영어 |
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