1 / 10

Global 3-D Model Analysis of TRACE-P HCN and CH 3 CN Measurements

Global 3-D Model Analysis of TRACE-P HCN and CH 3 CN Measurements. Qinbin Li, Daniel J. Jacob, Robert M. Yantosca Harvard Atmospheric Chemistry Modeling Group Hanwant B. Singh NASA Ames Research Center Makoto Koike University of Tokyo Glen W. Sachse NASA-Langley Research Center.

harper
Download Presentation

Global 3-D Model Analysis of TRACE-P HCN and CH 3 CN Measurements

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Global 3-D Model Analysis of TRACE-P HCN and CH3CN Measurements Qinbin Li, Daniel J. Jacob, Robert M. Yantosca Harvard Atmospheric Chemistry Modeling Group Hanwant B. Singh NASA Ames Research Center Makoto Koike University of Tokyo Glen W. Sachse NASA-Langley Research Center

  2. Atmospheric Budget of HCN(pre-TRACE-P) Li et al. [2000] Biomass burning emission ratio (relative to CO): 1.1%.

  3. Vertical profiles in marine background atmosphere:Evidence for oceanic uptake of HCN and CH3CN Background: CO < 120 ppbv, C2Cl4 < 10 pptv Inferred saturation ratios: 0.84 for HCN, 0.80 for CH3CN

  4. CH3CN-HCN Correlation in TRACE-P Biomass burning “Shanghai plume” (flight 13) Biofuels (?) Red: C2Cl4 > 11 pptv Blue: C2Cl4 < 11 pptv

  5. Use HCN/CO and CH3CN/CO ratios measured in Chinese pollution plumes to infer biofuel emission ratios DC-8 Flight #13 Assuming fresh fossil fuel+biofuel emissions. CO: biofuel/(fossil fuel+biofuel) ~42% for Shanghai + Jiangsu + Zhejiang [D. Streets, 2001] . Hence HCN/CO biofuel emission ratio ~ 0.40%.

  6. Correlations: > 2 km Emission ratios relative to CO (% molar): Asian CO emissions (March 2001): 14 Tg fossil fuel 13 Tg biofuel 59 Tg biomass burning

  7. Simulated vs. observed vertical profiles Red: observation Blue: model Green: biomass burning Pink: biofuel Yellow (CO only): fossil fuel

  8. Simulated vs. observed frequency distributions Red: observation Blue: model

  9. Simulated vs. observed HCN columns Moshiri (44°N, 142°E) Rikubetsu (45°N, 144°E) Tsukuba (36°N, 140°E) Red: observation Blue: model

  10. Atmospheric Budgets for HCN and CH3CN Li et al. [2000] in red

More Related