In situ constraints on the vertical distribution of global aerosol
| Autor: | D. Watson-Parris, N. Schutgens, C. Reddington, K. J. Pringle, D. Liu, J. D. Allan, H. Coe, K. S. Carslaw, P. Stier |
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| Přispěvatelé: | Earth and Climate |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
In situ
Atmospheric Science 010504 meteorology & atmospheric sciences business.industry Distribution (economics) Forcing (mathematics) 010501 environmental sciences Atmospheric sciences 01 natural sciences lcsh:QC1-999 Aerosol Troposphere lcsh:Chemistry lcsh:QD1-999 13. Climate action Range (statistics) Cloud condensation nuclei Environmental science business lcsh:Physics 0105 earth and related environmental sciences |
| Zdroj: | Atmospheric Chemistry and Physics, Vol 19, Pp 11765-11790 (2019) Atmospheric Chemistry and Physics Watson-Parris, D, Schutgens, N, Reddington, C, Pringle, K J, Liu, D, Allan, J D, Coe, H, Carslaw, K S & Stier, P 2019, ' In situ constraints on the vertical distribution of global aerosol ', Atmospheric Chemistry and Physics, vol. 19, no. 18, pp. 11765-11790 . https://doi.org/10.5194/acp-19-11765-2019 Atmospheric Chemistry and Physics, 19(18), 11765-11790. European Geosciences Union |
| ISSN: | 1680-7324 1680-7316 |
| Popis: | Despite ongoing efforts, the vertical distribution of aerosols globally is poorly understood. This in turn leads to large uncertainties in the contributions of the direct and indirect aerosol forcing on climate. Using the Global Aerosol Synthesis and Science Project (GASSP) database – the largest synthesised collection of in-situ aircraft measurements currently available, with more than 1000 flights from 37 campaigns from around the world – we investigate the vertical structure of sub-micron aerosols across a wide range of regions and environments. The application of this unique dataset to assess the vertical distributions of number size distribution and Cloud Condensation Nuclei (CCN) in the global aerosol-climate model ECHAM-HAM reveals that the model underestimates accumulation mode particles in the upper troposphere, especially in remote regions. The processes underlying this discrepancy are explored using different aerosol microphysical schemes and a process sensitivity analysis. These show that the biases are predominantly related to aerosol ageing and removal rather than emissions. |
| Databáze: | OpenAIRE |
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