Aircraft measurements of black carbon vertical profiles show upper tropospheric variability and stability

作者：Schwarz Joshua P^*; Weinzierl Bernadett; Samset Bjorn H; Dollner Maximilian; Heimerl Katharina; Markovic Milos Z; Perring Anne E; Ziemba Luke

来源：Geophysical Research Letters, 2017, 44(2): 1132-1140.

DOI：10.1002/2016GL071241

• black carbon
• AeroCom
• SP2
• aerosol
• global models
• measurements

We present new data sets of black carbon (BC) aerosol mass mixing ratio (MMR) obtained from aircraft missions over North America, Europe, the Arctic, and the outflow region of Saharan Africa before and after trans-Atlantic transport. The data, collected from 2011 to 2013 with single-particle soot photometers, provide new insight into the variability and distribution of BC over global scales and refine understanding of AeroCom global model ensemble performance. The results indicate extensive global-scale longitudinal mixing of BC above altitude pressures as low as 400hPa. They also constrain the absolute and temporal variability of upper tropospheric BC MMR and point to opportunities for new tests of global aerosol models in the upper troposphere. A comparison to the AeroCom Phase II results generally reinforces previous estimates of the ensemble performance, except that it also strengthens confidence that the ensemble actually is biased high in the Arctic in all seasons.

• 出版日期2017-1-28