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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Satellite retrieval of cloud condensation nuclei concentrations by using clouds as CCN chambers

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Rosenfeld, Daniel [1] ; Zheng, Youtong [2, 3, 4] ; Hashimshoni, Eyal [1] ; Poehlker, Mira L. [5, 6] ; Jefferson, Anne [7] ; Poehlker, Christopher [5] ; Yu, Xing [8] ; Zhu, Yannian [8, 2] ; Liu, Guihua [8] ; Yue, Zhiguo [8] ; Fischman, Baruch [1] ; Li, Zhanqing [2, 3, 4] ; Giguzin, David [1] ; Goren, Tom [1] ; Artaxo, Paulo [9] ; Barbosa, Henrique M. J. [9] ; Poeschl, Ulrich [5, 6] ; Andreae, Meinrat O. [5]
Total Authors: 18
[1] Hebrew Univ Jerusalem, Inst Earth Sci, IL-91904 Jerusalem - Israel
[2] Beijing Normal Univ, Coll Global Change & Earth Syst Sci, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875 - Peoples R China
[3] Univ Maryland, Dept Atmospher & Ocean Sci, College Pk, MD 20740 - USA
[4] Univ Maryland, Earth Syst Sci Interdisciplinary Ctr, College Pk, MD 20740 - USA
[5] Max Planck Inst Chem, Biogeochem Dept, D-55020 Mainz - Germany
[6] Max Planck Inst Chem, Multiphase Chem Dept, D-55020 Mainz - Germany
[7] NOAA, Earth Syst Res Lab, Boulder, CO 80305 - USA
[8] Meteorol Inst Shaanxi Prov, Xian 710015 - Peoples R China
[9] Univ Sao Paulo, Inst Phys, BR-05508090 Sao Paulo - Brazil
Total Affiliations: 9
Document type: Journal article
Source: Proceedings of the National Academy of Sciences of the United States of America; v. 113, n. 21, p. 5828-5834, MAY 24 2016.
Web of Science Citations: 31

Quantifying the aerosol/cloud-mediated radiative effect at a global scale requires simultaneous satellite retrievals of cloud condensation nuclei (CCN) concentrations and cloud base updraft velocities (W-b). Hitherto, the inability to do so has been a major cause of high uncertainty regarding anthropogenic aerosol/cloud-mediated radiative forcing. This can be addressed by the emerging capability of estimating CCN and W-b of boundary layer convective clouds from an operational polar orbiting weather satellite. Our methodology uses such clouds as an effective analog for CCN chambers. The cloud base supersaturation (S) is determined by W-b and the satellite-retrieved cloud base drop concentrations (N-db), which is the same as CCN(S). Validation against ground-based CCN instruments at Oklahoma, at Manaus, and onboard a ship in the northeast Pacific showed a retrieval accuracy of +/- 25% to +/- 30% for individual satellite overpasses. The methodology is presently limited to boundary layer not raining convective clouds of at least 1 km depth that are not obscured by upper layer clouds, including semi-transparent cirrus. The limitation for small solar backscattering angles of < 25 degrees restricts the satellite coverage to similar to 25% of the world area in a single day. (AU)

FAPESP's process: 13/05014-0 - GoAmazon: interactions of the urban plume of Manaus with biogenic forest emissions in Amazonia
Grantee:Paulo Eduardo Artaxo Netto
Support type: Research Program on Global Climate Change - Thematic Grants
FAPESP's process: 13/50510-5 - Brazil-USA collaborative research: modifications by anthropogenic pollution of the natural atmospheric chemistry and particle microphysics of the tropical rain forest during GoAmazon intensive operating periods
Grantee:Henrique de Melo Jorge Barbosa
Support type: Research Program on Global Climate Change - Regular Grants