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Title: Vertical microphysical profiles of convective clouds as a tool for obtaining aerosol cloud-mediated climate forcings

Abstract

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 (Wb). 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 Wb 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 Wb and the satellite-retrieved cloud base drop concentrations (Ndb), which is the same as CCN(S). Developing and validating this methodology was possible thanks to the ASR/ARM measurements of CCN and vertical updraft profiles. Validation against ground-based CCN instruments at the ARM sites in Oklahoma, 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 semitransparent cirrus. The limitation for small solar backscattering angles of <25º restricts the satellite coverage to ~25% of themore » world area in a single day. This methodology will likely allow overcoming the challenge of quantifying the aerosol indirect effect and facilitate a substantial reduction of the uncertainty in anthropogenic climate forcing.« less

Authors:
 [1]
  1. Hebrew Univ. of Jerusalem (Israel)
Publication Date:
Research Org.:
The Hebrew University of Jerusalem (Israel)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
OSTI Identifier:
1233295
DOE Contract Number:  
SC0006787
Resource Type:
Technical Report
Resource Relation:
Related Information: 1. Rosenfeld D., Wang H., and Rasch P. J., 2012: The roles of cloud drop effective radius and LWP in determining rain properties in marine stratocumulus. Geophys. Res. Lett., 39, L13801, doi:10.1029/2012GL052028, 2012.2. Creamean J. M., K. J. Suski, D. Rosenfeld, A. Cazorla, P. J. DeMott, R. C. Sullivan, A. B. White, F. M. Ralph, P. Minnis, J. M. Comstock, J. M. Tomlinson, and K. A. Prather, 2013: Dust and Biological Aerosols from the Sahara and Asia Influence Precipitation in the Western US. Science, Vol. 339 no. 6127 pp. 1572-1578. DOI: 10.1126/science.12272793. Daniel Rosenfeld, Rei Chemke, Paul DeMott, Ryan C. Sullivan, Roy Rasmussen, Frank McDonough, Jennifer Comstock, Beat Schmid, Jason Tomlinson, Haflidi Jonsson, Kaitlyn Suski, Alberto Cazorla, Kimberly Prather, 2013. The Common Occurrence of Highly Supercooled Drizzle and Rain near the Coastal Regions of the Western United States. JGR. DOI: 10.1002/jgrd.50529.4. Zhu Y., D. Rosenfeld, X. Yu, G. Liu, J. Dai, X. Xu, 2014: Satellite retrieval of convective cloud base temperature based on the NPP/VIIRS Imager. Geophys. Res. Lett., 41, doi:10.1002/2013GL058970.5. Rosenfeld D., B. Fischman, Youtong Zheng, T. Goren, D. Giguzin, 2014: Combined satellite and radar retrievals of drop concentration and CCN at convective cloud base. GRL, DOI:10.1002/2014GL0594536. Zheng, Y., Rosenfeld, D., and Li, Z., 2015: Satellite Inference of Thermals and Cloud-Base Updraft Speeds Based on Retrieved Surface and Cloud-Base Temperatures. J. Atmos. Sci., 72, 2411–2428. doi: http://dx.doi.org/10.1175/JAS-D-14-0283.17. Zheng Y., D. Rosenfeld, 2015: Linear relation between convective cloud base height and updrafts and application to satellite retrievals. GRL 2015. doi: 10.1002/2015GL064809
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; Cloud aerosol interactions

Citation Formats

Rosenfeld, Daniel. Vertical microphysical profiles of convective clouds as a tool for obtaining aerosol cloud-mediated climate forcings. United States: N. p., 2015. Web. doi:10.2172/1233295.
Rosenfeld, Daniel. Vertical microphysical profiles of convective clouds as a tool for obtaining aerosol cloud-mediated climate forcings. United States. doi:10.2172/1233295.
Rosenfeld, Daniel. Wed . "Vertical microphysical profiles of convective clouds as a tool for obtaining aerosol cloud-mediated climate forcings". United States. doi:10.2172/1233295. https://www.osti.gov/servlets/purl/1233295.
@article{osti_1233295,
title = {Vertical microphysical profiles of convective clouds as a tool for obtaining aerosol cloud-mediated climate forcings},
author = {Rosenfeld, Daniel},
abstractNote = {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 (Wb). 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 Wb 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 Wb and the satellite-retrieved cloud base drop concentrations (Ndb), which is the same as CCN(S). Developing and validating this methodology was possible thanks to the ASR/ARM measurements of CCN and vertical updraft profiles. Validation against ground-based CCN instruments at the ARM sites in Oklahoma, 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 semitransparent cirrus. The limitation for small solar backscattering angles of <25º restricts the satellite coverage to ~25% of the world area in a single day. This methodology will likely allow overcoming the challenge of quantifying the aerosol indirect effect and facilitate a substantial reduction of the uncertainty in anthropogenic climate forcing.},
doi = {10.2172/1233295},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2015},
month = {12}
}

Works referenced in this record:

The roles of cloud drop effective radius and LWP in determining rain properties in marine stratocumulus : THE ROLES OF CLOUD DROP EFFECTIVE RADIUS
journal, July 2012

  • Rosenfeld, Daniel; Wang, Hailong; Rasch, Philip J.
  • Geophysical Research Letters, Vol. 39, Issue 13
  • DOI: 10.1029/2012GL052028

Dust and Biological Aerosols from the Sahara and Asia Influence Precipitation in the Western U.S.
journal, February 2013


The common occurrence of highly supercooled drizzle and rain near the coastal regions of the western United States: HIGHLY SUPERCOOLED DRIZZLE AND RAIN
journal, September 2013

  • Rosenfeld, Daniel; Chemke, Rei; DeMott, Paul
  • Journal of Geophysical Research: Atmospheres, Vol. 118, Issue 17
  • DOI: 10.1002/jgrd.50529

Satellite retrieval of convective cloud base temperature based on the NPP/VIIRS Imager
journal, February 2014

  • Zhu, Yannian; Rosenfeld, Daniel; Yu, Xing
  • Geophysical Research Letters, Vol. 41, Issue 4
  • DOI: 10.1002/2013GL058970

Combined satellite and radar retrievals of drop concentration and CCN at convective cloud base: ROSENFELD ET. AL.; RETRIEVING CONVECTIVE CLOUD BASE CCN
journal, May 2014

  • Rosenfeld, Daniel; Fischman, Baruch; Zheng, Youtong
  • Geophysical Research Letters, Vol. 41, Issue 9
  • DOI: 10.1002/2014GL059453

Satellite Inference of Thermals and Cloud-Base Updraft Speeds Based on Retrieved Surface and Cloud-Base Temperatures
journal, June 2015

  • Zheng, Youtong; Rosenfeld, Daniel; Li, Zhanqing
  • Journal of the Atmospheric Sciences, Vol. 72, Issue 6
  • DOI: 10.1175/JAS-D-14-0283.1

Linear relation between convective cloud base height and updrafts and application to satellite retrievals: SATELLITE RETRIEVAL OF CLOUD UPDRAFTS
journal, August 2015

  • Zheng, Youtong; Rosenfeld, Daniel
  • Geophysical Research Letters, Vol. 42, Issue 15
  • DOI: 10.1002/2015GL064809