World Library  


Add to Book Shelf
Flag as Inappropriate
Email this Book

On the Relationship Between Responses in Cloud Water and Precipitation to Changes in Aerosol : Volume 14, Issue 21 (11/11/2014)

By Lebo, Z. J.

Click here to view

Book Id: WPLBN0003993489
Format Type: PDF Article :
File Size: Pages 15
Reproduction Date: 2015

Title: On the Relationship Between Responses in Cloud Water and Precipitation to Changes in Aerosol : Volume 14, Issue 21 (11/11/2014)  
Author: Lebo, Z. J.
Volume: Vol. 14, Issue 21
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2014
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

APA MLA Chicago

Feingold, G., & Lebo, Z. J. (2014). On the Relationship Between Responses in Cloud Water and Precipitation to Changes in Aerosol : Volume 14, Issue 21 (11/11/2014). Retrieved from http://ebooklibrary.org/


Description
Description: Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, Colorado, USA. Climate models continue to exhibit strong sensitivity to the representation of aerosol effects on cloud reflectance and cloud amount. This paper evaluates a proposed method to constrain modeled cloud liquid water path (LWP) adjustments in response to changes in aerosol concentration Na using observations of precipitation susceptibility. Recent climate modeling has suggested a linear relationship between relative LWP responses to relative changes in Na, i.e., dln LWP / dln Na, and the precipitation frequency susceptibility Spop, which is defined as the relative change in the probability of precipitation for a relative change in Na. Using large-eddy simulations (LES) of marine stratocumulus and trade wind cumulus clouds, we show that these two cloud regimes exhibit qualitatively different relationships between λ and Spop; in stratocumulus clouds, λ increases with Spop, while in trade wind cumulus, λ decreases with Spop. The LES-derived relationship for marine stratocumulus is qualitatively similar but quantitatively different than that derived from climate model simulations of oceanic clouds aggregated over much larger spatial scales. We explore possible reasons for variability in these relationships, including the selected precipitation threshold and the various definitions of precipitation susceptibility that are currently in use. Because aerosol–cloud–precipitation interactions are inherently small-scale processes, we recommend that when deriving the relationship between λ and Spop, careful attention be given to the cloud regime, the scale, and the extent of aggregation of the model output or the observed data.

Summary
On the relationship between responses in cloud water and precipitation to changes in aerosol

Excerpt
Ackerman, A. S., Toon, O. B., and Hobbs, P. V.: A model for particle microphysics, turbulent mixing, and radiative transfer in the stratocumulus-topped marine boundary layer and comparisons with measurements, J. Atmos. Sci., 52, 1204–1236, 1995.; Ackerman, A. S., Kirkpatrick, M. P., Stevens, D. E., and Toon, O. B.: The impact of humidity above stratiform clouds on indirect aerosol climate forcing, Nature, 432, 1014–1017, 2004.; Albrecht, B.: Aerosols, cloud microphysics, and fractional cloudiness, Science, 245, 1227–1230, doi:10.1126/science.245.4923.1227, 1989.; Berner, A. H., Bretherton, C. S., and Wood, R.: Large-eddy simulation of mesoscale dynamics and entrainment around a pocket of open cells observed in VOCALS-REx RF06, Atmos. Chem. Phys., 11, 10525–10540, doi:10.5194/acp-11-10525-2011, 2011.; Bréon, F., Tanré, D., and Generoso, S.: Aerosol effect on cloud droplet size monitored from satellite, Science, 295, 834–838, doi:10.1126/science.1066434, 2002.; Bretherton, C. S., Blossey, P. N., and Uchida, J.: Cloud droplet sedimentation, entrainment efficiency, and subtropical stratocumulus albedo, Geophys. Res. Let., 34, doi:10.1029/2006GL027648, 2007.; Christensen, M. W. and Stephens, G. L.: Microphysical and macro physical responses of marine stratocumulus polluted by underlying ships: Eevidence of cloud deepening, J. Geophys. Res., 116, doi:10.1029/2010JD014638, 2011.; Conant, W. C., VanReken, T. M., Rissman, T. A., Varutbangkul, V., Jonsson, H. H., Nenes, A., Jimenez, J. L., Delia, A. E., Bahreini, R., Robets, G. C., Flagan, R. C., and Seinfeld, J. H.: Aerosol-cloud drop concentration closure in warm cumulus, J. Geophys. Res., 109, doi:10.1029/2003JD004324, 2004.; Cotton, W. R., Pielke Sr., R. A., Walko, R. L., Liston, G. E., Tremback, C. J., Jiang, H., McAnelly, R. L., Harrington, J. Y., Nicholls, M. E., Carrio, G. G., and McFadden, J. P.: RAMS 2001}: {Current status and future directions, Meteor. Atmos. Phys., 82, 5–29, doi:10.1007/s00703-001-0584-9, 2003.; Duong, H. T., Sorooshian, A., and Feingold, G.: Investigating potential biases in observed and modeled metrics of aerosol-cloud-precipitation interactions, Atmos. Chem. Phys., 11, 4027–4037, doi:10.5194/aco-11-4027-2011, 2011.; Feingold, G. and Siebert, H.: Cloud-aerosol interactions from the micro to cloud scale, in: Clouds in the perturbed climate system: their relationship to energy balance, atmospheric dynamics, and precipitation, edited by: Heintzenberg, J. and Charlson, R. J., MIT Press, 2009.; Feingold, G., Stevens, B., Cotton, W. R., and Frisch, A. S.: The relationship between drop incloud residence time and drizzle production in numerically simulated stratocumulus clouds, J. Atmos. Sci., 53, 1108–1122, 1996.; Feingold, G., Boers, R., Stevens, B., and Cotton, W. R.: A modeling study of the effect of drizzle on cloud optical depth and susceptibility, J. Geophys. Res., 102, 13527–13534, doi:10.1029/97JD00963, 1997.; Feingold, G., Walko, R. L., Stevens, B., and Cotton, W. R.: Simulations of marine stratocumulus using a new microphysical parameterization scheme, Atmos. Res., 47, 505–528, 1998.; Feingold, G., McComiskey, A., Rosenfeld, D., and Sorooshian, A.: On the relationship between cloud contact time and precipitation susceptibility to aerosol, J. Geophys. Res., 118, doi:10.1002/jgrd.50819, 2013.; Haynes, J. M., L'Ecuye

 

Click To View

Additional Books


  • Spatial Variation in Particle Number Siz... (by )
  • Vertical Distribution of Ozone and Vocs ... (by )
  • Ambient Concentrations of Aldehydes in R... (by )
  • Temperature Dependence of Yields of Seco... (by )
  • Technical Note: a Stratospheric Climatol... (by )
  • Technical Note: Using Deg Cpcs at Upper ... (by )
  • The Potential Impact of CloX Radical Com... (by )
  • The Effects of Turbulent Collision–coale... (by )
  • The Sudden Stratospheric Warming of the ... (by )
  • Global Error Maps of Aerosol Optical Pro... (by )
  • Dust-related Ice Nuclei Profiles from Po... (by )
  • Observational Estimates of Detrainment a... (by )
Scroll Left
Scroll Right

 



Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.