TITLE

A steady-state analysis of the temperature responses of water vapor and aerosol lifetimes

AUTHOR(S)
Roelofs, G.-J.
PUB. DATE
August 2013
SOURCE
Atmospheric Chemistry & Physics;
SOURCE TYPE
DOC. TYPE
Article
ABSTRACT
The dominant removal mechanism of soluble aerosol is wet deposition. The atmospheric lifetime of aerosol, relevant for aerosol radiative forcing, is therefore coupled to the atmospheric cycling time of water vapor. This study investigates the coupling between water vapor and aerosol lifetimes in a well-mixed atmosphere. Based on a steady-state study by Pruppacher and Jaenicke (1995) we describe the coupling in terms of the processing efficiency of air by clouds and the efficiencies of water vapor condensation, of aerosol activation, and of the transfer from cloud water to precipitation. We extend this to expressions for the temperature responses of the water vapor and aerosol lifetimes. Previous climate model results (Held and Soden, 2006) suggest a water vapor lifetime temperature response of +5.3±2.0%K-1. This can be used as a first guess for the aerosol lifetime temperature response, but temperature sensitivities of the aerosol lifetime simulated in recent aerosol- climate model studies extend beyond this range and include negative values. This indicates that other influences probably have a larger impact on the computed aerosol lifetime than its temperature response, more specifically changes in the spatial distributions of aerosol (precursor) emissions and precipitation patterns, and changes in the activation efficiency of aerosol. These are not quantitatively evaluated in this study but we present suggestions for model experiments that may help to understand and quantify the different factors that determine the aerosol atmospheric lifetime.
ACCESSION #
90099478

 

Related Articles

  • Simulation of the anthropogenic aerosols over South Asia and their effects on Indian summer monsoon. Ji, Zhenming; Kang, Shichang; Zhang, Dongfeng; Zhu, Chunzi; Wu, Jia; Xu, Ying // Climate Dynamics;May2011, Vol. 36 Issue 9/10, p1633 

    regional climate model coupled with a chemistry-aerosol model is employed to simulate the anthropogenic aerosols including sulfate, black carbon and organic carbon and their direct effect on climate over South Asia. The model is driven by the NCAR/NCEP re-analysis data. Multi-year simulations...

  • Potential indirect effects of aerosol on tropical cyclone intensity: convective fluxes and cold-pool activity. Krall, G. M.; Cottom, W. R. // Atmospheric Chemistry & Physics Discussions;2012, Vol. 12 Issue 1, p351 

    Observational and model evidence suggest that a 2008 Western Pacific typhoon (NURI) ingested elevated concentrations of aerosol as it neared the Chinese coast. This study uses a regional model with two-moment bin-emulating microphysics to simulate the typhoon as it enters the field of elevated...

  • On the effect of decreasing CO concentration in the atmosphere. Bordi, Isabella; Fraedrich, Klaus; Sutera, Alfonso; Zhu, Xiuhua // Climate Dynamics;Feb2013, Vol. 40 Issue 3/4, p651 

    In the present paper the effect of an abrupt change of the atmospheric radiative forcing is investigated by means of a global climate model that includes a mixed layer ocean. In assessing if, under such a change, the model response has a bifurcation point, the steady solution is studied for a...

  • Impacts of climate change on temperature, precipitation and hydrology in Finland -- studies using bias corrected Regional Climate Model data. Olsson, T.; Jakkila, J.; Veijalainen, N.; Backman, L.; Kaurola, J.; Vehviläinen, B. // Hydrology & Earth System Sciences;2015, Vol. 19 Issue 7, p3217 

    Assessment of climate change impacts on climate and hydrology on catchment scale requires reliable information about the average values and climate fluctuations of the past, present and future. Regional climate models (RCMs) used in impact studies often produce biased time series of...

  • Study of cloud droplet number concentration using the A-Train satellites. S. Zeng; Riedi, J.; Trepte, C. R.; Winker, D. M.; Y.-X. Hu // Atmospheric Chemistry & Physics Discussions;2013, Vol. 13 Issue 11, p29035 

    Cloud droplet number concentration (CDNC) is an important microphysical property of liquid clouds that impacts radiative forcing, precipitation and it is pivotal for understanding of cloud-aerosols interactions. Current studies of this parameter at global scales with satellite observations are...

  • Monthly resolved biannual precipitation oxygen isoscape for Switzerland. Kern, Z.; Kohán, B.; Leuenberger, M. // Atmospheric Chemistry & Physics Discussions;2013, Vol. 13 Issue 4, p9895 

    Stable oxygen isotope composition of atmospheric precipitation (δ18Op) was scrutinized from 39 stations distributed over Switzerland and its border zone. Monthly amount-weighted δ18Op values averaged over the 1995--2000 period showed the expected strong linear altitude dependence...

  • Impact of horizontal resolution on simulation of precipitation extremes in an aqua-planet version of Community Atmospheric Model (CAM3). LI, FUYU; COLLINS, WILLIAM D.; WEHNER, MICHAEL F.; WILLIAMSON, DAVID L.; OLSON, JERRY G.; ALGIERI, CHRISTOPHER // Tellus: Series A;Oct2011, Vol. 63 Issue 5, p884 

    ABSTRACT One key question regarding current climate models is whether the projection of climate extremes converges to a realistic representation as the spatial and temporal resolutions of the model are increased. Ideally the model extreme statistics should approach a fixed distribution once the...

  • Climate response due to carbonaceous aerosols and aerosol-induced SST effects in NCAR community atmospheric model CAM3.5. Hsieh, W. -C.; Collins, W. D.; Liu, Y.; Chiang, J. C. H.; Shie, C. -L.; Caldeira, K.; Cao, L. // Atmospheric Chemistry & Physics Discussions;2013, Vol. 13 Issue 3, p7349 

    This study used Community Atmospheric Model 3.5 (CAM3.5) to investigate the effects of carbonaceous aerosols on climate. The simulations include control runs with carbonaceous aerosols and no carbon runs in which carbonaceous aerosols were removed. The Slab Ocean Model (SOM) and the fixed Sea...

  • Global impact of contemporary smoke aerosols from landscape fires on climate and the Hadley circulation. Tosca, M. G.; Randerson, J. T.; Zender, C. S. // Atmospheric Chemistry & Physics Discussions;2012, Vol. 12 Issue 10, p28069 

    Each year landscape fires across the globe emit black and organic carbon smoke particles that can last in the atmosphere for days to weeks. We characterized the climate response to these aerosols using a global Earth system model. We used remote sensing observations of aerosol optical depth...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics