BER launches Environmental System Science Program. Visit our new website under construction!

U.S. Department of Energy Office of Biological and Environmental Research

BER Research Highlights


Improving Model Representation of Convective Transport for Scale-Aware Parameterization
Published: April 27, 2015
Posted: May 19, 2016

Cumulus clouds play an important role in energy and water transfers in the climate system. However, representation of such clouds in the regional and global climate models is one of the major error sources of weather and climate predictions. Using the cloud-resolving modeling (CRM) simulations of convective clouds at the midlatitudes and tropics, a team of scientists, led by a U.S. Department of Energy researcher at Pacific Northwest National Laboratory, found the cumulus cloud fraction and convective transport of moisture by the unsolved cumulus clouds are strongly grid-spacing dependent. The team found that there are strong grid-spacing dependencies of updraft and downdraft fractions regardless of altitudes, cloud life stage, and geographical location. The single updraft approach for representing unsolved cumulus clouds significantly underestimates updraft eddy transport of water vapor because it fails to account for the large internal variability of updrafts, while a single downdraft represents the downdraft eddy transport of water vapor well. The team developed a new representation, accounting for the updraft variability and well representing the convective transport calculated from CRM simulations at different model grid-spacings.

Reference: Liu, Y.-C., J. Fan, G. Zhang, K.-M. Xu, and S. J. Ghan. 2015. “Improving Representation of Convective Transport for Scale-Aware Parameterization: 2. Analysis of Cloud-Resolving Model Simulations,” Journal of Geophysical Research Atmospheres 120(8), 3510-32. DOI: 10.1002/2014JD022145. (Reference link)

Contact: Dorothy Koch, SC-23.1, (301) 903-0105
Topic Areas:

  • Research Area: Earth and Environmental Systems Modeling

Division: SC-33.1 Earth and Environmental Sciences Division, BER

 

BER supports basic research and scientific user facilities to advance DOE missions in energy and environment. More about BER

Recent Highlights

Mar 23, 2021
Molecular Connections from Plants to Fungi to Ants
Lipids transfer energy and serve as an inter-kingdom communication tool in leaf-cutter ants&rsqu [more...]

Mar 19, 2021
Microbes Use Ancient Metabolism to Cycle Phosphorus
Microbial cycling of phosphorus through reduction-oxidation reactions is older and more widespre [more...]

Feb 22, 2021
Warming Soil Means Stronger Microbe Networks
Soil warming leads to more complex, larger, and more connected networks of microbes in those soi [more...]

Jan 27, 2021
Labeling the Thale Cress Metabolites
New data pipeline identifies metabolites following heavy isotope labeling.

Analysis [more...]

Aug 31, 2020
Novel Bacterial Clade Reveals Origin of Form I Rubisco
Objectives

  • All plant biomass is sourced from the carbon-fixing enzyme Rub [more...]

List all highlights (possible long download time)