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


Higher Clouds Retain Less Energy
Published: January 01, 2013
Posted: April 18, 2013

Clouds reflect incoming energy from the sun but trap outgoing energy from the Earth. How much energy clouds retain versus reflect determines their emissivity— their ability to act as a source of energy themselves. Satellite-based observations provide information about the top but not the bottom of clouds. Thus, ground-based observations are still important to understand the effect of clouds on the atmosphere and surface radiation balance. Scientists used the Atmospheric Radiation Measurement (ARM) Mobile Facility (AMF) dataset collected from Shouxian, China, in 2008 to simulate the downwelling radiances on the surface. Results show that emissivity of clouds decreases as the height of their bases increases. That is, the higher the bases of the clouds, the less those clouds can act as sources of energy. These results significantly improve our ability to quantify the impact of clouds forming at different altitudes on Earth’s energy budget.

Reference: Pan, L. J., and D. R. Lu. 2013. "A New Method for Retrieving Equivalent Cloud Base Height and Equivalent Emissivity by Using the Ground-Based Atmospheric Emitted Radiance Interferometer (AERI)," Science China - Earth Sciences 56(1), DOI: 10.1007/s11430-012-4398-z. (Reference link)

Contact: Wanda Ferrell, SC-23.1, (301) 903-0043, Rickey Petty, SC-23.1, (301) 903-5548
Topic Areas:

  • Research Area: Atmospheric System Research
  • Facility: DOE ARM User Facility

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)