U.S. flagAn official website of the United States government
                    Here's how you know **Official websites use .gov**
                            
                            A **.gov** website belongs to an official government organization in the United States.
 **Secure .gov websites use HTTPS**
                            
                            A **lock** (                            
                              A locked padlock                                                      
                            
                            ) or **https://** means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.


Menu Agricultural Research Service
						
                    U.S. DEPARTMENT OF AGRICULTURE
 close



Research
                Research Home
                            National Programs
                            Research Projects
                            Scientific Manuscripts
                            International Engagement
                            Scientific Software/Models
                            Databases and Datasets
                            Office of Scientific Quality Review
            Media
                News & Features
                            Multimedia
                            Briefing Room
                            Down on the Farm
                            Press Room
                            Science in Your Shopping Cart
                            Scientific Discoveries
                            Tellus
                            Under the Microscope
            About ARS
                About ARS Home
                            Staff Directory
                            Labs and Research Centers (Map)
                            Headquarter Offices
                            Organizational Chart
                            Employee Services (REE Employees Only)
                            Office of Outreach, Diversity, and Equal Opportunity
            Work With Us
                Work With Us Home
                            ARS Vacancies at USAJOBS
                            Careers at ARS Information
                            Scientific Collaborations
                            Extramural Agreements
                            1890 Faculty Research Sabbatical ProgramSearch small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Research Publications at this Location





- ARS National Programs
- Search for a scientific manuscript
- Search for a research project
- ARS Software
- Programs and Projects
- Collaborations
- Subjects of Investigation
- Publications

Title:   Author  item
                                            Jackson, Thomasitem
                                            Kustas, William

                                                         - *Bill*item
                                            TORN, M - LAWRENCE BERKELEY NATIONAitem
                                            MEYERS, T - NOAAitem
                                            Prueger, Johnitem
                                            FISCHER, M - LAWRENCE BERKELEY NATIONAitem
                                            AVISSAR, R - DUKE UNIVERSITYitem
                                            YUEH, S - NASA JPLitem
                                            Anderson, Marthaitem
                                            MILLER, M - BROOKHAVEN NATIONAL LAB
  Submitted to: American Geophysical Union
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 10/14/2006
                                    Publication  Date: 12/11/2006
                                    Citation: Jackson, T.J., Kustas, W.P., Torn, M.S., Meyers, T., Prueger, J.H., Fischer, M., Avissar, R., Yueh, S., Anderson, M.C., Miller, M. 2006. Surface characterization for land-atmosphere studies of CLASIC [abstract]. EOS Transactions, American Geophysical Union, Fall Supplements. 87(52):H13H-04.Interpretive Summary:
                                Technical Abstract: The Cloud and Land Surface Interaction Campaign will focus on interactions between the land surface, convective boundary layer, and cumulus clouds. It will take place in the Southern Great Plains (SGP) area of the U.S, specifically within the US DOE ARM Climate Research Facility. The intensive observing period will be June of 2007, which typically covers the winter wheat harvest in the region. This region has been the focus of several related experiments that include SGP97, SGP99, and SMEX03.  For the land surface, some of the specific science questions include 1) how do spatial variations in land cover along this trajectory modulate the cloud structure and the low-level water vapor budget, 2) what are the relationships between land surface characteristics (i.e., soil texture, vegetation type and fractional cover) and states (particularly soil moisture and surface temperature) and the resulting  impact of the surface energy balance on boundary layer and cloud structure and dynamics and aerosol loading; and 3) what is the interplay between  cumulus cloud development and surface energy balance partitioning between latent and sensible heat, and implications for the carbon flux? Most of these objectives will require flux and state measurements throughout the dominant land covers and distributed over the geographic domain. These observations would allow determining the level of up-scaling/aggregation required in order to understand the impact of landscape changes affecting energy balance/flux partitioning and impact on cloud/atmospheric dynamics. Specific contributions that are planned to be added to CLASIC include continuous tower-based  monitoring of surface fluxes for key land cover types prior to, during, and post-IOP, replicate towers to quantify flux variance within each land cover, boundary layer properties and fluxes from a helicopter-based system,  airplane- and satellite-based flux products throughout the region, aircraft- and tower-based concentration data for carbon cycle gases and isotopes; regional soil moisture from satellites and mapping aircraft, intensive soil moisture for specific regions within the domain using in-situ networks and a new passive-active aircraft sensor system, and cooperation with CLASIC in the development of geographic resources including land cover, crop residue, hyper spectral reflectance, NDVI, and LAI products for each land use. The basic elements of the experiment have been defined; however, additional participation by other groups to enhance observations or analyses is needed.


Return to top


Connect with ARS Sign up


ARS Home
                            USDA.gov
                            Plain Writing
                            Policies & Links
                            Civil Rights Statements
                            FOIA
                            Accessibility Statement
                            Privacy Policy
                            Non-Discrimination Statement
                            Quality of Information
                            USA.gov
                            WhiteHouse.gov