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2 edition of Measuring and modeling near surface reflected and emitted radiation fluxes at the FIFE site found in the catalog.

Measuring and modeling near surface reflected and emitted radiation fluxes at the FIFE site

Measuring and modeling near surface reflected and emitted radiation fluxes at the FIFE site

semi-annual status report for April 15, 1987 - February 29, 1988

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Published by Center for Agricultural Meteorology and Climatology and Dept. of Agronomy, Instiute of Agriculture and Natural Resources, University of Nebraska-Lincoln, National Aeronautics and Space Administration, National Technical Information Service, distributor in Lincoln, Neb, [Washington, DC, Springfield, Va .
Written in English


Edition Notes

Statementby Blaine L. Blad ... [et al.]
SeriesNASA contractor report -- NASA CR-182660
ContributionsBlad, Blaine L, United States. National Aeronautics and Space Administration
The Physical Object
FormatMicroform
Pagination1 v
ID Numbers
Open LibraryOL14983113M

NLDAS uses the NCEP North American Regional Reanalysis and observed gauge precipitation as surface forcing to drive four land surface models, including the NCEP Noah land surface model (LSM), at deg resolution to produce a year () retrospective and more than three-year (present) near real-time hydrometeorological When measuring radiation reflected from a surface, what is really measured is the spectral radiance (i.e. the radiant flux density emanating from a given surface per unit solid angle and per unit wavelength, expressed in W m –2 sr –1 µm –1). Reflectance, a ratio of incoming to outgoing radiation, can be defined in a number of ways

where R lu is the upwelling longwave radiation, ε is the emissivity of the surface, σ is the Stefan‐Boltzmann constant, and R ld is the downwelling longwave radiation emitted by the atmosphere. Since ε is close to 1 for most soils and land covers, T s, r is the primary variable controlling R lu. In (1) T s, r can be estimated by measuring R lu using a radiometer or infrared thermometer Retrieval of radiation fluxes from tilted wide field-of-view radiometer measurements G. Louis Smith, Kathryn Bush Proc. SPIE. , Remote Sensing of Clouds and the Atmosphere X

Based on how much sunlight hits Earth versus how much is reflected, Earth’s average temperature should be well below freezing. Fortunately, there are other factors that affect the planet’s temperature. This module explores the effects of those factors, including distance from the sun, aerosol particles floating in the air, and greenhouse :// Consequently, the reflected flux will contribute significantly in the collected flux by IR camera. The modulated active pyrometry, using a bicolor camera, proposed in this paper allows a 2D surface temperature measurement independently of the reflected fluxes and the ://


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Measuring and modeling near surface reflected and emitted radiation fluxes at the FIFE site Download PDF EPUB FB2

Measuring and modeling near-surface reflected and emitted radiation fluxes at the FIFE site. By Elizabeth A. Walter-Shea, Mark A. Mesarch, Roel C. Vining, Patrick J. Starks, Blaine L. Blad and Cynthia J. Hays. Get PDF (5 MB) Abstract. Information is presented pertaining to the measurement and estimation of reflected and emitted components of   Get this from a library.

Measuring and modeling near-surface reflected and emitted radiation fluxes at the FIFE site: final report for period Ap [Blaine L Blad; University of Nebraska--Lincoln. Department of Agricultural Meteorology.; United States. National Aeronautics and Space Administration.;]   Get this from a library.

Measuring and modeling near surface reflected and emitted radiation fluxes at the FIFE site: semi-annual status report for Ap - Febru [Blaine L Blad; United States. National Aeronautics and Space Administration.;]   Measuring and Modeling Near Surface Reflected and Emitted Radiation Fluxes at the FIFE Site Semi-annual Status Report for Ap - Febru NASA Grant NAG by Blaine L.

Blad, John M. Norman, Elizabeth Walter-Shea Patrick Starks, Roe1 Vining and Cynthia Hays Center for Agricultural Meteorology and Climatology and Measuring and modeling near surface reflected and emitted radiation fluxes at the FIFE site. By Roel Vining, Blaine L.

Blad, Patrick Starks, John M. Norman, Elizabeth Walter-Shea and Cynthia Hays. Abstract. Research was conducted during the four Intensive Field Campaigns (IFC) of the FIFE project in The research was done on a tall grass Measuring and modeling near-surface reflected and emitted radiation fluxes at the FIFE site.

You can request the full-text of this book directly from the authors on :// Measuring and Modeling Near-Surface Reflected and Emitted Radiation Fluxes at the FIFE Site. Contact Information: Contact 1: Dr. Tanvir Shah Alabama A & M University Normal, AL () [email protected] Contact 2: Dr.

E.T. Kanemasu University of Georgia Griffin, GA () [email protected]:// Measuring and Modeling Near-Surface Reflected and Emitted Radiation Fluxes at the FIFE Site.

Contact Information: Contact 1: Cynthia J. Hays Lincoln, NE () Contact 2: Mark A. Mesarch Lincoln, NE () [email protected] Contact 3: Elizabeth A. Walter-Shea Lincoln, NE Components of Exposure.

Human exposure to a pollutant, and its consequent impact on health, results from the simultaneous occurrence of two events—a pollutant concentration c(x,t) at point x and time t, and the presence of people. Exposure=f[P(x,t), c(x,t)] where P(x,t) represents the number of people at point x and time t inhaling a pollutant at concentration c(x,t).

Figure is the radiation and heat budget for the forest at Virelles from late May to late October. All the fluxes were measured directly.

The direct sun radiation at the extra-atmospheric level was estimated from the tables of Linacre (); the albedo taken from Kondratyev (); the fraction of terrestrial radiation reaching space was estimated from Kondratyev (); heat flow in Measuring and modeling near-surface reflected and emitted radiation fluxes at the FIFE site.

Article. Jul ; Blaine L. Blad. Elizabeth :// Measuring and modeling near-surface reflected and emitted radiation fluxes at the FIFE site. Article. Jul ; Bidirectional reflectance, leaf optical and physiological properties of prairie   The d r y - d o w n of the FIFE region which occurred between July 9, and August 4, was observed in the N D V I / T s relation as an overall heating of the land surface Evapotranspiration from Combined Radiation (7) Following rainfall the relation recorded a cooling of the ://   Incoming energy heats the surface, the surface raises to a temperature and radiates that heat away as IR, the photon leaves the surface and interacts with a CO2 molecule raising it’s excitation state, nanoseconds later the photon is re-emitted as emission but there is an almost 50% chance that photon will be aimed toward the ground, when that C.J.

Hays's 21 research works with citations and reads, including: Estimating net radiation with remotely sensed data: Results from KUREX‐91 and FIFE studies∗   J. Appl. Ecol Bald-hi D. and Meyers T. () Trace gas exchange above the floor of de&duous f&St.

Eva&ration aid CO, efflux. aeon&. Res. Blad h. (z) I%asuring and modeling near-surface reflected and emitted radiation. In FIFE April Work- shop Report, internal NASA document (edited by Sellers Near-surface flux-profile relationships were developed rapidly between the s and s, when rapid progress shifted to the fair-weather convective boundary layer (CBL), though tropical CBL studies date back to the s.

In the s, ABL research began to include the interaction of the ABL with the surface and clouds, the first ABL   The surface fluxes of 1. Surface Longwave Radiation, 2. Thermals and 3. Evaporation are all losses that create surface cooling and so combine to produce the expected Surface Radiation flux of W/m 2, which equates to a thermodynamic temperature of Kelvin (15 o Celsius).

Landscape Ecology vol. 2 no. 1 pp () SPB Academic Publishing, The Hague Linking knowledge among spatial and temporal scales: Vegetation, atmosphere, climate and remote sensing Forrest G.

Hall, Donald E. Strebel, and Piers J. Sellers  › 百度文库 › 互联网. To show how ASTER can be used to model the surface energy fluxes, we combine ASTER imagery over the SMACEX site with implementations of two well-known energy balance models, the Two-Source Energy Balance approach (TSEB, Norman et al., ), and the Surface Energy Balance Algorithm for Land approach (SEBAL, Bastiaanssen et al., a).

By. An active sensor emits radiation in the direction of the target to be investigated. The sensor then detects and measures the radiation that is reflected or backscattered from the target. Passive sensors, on the other hand, detect natural energy (radiation) that is emitted or reflected by the object or scene being observed.

Reflected sunlight is Surface energy fluxes with the Advanced Spaceborne Thermal Emission and Reflection radiometer (ASTER) at the Iowa near surface air temperature and near surface humidity. The first two are readily estimated from remote sensing, while the last two reflected and emitted radiances.

Without sufficient accuracy, errors from estimates of H, RIn theory, the available energy, that is, the difference between net radiation and ground heat flux (G), is equal to the sum of SH and r, the observed available energy is usually larger than the sum of EC‐measured SH and LE, which indicates the imbalance of the surface energy balance closure ratio (EBR) accounts for 60–90% in most instances (Foken et al., ; Foken