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Moran, M., Scott, R., Keefer, T., Emmerich, W., Hernandez, M., Nearing, G., Paige, G., Cosh, M., O’Neill, P.
Information about the ratio of transpiration (T) to total evapotranspiration (T/ET) is related to critical global change concerns, including shrub encroachment and non-native species invasion. In this study, a new approach was developed to partition measurements …
Journal: Agricultural And Forest Meteorology, Volume 149 (1): 59-72 (2009). DOI: 10.1016/j.agrformet.2008.07.004 Sites: US-Whs, US-Wkg
Moran, M. S., Scott, R. L., Hamerlynck, E. P., Green, K. N., Emmerich, W. E., Holifield Collins, C. D.
Across the western United States, warm-season grasslands are being invaded by the exotic perennial grass, Eragrostis lehmanniana (Lehmann lovegrass). The objective of this study was to quantify the change in surface water balance, particularly the evaporation from bare soil, associated with E. lehmanniana invasion. …
Journal: Agricultural And Forest Meteorology, Volume 149 (12): 2133-2142 (2009). DOI: 10.1016/j.agrformet.2009.03.018 Sites: US-Wkg
Li, F., Kustas, W. P., Anderson, M. C., Prueger, J. H., Scott, R. L.
Validation comparisons between satellite-based surface energy balance models and tower-based flux measurements over heterogeneous landscapes can be strongly influenced by the spatial resolution of the remote sensing inputs. In this paper, a two-source energy balance model developed to use thermal and visible /near-infrared remotely …
Journal: Remote Sensing Of Environment, Volume 112 (2): 337-349 (2008). DOI: 10.1016/j.rse.2006.11.032 Sites: US-Whs, US-Wkg
Watts, C. J., Scott, R. L., Garatuza-Payan, J., Rodriguez, J. C., Prueger, J. H., Kustas, W. P., Douglas, M.
The vegetation in the core region of the North American monsoon (NAM) system changes dramatically after the onset of the summer rains so that large changes may be expected in the surface fluxes of radiation, heat, and moisture. Most of this region lies in the rugged terrain of western Mexico and very few measurements of these fluxes …
Journal: Journal Of Climate, Volume 20 (9): 1810-1820 (2007). DOI: 10.1175/jcli4088.1 Sites: US-Whs, US-Wkg
Emmerich, W. E.
Ecosystem water use efficiency (EWUE) is defined as the net carbon uptake per amount of water lost from the ecosystem and is a useful measure of the functionality in semiarid shrub and grassland communities. C4 grasses have higher water use efficiency (WUE) than do C3 shrubs, although it has been postulated …
Journal: Rangeland Ecology & Management, Volume 60 (5): 464-470 (2007). DOI: 10.2111/1551-5028(2007)60[464:ewueia]2.0.co;2 Sites: US-Wkg
Emmerich, W. E.
Carbon dioxide is increasing in the atmosphere due to human activities. Over long time periods semiarid soils have sequestered inorganic carbon to accumulate the third largest global carbon pool. The hypothesis for this study was that these soils are maintaining this carbon pool under present climatic conditions and are a sink for …
Journal: Agricultural And Forest Meteorology, Volume 116 (1-2): 91-102 (2003). DOI: 10.1016/s0168-1923(02)00231-9 Sites: US-Wkg