Index Catalog // ScholarsArchive@OSU

Creator:: Nakamura, Reina and Mahrt, Larry
Abstract:: The stable nocturnal boundary layer is commonly viewed or modelled as a balance between the temperature tendency (cooling) and vertical heat-flux divergence. Sometimes the radiative-flux divergence is also included. This perspective has dictated the design of field experiments for investigating stable nocturnal boundary layers. Tower-based micrometeorological data from three field...
Resource Type:: Article
Full Text:: through the towers. (b) FLOSSII Fluxes over Snow Surfaces II (FLOSSII) was conducted over grassland in

Creator:: Klipp, Cheryl L. and Mahrt, Larry
Abstract:: The correlation between dimensionless shear ϕₘ and dimensionless height z/L, where L is the Obukhov length, for stable conditions is strongly influenced by self‐correlation for the present datasets. This effect is quite large for stronger stability but still significant for near‐neutral conditions. A conditional analysis of nocturnal stable boundary‐layer data,...
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Full Text:: L. KLIPP and LARRY MAHRT∗ Oregon State University, Corvallis, USA (Received 21 August 2003; revised

Creator:: Mahrt, Larry and Vickers, D.
Abstract:: The sublimation of snow and evaporation of melted snow is contrasted between brush, grass and bare ground sites using eddy-correlation data. Averaged over the entire winter season, the evaporation/sublimation is about 20% greater over the brush site than the bare ground site, apparently due to greater supply of snow. Blowing...
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Full Text:: hourly-averaged air temperatures was less than −1 ◦C or greater than 1 ◦C. (b) Snow fractional coverage

Creator:: Lee, Young-Hee and Mahrt, Larry
Abstract:: This study evaluates the prediction of heat and moisture fluxes from a new land surface scheme with eddy correlation data collected at the old aspen site during the Boreal Ecosystem-Atmosphere Study (BOREAS) in 1994. The model used in this study couples a multilayer vegetation model with a soil model. Inclusion...
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Full Text:: q2 � qg Rk 2ð Þ=b ð2Þ Ta � T1 Ra ¼ 2 � 0:93 T1 � T1vð Þ Rb 1ð Þ L 1ð Þ þ S 1ð Þð Þ þ T1 � T2 Rk

Creator:: Vickers, Dean and Mahrt, Larry
Abstract:: Vertical profiles of the time-averaged wind stress, wind speed and buoyancy flux from the off-shore tower site in the Risø Air Sea Experiment are used to evaluate similarity theory in the coastal zone. The observed dependence of the non-dimensional wind shear on stability is compared to the traditional parametrization. Relationships...
Resource Type:: Article
Full Text:: stable case, proposed by Beljaars and Holtslag (1991), is where a = 1, b = 0.667, c = 5, and d = 0.35

Creator:: Vickers, Dean and Mahrt, Larry
Abstract:: Eddy‐correlation fluxes are compared to air‐sea fluxes predicted by a widely used bulk flux formulation without wave‐state effects. Systematic discrepancies are found. For example, the model approximately equates the roughness lengths for heat and moisture; however, the observed roughness length for heat (zoh) exceeds that for moisture (zoq) by an...
Resource Type:: Article

Creator:: Mahrt, Larry and Sun, Jielun
Abstract:: The value of the effective exchange coefficient for area-averaged fluxes can depend significantly on the averaging scale. This dependence implies that the exchange coefficient in numerical models should depend on grid size. The main goal of this study is the assessment of the importance of such scale-dependence. When the large-scale...
Resource Type:: Article
Full Text:: boundary layer. (b) Approach 2: Evaluation of spatial Reynolds terms Section 4 evaluates extra spatial

Creator:: Gerz, Thomas, Howell, Jim, and Mahrt, Larry
Abstract:: This study addresses the relationship between thermal microfronts and coherent vortex structures in homogeneous turbulence. The turbulence is created by mean shear in a weakly stratified flow. The data set is generated by direct numerical simulation providing highly resolved instantaneous three‐dimensional fields of fluctuating velocity and temperature (1603 data points...
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Full Text:: Larry Mahrt Citation: Phys. Fluids 6, 1242 (1994); doi: 10.1063/1.868293 View online: http

Creator:: Cuenca, Richard H., Ek, Michael, and Mahrt, Larry
Abstract:: Both the form of functional relationships applied for soil water properties and the natural field-scale variability of such properties can significantly impact simulation of the soil-plant-atmosphere system on a diurnal timescale. Various input parameters for soil water properties including effective saturation, residual water content, anerobiosis point, field capacity, and permanent...
Resource Type:: Article
Full Text:: and Larry Mahrt College of Oceanic and Atmospheric Sciences, Oregon State University, Corvallis

Creator:: Andreas, Edgar L., Mahrt, Larry, and Vickers, Dean
Abstract:: From almost 7000 near-surface eddy-covariance flux measurements over the sea, the authors deduce a new air–sea drag relation for aerodynamically rough flow: u* = 0.0583Uₙ₁₀ 2 0.243. Here u* is the measured friction velocity, and Uₙ₁₀ is the neutral-stability wind speed at a reference height of 10 m. This relation...
Resource Type:: Article
Full Text:: LARRY MAHRT NorthWest Research Associates, Inc., Corvallis, Oregon DEAN VICKERS College of Earth

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