Issue 10 Volume 41 May 16, 2003

Stainless steel-clad rebar provides an opportunity to significantly increase the CT threshold concentration associated with
active corrosion initiation compared to plain carbon steel. However, threshold CT concentrations for 316L stainless steel-clad
rebar are unknown. Moreover, the impact of possible galvanic corrosion between the clad layer and any exposed carbon steel
core has not been investigated.
NTIS
Thresholds; Chlorides; Stainless Steels; Reinforcing Materials; Concrete Structures; Bridges (Structures); Service Life
42
GEOSCIENCES (GENERAL)
Includes general research topics related to the Earth sciences, and the specific areas of petrology, mineralogy, and general geology. For
other specific topics in geosciences see categories 42 through 48.
20030032470 California Univ., San Diego, CA, USA
[Results for SHEBA/FIRE]
Valero, Francisco P. J.; March 21, 2003; 4 pp.; In English; Original document is slightly crooked with black and white
illustrations.
Contract(s)/Grant(s): NAG1-2044; No Copyright; Avail: CASI; A01, Hardcopy
The Atmospheric Research Laboratory’s Radiation Measurement System (RAMS) was on the NCAR C-130 aircraft in
May and July 1998, collecting radiometric data on the science flights conducted in the vicinity of the Surface Heat Budget
of the Arctic Ocean (SHEBA) ship. These measurements were part of the FIRE Arctic Cloud Experiment (FIRE ACE).
Analysis of some of the data focused on the absorption, reflection, and transmittance of Arctic clouds, especially compared
to model results. In order to assess the absorption of solar radiation by the clear and cloudy atmosphere in the Arctic the
measurements from the radiometers were combined in pairs of above-cloud segments and below-cloud segments. To get these
pairs, the data for all sixteen of the flights (8 in May and 8 in July) were examined for occurrences of low-altitude segments
in proximity to high-altitude segments. The low-altitude data are then treated as measurements of the bottom of a layer and
the high-altitude data are taken as measurements of the top of the layer. With measurements of the upwelling and downwelling
irradiances above and below a layer one can determine the reflectance, transmittance, and absorptance of the layer.
Attachment: Doelling, D.R., P. Minnis, D.A. Spangenberg, V. Chakrapani, A. Mahesh, S.K. Pope, and F.P.J. Valero, Cloud
radiative forcing at the top of the atmosphere during FIRE ACE derived from AVHRR data, J. Geophys. Res. 106,
15,279-15,296,2001. Minnis, P., D.R. Doelling, D.A. Spangenberg, A. Mahesh, S.K. Pope, and F.P.J. Valero, AVHRR-derived
cloud radiative forcing over the ARM NSA and SHEBA site during FIRE ACE, abstract submitted to the ARM Science Team
Meeting, San Antonio, TX, Ma.13-17,2000. Pope, S.K., and F.P.J. Valero, Measured and modeled radiometric fluxes in the
Arctic during FIRE-ACE, presented as a poster at the American Geophysical Union meeting, San Francisco, CA, Dec. 13-17,
1999. Pope, S.K., and F.P.J. Valero, Measured and modeled radiometric fluxes in the Arctic during FIRE-ACEy paper
presented at SHEBA/FIRE Workshop, National Center for Atmospheric Research, Boulder, Colo., Apr. 17-20,2000.
Derived from text
Data Acquisition; Advanced Very High Resolution Radiometer; Atmospheric Radiation; Fires; Irradiance; Radiation
Absorption; Radiation Measurement; Arctic Regions; Clouds (Meteorology)
20030033842 Pacific Northwest National Lab., Richland, WA
Vadose Zone Transport Field: FY2002 Test Plan
Ward, A. L.; Gee, F. W.; May 2002; In English
Report No.(s): DE2002-15001410; PNNL-13857; No Copyright; Avail: National Technical Information Service (NTIS)
This project will use a combination of geophysical and soil-physics techniques to investigate the infiltration and
redistribution of water and dilute tracers in a controlled field experiment at the Army loop Road clastic dike site. In the FY
2002 tests, surface-deployed ground-penetrating radar will be used to identify the discrete pattern of horizonation that
comprises the coarse component of the heterogeneity along a 60-m (197-ft) transect. Undisturbed cores from major
sedimentary facies will be used to quantify hydraulic properties in the laboratory. The transect will be instrumented to allow
water to be applied along its length from a line source. Local-scale water content, matric potential, and tracer concentrations
will be monitored as a function of spatial scale by multipurpose Time Domain Reflectometry (TDR) probes and suction
lysimeters. The tension infiltrometer will be used to measure mobile-immobile parameters. The resulting data will be used to
characterize fine-scale heterogeneity as well as correlation lengths of hydraulic and transport parameters. Tracer-breakthrough
data will be used to determine longitudinal and transverse dispersivities and their scale dependence. Parameters will be
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