Transport Research International Documentation (TRID) https://trid.trb.org/ en-us Copyright © 2024. National Academy of Sciences. All rights reserved. http://blogs.law.harvard.edu/tech/rss tris-trb@nas.edu (Bill McLeod) tris-trb@nas.edu (Bill McLeod) Transport Research International Documentation (TRID) https://trid.trb.org/Images/PageHeader-wTitle.jpg https://trid.trb.org/ Impacts of forest harvesting on mercury concentrations and methylmercury production in boreal forest soils and stream sediment https://trid.trb.org/View/2296266 75%) of harvested watershed area and more road construction had significantly increased THg and MeHg concentrations, %-MeHg, K[subscript meth] and total carbon content post-harvest. From these patterns, we infer that inputs of carbon and inorganic Hg into harvest-impacted stream sediment are likely sourced from the harvested upland areas and stimulate in situ MeHg production in stream sediment. These findings indicate the importance of stream sediment as potential MeHg pools in harvested forest watersheds. The findings also demonstrate that forest management practices aiming to mitigate organic matter and Hg inputs to streams can effectively alleviate harvesting impacts on Hg methylation and MeHg concentrations in stream sediment.]]> Wed, 27 Mar 2024 11:52:26 GMT https://trid.trb.org/View/2296266 Spatiotemporal variation and inter-transport of atmospheric speciated mercury between Kaohsiung Harbor and neighboring urban areas https://trid.trb.org/View/2305055  fall > spring > summer. Concerning spatial distribution, ASM concentrations in the port areas were generally higher than those in the urban areas. This disparity was chiefly attributed to the influence of the prevailing winds, local sources, and atmospheric dispersion. Backward trajectory simulation revealed that polluted air masses blown from the northeast in winter and spring, moving along the western in-land part of Taiwan Island, were likely influenced by local sources and long-range transport (LRT). In summer, air pollutants originating from the south were likely transported from the coastal industrial sources. During fall, air masses blown from the western offshore waters transport air pollutants from Kaohsiung Harbor to neighboring Metro Kaohsiung. The results obtained from principle component analysis (PCA) indicated that primary sources in the port areas included ship emissions, vehicular exhausts, and nearby industrial complex, which align with the primary source factors identified by the positive matrix factorization (PMF), which were mobile sources and coal-fired industrial boilers. Meanwhile, mobile sources and sulfur-containing fuel/waste combustion were identified as the primary sources in the urban areas.]]> Wed, 27 Mar 2024 11:52:26 GMT https://trid.trb.org/View/2305055 Land use impact on mercury in sediments and macrophytes from a natural lake in the Brazilian savanna https://trid.trb.org/View/2251363 0), with concentrations exceeding the SQG in 2019. In 2012, [THg] in sediments ranged from 20.7 to 74.6 ng g⁻¹, and in 2019 they ranged from 129.1 to 318.2 ng g⁻¹. In macrophytes, [THg] ranged from 14.0 to 42.1 ng g⁻¹ in 2012, to 53.0 and 175.3 ng g⁻¹ in 2019. [THg] in bottom sediments and macrophytes were significantly higher in the second collection period (p < 0.05). There was no significant difference in BAF values between the periods and no significant bioaccumulation in macrophytes (BAF <1). The authors' results demonstrated that the macrophytes are not sensitive indicators of Hg pollution in lentic environments of the Brazilian Savanna; however, the increased land use intensity (agriculture, automotive traffic, and urban infrastructure) could increase Hg accumulation in sediments and macrophytes in a short time interval.]]> Mon, 13 Nov 2023 09:01:28 GMT https://trid.trb.org/View/2251363 In-line measurement of exhaust mercury emissions by an instrumented light-duty vehicle using both on-road and test track experiments https://trid.trb.org/View/1879501 Thu, 28 Oct 2021 17:07:47 GMT https://trid.trb.org/View/1879501 Elevated concentrations of mercury and methylmercury in the Gadani shipbreaking area, Pakistan https://trid.trb.org/View/1778609 Mon, 19 Apr 2021 17:21:23 GMT https://trid.trb.org/View/1778609 Mercury in the Bottom Sediments of the Ship Channel and River Mouths: the Vistula Lagoon https://trid.trb.org/View/1757078 Mon, 28 Dec 2020 10:07:15 GMT https://trid.trb.org/View/1757078 Impact of emission reductions and meteorology changes on atmospheric mercury concentrations during the COVID-19 lockdown https://trid.trb.org/View/1739868 Wed, 23 Sep 2020 10:48:34 GMT https://trid.trb.org/View/1739868 Special Crash Investigations: On-Site Alleged Air Bag Malfunction Investigation Vehicle: 2005 Mercury Mountaineer Location: Arkansas Crash Date: August 2016 https://trid.trb.org/View/1696746 Wed, 22 Apr 2020 12:24:54 GMT https://trid.trb.org/View/1696746 Effective Light Source for Illuminating Overhead Guide Signs and Improving Roadway Safety https://trid.trb.org/View/1662219 Thu, 02 Apr 2020 09:43:01 GMT https://trid.trb.org/View/1662219 Measuring the Pore Structure of Cement Asphalt Mortar by Nuclear Magnetic Resonance https://trid.trb.org/View/1553201 Thu, 01 Nov 2018 09:29:16 GMT https://trid.trb.org/View/1553201 On-Road Comparison of Driving Performance Measures When Using Handheld and Voice-Control Interfaces for Mobile Phones and Portable Music Players https://trid.trb.org/View/1431054 Thu, 27 Sep 2018 16:12:45 GMT https://trid.trb.org/View/1431054 Special Crash Investigations On-Site Guardrail End Treatment Impact Investigation; Vehicle: 2008 Mercury Mariner Location: Pennsylvania Crash Date: November 2016 https://trid.trb.org/View/1524166 Thu, 26 Jul 2018 14:38:08 GMT https://trid.trb.org/View/1524166 Investigation of Microscopic Air Void Structure of Anti-Freezing Asphalt Pavement with X-Ray CT and MIP https://trid.trb.org/View/1515416 Wed, 25 Jul 2018 09:23:03 GMT https://trid.trb.org/View/1515416 Calibrating the Iowa Pore Index with Mercury Intrusion Porosimetry and Petrography https://trid.trb.org/View/1485616 Fri, 20 Oct 2017 09:53:59 GMT https://trid.trb.org/View/1485616 Simulating the Mobility of Wheeled Ground Vehicles with Mercury https://trid.trb.org/View/1461280 Tue, 16 May 2017 09:30:44 GMT https://trid.trb.org/View/1461280