https://trid.trb.org/ en-us Copyright © 2026. 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) https://trid.trb.org/Images/PageHeader-wTitle.jpg https://trid.trb.org/ https://trid.trb.org/View/2572965 Sat, 27 Sep 2025 13:02:22 GMT https://trid.trb.org/View/2572965 https://trid.trb.org/View/1787511 Wed, 22 Jan 2025 09:33:57 GMT https://trid.trb.org/View/1787511 https://trid.trb.org/View/1787266 Mon, 02 Dec 2024 12:49:31 GMT https://trid.trb.org/View/1787266 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 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 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 https://trid.trb.org/View/1879501 Thu, 28 Oct 2021 17:07:47 GMT https://trid.trb.org/View/1879501 https://trid.trb.org/View/1778609 Mon, 19 Apr 2021 17:21:23 GMT https://trid.trb.org/View/1778609 https://trid.trb.org/View/1757078 Mon, 28 Dec 2020 10:07:15 GMT https://trid.trb.org/View/1757078 https://trid.trb.org/View/1739868 Wed, 23 Sep 2020 10:48:34 GMT https://trid.trb.org/View/1739868 https://trid.trb.org/View/1696746 Wed, 22 Apr 2020 12:24:54 GMT https://trid.trb.org/View/1696746 https://trid.trb.org/View/1662219 Thu, 02 Apr 2020 09:43:01 GMT https://trid.trb.org/View/1662219 https://trid.trb.org/View/1553201 Thu, 01 Nov 2018 09:29:16 GMT https://trid.trb.org/View/1553201 https://trid.trb.org/View/1431054 Thu, 27 Sep 2018 16:12:45 GMT https://trid.trb.org/View/1431054 https://trid.trb.org/View/1524166 Thu, 26 Jul 2018 14:38:08 GMT https://trid.trb.org/View/1524166