eprintid: 10165620
rev_number: 9
eprint_status: archive
userid: 699
dir: disk0/10/16/56/20
datestamp: 2023-02-28 12:03:22
lastmod: 2023-02-28 12:03:22
status_changed: 2023-02-28 12:03:22
type: article
metadata_visibility: show
sword_depositor: 699
creators_name: Yang, Handong
creators_name: Macario-González, Laura
creators_name: Cohuo, Sergio
creators_name: Whitmore, Thomas J
creators_name: Salgado, Jorge
creators_name: Peréz, Liseth
creators_name: Schwalb, Antje
creators_name: Rose, Neil L
creators_name: Holmes, Jonathan
creators_name: Riedinger-Whitmore, Melanie A
creators_name: Hoelzmann, Philipp
creators_name: O'Dea, Aaron
title: Mercury Pollution History in Tropical and Subtropical American Lakes: Multiple Impacts and the Possible Relationship with Climate Change
ispublished: inpress
divisions: UCL
divisions: B03
divisions: C03
divisions: F26
keywords: Atmospheric deposition, climate impact, human impact, lake sediments, pollutants, secondary pollution, subtropics, tropics
note: This work is licensed under an Attribution 4.0 International License (CC BY 4.0).
abstract: Sediment cores obtained from 11 tropical and subtropical American lakes revealed that local human activities significantly increased mercury (Hg) inputs and pollution levels. Remote lakes also have been contaminated by anthropogenic Hg through atmospheric depositions. Long-term sediment-core profiles revealed an approximately 3-fold increase in Hg fluxes to sediments from c. 1850 to 2000. Generalized additive models indicate that c. 3-fold increases in Hg fluxes also occurred since 2000 in the remote sites, while Hg emissions from anthropogenic sources have remained relatively stable. The tropical and subtropical Americas are vulnerable to extreme weather events. Air temperatures in this region have shown a marked increase since the 1990s, and extreme weather events arising from climate change have increased. When comparing Hg fluxes to recent (1950-2016) climatic changes, results show marked increases in Hg fluxes to sediments during dry periods. The Standardized Precipitation-Evapotranspiration Index (SPEI) time series indicate a tendency toward more extreme drier conditions across the study region since the mid-1990s, suggesting that instabilities in catchment surfaces caused by climate change are responsible for the elevated Hg flux rates. Drier conditions since c. 2000 appear to be promoting Hg fluxes from catchments to lakes, a process that will likely be exacerbated under future climate-change scenarios.
date: 2023-02-21
date_type: published
publisher: American Chemical Society (ACS)
official_url: https://doi.org/10.1021/acs.est.2c09870
oa_status: green
full_text_type: pub
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 2007080
doi: 10.1021/acs.est.2c09870
medium: Print-Electronic
lyricists_name: Holmes, Jonathan
lyricists_name: Yang, Handong
lyricists_name: Rose, Neil
lyricists_id: JAHOL84
lyricists_id: HYANG48
lyricists_id: NLROS84
actors_name: Yang, Handong
actors_id: HYANG48
actors_role: owner
funding_acknowledgements: 218604 [Consejo Nacional de Ciencia y Tecnolog?a]; 218639 [Consejo Nacional de Ciencia y Tecnolog?a]; SCHW 671/16-1 [Deutsche Forschungsgemeinschaft]; [Florida Department of Environmental Protection]; [Osceola County Public Works]
full_text_status: public
publication: Environmental Science and Technology
event_location: United States
citation:        Yang, Handong;    Macario-González, Laura;    Cohuo, Sergio;    Whitmore, Thomas J;    Salgado, Jorge;    Peréz, Liseth;    Schwalb, Antje;                     ... O'Dea, Aaron; + view all <#>        Yang, Handong;  Macario-González, Laura;  Cohuo, Sergio;  Whitmore, Thomas J;  Salgado, Jorge;  Peréz, Liseth;  Schwalb, Antje;  Rose, Neil L;  Holmes, Jonathan;  Riedinger-Whitmore, Melanie A;  Hoelzmann, Philipp;  O'Dea, Aaron;   - view fewer <#>    (2023)    Mercury Pollution History in Tropical and Subtropical American Lakes: Multiple Impacts and the Possible Relationship with Climate Change.                   Environmental Science and Technology        10.1021/acs.est.2c09870 <https://doi.org/10.1021/acs.est.2c09870>.    (In press).    Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10165620/2/Yang_acs.est.2c09870.pdf