PMID- 37277035
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20230627
LR  - 20230627
IS  - 1879-1026 (Electronic)
IS  - 0048-9697 (Linking)
VI  - 891
DP  - 2023 Sep 15
TI  - Sedimentary records of persistent organic pollutants (OCPs and PCBs) in Ngoring 
      Lake, the central Tibetan Plateau, China: Impacts of westerly atmospheric 
      transport and cryospheric melting.
PG  - 164655
LID - S0048-9697(23)03278-3 [pii]
LID - 10.1016/j.scitotenv.2023.164655 [doi]
AB  - Lake sediments in remote alpine regions are used to infer information on 
      persistent organic pollutants (POPs) delivery via long-range atmospheric 
      transport (LRAT) with limited influences from local sources. When studying the 
      deposition history of POPs on the Tibetan Plateau, regions influenced by westerly 
      air mass flow have received insufficient attention compared with regions governed 
      by the monsoon. Herein, we collected and dated two sediment cores from Ngoring 
      Lake to reconstruct the depositional time trends of 24 organochlorine pesticides 
      (OCPs) and 40 polychlorinated biphenyls (PCBs) and assess the response to 
      emission reductions and climate change. DDTs, HCHs, hexachlorobenzene (HCB), and 
      PCBs were all detected in the sediment core at low concentrations of 110-600, 
      4.3-400, 8.1-60, and 3.3-71 pg/g, respectively. The composition of PCBs, DDTs, 
      and HCHs was dominated by congeners with 3 and 4 chlorines (avg. 70 %), p,p'-DDT 
      (avg. 90 %), and beta-HCH (avg. 70 %), respectively, indicating the influence of 
      LRAT and the contribution of technical DDT and technical HCH from potential 
      source regions. Temporal trends of PCB concentrations normalized by total organic 
      carbon echoed the peak of global emissions of PCBs around 1970. The rising trend 
      of concentrations of beta-HCH and DDTs after the 1960s in sediments was mainly 
      explained by the input of contaminants with melting ice and snow from a 
      cryosphere shrinking under global warming. This study verifies that westerly air 
      mass flow brings fewer contaminants to the lacustrine environment on the Tibetan 
      Plateau than the monsoon and demonstrates the impacts of climate change on the 
      secondary emission of POPs from the cryosphere to the sediments.
CI  - Copyright (c) 2023 Elsevier B.V. All rights reserved.
FAU - Ding, Yang
AU  - Ding Y
AD  - Key Laboratory of Land Resources Evaluation and Monitoring in Southwest, Ministry 
      of Education, Sichuan Normal University, Chengdu 610066, China; State Key 
      Laboratory of Biogeology and Environmental Geology, China University of 
      Geosciences, Wuhan 430078, China. Electronic address: cugdingyang@163.com.
FAU - Qi, Shihua
AU  - Qi S
AD  - State Key Laboratory of Biogeology and Environmental Geology, China University of 
      Geosciences, Wuhan 430078, China; School of Environmental Studies, China 
      University of Geosciences, Wuhan 430078, China. Electronic address: 
      shihuaqi@cug.edu.cn.
FAU - Huang, Huanfang
AU  - Huang H
AD  - State Environmental Protection Key Laboratory of Water Environmental Simulation 
      and Pollution Control, South China Institute of Environmental Sciences, Ministry 
      of Ecology and Environment, Guangzhou 510530, China.
FAU - Zhang, Yuan
AU  - Zhang Y
AD  - State Key Laboratory of Biogeology and Environmental Geology, China University of 
      Geosciences, Wuhan 430078, China.
FAU - Zheng, Huang
AU  - Zheng H
AD  - School of Environmental Studies, China University of Geosciences, Wuhan 430078, 
      China.
FAU - Qin, Yun
AU  - Qin Y
AD  - National Climate Center, China Meteorological Administration, Beijing 100081, 
      China.
FAU - Bao, Qian
AU  - Bao Q
AD  - Key Laboratory of Land Resources Evaluation and Monitoring in Southwest, Ministry 
      of Education, Sichuan Normal University, Chengdu 610066, China.
FAU - Chen, Wei
AU  - Chen W
AD  - School of Environmental Studies, China University of Geosciences, Wuhan 430078, 
      China.
FAU - Qu, Chengkai
AU  - Qu C
AD  - State Key Laboratory of Biogeology and Environmental Geology, China University of 
      Geosciences, Wuhan 430078, China.
LA  - eng
PT  - Journal Article
DEP - 20230604
PL  - Netherlands
TA  - Sci Total Environ
JT  - The Science of the total environment
JID - 0330500
SB  - IM
OTO - NOTNLM
OT  - Climate change
OT  - Global warming
OT  - Long-range atmospheric transport (LRAT)
OT  - Persistent organic pollutants (POPs)
OT  - Secondary source
OT  - The westerlies
COIS- Declaration of competing interest The authors declare that they have no known 
      competing financial interests or personal relationships that could have appeared 
      to influence the work reported in this paper.
EDAT- 2023/06/06 01:11
MHDA- 2023/06/06 01:12
CRDT- 2023/06/05 19:23
PHST- 2023/02/22 00:00 [received]
PHST- 2023/05/22 00:00 [revised]
PHST- 2023/06/01 00:00 [accepted]
PHST- 2023/06/06 01:12 [medline]
PHST- 2023/06/06 01:11 [pubmed]
PHST- 2023/06/05 19:23 [entrez]
AID - S0048-9697(23)03278-3 [pii]
AID - 10.1016/j.scitotenv.2023.164655 [doi]
PST - ppublish
SO  - Sci Total Environ. 2023 Sep 15;891:164655. doi: 10.1016/j.scitotenv.2023.164655. 
      Epub 2023 Jun 4.