PMID- 30821446
OWN - NLM
STAT- MEDLINE
DCOM- 20190917
LR  - 20190917
IS  - 1520-5851 (Electronic)
IS  - 0013-936X (Linking)
VI  - 53
IP  - 7
DP  - 2019 Apr 2
TI  - Characterization of Tibetan Soil As a Source or Sink of Atmospheric Persistent 
      Organic Pollutants: Seasonal Shift and Impact of Global Warming.
PG  - 3589-3598
LID - 10.1021/acs.est.9b00698 [doi]
AB  - Background soils are reservoirs of persistent organic pollutants (POPs). After 
      decades of reduced primary emissions, it is now possible that the POPs contained 
      in these reservoirs are being remobilized because of climate warming. However, a 
      comprehensive investigation into the remobilization of POPs from background soil 
      on the largest and highest plateau on Earth, the Tibetan Plateau (TP), is 
      lacking. In this study, a sampling campaign was carried out on the TP at three 
      background sites with different land cover types (forest, meadow and desert). 
      Field measurements of the air-soil exchange of POPs showed that previous 
      prediction using empirical models overestimated the values of the soil-air 
      partitioning coefficient ( K(SA)), especially for chemicals with K(OA) > 9. The 
      direction of exchange for gamma-HCH, HCB, and PCB-28 overlapped with the air-soil 
      equilibrium range, but with a tendency for volatilization. Their emission fluxes 
      were 720, 2935, and 538 pg m(-2) day(-1), respectively, and were similar in 
      extent to those observed for background Arctic soil in Norway. Nam Co and Ngari 
      are also permafrost regions, and most chemicals at these two sites exhibited 
      volatilization. This is the first result showing that permafrost can also emit 
      POPs. Seasonally, we found that chemicals tended to be re-emitted from soils to 
      the atmosphere in winter and deposited from the air to the soil in summer. This 
      finding is opposite to most previous results, possibly because of the higher 
      air-soil concentration gradient caused by the prevailing transport of POPs in 
      summer. Climate warming exerts a strong influence on air-soil exchange, with an 
      increase of 1  degrees C in ambient temperature likely leading to an increase of Tibetan 
      atmospheric inventories of POPs by 60-400%.
FAU - Ren, Jiao
AU  - Ren J
AD  - Key Laboratory of Tibetan Environment Changes and Land Surface Processes , 
      Institute of Tibetan Plateau Research, Chinese Academy of Sciences , Beijing , 
      100101 , China.
AD  - Research Institute of Transition of Resource-Based Economics , Shanxi University 
      of Finance and Economics , Taiyuan 030006 , Shanxi China.
FAU - Wang, Xiaoping
AU  - Wang X
AUID- ORCID: 0000-0001-7524-7540
AD  - Key Laboratory of Tibetan Environment Changes and Land Surface Processes , 
      Institute of Tibetan Plateau Research, Chinese Academy of Sciences , Beijing , 
      100101 , China.
AD  - CAS Center for Excellence in Tibetan Plateau Earth Sciences , Chinese Academy of 
      Sciences , Beijing , 100101 , China.
AD  - University of Chinese Academy of Sciences , Beijing 100049 , China.
FAU - Gong, Ping
AU  - Gong P
AUID- ORCID: 0000-0002-8766-260X
AD  - Key Laboratory of Tibetan Environment Changes and Land Surface Processes , 
      Institute of Tibetan Plateau Research, Chinese Academy of Sciences , Beijing , 
      100101 , China.
AD  - CAS Center for Excellence in Tibetan Plateau Earth Sciences , Chinese Academy of 
      Sciences , Beijing , 100101 , China.
FAU - Wang, Chuanfei
AU  - Wang C
AD  - Key Laboratory of Tibetan Environment Changes and Land Surface Processes , 
      Institute of Tibetan Plateau Research, Chinese Academy of Sciences , Beijing , 
      100101 , China.
AD  - CAS Center for Excellence in Tibetan Plateau Earth Sciences , Chinese Academy of 
      Sciences , Beijing , 100101 , China.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20190312
PL  - United States
TA  - Environ Sci Technol
JT  - Environmental science & technology
JID - 0213155
RN  - 0 (Air Pollutants)
RN  - 0 (Environmental Pollutants)
RN  - 0 (Soil)
RN  - 0 (Soil Pollutants)
RN  - DFC2HB4I0K (Polychlorinated Biphenyls)
SB  - IM
MH  - *Air Pollutants
MH  - Arctic Regions
MH  - Environmental Monitoring
MH  - *Environmental Pollutants
MH  - Global Warming
MH  - Norway
MH  - *Polychlorinated Biphenyls
MH  - Seasons
MH  - Soil
MH  - *Soil Pollutants
MH  - Tibet
EDAT- 2019/03/02 06:00
MHDA- 2019/09/19 06:00
CRDT- 2019/03/02 06:00
PHST- 2019/03/02 06:00 [pubmed]
PHST- 2019/09/19 06:00 [medline]
PHST- 2019/03/02 06:00 [entrez]
AID - 10.1021/acs.est.9b00698 [doi]
PST - ppublish
SO  - Environ Sci Technol. 2019 Apr 2;53(7):3589-3598. doi: 10.1021/acs.est.9b00698. 
      Epub 2019 Mar 12.