PMID- 20726587
OWN - NLM
STAT- MEDLINE
DCOM- 20101222
LR  - 20161125
IS  - 1520-5851 (Electronic)
IS  - 0013-936X (Linking)
VI  - 44
IP  - 18
DP  - 2010 Sep 15
TI  - Atlantic ocean surface waters buffer declining atmospheric concentrations of 
      persistent organic pollutants.
PG  - 6978-84
LID - 10.1021/es101293v [doi]
AB  - Decreasing environmental concentrations of some persistent organic pollutants 
      (POPs) have been observed at local or regional scales in continental areas after 
      the implementation of international measures to curb primary emissions. A decline 
      in primary atmospheric emissions can result in re-emissions of pollutants from 
      the environmental capacitors (or secondary sources) such as soils and oceans. 
      This may be part of the reason why concentrations of some POPs such as 
      polychlorinated biphenyls (PCBs) have not declined significantly in the open 
      oceanic areas, although re-emission of POPs from open ocean water has barely been 
      documented. In contrast, results from this study show that several 
      polychlorinated dibenzo-p-dioxins and furans (PCDD/Fs) have undergone a marked 
      decline (2-3 orders of magnitude for some homologues) over a major portion of the 
      remote oligotrophic Atlantic Ocean. The decline appears to be faster than that 
      observed over continental areas, implicating an important role of oceanic 
      geochemical controls on levels and cycling of some POPs. For several lower 
      chlorinated PCDD/Fs, we observed re-emission from surface water back to the 
      atmosphere. An assessment of the effectiveness of the main sink processes 
      highlights the role of degradation in surface waters as potentially key to 
      explaining the different behavior between PCDD/Fs and PCBs and controlling their 
      overall residence time in the ocean/atmosphere system. This study provides 
      experimental evidence that the ocean has a buffering capacity - dependent on 
      individual chemicals - which moderates the rate at which the system will respond 
      to an underlying change in continental emissions.
FAU - Nizzetto, Luca
AU  - Nizzetto L
AD  - Centre of Chemicals Management, Lancaster Environment Centre, Lancaster 
      University, Lancaster LA1 4YQ, UK.
FAU - Lohmann, Rainer
AU  - Lohmann R
FAU - Gioia, Rosalinda
AU  - Gioia R
FAU - Dachs, Jordi
AU  - Dachs J
FAU - Jones, Kevin C
AU  - Jones KC
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - United States
TA  - Environ Sci Technol
JT  - Environmental science & technology
JID - 0213155
RN  - 0 (Buffers)
RN  - 0 (Environmental Pollutants)
RN  - 0 (Furans)
RN  - 0 (Organic Chemicals)
RN  - 0 (Polychlorinated Dibenzodioxins)
SB  - IM
MH  - Air/analysis
MH  - Atlantic Ocean
MH  - Atmosphere/*chemistry
MH  - Buffers
MH  - Computer Simulation
MH  - Environmental Pollutants/*analysis
MH  - Furans/analysis
MH  - Internationality
MH  - Organic Chemicals/*analysis
MH  - Polychlorinated Dibenzodioxins/analogs & derivatives/analysis
MH  - Seawater/*chemistry
MH  - Surface Properties
EDAT- 2010/08/24 06:00
MHDA- 2010/12/24 06:00
CRDT- 2010/08/24 06:00
PHST- 2010/08/24 06:00 [entrez]
PHST- 2010/08/24 06:00 [pubmed]
PHST- 2010/12/24 06:00 [medline]
AID - 10.1021/es101293v [doi]
PST - ppublish
SO  - Environ Sci Technol. 2010 Sep 15;44(18):6978-84. doi: 10.1021/es101293v.