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By National Research Council [U.S.]. Panel on Mercury

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Extra info for An Assessment of Mercury in the Environm

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Monitoring programmes in participating countries contribute data to GEMS/Water for >800 stations worldwide (Fig. 1). The number of stations for which GEMS/Water has data continues to increase and new data received are processed into the database regularly. In this way, GEMS/Water maintains a living database that is continuously updated. While the station compliment addresses the three main target sectors for freshwater resources of rivers, lakes (including reservoirs) and groundwater, unfortunately GEMS/Water does not have data for wetlands, which play important roles in the ecology and hydrological cycles of many countries.

Vincent 50 North o 2 1 3 4 5 7 6 ~ ~ ~ 5 --.. c c. -. -C South as ... - 0 c( 1 ~ 0 2 0:: D.. ». >X ». 2 )< L- 3 )< 4 o ~ L-... :::>~I Fig. S. 1% PAR (400-700 run) irradiance depth for the littoral and pelagic zones in the North and South Basins of Lake Biwa. Hatched areas refer to the pelagic zones of each basin. ---- ' - - - - - . -- - - - - r - - - - - ' - Pelagic Littoral 4 70 Fig. 6. 1% UVR depth penetration in the whole water column expressed as the percentage of the whole water column for the littoral and pelagic zones in the North and South Basins of Lake Biwa.

1% UVR depth penetration in the whole water column expressed as the percentage of the whole water column for the littoral and pelagic zones in the North and South Basins of Lake Biwa. Hatched areas refer to the pelagic zones of each basin. -J. Frenette and W. F. 80 ~ .. ~ r-"' ~"'. ~. , ~ I' I' ~ f~~' ~~ It: ;;'t I', ~ :,. ~ .. ,. ;; t~1 ~;j p to' ;\ ~ ;~ 1( 7 11 ~:- ~;. 0 North Fig. 7. J340 and Kd313 are the attenuation coefficients at 340 and 313 nm of the whole water column for the littoral and pelagic zones in the North and South Basins of Lake Biwa.

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