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Barnes August 2007 - Who

16 – 23 Aug1. Jim Postel, marine technician (UW)2. Lydie Herfort, chief scientist (OHSU)3. Mike Malpezzi (UMCES)4. Tiffany Gregg (OSU)

5. Bill Howe (OHSU)6. Suzanna Brauer (OHSU)

23 – 30 Aug1. Jim Postel, marine technician (UW)2. Lydie Herfort, chief scientist (OHSU)3. Mike Malpezzi (UMCES)4. Tiffany Gregg (OSU)

5. Dan Murphy (OHSU)6. Karen Wegner (OSHU)

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Tiffany Gregg / Fred Prahl Transport of polycyclic hydrocarbons (PAHs) with suspended particulate matter from the Columbia River to its estuary(River & ETM)

Lydie Herfort / Dan Murphy / Bill Howe / Mike Malpezzi / Karen Wegner/ Peter Zuber / Byron Crump/ Holly SimonMicrobial community structure & gene expression, environmental variables(River, ETM, limit salinity intrusion)

Suzanna Brauer / Brad TeboCharacterising rates of Mn oxidation using 54-Mn & 14C-bicarbonate uptake(ETM)

Samplingwater air pump (70L)sediment Shipeck grab

Barnes August 2007 - What

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Plan for Barnes: where

River

ETMNeap tide

Limit salinity intrusion

ETMSpring tide

Plan for Barnes

Aug-14 Travelling from Seattle To AstoriaAug-15 Travelling from Seattle To AstoriaAug-16 Loading in AstoriaAug-17 Columbia River Estuary sampling

Sailing to PortlandAug-18 Sampling in Columbia and WillametteAug-19 Columbia River (Beaver Army Dock)Aug-20 South Chanel ETMAug-21 North Chanel ETMAug-22 Mouth ETMAug-23 South Chanel ETMAug-24 North Chanel ETMAug-25 Estuary (limit of salinity intrusion)Aug-26 Estuary (limit of salinity intrusion)Aug-27 South Chanel ETMAug-28 Mouth ETMAug-29 North Chanel ETMAug-30 Unloading in Astoria

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Beaver Dock

Columbia

Willamette

Confluent Willamette & Columbia

Locations of river end-member

St Helen

0 PSU

0 / 7 PSU0 / 20 PSU

Aim: good river-end member

Sampling surface & bottom water in estuary and surface in river

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Tide in Astoria (17-29 Aug) and ETM sampling days

Neap tide Spring tide

S M N S N S M N

S = South ChannelM = Mouth ChannelN = North Channel = ETM sampling day

Sampling surface & bottom water

Aim: 1. Role of the ETM as a trap for PAHs2. Discriminate particle-attached and free-living

microbial communities and gene expression3. Rate of Mn oxydation

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Tide and limit of salinity intrusion sampling days

S = South ChannelN = North Channel = sampling day

Sampling surface water

Aim: 1. Determine diffusion of microbial populations

at the limit of salinity intrusion (0-5 PSU)

N S

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Tides & day/night