The Strange Summer of 2005 from a Nearshore Perspective Jack Barth 1, Francis Chan 1, Patrick Drake 2, Chris Gotschalk 3, Anthony Kirincich 1, Jane Lubchenco.

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Presentation transcript:

The Strange Summer of 2005 from a Nearshore Perspective Jack Barth 1, Francis Chan 1, Patrick Drake 2, Chris Gotschalk 3, Anthony Kirincich 1, Jane Lubchenco 1, Bruce Menge 1, Margaret McManus 4,2, Libe Washburn 3 1 Oregon State University 2 University of California Santa Cruz 3 University of California Santa Barbara 4 University of Hawaii PISCO

Spring transition Fall transition Interannual variability in wind stress Cumulative wind stress since Spring Transition Equatorward, Upwelling favorable Barth/Pierce (OSU)

2000 Barth et al. (2005)

2005 Barth/Pierce (OSU)

Spring transition Interannual variability in wind stress Cumulative wind stress since Spring Transition Equatorward, Upwelling favorable Barth/Pierce (OSU) Fall transition

Annual cycle of northward wind stress (monthly means ) at Tatoosh, Newport, Monterey and Pt. Conception Barth/Pierce (OSU)

48.4N 44.6N 37.4N 34.3N

PISCO HSU

Barth/Kirincich (PISCO-OSU)

PISCO

Fig 1 Chlorophyll just off the shore Chan/Nielsen (PISCO-OSU) 2005

Fig 2 Chan/Nielsen (PISCO-OSU) Chlorophyll anomaly 2005

Fig 3 Chan (PISCO-OSU) Chlorophyll time series 2005

Fig 4 Chan/Nielsen (PISCO-OSU) nitrate+nitrite just off the shore 2005

Fig 5 Chan/Nielsen (PISCO-OSU) nitrate+nitrite anomalies 2005

N+N (  M) Fig 6 Chan (PISCO-OSU) N+N time series 2005

Phytoplankton assemblage shift: Five weeks of sampling in Monterey Bay revealed differences in the types of phytoplankton inhabiting the bay; dinoflagellates were dominant in 2005, while diatoms were dominant in a similar study in (M. McManus) Zooplankton: M. McManus and Van Holliday are working on acoustic data (TAPS) from Monterey Bay. “Five weeks of sampling in Monterey Bay during summer 2005 showed significantly lower zooplankton biomass compared to 2002.”

Boiler Bay Strawberry Hill Cape Meares Fogarty Creek Yachats Beach Seal Rock Cape Arago Tokatee Klootchman Cape Blanco, Rocky Point Timeline: initiation of mussel and barnacle recruitment sampling Menge/Lubchenco (PISCO-OSU)

North South Menge/Lubchenco (PISCO-OSU) mussels 2005

Menge/Lubchenco (PISCO-OSU)

North South Menge/Lubchenco (PISCO-OSU) barnacles 2005

Menge/Lubchenco (PISCO-OSU)

Larval Fish (subtidal monitoring) In the Santa Cruz region, nearshore monitoring of rockfish recruitment showed a failure of recruitment of OYB complex (blue, black, boccacio, widow, olive, yellow). This information compliments offshore trawl surveys by NOAA which likewise showed extremely low numbers of larval rockfish. The later-season recruiting KGB complex (Kelp, Gopher, and Black-and-Yellow rockfish) were observed, suggesting that the impact from the warm water event was not cross-cutting across all rockfish species. (M. Carr, UCSC) In Santa Barbara region, there was likewise a failure of recruitment by the OYB complex- however, in contrast to the Santa Cruz area, NOAA surveys indeed found larval rockfish offshore. This may mean that offshore abundances are not being translated to inshore kelp forests. ( J. Caselle, UCSB)

To Do: finish assembling nearshore time series through fall 2005 (OCNMS, HSU, others?) quantify phytoplankton assemblage and zooplankton abundance estimates from Monterey Bay quantify PISCO measurements of larval fish recruitment

EXTRAS

NH Line NH-20 Barth/Shearman/Erofeev (OSU) Kosro (OSU) Glider observations August 2005

Glider observations August 2005 Barth/Shearman/Erofeev (OSU) T (°C) S density (kg/m 3) depth (m) cross-shelf distance (km) 020

Time series from Santa Cruz Wharf NEOCO station

Warm temperatures off central Oregon Late spring transition to upwelling OSU PISCO Barth/Pierce (OSU)

Barth/Shearman/Erofeev (OSU) Glider observations August 2005 T (°C) S Density (kg/m 3)