Anomalous hydrologic and biogeochemical conditions in the ......Anomalous hydrologic and...
Transcript of Anomalous hydrologic and biogeochemical conditions in the ......Anomalous hydrologic and...
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Anomalous hydrologic and biogeochemical conditions in the
Columbia River Estuary during 2014-2015
Joe Needoba, Tawnya Peterson, Charles Seaton, Sarah F. Riseman, and António M. Baptista
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How did the Blob influence the CRE? August 2014 October 2014
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In 2015 the estuary was also influenced by warm river conditions
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For the CRE, how does 2014-2015 compare to previous “anomalous” warm years?
• 1997 Strong El Niño - warm ocean
• 2001 Low snowpack - warm river
• 2005 Delayed upwelling - warm ocean
• 2014-2015 The Blob - warm ocean and river
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Data sets Temp and River Flow Data Sets
CORIE/CMOP 1996 -2016
USGS NASQAN/NAWQA 1991-2003 (temp)
1992-2015 (flow)
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Measuring ocean water in the estuary
Temperature corresponding to daily highest salinity measurement – 1996-2015
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River Flow and Temperature 1992-2015
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1997 Strong El Niño - warm ocean
NCDC SST http://nvs.nanoos.org/Climatology
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1997 Strong El Niño - warm ocean
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1997 Strong El Niño - warm ocean
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http://www.wcc.nrcs.usda.gov/ftpref/support/snow/snowpack_maps/columbia_river/wy2001/cusn0105.gif
2001 Low snowpack - warm river
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2001 Low snowpack - warm river
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2001 Low snowpack - warm river
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2005 Delayed upwelling - warm ocean
May 2005 August 2005
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2005 Delayed upwelling - warm ocean
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2005 Delayed upwelling - warm ocean
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2014-2015 The Blob - warm ocean and river
October 2014
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2014-2015 The Blob - warm ocean and river
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2014-2015 The Blob - warm ocean and river
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2014-2015 The Blob - warm ocean and river
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2014-2015 The Blob - warm ocean and river
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Summary of Estuary Conditions
Year Event Ocean end member River end member
1997 El Nino Warm Cold
2001 Small snowpack Cold Average
2005 Delayed upwelling Warm Average
2014 Upwelling - blob Cold - Warm Average
2015 Blob + small snowpack + unusual warm weather in spring
Warm Warm
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CMOP Biogeochemical Data
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2014
2015
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O
2 %
Sat
Salin
ity
SATURN-03 Dissolved Oxygen Time Series
2012 2013 2014 2015
No evidence for strong hypoxia formation associated with the blob
13 m dissolved oxygen – Saturn 03
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Remnants of persistent bloom of Pseudo-nitzschia spp. in NE Pacific were see in the CR estuary
Estuary sample (surface, SAT-03) Offshore sample (surface, CR-40)
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Biogeochemical consequences of warm waters in the Columbia River (ongoing research)
No significant hypoxia detected in estuary Summer-Fall: Nutrient supply depends on strength of upwelling HAB blooms widespread in river and ocean end-members