Temperature anomaly o C Ice concentration. Impacts of Climate Variations on the Bering Sea Ecosystem Overarching theme: Describing the state of the Bering.

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Presentation transcript:

Temperature anomaly o C Ice concentration

Impacts of Climate Variations on the Bering Sea Ecosystem Overarching theme: Describing the state of the Bering Sea, and using this information for inter-disciplinary and multi-institution studies

Temperature and fluorescence at Sites 2 (left) and 4 (right)

Depth-Averaged Temperature in the SE Bering Sea

Vertically Averaged Temperature (°C) at Site 2

Grey - Lowest 1/3 Pink - Middle 1/3 Red - Highest 1/ Bering Sea Climate Indices

Bering Sea Pollock

Pollock and Bottom Temperature Relative CPUE 170 o W o W 60 o N 58 o N 60 o N 58 o N J Ianelli

Hunt et al., 2002 Oscillating Control Hypothesis

Pollock Recruitment with Summer Wind Mixing & Winter Surface Temperature

Produced from NOAA/PMEL’s Bering Sea Climate Theme Page

St. Paul St. George Northern fur seal pups born on Pribilof Islands Error bars are 95% confidence intervals

[M. Webber-USFWS] Walrus herd in the Chukchi Sea– June 2002 Schematic of food web in the northern Bering and Chukchi Seas [Grebmeier and Dunton 2000] Clam food in walrus stomachs [photos courtesy G. Sheffield]

850 mb Temperature: 1-January-1975 Bering Sea Arctic North Pacific Bering Climate Cold/Dry Arctic Air vs. Warm/Moist Pacific Air

Mooring Sites 4 2 5

Final Remarks Present - Can often go beyond exploratory correlative analysis to scenario testing based on induction. Near Future - Continue monitoring and process studies to refine quantitative understanding of mechanisms.