temperature anomaly o c
DESCRIPTION
Ice concentration. Temperature anomaly o C. 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 - PowerPoint PPT PresentationTRANSCRIPT
Temperature anomaly oC 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 1/3
1965 1975 1985 1995
Bering SeaClimate Indices
Bering Sea Pollock
Pollock and Bottom Temperature
00 0
2
2
4
0.0 0.25 0.50 0.75 1.0Relative CPUE
170oW 170 165 160oW
60oN
58oN
60oN
58oN
J Ianelli
Hunt et al., 2002
Oscillating Control Hypothesis
Pollock Recruitment withSummer Wind Mixing & Winter Surface
Temperature1978 19961982 1989
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
http://nmml.afsc.noaa.gov/alaskaecosystems/nfshome/survey2004pribpups.htm
[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
NorthPacific
Bering Climate
Cold/Dry Arctic Air vs. Warm/Moist Pacific Air
Mooring Sites
42
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.