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Global POC assessment based on transmissometer data

Global POC assessment based on transmissometer data. Alexey Mishonov Wilford Gardner Mary Jo Richardson. Texas A&M University Department of Oceanography. WOCE. POC. JGOFS. Other. Global Transmissometer & POC Data Coverage.

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Global POC assessment based on transmissometer data

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  1. Global POC assessment based on transmissometer data Alexey Mishonov Wilford Gardner Mary Jo Richardson Texas A&M University Department of Oceanography

  2. WOCE POC JGOFS Other Global Transmissometer & POC Data Coverage SMP meeting, Woods Hole, July 2001

  3. Global Transmissometer database on the web: http://www-ocean.tamu.edu/~pdgroup/DataDir/SMP-data.html SMP meeting, Woods Hole, July 2001

  4. Beam C - POC relationship: Data Used • North Atlantic Bloom Experiment (NABE) Data • Sampling Period: Apr-May 1989 • 21 stations/casts • Sampling depth: from 2 to 3200 m • 165 data pairs • Bermuda Atlantic Time Series (BATS) Data • sampling period: 1990-1997 • 62 cruises/stations/casts • Sampling depth: from 0.6 to 1000 m • 608 data pairs Atlantic Ocean SMP meeting, Woods Hole, July 2001

  5. Beam Cp, m-1 Beam Cp, m-1 BATS: Beam Cp - POC relationship Winter Summer POC, mg m-3 Autumn Spring POC, mg m-3 Atlantic Ocean SMP meeting, Woods Hole, July 2001

  6. 773 data pairs 300 BATS NABE Regression 250 200 POC, mg m-3 150 100 POC=BeamCp*311.5547+0.299 50 R=0.941 0 0 0.2 0.4 0.6 0.8 1 Beam Cp, m-1 NABE & BATS: Beam Cp - POC relationship Atlantic Ocean SMP meeting, Woods Hole, July 2001

  7. 0 Hawaii Time Series data: 200 POC vs Beam Cp (n=476) 100 0-100m 100-300m >300m 400 90 80 70 600 60 POC, mg m-3 50 800 40 30 1000 20 10 1200 0 0 0.2 0.4 0.6 0.8 1 Beam Cp, m-1 Beam Cp - POC relationship: Data Used • Hawaii Ocean Time-series: 1991-1995 • 37 cruises / stations / casts • 487 data pairs • Depth: 2.5 - 1050m Pacific Ocean SMP meeting, Woods Hole, July 2001

  8. 0 200 Beam Cp vs POC 100 34.087x y = 7.0624e y = 545.64x + 5.667 90 2 2 R = 0.7352 R = 0.5618 80 70 400 POC, mg m-3 60 50 40 30 600 20 10 0 0 0.02 0.04 0.06 0.08 0.1 Beam Cp, m-1 Beam Cp - POC relationship: HOT Pacific Ocean SMP meeting, Woods Hole, July 2001

  9. S.A.V.E.: POC spatial distribution Atlantic Ocean SMP meeting, Woods Hole, July 2001

  10. CZCS Data from Beam C & CZCS chl: S.A.V.E. data Atlantic Ocean SMP meeting, Woods Hole, July 2001

  11. Density POC, mg/m3 calculated 40°N 35°N -75°W -70°W -65°W -75°W -70°W -65°W 0 20 40 60 80 100 120 140 160 23.4 23.8 24.2 24.6 25 25.4 25.8 26.2 Temperature Salinity 40°N 35°N 2 4 6 8 10 12 14 16 18 20 22 24 26 32 32.6 33.2 33.8 34.4 35 35.6 36.2 WBEX-1: POC spatial distributionApril-May, 1986: mixed layer average (upper 30 m) Atlantic Ocean SMP meeting, Woods Hole, July 2001

  12. 45°N POC, mg m-3 Density calculated 40°N 35°N -70°W -65°W -60°W -55°W -70°W -65°W -60°W -55°W 23.4 23.8 24.2 24.6 25 25.4 25.8 26.2 0 10 20 30 40 50 60 70 80 90 100 120 140 45°N Temperature Salinity 40°N 35°N 2 4 6 8 10 12 14 16 18 20 22 24 26 32 32.8 33.6 34.4 35.2 36 36.4 Oceanus-134: POC spatial distributionJune-July 1983: mixed layer average (upper 30 m) Atlantic Ocean SMP meeting, Woods Hole, July 2001

  13. WOCE POC JGOFS Other Global Transmissometer & POC Data Coverage SMP meeting, Woods Hole, July 2001

  14. FSU WOCE NABE BATS HOT JGOFS FSU Other Beam c & POC coverage + some FSU Beam c & POS data for Atlantic Beam C POC SMP meeting, Woods Hole, July 2001

  15. Thank You SMP meeting, Woods Hole, July 2001

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