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Coupling of Equatorial Pacific Conditions with Southeast U.S. River Discharge

Coupling of Equatorial Pacific Conditions with Southeast U.S. River Discharge. Lawrence B. Cahoon Dept. of Biology and Marine Biology UNC Wilmington. Correlations – Climate Indices.

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Coupling of Equatorial Pacific Conditions with Southeast U.S. River Discharge

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  1. Coupling of Equatorial Pacific Conditions with Southeast U.S. River Discharge Lawrence B. Cahoon Dept. of Biology and Marine Biology UNC Wilmington

  2. Correlations – Climate Indices Coefficients (r2) from least-squares linear regressions of river discharges (USGS data) vs. “major” NH climate indices; * = r2< 0.01. ________________________________________________ “Major” NH Indices River PDO NAO AMO James * * * Cape Fear * * * Savannah * * 0.017 _________________________________________

  3. Correlations – ENSO Indices Coefficients (r2) from least-squares linear regressions of river discharges (USGS data) vs. ENSO indices; * = r2 < 0.01. _______________________________________________________________ ENSO Indices River SOI BEST MEI James * * 0.02 Cape Fear * * * Savannah 0.02 0.02 0.02 _______________________________________________________________

  4. Correlations – ENSO SSTs Coefficients (r2) from least-squares linear regressions of river discharges (USGS data) vs. ENSO SST data; * = r2< 0.01. ______________________________________________________________________ Niño regions River 1+2 3 4 3.4 _________________________________ James 0.27 0.17 * 0.04 Cape Fear 0.16 0.07 * * Savannah 0.16 0.10 * 0.03 ________________________________________

  5. James River (36.9o-37.4oN, 75.8o-76.4oW) (1997-2008) [Chla] v. Flow, r2 = 0.29 DAC@490 v. Flow, r2 = 0.32 WLI@670, r2 = 0.25

  6. Cape Fear River (33.5o-34o N, 78o-78.5o W) (1997-2009) [Chla] v. Flow, r2 = 0.50 DAC@490 v. Flow, r2=0.39 WLI@670, r2 = 0.40

  7. Savannah River (1997-2008)_ (31.5o-32.3oN, 80.3o-81oW) [Chla] v. Flow, r2 = 0.42 DAC@490 v. Flow, r2 = 0.43 WLI@670 v. Flow, r2 = 0.09

  8. Hypothesis/question: • SEUS coastal ocean is coupled with ENSO; can we make useful forecasts?

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