Oceanic-Atmospheric Modes of Variability and Their Effects on River Flow in the North Central Gulf of Mexico

Author(s): Sanchez-Rubio, G. ;  Perry, H.;  Biesio, P.

The present study examined the individual and combined influences of four oceanic-atmospheric modes of variability on Mississippi River and Pascagoula River flows. Mississippi River and Pascagoula River mean flows, within long-term climatic phases, were compared using a parametric t-test. While the combination of Pacific Decadal Oscillation (PDO), Atlantic Multidecadal Oscillation (AMO), and North Atlantic Oscillation (NAO) phases determined long-term Mississippi River regimes, the coupling of AMO and NAO phases determined long-lasting Pascagoula River flow regimes. Mississippi River mean flow was higher during the PDO warm (PDOw), AMO cold (AMOc), and NAO positive (NAOp) phases than during the PDO cold (PDOc), AMO warm (AMOw), and NAO negative (NAOn) phases. Pascagoula River mean flow was higher during AMOc and NAOp phases than during AMOw and NAOn phases. During a long-term drought regime in the Pascagoula River basin, interannual fluctuations in the Pascagoula River flow were associated with the El Niñ o Southern Oscillation (ENSO) events. During the AMOw/NAOn phase, Pascagoula River flow showed a significantly steady reduction from ENSO warm to ENSO neutral to ENSO cold events. In the northcentral Gulf of Mexico, more than 90% of the freshwater is discharged by the highly correlated Mississippi, Atchafalaya, Pascagoula, and Pearl Rivers. Climate-related hydrological regimes have been associated with fisheries resources availability and the economic and social wealth of coastal communities.


Technical Presentations

  • Delta Water Quality
  • Delta Water and Agriculture
  • Wetlands
  • Water Quality
  • Sediments
  • Non-Point
  • Management and Sustainability
  • Wood Treatment
  • Modeling
  • Soil and Water Treatment


Responsible Site Design: Implementing Innovative Stormwater Management Strategies

The primary goal of the workshop is to create a dynamic learning experience that examines the role of stormwater management in the built environment. The workshop will focus on integrating ecologically sound water management approaches into site design. After the workshop, attendees will be familiar with the following concepts and technical issues:

  • Knowledge of the stormwater treatment chain
  • Knowledge of the impact of land use codes on stormwater management
  • Application of a design process that mitigates the effects of stormwater on-site
  • Knowledge of the relationship between land use codes and design for innovative stormwater management


For information contact:
Jessie Schmidt
Box 9680
Mississippi State, MS 39762