Environmental Factors Associated with Long-Term Changes in Chlorophyll Concentration in the Sacramento-San Joaquin Delta and Suisun Bay, California

Long-term changes in chlorophyll concentrations were predicted from environmental variables using Box-Jenkins transfer function models for the Sacramento and San Joaquin rivers and Suisun Bay. Data used for the analyses were collected continuously on a semimonthly or monthly basis over the 17-yr per...

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Bibliographic Details
Published in:Estuaries 1992-09, Vol.15 (3), p.335-348
Main Author: Lehman, Peggy W.
Format: Article
Language:English
Subjects:
AIR
AQUATIC ORGANISMS
BASIC BIOLOGICAL SCIENCES
BAYS
BIOMASS
Brackish
CALIFORNIA
CARBOXYLIC ACIDS
CHLOROPHYLL
Chlorophylls
Coastal oceanography, estuaries. Regional oceanography
COASTAL WATERS
DEVELOPED COUNTRIES
Earth, ocean, space
ECOLOGICAL CONCENTRATION
ENERGY SOURCES
ENVIRONMENTAL EFFECTS
Estuaries
Exact sciences and technology
External geophysics
FLUIDS
GASES
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
HYDROGEN COMPOUNDS
Marine
Modeling
MONITORING
NORTH AMERICA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
Physics of the oceans
PHYTOCHROMES
PHYTOPLANKTON
PIGMENTS
PLANKTON
PLANTS
PORPHYRINS
PRODUCTION
PROTEINS
RENEWABLE ENERGY SOURCES
River deltas
River water
RIVERS
SOUTHERN OSCILLATION
STREAMS
SURFACE WATERS
TEMPERATURE MONITORING
Time series models
Transfer functions
TURBIDITY
USA 550200 > Biochemistry
VARIATIONS
WATER
Water temperature
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Description
Summary:Long-term changes in chlorophyll concentrations were predicted from environmental variables using Box-Jenkins transfer function models for the Sacramento and San Joaquin rivers and Suisun Bay. Data used for the analyses were collected continuously on a semimonthly or monthly basis over the 17-yr period between 1971 and 1987. Groups of highly correlated environmental variables were summarized along three environmental axes using principal component analysis. The first environmental axis summarized river flow and specific conductance. The second environmental axis summarized water transparency and the third environmental axis summarized air and water temperature. Chlorophyll concentration was significantly cross-correlated with environmental axes and individual environmental variables. Transfer function models developed to describe changes in chlorophyll concentration over time were characterized by lag responses and described between 41% and 51% of the data variation. Significant cross-correlations between environmental axes and the California climate index (CA SLP) were used to develop a conceptual model of the link between regional climate and estuarine production.
ISSN:0160-8347
1559-2758
DOI:10.2307/1352781