A5041341396- Oceanographic and Atmospheric Processes
- Marine and fisheries research
- Marine and coastal ecosystems
- Climate variability and models
- Tropical and Extratropical Cyclones Research
- Coastal and Marine Management
- Geology and Paleoclimatology Research
- Coastal and Marine Dynamics
- Fish Ecology and Management Studies
- Marine Bivalve and Aquaculture Studies
- Coral and Marine Ecosystems Studies
- Ocean Acidification Effects and Responses
- Ocean Waves and Remote Sensing
- Meteorological Phenomena and Simulations
- Marine and coastal plant biology
- Water Quality and Resources Studies
- Underwater Acoustics Research
- Atmospheric and Environmental Gas Dynamics
- Marine Biology and Ecology Research
- Food Industry and Aquatic Biology
- Hydrology and Sediment Transport Processes
- Isotope Analysis in Ecology
- Arctic and Antarctic ice dynamics
- Geological formations and processes
- Maritime and Coastal Archaeology
NOAA National Marine Fisheries Service
2004-2022
Office of Science
2016-2022
National Oceanic and Atmospheric Administration
2003-2020
NOAA National Marine Fisheries Service Southwest Fisheries Science Center
2002-2011
NOAA National Marine Fisheries Service Northeast Fisheries Science Center
2009
NOAA Pacific Marine Environmental Laboratory
1998-2005
University of Maine
2000
Pacific Environment
1997
Dalhousie University
1988-1992
NOAA National Marine Fisheries Service Pacific Islands Fisheries Science Center
1990
Climate change challenges organisms to adapt or move track changes in environments space and time. We used two measures of thermal shifts from analyses global temperatures over the past 50 years describe pace climate that species should track: velocity (geographic isotherms time) shift seasonal timing temperatures. Both are higher ocean than on land at some latitudes, despite slower warming. These indices give a complex mosaic predicted range phenology deviate simple poleward migration...
Following a strong El Niño, the climate of North Pacific underwent rapid and striking transition in late 1998. Upwelling‐favorable winds strengthened over California Current (CC), weakened Gulf Alaska (GOA). Coastal waters CC GOA cooled by several degrees, Decadal Oscillation (PDO) reversed sign remained negative through summer 2002. Zooplankton biomass northern doubled switched from warm to cold water species dominance, coho chinook salmon stocks rebounded, anchovy osmeriids increased....
Changes in the amplitude and phasing of seasonal events (phenology) can affect functioning marine ecosystems. Phenology plays a particularly critical role eastern boundary ecosystems, which are driven largely by cycle coastal upwelling. Here we develop describe set indicators that quantify timing, evolution, intensity, duration upwelling California Current large ecosystem (CCLME). There is significant interannual variability characteristics during 1967–2007, with extended periods high...
and NPGO) clarified their largescale regional-scale dynamics.This has brought improved understanding of the mechanisms large-scale Pacific climate variability regionalscale impacts on coastal ocean marine ecosystems.
The timing of the onset coastal upwelling in spring and its intensity over season are critical factors productivity structure California Current ecosystem (CCE). We use an index to characterize physical forcing latitudinal extent CCE, compare evolution 2005 with previous years. northern was delayed by 2–3 months. Upwelling stronger than normal latter part season, allowing cumulative reach climatological mean fall. Although conditions were unusual 2005, they not unprecedented historical...
State‐space statistical models are applied to long environmental time series of monthly northward wind stress, sea surface temperature (SST), salinity (SSS), and level (SL) from the west coast North America. The use a combination Kalman filtering maximum likelihood methods, which estimate nonlinear trend, nonstationary nondeterministic seasonal signal, an autoregressive term, effectively separate signals long‐term trends. examined for behavior consistent with increasing coastal upwelling...
Analysis of monthly coastal upwelling intensities revealed two seasonal and biologically relevant 'modes' in the California Current Ecosystem (CCE). The first mode reflected during summer months was characterized by low-frequency (multidecadal) processes, including significant (P<0.01) linear trends at some latitudes. In contrast, second wintertime defined higher-frequency variability associated with North Pacific High El Niño Southern Oscillation events. These modes were compared...
High‐resolution satellite measurements of ocean color and surface winds, along with historical in situ data, are used to explore interannual variability the annual migration transition zone chlorophyll front (TZCF) central North Pacific Ocean. Significant variations frontal position range were observed, including a significant southerly displacement during El Niño events. This displacement, apparently forced by enhanced convergence vertical mixing zone, creates vast regions anomalously high...
State‐space model decomposition of subsurface temperatures from the World Ocean Database is used to detect and characterize changes in thermal stratification upper 200 m California Current System (CCS) over period 1950–1993. Model results are analyzed at eight locations representing meridional offshore extent CCS between 31°N 40°N. Thermocline strength, depth, temperature derived mean‐level trend term seasonal component state‐space models. Over 44 years, mean level coastal thermocline...
The Integrated Ecosystem Assessment (IEA) approach was designed to assimilate scientific knowledge in the ideal format for providing advice inform marine Ecosystem-Based Management (EBM). As such, IEAs were envisioned as cornerstone integrated science product US National Oceanic and Atmospheric Administration (NOAA) that would maximize efficiencies synergies across agency’s ecosystem efforts. This led development of a NOAA IEA Program oversee regional implementation national framework....
A scanning algorithm based on the classical Student t ‐test is extended to detecting presence and coherency of multiscale abrupt changes in two time series. It functions similarly Haar wavelet transform, but also provides thresholds statistical significance for testing change‐points. The applied historic series (AD 622–1469) maximum minimum flood levels Nile River using “Table‐Look‐Up Test” correction dependence results reveal several changes, separate wet/dry episodes 30–160 year...