Program and Agenda

Abstract

LOCAL TO BASIN SCALE MODULATION OF PRIMARY PRODUCTIVITY IN THE NORTH PACIFIC SUBTROPICAL GYRE: LESSONS LEARNED FROM THE HAWAII OCEAN TIME-SERIES PROGRAM

Over the past decades it has become evident that many regional changes in marine ecosystem dynamics are coincident with observed perturbations in remote regions and may be modulated by large-scale circulation. The North Pacific subtropical gyre (NPSG), once considered one of the largest, most remote, and stable oligotrophic habitats, is no exception. Based on extensive studies supported by the Hawaii Ocean Time-series (HOT) program, our scientific community has been able to characterize the temporal variability in ecosystem structure and biogeochemical cycles in the NPSG, ranging from episodic events to inter-annual and long-term changes. Using carbon assimilation rates, as derived from 14C in situ incubations, as well as pigment analyses, bio-optical and remote sensing measurements, we analyze to what extent the observed scales of variability in primary productivity and phytoplankton ecosystem structure can be explained by local, regional and large scale modulations. Although seasonal to inter-annual patterns of variability can be associated with regional and basin-scale forcing, the day- to-day variability in this oligotrophic environment remains difficult to explain.

ePoster: http://http://hahana.soest.hawaii.edu/hot/

Authors

Letelier, R. M., Oregon State University, USA, letelier@coas.oregonstate.edu

White, A. E., Oregon State University, USA, awhite@coas.oregonstate.edu

Church, M. J., University of Hawaii, USA, mjchurch@hawaii.edu

Karl, D. M., University of Hawaii, USA, dkarl@hawaii.edu

Bidigare, R. R., University of Hawaii, USA, bidigare@hawaii.edu

Details

Poster presentation

Session #:049
Date: 2/27/2014
Time: 16:00 - 18:00
Location: Poster/Exhibit Hall

Presentation is given by student: No

PosterID: 2442