Search
Results
-
Global marine plankton functional typebiomass distributions: coccolithophores
(2012)Earth System Science Data DiscussionsCoccolithophores are calcifying marine phytoplankton of the class Prymnesiophyceae. They are considered to play an import role in the global carbon cycle through the production and export of organic carbon and calcite. We have compiled observations of global coccolithophore abundance from several existing databases as well as individual contributions of published and unpublished datasets. We make conservative estimates of carbon biomass ...Working Paper -
The MAREDAT global database of high performance liquid chromatography marine pigment measurements
(2012)Earth System Science Data DiscussionsA global pigment database consisting of 37103 pigment suites measured by high performance liquid chromatography was assembled in support of theMARineEcosytemDATa (MAREDAT) initiative. These data originate from 136 field surveys within theglobal ocean, were solicited from investigators and databases, compiled, and then quality controlled. Nearly one quarter of the data originates from the Laboratoired’Océanographie de Villefranche (LOV), ...Working Paper -
Spatiotemporal variability and long-term trends of ocean acidification in the California Current System
(2012)Biogeosciences DiscussionsDue to seasonal upwelling, the upper ocean waters of the California Current System (CCS) have a naturally low pH and aragonite saturation state (Ωarag), making this region particularly prone to the effects of ocean acidification. Here, we use the Regional Oceanic Modeling System (ROMS) to conduct preindustrial and transient (1995–2050) simulations of ocean biogeochemistry in the CCS. The transient simulations were forced with increasing ...Working Paper -
Projected decreases in future marine export production: The role of carbon fluxes through the upper ocean ecosystem
(2015)Biogeosciences DiscussionsAccurate projections of marine particle export production (EP) are crucial for predicting the response of the marine carbon cycle to climate change, yet models show a wide range in both global EP and their responses to climate change. This is, in part, due to EP being the net result of a series of processes, starting with net primary production (NPP) in the sunlit upper ocean, followed by the formation of particulate organic matter and ...Working Paper -
Role of zooplankton dynamics for Southern Ocean phytoplankton biomass and global biogeochemical cycles
(2015)Biogeosciences DiscussionsGlobal ocean biogeochemistry models currently employed in climate change projections use highly simplified representations of pelagic food webs. These food webs do not necessarily include critical pathways by which ecosystems interact with ocean biogeochemistry and climate. Here we present a global biogeochemical model which incorporates ecosystem dynamics based on the representation of ten plankton functional types (PFTs): six types of ...Working Paper -
The distribution, dominance patterns and ecological niches of plankton functional types in Dynamic Green Ocean Models and satellite estimates
(2013)Biogeosciences DiscussionsWe compare the spatial and temporal representation of phytoplankton functional types (pPFTs) in four different Dynamic Green Ocean Models (DGOMs; CCSM-BEC, NEMURO, PISCES and PlankTOM5) to derived phytoplankton distributions from two independent satellite estimates, with a particular focus on diatom distributions. Global annual mean surface biomass estimates for diatoms vary between 0.23 mmol C m−3 and 0.77 mmol C m−3 in the models, and ...Working Paper -
MAREDAT: towards a world atlas of MARine Ecosystem DATa
(2012)Earth System Science Data DiscussionsWe present a summary of biomass data for 11 Plankton Functional Types (PFTs)plus phytoplankton pigment data, compiled as part of the MARine Ecosystem biomassDATa (MAREDAT) initiative. The goal of the MAREDAT initiative is to provide global gridded data products with coverage of all biological components of the global ocean ecosystem. This special issue is the first step towards achieving this. The PFTs presented here include picophytoplankton, ...Working Paper