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Jasmin G. John
Geophysical Fluid Dynamics Laboratory
26Publications
17H-index
5,402Citations
Publications 26
Newest
Climate change is expected to modify ecological responses in the ocean, with the potential for important effects on the ecosystem services provided to humankind. Here we address the question of how rapidly multiple drivers of marine ecosystem change develop in the future ocean. By analysing an ensemble of models we find that, within the next 15 years, the climate change-driven trends in multiple ecosystem drivers emerge from the background of natural variability in 55% of the ocean and propagate...
#1James C. OrrH-Index: 37
#2Raymond G. NajjarH-Index: 34
Last.Heather Graven (Imperial College London)H-Index: 18
view all 24 authors...
The Ocean Model Intercomparison Project (OMIP) focuses on the physics and biogeochemistry of the ocean component of Earth system models participating in the sixth phase of the Coupled Model Intercomparison Project (CMIP6). OMIP aims to provide standard protocols and diagnostics for ocean models, while offering a forum to promote their common assessment and improvement. It also offers to compare solutions of the same ocean models when forced with reanalysis data (OMIP simulations) vs. when integr...
#1Charles A. Stock (GFDL: Geophysical Fluid Dynamics Laboratory)H-Index: 25
#2John P. Dunne (GFDL: Geophysical Fluid Dynamics Laboratory)H-Index: 41
Last.Jasmin G. John (GFDL: Geophysical Fluid Dynamics Laboratory)H-Index: 17
view all 3 authors...
#1Jasmin G. John (GFDL: Geophysical Fluid Dynamics Laboratory)H-Index: 17
#2Charles A. Stock (GFDL: Geophysical Fluid Dynamics Laboratory)H-Index: 25
Last.John P. Dunne (GFDL: Geophysical Fluid Dynamics Laboratory)H-Index: 41
view all 3 authors...
Reversibility studies suggest a lagged recovery of global mean sea surface temperatures after mitigation, raising the question of whether a similar lag is likely for marine net primary production (NPP). Here we assess NPP reversibility with a mitigation scenario in which projected Representative Concentration Pathway (RCP8.5) forcings are applied out to 2100, and then reversed over the course of the following century in a fully coupled carbon-climate earth system model. In contrast to the temper...
#1Judith HauckH-Index: 16
#2Christoph VölkerH-Index: 23
Last.John P. Dunne (GFDL: Geophysical Fluid Dynamics Laboratory)H-Index: 41
view all 18 authors...
We use a suite of eight ocean biogeochemical/ecological general circulation models from the Marine Ecosystem Model Intercomparison Project and Coupled Model Intercomparison Project Phase 5 archives to explore the relative roles of changes in winds (positive trend of Southern Annular Mode, SAM) and in warming- and freshening-driven trends of upper ocean stratification in altering export production and CO2 uptake in the Southern Ocean at the end of the 21st century. The investigated models simulat...
#1Judith Hauck (Alfred Wegener Institute for Polar and Marine Research)H-Index: 16
#2Christoph VölkerH-Index: 23
Last.John P. DunneH-Index: 41
view all 18 authors...
The Southern Ocean is one of the key regions for global carbon uptake and it is under discussion how physical changes will alter its CO2 balance both directly and indirectly through changes in biological production. Here we analyse a suite of eight RCP8.5 model simulations until 2100 from the MAREMIP and CMIP5 model intercomparison projects on changes in export production and CO2 uptake. We explore how the counter-acting effects of stronger winds ("SAM signal", less stratification) and global wa...
#1Charlotte Laufkötter (ETH Zurich)H-Index: 8
#2Meike Vogt (ETH Zurich)H-Index: 22
Last.Taketo HashiokaH-Index: 13
view all 20 authors...
Abstract. Past model studies have projected a global decrease in marine net primary production (NPP) over the 21st century, but these studies focused on the multi-model mean rather than on the large inter-model differences. Here, we analyze model-simulated changes in NPP for the 21st century under IPCC's high-emission scenario RCP8.5. We use a suite of nine coupled carbon–climate Earth system models with embedded marine ecosystem models and focus on the spread between the different models and th...
#1Charles A. Stock (GFDL: Geophysical Fluid Dynamics Laboratory)H-Index: 25
#2John P. Dunne (GFDL: Geophysical Fluid Dynamics Laboratory)H-Index: 41
Last.Jasmin G. John (GFDL: Geophysical Fluid Dynamics Laboratory)H-Index: 17
view all 3 authors...
Pronounced projected 21st century trends in regional oceanic net primary production (NPP) raise the prospect of significant redistributions of marine resources. Recent results further suggest that NPP changes may be amplified at higher trophic levels. Here, we elucidate the role of planktonic food web dynamics in driving projected changes in mesozooplankton production (MESOZP) found to be, on average, twice as large as projected changes in NPP by the latter half of the 21st century under a high ...
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