Joachim Segschneider
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View article: Impact of the Central American and the Indonesian seaways on the ocean circulation and oxygen minimum zone in the tropical Pacific
Impact of the Central American and the Indonesian seaways on the ocean circulation and oxygen minimum zone in the tropical Pacific Open
The tectonic change in geometry of two tropical seaways, the Central American Seaway (CAS) and Indonesian seaway, during the mid-Miocene to mid-Pliocene (~16-3 Ma BP) is thought as a key factor for the development of the present-day tropic…
View article: Simulating glacial-interglacial CO2 variations: What's right with CLIMBER?
Simulating glacial-interglacial CO2 variations: What's right with CLIMBER? Open
Despite intense efforts, current generation comprehensive Earth system models have, to our knowledge, not been able to simulate the full extent of the atmospheric pCO2 drawdown (as recorded in ice cores) during the Last Glacial Maximum (LG…
View article: Effect of an Open Central American Seaway on Ocean Circulation and the Oxygen Minimum Zone in the Tropical Pacific From Model Simulations
Effect of an Open Central American Seaway on Ocean Circulation and the Oxygen Minimum Zone in the Tropical Pacific From Model Simulations Open
The tectonic closure of the Central American Seaway (CAS) during the mid‐Miocene to mid‐Pliocene (∼16–3 Ma BP) is thought of as a key interval for the onset of the present‐day tropical Pacific oxygen minimum zone (OMZ). In this study we in…
View article: Effect of tectonic closure of the American Seaway on oxygen minimum zone in the tropical Pacific from model simulations
Effect of tectonic closure of the American Seaway on oxygen minimum zone in the tropical Pacific from model simulations Open
The world’s largest oxygen minimum zone (OMZ) resides in the eastern tropical Pacific where poorly ventilated “shadow zone”, created by stagnant tropical cyclonic gyre is complemented by intensive biological consumption o…
View article: Climate change disrupts core habitats of marine species
Climate change disrupts core habitats of marine species Open
Driven by climate change, marine biodiversity is undergoing a phase of rapid change that has proven to be even faster than changes observed in terrestrial ecosystems. Understanding how these changes in species composition will affect futur…
View article: Evolution of the tropical Pacific oxygen minimum zone during the Miocene-Pliocene from model simulations: A role of the Panama Isthmus closure 
Evolution of the tropical Pacific oxygen minimum zone during the Miocene-Pliocene from model simulations: A role of the Panama Isthmus closure  Open
<p>The world&#8217;s largest oxygen minimum zone (OMZ) resides in the eastern tropical Pacific where a poor oceanic ventilation and high biological production are both favourable for ocean oxygen deficiency in this area. The mode…
View article: Reviews and syntheses: Present, past, and future of the oxygen minimum zone in the northern Indian Ocean
Reviews and syntheses: Present, past, and future of the oxygen minimum zone in the northern Indian Ocean Open
Decreasing concentrations of dissolved oxygen in the ocean are considered one of the main threats to marine ecosystems as they jeopardize the growth of higher organisms. They also alter the marine nitrogen cycle, which is strongly bound to…
View article: Present past and future of the OMZ in the northern Indian Ocean
Present past and future of the OMZ in the northern Indian Ocean Open
Decreasing concentrations of dissolved oxygen and the resulting expansion of anaerobic ecosystems is a major threat to marine ecosystem services because it favors the formation of greenhouse gases such as methane, endangers the growth of e…
View article: CO <sub>2</sub> drawdown due to particle ballasting by glacial aeolian dust: an estimate based on the ocean carbon cycle model MPIOM/HAMOCC version 1.6.2p3
CO <sub>2</sub> drawdown due to particle ballasting by glacial aeolian dust: an estimate based on the ocean carbon cycle model MPIOM/HAMOCC version 1.6.2p3 Open
Despite intense efforts, the mechanisms that drive glacial–interglacial changes in atmospheric pCO2 are not fully understood. Here, we aim at quantifying the potential contribution of aeolian dust deposition changes to the atmospheric pCO2…
View article: CO <sub>2</sub> drawdown due to particle ballasting and iron addition by glacial aeolian dust: an estimate based on the ocean carbon cycle model MPIOM/HAMOCC version 1.6.2p3
CO <sub>2</sub> drawdown due to particle ballasting and iron addition by glacial aeolian dust: an estimate based on the ocean carbon cycle model MPIOM/HAMOCC version 1.6.2p3 Open
Despite intense efforts, the mechanisms that drive glacial–interglacial changes in atmospheric pCO2 are not fully understood. Here, we aim at quantifying the potential contribution of aeolian dust deposition changes to the atmospheric pCO2…
View article: Climate and marine biogeochemistry during the Holocene from transient model simulations
Climate and marine biogeochemistry during the Holocene from transient model simulations Open
Climate and marine biogeochemistry changes over the Holocene are investigated based on transient global climate and biogeochemistry model simulations over the last 9500 years. The simulations are forced by accelerated and non-accelerated o…
View article: Glacial–interglacial changes and Holocene variations in Arabian Sea denitrification
Glacial–interglacial changes and Holocene variations in Arabian Sea denitrification Open
At present, the Arabian Sea has a permanent oxygen minimum zone (OMZ) at water depths between about 100 and 1200 m. Active denitrification in the upper part of the OMZ is recorded by enhanced δ15N values in the sediments. Sediment cores sh…
View article: Climate and marine biogeochemistry during the Holocene from transient model simulations
Climate and marine biogeochemistry during the Holocene from transient model simulations Open
Climate and marine biogeochemistry changes over the Holocene are investigated based on transient global climate and biogeochemistry model simulations over the last 9,500 yr. The simulations are forced by accelerated and non-accelerated orb…
View article: Glacial-Interglacial changes and Holocene variations in Arabian Sea denitrification
Glacial-Interglacial changes and Holocene variations in Arabian Sea denitrification Open
At present the Arabian Sea has a permanent oxygen minimum zone (OMZ) at water depths between about 100 m and 1200 m. Active denitrification in this OMZ is recorded by enhanced δ15N values in the sediments. Sediment cores show a δ15N increa…
View article: Alkenone SST and stable nitrogen isotopes in Arabian Sea sediments
Alkenone SST and stable nitrogen isotopes in Arabian Sea sediments Open
At present the Arabian Sea has a permanent oxygen minimum zone (OMZ) at water depths between about 100 m and 1200 m. Active denitrification in this OMZ is recorded by enhanced d15N values in the sediments. Sediment cores show a d15N increa…
View article: Inconsistent strategies to spin up models in CMIP5: implications for ocean biogeochemical model performance assessment
Inconsistent strategies to spin up models in CMIP5: implications for ocean biogeochemical model performance assessment Open
During the fifth phase of the Coupled Model Intercomparison Project (CMIP5) substantial efforts were made to systematically assess the skill of Earth system models. One goal was to check how realistically representative marine biogeochemic…