80 Views

Fully Funded PhD and Postdoc at Bern University of Applied Science

Position Title: PostDoc Modeling past changes in CO2 and ocean biogeochemistry

Location: Physics Institut

Position Type: 80% – 100% | temporary employment

Duration: 30 months

Deadline: Open Until Filled

Summary: Reconstructions of atmospheric CO2, marine biogeochemistry, and climate reveal a fascinating, yet still enigmatic, spectrum of variability. During the Mid-Pleistocene Transition, ice age cycles changed the periodicity from 41,000 to 100,000 years without a corresponding change in orbital forcing. CO2 jumps, which originate from a pulse-like CO2 release on centennial time scales, were recently detected, expanding the variability spectrum from glacial-interglacial and the well-known millennial-scale CO2 maxima. The PostDoc will investigate forcing-response sensitivities by vary-ing forcing mechanisms with a fixed periodicity in simulations with the Bern3D model. Glacial-interglacial simulations will be performed to elucidate the role of individual mechanisms on CO2 and multi-proxy evolution. The response of CO2 and ocean biogeochemistry to perturbations in freshwater or wind stress will be probed for different states of the model ocean. Model outcomes will be analyzed in the light of proxy data for a broad set of parameters, including carbon iso-topes, nutrients, oxygen, carbonate ion, preformed, remineralized, ideal age and dye tracers, noble gases, and isotopes of rare earth elements in the ocean, opal, calcium carbonate, organic matter in sediments, and CO2 and N2O in the atmosphere. The work will be carried out in collabo-ration with members from the division and benefit from in-house expertise in ice core sciences and land biosphere modeling.

Position Title: PostDoc Carbon Isotopes in the Community Earth System Model

Location: Physics Institute

Position Type: 80% – 100% | temporary employment

Duration: 30 Months

Deadline: Open Until Filled

Summary: The novel combination of isotope-enabled Earth System Models with isotopic data opens a strategic research area with a multitude of interesting applications. For example, spatial gradients and temporal changes in isotopes constrain changes in anthropogenic carbon as well as transport rates from the stratosphere to the ocean bottom. Carbon isotope data are used to identify the imprint of fossil fuel carbon in atmospheric air. Carbon isotopes permit the assessment of changes in water use efficiency, transpiration, and tree phenology on land. Radiocarbon data are used to reconstruct solar activity and isotopic data are key to unravel climate processes on paleo time scales. Despite the multitude of applications, isotope-enabled Earth System Model simulations are largely missing. The plan is to perform simulations with the 13C and 14C-enabled CESM2 over the industrial period and the future to disentangle the influence of different drivers and to compare results with a wide range of observations for model evaluation and improved process understanding.

Position Title: PostDoc Modeling land biosphere greenhouse gas sources and sinks

Location: Physics Institute

Position Type: 80% – 100% | temporary employment

Duration: 30 Months

Deadline: Open Until Filled

Summary: Analyses of ice cores, as carried out in our division, reveal a rich spectrum of variations in the concentration of the greenhouse gases CO2, CH4, and N2O from decadal to glacial-interglacial timescales. The plan is to explore and quantify the terrestrial mechanisms contributing to these variations and to use paleo information in combination with modern data for improved understand-ing. Monte Carlo simulations with Latin Hypercube parameter sampling will be applied for proba-bilistic projections and to constrain the C-N cycles, the role of nitrogen limitation for the carbon sink, and CO2-N2O-CH4-climate feedbacks with observations . Simulated emissions will be used in combination with an atmospheric transport matrix to simulate the seasonal cycles of GHGs at different stations worldwide. The PostDoc will further collaborate to set up and analyze simula-tions with the Bern3D-LPX Earth System Model of Intermediate Complexity. LPX-Bern results will be provided to the Global Carbon Project, Trends in the land carbon cycle project (TRENDY), and the atmospheric inverse modeling community.

Position Title: Post-doc researcher

Location: Institute of Communication and Media Studies

Position Type: 100% – 100% | temporary employment

Deadline: Open Until Filled

Summary: At the Institute of Communication and Media Studies (ikmb) of the University of Bern, a position is available as a Post-doc researcher.

The position will be available from August 1st, 2021 (or by appointment) for an initial period of three years. It is intended to serve the purpose of scientific qualification.

Position Title: Post-doc

Location: Institute of Communication and Media Studies

Position Type: 100% – 100% | temporary employment

Duration: Limited for 4 years

Deadline: Open Until Filled

————————————————

Welcome to Join Our Social Networks So You Never Miss Updates

Also, Invite and Share with your Friends

FOLLOW AND LIKE FACEBOOK PAGECLICK HERE
JOIN FACEBOOK GROUPCLICK HERE
JOIN WhatsApp GROUPCLICK HERE

 

Disclaimer

————————————————

Leave a Reply

error: Alert: Content is protected !!