4 papers
Auditing the Global Carbon Budget: Exploring the 2024--2025 Vintage Shift
Mikkel Bennedsen, Eric Hillebrand, Siem Jan Koopman
The Global Carbon Budget (GCB), the community reference dataset for the carbon cycle, is reissued annually. The 2025 release introduces several adjustments to the published series…
Continuous-time state space analysis of d18O, d13C, and CO2 in the Cenozoic Era
Mikkel Bennedsen, Eric Hillebrand, Kathrine Larsen +2
We develop a continuous-time state-space framework for the joint reconstruction of three Cenozoic climate proxies, benthic foraminiferal d18O and d13C and atmospheric CO2, from irr…
Neural networks for nonlinear regression with serially correlated disturbances: Evidence from cloud cover
Sebastian Jensen, Siem Jan Koopman
We propose a new treatment of nonlinear regression with serially correlated disturbances that incorporates autoregressive moving average structures into feedforward neural networks…
A Statistical Reduced Complexity Climate Model for Probabilistic Analyses and Projections
Mikkel Bennedsen, Eric Hillebrand, Siem Jan Koopman
We propose a new statistical reduced complexity climate model. The centerpiece of the model consists of a set of physical equations for the global climate system which we show how…