Lukas Gudmundsson

Nov 20, 2024 | nature.com | Jonas Schwaab |Mathias Hauser |Lukas Gudmundsson |Yann Quilcaille |Quentin Lejeune |Joeri Rogelj

AbstractDue to insufficient climate action over the past decade, it is increasingly likely that 1.5 °C of global warming will be exceeded – at least temporarily – in the 21st century. Such a temporary temperature overshoot carries additional climate risks which are poorly understood. Earth System Model climate projections are only available for a very limited number of overshoot pathways, thereby preventing comprehensive analysis of their impacts.

Oct 21, 2024 | nature.com | Chantelle Burton |Seppe Lampe |Douglas Kelley |Wim Thiery |Stijn Hantson |Lukas Gudmundsson | +11 more

AbstractFire behaviour is changing in many regions worldwide. However, nonlinear interactions between fire weather, fuel, land use, management and ignitions have impeded formal attribution of global burned area changes. Here, we demonstrate that climate change increasingly explains regional burned area patterns, using an ensemble of global fire models.

May 31, 2023 | nature.com | Philippe Ciais |Mengxi Wu |Pierre Friedlingstein |Lukas Gudmundsson |Laibao Liu

CGRAnnual global atmospheric CGR spanning from 1960 to 2018 is obtained from the Greenhouse Gas Marine Boundary Layer Reference of the National Oceanic and Atmospheric Administration (NOAA/ESRL)50. According to the guideline, the annual CGR in a given year is the difference in CO2 concentration between the end of December and the start of January of that year.

Mar 24, 2023 | agupubs.onlinelibrary.wiley.com | Srinidhi Jha |Lukas Gudmundsson |Sonia I. Seneviratne

2.2 Change in the Likelihood of Hot and Dry Extremes The investigation of changes in likelihood is based on analyzing the exceedance of thresholds. The threshold for dry extremes is less than equal to the 10th percentile of the reference period data (greater than equal to the 90th percentile of negative ). Similarly, the threshold for hot extremes () is the 90th percentile of the reference period data.

Feb 22, 2023 | journals.ametsoc.org | Luke Grant |Lukas Gudmundsson |Edouard L. Davin |David Lawrence

Keywords: Principal components analysis; Regression analysis; General circulation models; Land surface model; Climate variability; Trends1. IntroductionLand-use and land-cover changes (referred to simply as “land use”) affect climate biogeochemically and biogeophysically. The biogeochemical effects of land use on climate occur through interactions in the carbon cycle, mostly moving carbon from land reserves to the atmosphere.