Rate My Professor Tim Arnold

Arnold's research focuses on changes in atmospheric composition over recent decades, with an emphasis on developing and applying high-precision ground-based measurements sensitive to greenhouse gas fluxes from local to global scales. He utilizes atmospheric transport models within mathematical inversion frameworks to quantify sources and sinks, particularly for methane and its isotopologues, to reduce uncertainties in emissions estimates and support climate change mitigation. His specializations encompass analytical chemistry, climate science, environmental sciences, meteorology and atmospheric sciences, and geochemistry. Key publications include 'Atmospheric data support a multi-decadal shift in the global methane budget towards natural tropical emissions' (Atmospheric Chemistry and Physics, 2023), 'Advancing Scientific Understanding of the Global Methane Budget in Support of the Paris Agreement' (Global Biogeochemical Cycles, 2019), 'The increasing atmospheric burden of the greenhouse gas sulfur hexafluoride (SF6)' (Atmospheric Chemistry and Physics, 2020), 'High-resolution inverse modelling of European CH4 emissions using the novel FLEXPART-COSMO TM5 4DVAR inverse modelling system' (Atmospheric Chemistry and Physics, 2022), and 'Uncertainties in Calibration of an Optical Spectrometer for Measuring Isotope Ratios in Methane' (ACS Measurement Science Au, 2026). At Lund University, he coordinates the course NGEA21 'The Climate System' and teaches in programs on physical geography, theory and methods, global elemental cycles, and environmental change. His contributions support UN SDG 13: Climate Action through oversight of the ICOS Sweden infrastructure.