Preprints
Filtering by Subject: Oceanography and Atmospheric Sciences and Meteorology
Global warming strengthens atmospheric ducting
Published: 2026-03-29
Subjects: Oceanography and Atmospheric Sciences and Meteorology
Atmospheric ducts (ADs) provide efficient electromagnetic wave channels for beyond line-of-sight (BLOS) propagation and can serve as a sensitive diagnostic factor for the change of lower atmosphere. Based on the ERA5 model-level reanalysis data (1979–2024), a global-scale assessment of the response of AD evolution to global warming has been revealed for the first time. The occurrence probability, [...]
A snag for nutrient fertilization: decoupled production and export
Published: 2026-03-28
Subjects: Earth Sciences, Ecology and Evolutionary Biology, Environmental Sciences, Life Sciences, Marine Biology, Microbiology, Oceanography and Atmospheric Sciences and Meteorology, Physical Sciences and Mathematics
Interest in nutrient fertilization waned after inconclusive field experiments, but has resurged. Collating Southern Ocean \textit{in-situ} observations and available fertilization simulations, we find phytoplankton primary production and organic carbon export are uncorrelated in the largest high-nutrient-low-chlorophyll (HNLC) region, while model estimates cast doubt on realistic deployments [...]
The Oceanic Response to Winds in the Antarctic Sea Ice Loss at the end of the 1970s
Published: 2026-03-28
Subjects: Climate, Oceanography, Oceanography and Atmospheric Sciences and Meteorology, Physical Sciences and Mathematics
The sea ice extent (SIE) in the Southern Ocean experienced a substantial decline in the late 1970s, although less pronounced than the one observed in 2016. Though several studies explain the decline since 2016, the 1970s drop is critical in understanding the long-term variability of SIE. To investigate the underlying mechanisms for this decline, we conducted wind stress-forced multi- ensemble [...]
How well do global ocean approaches constrain local pCO2?
Published: 2026-03-23
Subjects: Oceanography and Atmospheric Sciences and Meteorology
The ocean absorbs 29% of humanity’s annual anthropogenic carbon dioxide (CO2) emissions, and the future of climate change is strongly dependent on how this sink evolves. Marine Carbon Dioxide Removal (mCDR) approaches to enhance this sink are actively being developed. In the interest of understanding how well state-of-the-art global products and models can help to distinguish mCDR signals from [...]
Fluctuation-induced dissipation for ocean surface waves
Published: 2026-03-22
Subjects: Fluid Dynamics, Oceanography, Oceanography and Atmospheric Sciences and Meteorology, Physical Sciences and Mathematics, Physics, Statistical, Nonlinear, and Soft Matter Physics
Phase averaging is a one-time operation. Irreversibletransport is not.Here we identify a coupling hidden in the Navier-Stokesequations for surface waves propagating through turbulencewhose one-time phase average vanishes but whose two-timeautocorrelation yields a finite Green-Kubo frictioncoefficient.Classical phase averaging removes this stochastic vortexforce, the bilinear coupling between wave [...]
Are high-resolution urban datasets necessary for accurate heat exposure modelling in cities?
Published: 2026-03-17
Subjects: Earth Sciences, Oceanography and Atmospheric Sciences and Meteorology
Accurately capturing the spatial variability of urban heat exposure is important for planning heat-resilient cities. While regional climate models have historically simplified urban characteristics, high-resolution urban morphological datasets now present an opportunity to produce spatially accurate heat maps. In this vein, this study evaluates four morphological datasets for Sydney, Australia in [...]
Emerging Shift in the Indian Summer Monsoon Sensitivity to Equatorial Indian Ocean Sea Surface Temperature Anomalies: Insights from High-Resolution AGCM SST Patch Experiments
Published: 2026-03-17
Subjects: Oceanography and Atmospheric Sciences and Meteorology
Indian Summer Monsoon (ISM) rainfall exhibits strong sensitivity to sea surface temperature anomalies (SSTAs) across four Indo-Pacific nodal regions: The Western and Eastern Equatorial Indian Ocean (WEIO and EEIO), the Western Pacific (WPAC), and the Niño3.4 region. Historically, positive ISM rainfall anomalies are associated with warming in WEIO and WPAC, while warming in EEIO and Niño3.4 [...]
Volcanic CO2 degassing and microbial carbon fixation in a caldera offshore
Published: 2026-03-14
Subjects: Earth Sciences, Environmental Microbiology and Microbial Ecology Life Sciences, Oceanography and Atmospheric Sciences and Meteorology, Volcanology
Calderas are subsided volcanic terrains formed by the destructive power of some of the largest volcanic eruptions on Earth. Many such depressions globally are today submerged by crater lakes or seawater, rendering them less accessible to scientific scrutiny, and hence more complicated to monitor during unrest. One of such systems is the restless, partly submerged Campi Flegrei caldera (CFc) near [...]
Interpretable Relations between Tropical Sea Surface Temperature and U.S. Precipitation in Winter Season Forecasts
Published: 2026-03-13
Subjects: Oceanography and Atmospheric Sciences and Meteorology, Physical Sciences and Mathematics
We explore the large-scale relations between anomalies of global tropical sea surface temperature (SST) and U.S. precipitation to assess the sources of December-February (DJF) predictability and skill. Canonical Correlation Analysis (CCA) is applied to forecasts from NOAA's latest seasonal prediction system, the Seamless System for Prediction and EArth System Research (SPEAR). We find that DJF [...]
Crowdsourced air temperature data for the evaluation of urban microscale simulations: Insights into spatiotemporal patterns from three German cities
Published: 2026-03-10
Subjects: Oceanography and Atmospheric Sciences and Meteorology
Rapid development of microscale urban climate models in recent years requires ongoing model evaluation under different scenarios and conditions. In a previous study, we utilised crowdsourced air temperature data from Netatmo citizen weather stations (CWS) for the evaluation of the PALM model during a hot summer day in the city of Bochum, Germany. The data proved valuable due to their high spatial [...]
Bridging ERA5 Reanalysis Data and Regulatory Air Dispersion Modelling: A Transparent Workflow Implemented through the WindRose Toolkit
Published: 2026-03-07
Subjects: Computer Sciences, Earth Sciences, Environmental Sciences, Oceanography and Atmospheric Sciences and Meteorology, Physical Sciences and Mathematics
Regulatory atmospheric dispersion models such as AERMOD and CALPUFF are widely adopted for Environmental Impact Assessments involving atmospheric emissions. Despite their scientific maturity and regulatory acceptance, the practical application of these modelling systems outside the North American context is often constrained by the limited availability of suitable meteorological datasets. In many [...]
Arctic summer cloud optical properties and annual sea-ice retreat
Published: 2026-03-07
Subjects: Earth Sciences, Oceanography and Atmospheric Sciences and Meteorology, Physical Sciences and Mathematics
Changes in Arctic sea-ice areal coverage have major ecological, climate, and economic implications and are driven by diverse natural and anthropogenic forcings acting over a wide range of time scales. Cloud-related variability in atmospheric radiative budgets is suspected to be particularly important in year-to-year changes in ice melt. Here, we describe a decade of pan-Arctic satellite light [...]
Proof-of-Concept: Vertical Wind Profile Reconstruction from Ground-Based Optical Sensors Using Machine Learning
Published: 2026-03-01
Subjects: Atmospheric Sciences, Mathematics, Oceanography and Atmospheric Sciences and Meteorology, Physical Sciences and Mathematics
Vertical wind profiles are critical for weather forecasting, aviation safety, and atmospheric research, yet remain sparsely observed due to the high cost of radiosondes (€100–200 per launch) and wind profiler radars (€100,000–1,000,000). We present a proof-of-concept demonstrating that ground-based optical measurements from low-cost amateur radio sensors can predict upper-air wind speeds across [...]
Basal Melt Dominance in Grounding-Line Dynamics: SAR Interferometry Reveals How Ocean Thermal Forcing Outpaces Tidal and Seasonal Controls in Antarctic Ice Shelves
Published: 2026-02-18
Subjects: Earth Sciences, Geophysics and Seismology, Glaciology, Oceanography, Oceanography and Atmospheric Sciences and Meteorology, Physical Sciences and Mathematics
The grounding line hinge position for the Fimbul Ice Shelf (Antarctic Peninsula) was determined using Synthetic Aperture Radar (SAR) Interferometric data from June 2023 through October 2024. The data were used to determine the hinge position over eight different time intervals (i.e., SAR Pairs) at an average spatial resolution of 20 meters. The Fimbul Ice Shelf area of interest (AOI) was defined [...]
Filling the monitoring gap: Aquatic ecosystem metabolism as a cost-effective, scalable tool for assessing marine carbon dioxide removal
Published: 2026-02-18
Subjects: Earth Sciences, Environmental Sciences, Oceanography and Atmospheric Sciences and Meteorology
Marine carbon dioxide removal (mCDR) is an emerging climate mitigation solution increasingly recognized as necessary to supplement greenhouse gas emission reductions. Various mCDR methods, from biotic to abiotic measures, are being piloted, fueled by enthusiasm from governments and the private sector. As companies start to sell carbon credits, standards for monitoring, reporting, and verification [...]