Research
Earth's energy imbalance
Earth's albedo was observed to be symmetric between the hemispheres.
- We find that dimming from clouds is mostly symmetric between the NH and SH.
- But the overall symmetry is breaking due to trends from atmospheric clear-sky reflection (a dimming of the NH and brightening of the SH).
- We attribute the Southern Ocean brightening to wind-driven sea spray aerosol increase.
- 1. Singer and Pincus (2026) https://doi.org/10.1029/2025GL119637
Aerosol-cloud interactions
How do aerosol properties influence cloud droplet activation and cloud formation?
Open-source tools for particle-based microphysics modeling
- I am a contributor to PySDM, an open-source microphysics code with examples that uses particle-based methods.
- I have also used the University of Warsaw Lagrangian Cloud Model for superdroplet-enabled large-eddy simulations.
- 1. Ming et al. (2020) https://doi.org/10.1029/2020GL091699
- 2. Bartman et al. (2022) https://doi.org/10.21105/joss.03219
- 3. de Jong, Singer, et al. (2023) https://doi.org/10.21105/joss.04968
- 4. Feingold et al. (2024) https://doi.org/10.1126/sciadv.adi8594
- 5. Lamb et al. (2026) https://doi.org/10.1029/2025MS005341
Stratocumulus cloud response to climate change
- Stratocumulus clouds are prevalent only in certain regions (e.g. off the coast of California) because they exist through a delicate balance of cool ocean temperatures below and a strong temperature inversion at the top of the boundary layer created from subsiding free-tropospheric air.
- 1. Singer and Schneider (in revision) https://doi.org/10.22541/essoar.168167352.24863390/v1
- 2. Singer and Schneider (in revision) https://doi.org/10.22541/essoar.168167204.45220772/v1
- 3. Liu-Schiaffini et al. (in revision) https://doi.org/10.48550/arXiv.2308.08794
- 4. Schiro et al. (2022) https://doi.org/10.1038/s41467-022-34787-4
3D cloud radiative effects
How large is the albedo bias in climate models resulting from 1D radiative transfer assumptions?
Related publications- 1. Singer et al. (2021) https://doi.org/10.1175/JAS-D-21-0032.1
Convective transport in the upper troposphere-lower stratosphere (UTLS)
Liz Moyer's group uses water vapor isotopes (HDO/H2O) to quantify the role of convection on transport in the UTLS.
- In summer 2017, we participated in the StratoClim aircraft campaign from of Kathmandu, Nepal.
- 1. Singer et al. (2022) https://doi.org/10.5194/amt-15-4767-2022
- 2. Khaykin et al. (2022) https://doi.org/10.5194/acp-22-3169-2022
- 3. Clouser et al. (2025) https://doi.org/10.5194/amt-18-6465-2025
- 4. Clouser et al. (2026) https://doi.org/10.5194/amt-19-1147-2026