Preprints
Filtering by Subject: Atmospheric Sciences
Performance and sensitivity of column-wise and pixel-wise methane retrievals for imaging spectrometers
Published: 2023-02-16
Subjects: Atmospheric Sciences
Airborne imaging spectrometers are increasingly used to map methane (CH4) at high spatial resolution (e.g., 3-5 m). This study presents an analysis of two common approaches to retrieve methane from imaging spectrometer data. The approaches are (1) the columnwise matched filter (CMF), and (2) the physics-based Iterative Maximum A Posteriori – Differential Optical Absorption Spectroscopy [...]
Soil moisture modulation of midlatitude heat waves
Published: 2023-02-10
Subjects: Atmospheric Sciences, Climate, Earth Sciences, Hydrology, Oceanography and Atmospheric Sciences and Meteorology, Physical Sciences and Mathematics
Heat waves are broadly expected to increase in severity and frequency under climate change. Case studies highlight a number of physical mechanisms that play a role in present-day heat waves, which typically occur during a coalescence of anomalous atmospheric and land surface conditions. However, a unified model of heat wave physics is lacking, primarily owing to difficulty in disentangling the [...]
Size Resolved Aerosol Characterization and In-field Comparative Evaluation of TSI 1 nm SMPS at Lake Michigan Coastal Station
Published: 2023-01-31
Subjects: Atmospheric Sciences
The atmospheric particle size distribution was measured at a rural lakeshore site (Zion, IL 42.468 N, 87.810 W) during the Lake Michigan Ozone Study (LMOS 2017) in May and June 2017. The full aerosol size distribution was continuously measured by two scanning mobility particle sizers and an aerodynamic particle sizer in the range of 1.02 to 8671 nm (electrical mobility diameter). The Zion site, [...]
Deforestation as an anthropogenic driver of mercury pollution
Published: 2023-01-24
Subjects: Atmospheric Sciences, Biogeochemistry, Earth Sciences, Environmental Sciences
Deforestation reduces the capacity of the terrestrial biosphere to take up the toxic pollutant mercury (Hg) and enhances the release of secondary Hg from soils. The consequences of deforestation for Hg cycling are not currently considered by anthropogenic emissions inventories or specifically addressed under the global Minamata Convention on Mercury. Using global Hg modeling constrained by field [...]
Weakening of the Indian Ocean Dipole in the mid-Holocene due to the mean oceanic climatology change
Published: 2023-01-10
Subjects: Atmospheric Sciences, Climate, Meteorology, Oceanography
The Indian Ocean Dipole (IOD) is one of the leading modes of interannual climate variability in the tropical Indian Ocean (IO). Paleoclimate provides real climate scenarios to examine IOD behaviors and the linkage to basic states. Based on 18 models from the Paleoclimate Modelling Intercomparison Project phase 3 and 4 (PMIP 3/4), the IOD change from the preindustrial period to mid-Holocene is [...]
The Dry Sky: Futures for Humanity’s Modification of the Atmospheric Water Cycle
Published: 2022-12-22
Subjects: Atmospheric Sciences, Climate, Fresh Water Studies, Hydrology, Meteorology, Natural Resource Economics, Natural Resources Management and Policy, Nature and Society Relations, Sustainability, Water Resource Management
Humanity is modifying the atmospheric water cycle, via land use, climate change, air pollution, and weather modification. Given the implications of this, we present a theoretical framing of atmospheric water as an economic good. Historically, atmospheric water was tacitly considered a ‘public good’ since it was neither actively consumed (rival) nor controlled (exclusive). However, given [...]
Air Quality-Related Equity Implications of U.S. Decarbonization Policy
Published: 2022-10-22
Subjects: Atmospheric Sciences, Environmental Indicators and Impact Assessment, Environmental Sciences, Sustainability
We quantify potential air pollution exposure reductions resulting from U.S. federal carbon policy, and consider the implications of resulting health benefits for exposure disparities across racial/ethnic groups. We assess reductions in carbon dioxide (CO2) emissions of 50% in 2030 relative to 2005 levels, comparable in magnitude to the 2022 Inflation Reduction Act. Using energy-economic scenarios [...]
North African dust absorbs less solar radiation than estimated by models and remote-sensing retrievals
Published: 2022-10-17
Subjects: Atmospheric Sciences, Climate
Desert dust accounts for a large fraction of shortwave radiation absorbed by aerosols, which adds to the climate warming produced by greenhouse gases. However, it remains uncertain exactly how much shortwave radiation dust absorbs. We leverage in-situ measurements of dust single-scattering albedo to constrain absorption at mid-visible wavelength by North African dust, which accounts for [...]
Skilful forecasts of summer rainfall in the Yangtze River Basin from November
Published: 2022-10-10
Subjects: Atmospheric Sciences, Climate
Variability in the East Asian Summer Monsoon (EASM) brings the risk of heavy flooding or drought to the Yangtze River Basin, with potentially devastating impacts. Early forecasts of the likelihood of enhanced or reduced monsoon rainfall can enable better management of water and hydropower resources by decision-makers, supporting livelihoods and major economic and population centres across Eastern [...]
Characteristics of Dust Storms Generated by Trapped Waves in the Lee of Mountains
Published: 2022-09-29
Subjects: Atmospheric Sciences, Climate, Meteorology, Oceanography and Atmospheric Sciences and Meteorology
Dust storms are ubiquitous in the Earth's atmosphere, yet the physical processes underlying dust emission and subsequent transport are not always understood, in-part due to the wide variety of meteorological processes that can generate high winds and dust. Here we use in-situ measurements and numerical modeling to demonstrate that vertically trapped atmospheric waves generated by air flowing over [...]
Rapid estimation of climate-air quality interactions in integrated assessment using a response surface model
Published: 2022-09-15
Subjects: Atmospheric Sciences, Climate, Environmental Health and Protection, Environmental Public Health, Environmental Studies
Air quality and climate change are substantial and linked sustainability challenges, and there is a need for improved tools to assess the implications of addressing them in combination. High-fidelity chemistry-climate simulations can capture combined climate-air quality responses to policy change, but computational cost has prevented integration of accurate air quality impacts into integrated [...]
Unified theoretical framework for mixing state of black carbon
Published: 2022-08-31
Subjects: Atmospheric Sciences
Black carbon (BC) plays an important role in the climate system due to its strong warming effect, yet the magnitude of this effect is highly uncertain due to the complex mixing state of aerosols. Here we build a unified theoretical framework to describe BC’s mixing states, linking dynamic processes to BC coating thickness distribution, and show its self-similarity for sites in diverse [...]
Thermal forcing expected to modulate convection in a mechanically forced stationary wave
Published: 2022-08-16
Subjects: Atmospheric Sciences, Climate, Earth Sciences, Physical Sciences and Mathematics
This is a reply to the comment by Lofverstrom and Thirumalai on our publication in Nature. That comment and this reply underwent peer review at Nature, and Nature declined to publish the exchange
Distinct roles of cyclones and anticyclones in setting the midwinter minimum of the North Pacific eddy activity. Part II: Eulerian eddy statistics and energetics
Published: 2022-08-14
Subjects: Atmospheric Sciences
The characteristics and dynamics of midlatitude storm-tracks have been long investigated. Nevertheless, our understandings of the storm-tracks, especially the midwinter minimum of the North Pacific storm-track activity, are still limited, partly because Eulerian eddy statistics are incapable of separating cyclonic and anticyclonic contributions. Here we investigate the detailed seasonal evolution [...]
A Technical Overview of the North Carolina ECONet
Published: 2022-07-20
Subjects: Agricultural Science, Agriculture, Atmospheric Sciences, Climate, Earth Sciences, Environmental Education, Environmental Monitoring, Environmental Public Health, Environmental Sciences, Forest Management, Meteorology, Oceanography and Atmospheric Sciences and Meteorology, Plant Sciences
Regional weather networks–also referred to as mesonets–are imperative for filling in the spatial and temporal data gaps between nationally supported weather stations. The North Carolina Environment and Climate Observing Network (ECONet) fills this regional role; it is a mesoscale network of 44 (as of 2023) automated stations collecting 12 environmental variables every minute across North [...]