Browse Articles
The Role of Moisture Conveyor Belts for Precipitation in the Atacama Desert
-  22 December 2021
Key Points
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For most parts of the Atacama Desert, more than half of the total precipitation is related to moisture conveyor belts (MCBs)
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In contrast to midlatitudes, main moisture transport takes place in mid-tropospheric layers decoupled from the maritime boundary layer
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The main origin of the MCB-related moisture is found to be the Amazon Basin
Mesoscale Eddies Regulate Seasonal Iron Supply and Carbon Drawdown in the Drake Passage
-  20 December 2021
Key Points
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Resolving mesoscale ocean eddies is critical for the seasonality of the regional carbon cycle in the Drake Passage
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Eddy parameterization reduces the annual mean carbon cycle bias but does not improve the seasonal cycle
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Suppressing eddy activity increases iron supply, causing a stronger and earlier spring bloom at the expense of summertime productivity
Upper Mantle Viscosity Underneath Northern Marguerite Bay, Antarctic Peninsula Constrained by Bedrock Uplift and Ice Mass Variability
-  20 December 2021
Key Points
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GPS-measured time-varying uplift rates ranging between ∼1.6 ± 0.8 and ∼6.0 ± 0.6 mm/year over 1999.1–2016.0 in Northern Marguerite Bay
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Glaciers in the region generally show a reduced rate of surface lowering since ∼2009
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Comparing GPS and modeled viscoelastic deformation suggests a lower-viscosity upper mantle for this region with possible thin lithosphere
Sediment Recruitment and Redistribution in Mountain Channel Networks by Post‐Wildfire Debris Flows
-  17 December 2021
Key Points
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Lidar differencing reveals range-wide volumes of scour and re-deposition by post-wildfire debris flows within Santa Ynez Range canyons
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Scoured coarse-grained sediment, emplaced by prior colluvial and debris-flow processes, constituted ∼70% of the entire debris-flow volumes
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Volumes of sediment available for debris-flow scour depend on the stochastic interaction of accumulation processes and large scouring events
The North Equatorial Countercurrent and the Zonality of the Intertropical Convergence Zone
-  17 December 2021
Key Points
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The North Equatorial Countercurrent maintains the zonality of the Intertropical Convergence Zone
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The stronger the eastward NECC is, the more uniform the zonal distribution of the ITCZ precipitation is
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The two-way interaction between the NECC and the ITCZ may be important to tropical and global climate
Optimal Growth of IPV Lags AMV Modulations by up to a Decade
-  17 December 2021
Key Points
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The Interdecadal Pacific Variability (IPV) exhibits ∼3-year optimal growth, a time length beyond the upper bound of El Niño-Southern Oscillation predictability
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The optimal growth of the IPV is associated with northeastern subtropical sea surface temperature variability and pan-tropical Pacific thermocline dynamics
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The Atlantic Multidecadal Variability leads the optimal growth of the IPV by up to a decade, an important factor for IPV decadal prediction
Incision of Submarine Channels Over Pockmark Trains in the South China Sea
-  16 December 2021
Key Points
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A complex system of channels in the western South China Sea was formed by the erosion of seafloor pockmarks
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The evolution from pockmarks to channel comprises three stages: pockmark train, immature, and mature channel
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This on-going system of channels was initiated in the Late Miocene and significantly influenced by seafloor topography
Modeling the Occurrence of M∼5 Caldera Collapse‐Related Earthquakes in Kīlauea Volcano, Hawai‘i
-  28 December 2021
Key Points
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Kīlauea caldera collapse-related seismicity is a source of seismic hazard in Hawai‘i and should be included in a complete seismic hazard assessment
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Their occurrence is modeled by combining distributions for the number of caldera collapses and number of earthquakes per collapse
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The event occurrence model is non-Poisson, and this approach may be generalizable for other seismogenic processes
Slope break and avulsion locations scale consistently in global deltas
-  28 December 2021
Key Points
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Morphometric boundaries investigated in 105 modern deltas globally
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Slope break and avulsion lengths show the strongest scaling relationship, more significant than previous scaling relationships
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Processes contributing to this slope-break avulsion length scaling relationship are proposed along with conceptual model of the implications
Urbanization Aggravates Effects of Global Warming on Local Atmospheric Drying
-  28 December 2021
Key Points
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‘Urban Dry Islands’ (UDI) effects are detected across a large climatic gradient
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Urbanization exacerbates global warming and UHI effects on UDI through reducing evapotranspiration and water vapor availability
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The magnitude and frequency of UDI are more pronounced in humid regions than arid regions due to differences in vegetation and climate
A marginal stability paradigm for shear‐induced diapycnal turbulent mixing in the ocean
-  28 December 2021
Key Points
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Turbulence emerges in a marginally stable ocean interior by localized bursts in shear
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Data suggests shear instability is the prevalent facilitator of turbulence, even close to boundaries
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The marginally unstable turbulent patches seem to mix optimally during most of their life cycles
San Andreas fault stress change due to groundwater withdrawal in California’s Central Valley, 1860‐2010
-  28 December 2021
Key Points
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We estimate Central Valley groundwater unloading viscoelastic effects on present-day central San Andreas (CSAF) fault stressing
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Coulomb stress change for the CSAF during the 2006-2010 drought corresponds positively with seismicity and low frequency earthquakes
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Cumulative Coulomb stress change on the CSAF for 1860-2010 is on the order of ∼0.01-0.02 MPa depending on the lower crustal viscosity
Multiple leaking mode dispersion observations and applications from ambient noise cross‐correlation in Oklahoma
-  28 December 2021
Key Points
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Multiple leaking mode dispersion curves are extracted from ambient noise cross-correlation functions
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Spatial stacking and time windows are used to enhance the leaking modes
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The joint inversion of leaking and normal modes can reliably generate Vp and Vp/Vs ratio structures
Air Quality Forecasts Improved by Combining Data Assimilation and Machine Learning with Satellite AOD
-  28 December 2021
Key Points
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Conventional aerosol data assimilation (DA) suffers from large uncertainties when using satellite aerosol optical depth (AOD) observations
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Machine learning (ML) was applied to estimate ground PM concentrations from the satellite AOD for use in the conventional 3D-VAR DA system
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The modified DA experiment remarkably improves the PM10 and PM2.5 prediction performance compared to the conventional AOD DA experiment
A new parameterization of turbulent mixing enhanced over rough seafloor topography
-  28 December 2021
Key Points
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We parameterize the turbulent mixing enhanced over high-wavenumber bathymetry with a revised formulation of its vertical decay scale
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The vertical decay scale of bottom-enhanced mixing is given by the vertical mean free path of internal lee waves from the ocean bottom
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The upward extent of mixing is in proportion to the abyssal current velocity squared and the inverse abyssal buoyancy frequency squared
3D joint inversion of scanning magnetic microscopy data
-  28 December 2021
Key Points
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Magnetic data and microscopic inspection indicate the main source of remanent magnetization is oxide exsolution lamellae in pyroxenes
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Simultaneous inversion of scanning magnetic microscopy data acquired above and below the sample indicate heterogeneous magnetization
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Magnetic inversion results are consistent with sample’s bulk remanent magnetization measurements
Zonal structure of tropical Pacific surface salinity anomalies affects ENSO intensity and asymmetry
-  28 December 2021
Key Points
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ENSO intensity is sensitive to the zonal location of SSS anomalies and becomes strongest when they are located in the central Pacific
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Asymmetric zonal structure of SSS anomalies strengthens the asymmetry of SST anomalies between El Niño and La Niña
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Vertical mixing and entrainment dominate SSS-related SST changes during ENSO cycle
Causes of Higher Climate Sensitivity in CMIP6 Models
- Geophysical Research Letters
-  3 January 2020
Impact of Coronavirus Outbreak on NO2 Pollution Assessed Using TROPOMI and OMI Observations
- Geophysical Research Letters
-  8 May 2020
The Response in Air Quality to the Reduction of Chinese Economic Activities During the COVID‐19 Outbreak
- Geophysical Research Letters
-  18 May 2020
Extending the Global Mass Change Data Record: GRACE Follow‐On Instrument and Science Data Performance
- Geophysical Research Letters
-  24 May 2020
Puzzling Haze Events in China During the Coronavirus (COVID‐19) Shutdown
- Geophysical Research Letters
-  9 June 2020
Disentangling the Impact of the COVID‐19 Lockdowns on Urban NO2 From Natural Variability
- Geophysical Research Letters
-  17 August 2020
Continuity of Ice Sheet Mass Loss in Greenland and Antarctica From the GRACE and GRACE Follow‐On Missions
- Geophysical Research Letters
-  18 March 2020
Robust Future Changes in Meteorological Drought in CMIP6 Projections Despite Uncertainty in Precipitation
- Geophysical Research Letters
-  10 May 2020
September 2019 Antarctic Sudden Stratospheric Warming: Quasi‐6‐Day Wave Burst and Ionospheric Effects
- Geophysical Research Letters
-  8 January 2020
Role of contamination in optimal droplet production by collective bubble bursting
- Geophysical Research Letters
-  22 December 2021
A Climatology of Narrow Cold‐Frontal Rainbands in Southern California
- Geophysical Research Letters
-  20 December 2021
Did Modern Precipitation Drivers Influence Centennial Trends in the Highlands of the Atacama Desert during the Most Recent Millennium?
- Geophysical Research Letters
-  22 December 2021
Graupel Precipitating from Thin Arctic Clouds with Liquid Water Paths less than 50 g m‐2
- Geophysical Research Letters
-  20 December 2021
An observationally trained Markov Model for MJO propagation
- Geophysical Research Letters
-  20 December 2021
Increasing River Alkalinity Slows Ocean Acidification in the Northern Gulf of Mexico
- Geophysical Research Letters
-  16 December 2021
Mesoscale Eddies Regulate Seasonal Iron Supply and Carbon Drawdown in the Drake Passage
- Geophysical Research Letters
-  20 December 2021
Decadal Variability of Southeast US Rainfall in an Eddying Global Coupled Model
- Geophysical Research Letters
-  16 December 2021
Application of Vector Spherical Harmonics to the Magnetisation of Mars’ Crust
- Geophysical Research Letters
-  20 December 2021









