Browse Articles
Microphysical Differences in the Concentric Eyewalls of Typhoon Lekima (2019)
-  6 October 2022
Key Points
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Different polarimetric radar signatures were present in the concentric eyewalls of Typhoon Lekima (2019)
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Large drops are produced dominantly by the warm-cloud (cold-cloud) processes in the outer (inner) eyewall
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Different dynamical structures in the concentric eyewalls of Lekima are responsible for the variation in their microphysics
Inherited Heterogeneities Can Control Viscous Subduction Zone Deformation of Carbonates at Seismogenic Depths
-  3 October 2022
Key Points
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Carbonate sediments and veins are common in subduction zone input sequences and are typically underthrust near the plate interface
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Underthrust carbonates deform faster by dynamic recrystallization and dissolution-precipitation processes at lower temperature than quartz
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Grain-scale heterogeneities localize shear strain in calcite veins by promoting viscous deformation at seismogenic zone temperatures
Lengthening Dry Spells Intensify Summer Heatwaves
-  3 October 2022
Key Points
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The average dry spell (DSL) length has increased by 0.46 day/decade over the global continents since the 1970s
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The robust and widespread relationships between the average DSL length and heatwave duration and severity were found
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The shortening average DSL length associated with heatwaves indicated an enhancing coupling process between DSL and heatwaves
Accelerated Transition Between Dry and Wet Periods in a Warming Climate
-  3 October 2022
Key Points
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Approximately three-fifths (59%) of global land area are projected to experience accelerated transition between dry and wet periods
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Southern Asia suffers the most from severe transition between dry and wet periods
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Enhanced precipitation and potential evapotranspiration variabilities contribute to the accelerated dry-to-wet transitions
Multidecadal Regime Shifts in North Pacific Subtropical Mode Water Formation in a Coupled Atmosphere-Ocean-Sea Ice Model
-  1 October 2022
Key Points
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Driving mechanisms for the North Pacific subtropical mode water formation exhibit a regime shift with a periodicity of about 50–70 years
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Multidecadal regime shifts are associated with meridional and zonal shifts in the Aleutian Low (AL)
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Position shift of the AL affects the variability of the local air-sea flux and remotely driven oceanic dynamics
The Unprecedented Character of California's 20th Century Enhanced Hydroclimatic Variability in a 600-Year Context
-  1 October 2022
Key Points
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California's hydroclimate shows enhanced variability caused by increasingly wet extremes during the 20th century
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Tree-ring based hydroclimate reconstructions suggest that this statewide configuration has not been seen in the past 600 years
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The 16th century shows enhanced hydroclimate variability driven by an increase in the magnitude of dry extremes, rather than wet extremes
Contrasting Climatic Trends of Atmospheric River Occurrences Over East Asia
-  1 October 2022
Key Points
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The mean annual occurrences of atmospheric rivers (ARs) show increases in low latitudes but decreases in high latitudes over East Asia
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The “dipole” pattern of long-term AR trends is associated with contrasting dynamic and thermodynamic responses
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Such changes in annual AR occurrences contribute to the “Southern-Flood Northern-Drought” precipitation pattern over eastern China
Evaluation of Extreme Soil Moisture Conditions During the 2020 Sahel Floods and Implications for Disease Outbreaks
-  1 October 2022
Key Points
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Above-normal precipitation of up to 600 mm locally led to flooding in the African Sahel during the 2020 growing season (June-October)
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Precipitation and surface soil moisture data indicate that this event was among the most extreme in the region in recent decades
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This event is linked with disease outbreaks, and soil moisture is potentially a better indicator of outbreak risk than precipitation alone
Rupture nucleation on a periodically heterogeneous interface
-  6 October 2022
Key Points
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We provide experimental observations of rupture nucleation on a periodically heterogeneous interface in mode II
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We observe in some cases an alternation of fast and slow rupture episodes correlated to the position of the heterogeneity
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Despite the rupture velocity changes at small scale, the nucleation is a globally accelerating process at larger scale
Planet Size Controls Fe Isotope Fractionation Between Mantle and Core
-  6 October 2022
Key Points
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We constrained the Fe isotope fractionation factor for the silicate mantle up to 30 GPa using a bulk silicate Earth composition
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We present a holistic Fe isotope fractionation model for core formation considering pressure, temperature, composition, and redox state
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Our model shows that core formation can cause the mantle of small planetary bodies to be light in Fe isotopes, but heavy for that of Earth
Modeling Snow Dynamics and Stable Water Isotopes Across Mountain Landscapes
-  6 October 2022
Key Points
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Precipitation timing, phase, and isotopic value dominate meltwater inputs. Fractionation accounts for less than 25% total enrichment
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The most depleted isotopic water inputs occur in the upper subalpine where snow accumulation is high and rainfall is low
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Deep snowpack and shading of conifer forests limit the influence of vapor loss on snowmelt
The 2021 Mw 7.3 East Cape earthquake: Triggered Rupture in Complex Faulting Revealed by Multi-Array Back-projections
-  6 October 2022
Key Points
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We apply a multi-array 3D back-projection to image the rupture process of the 2021 Mw 7.3 East Cape earthquake
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Our results reveal a bilateral rupture predominantly propagating upward from 70 km and a triggered rupture at ∼ 10 km
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The deep rupture is in the mantle of the subducting Pacific plate, which is possibly related to a delaminating lower crust
Analysis of turbulence reports and ERA5 turbulence diagnostics in a tropopause-based vertical framework
-  6 October 2022
Key Points
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Atmospheric turbulence over the winter North Atlantic exhibits a pronounced tropopause-following behavior
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Tropopause-based mapping sorts turbulence diagnostics by atmospheric layer and reveals distinct features in the vertical distribution
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Turbulence occurs comparatively frequently in the layer which is colocated to the chemical transition between troposphere and stratosphere
Monsoon seasonality advanced by opposite-hemisphere continental drift
-  6 October 2022
Key Points
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A subtropical continent shifts the opposite-hemisphere summer monsoon seasonality forward
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The anomalous high pressure drives cross-equatorial flow, which premoistens and promotes monsoon onset
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The critical latitude of the continent to activate this modulation is ∼25 degrees from equator
Spectral characteristics of ionospheric disturbances over the southwestern Pacific from the January 15, 2022 Tonga eruption and tsunami
-  6 October 2022
Key Points
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We see distinct phase arrivals in the ionosphere for a supersonic wave, Lamb wave, and tsunami (the latter is validated by ocean sensors)
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Phase arrivals begin to separate at ∼1000 km from Tonga and are fully separated by ∼2200 km
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We highlight a faster disturbance that propagates one hour post-eruption and meets the tsunami perturbation ∼3000 km from the volcano
Using CMIP6 models to assess the significance of the observed trend in the Atlantic Meridional Overturning Circulation
-  6 October 2022
Key Points
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The 2004-2020 observed AMOC trend is not significant relative to CMIP6 model natural variability
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CMIP6 models largely disagree on AMOC variability, including at decadal and longer periods
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It is periods longer than the observational window that set AMOC trend detectability thresholds
Seasonal-Interannual Predictions of Summer Precipitation over the Tibetan Plateau in North American Multimodel Ensemble
-  6 October 2022
Key Points
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Dynamical prediction skills of the summer precipitation over TP are regionally dependent in NMME, with higher skill in the southwestern TP
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Ability of the models in reproducing the Pacific SST-precipitation relation is highly responsible for the southwest-TP prediction skills
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Prediction skills vary with the observational datasets and their mean tends to provide the highest skill scores over the southwestern TP
Acoustics reveals short-term air temperature fluctuations near Mars’ surface
-  6 October 2022
Key Points
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Sound speed derived temperature is used to study the microscale turbulence at an unprecedented short response time
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Air temperature experiences fluctuations as high as ±7 K/s, which has never been reported in situ, nor resolved by mesoscale atmospheric models
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Sonic temperature fluctuations follow the daytime turbulence pattern and find their origin in complex surface-atmosphere interactions
Warmer and Drier Fire Seasons Contribute to Increases in Area Burned at High Severity in Western US Forests From 1985 to 2017
- Geophysical Research Letters
-  22 October 2020
Enhanced Meiyu-Baiu Rainfall in Early Summer 2020: Aftermath of the 2019 Super IOD Event
- Geophysical Research Letters
-  10 November 2020
Record-Breaking Meiyu Rainfall Around the Yangtze River in 2020 Regulated by the Subseasonal Phase Transition of the North Atlantic Oscillation
- Geophysical Research Letters
-  16 November 2020
On the Covariation of Chlorophyll Fluorescence and Photosynthesis Across Scales
- Geophysical Research Letters
-  23 November 2020
Increase in Compound Drought and Heatwaves in a Warming World
- Geophysical Research Letters
-  8 December 2020
Hydrogen Wettability of Sandstone Reservoirs: Implications for Hydrogen Geo-Storage
- Geophysical Research Letters
-  11 December 2020
Observed Impacts of COVID-19 on Urban CO2 Emissions
- Geophysical Research Letters
-  30 October 2020
Variation in Concentration and Sources of Black Carbon in a Megacity of China During the COVID-19 Pandemic
- Geophysical Research Letters
-  16 November 2020
Relativistic Electron Microbursts as High-Energy Tail of Pulsating Aurora Electrons
- Geophysical Research Letters
-  13 October 2020
Impacts of Traffic Reductions Associated With COVID-19 on Southern California Air Quality
- Geophysical Research Letters
-  23 November 2020
Future Hurricanes Will Increase Palm Abundance and Decrease Aboveground Biomass in a Tropical Forest
- Geophysical Research Letters
-  1 October 2022
Multidecadal Regime Shifts in North Pacific Subtropical Mode Water Formation in a Coupled Atmosphere-Ocean-Sea Ice Model
- Geophysical Research Letters
-  1 October 2022
Evaluation of Extreme Soil Moisture Conditions During the 2020 Sahel Floods and Implications for Disease Outbreaks
- Geophysical Research Letters
-  1 October 2022
Atmosphere-Snow Exchange Explains Surface Snow Isotope Variability
- Geophysical Research Letters
-  1 October 2022
Contrasting Climatic Trends of Atmospheric River Occurrences Over East Asia
- Geophysical Research Letters
-  1 October 2022
Predicting Antarctic net snow accumulation at the kilometer scale and its impact on observed height changes
- Geophysical Research Letters
-  27 September 2022
The Unprecedented Character of California's 20th Century Enhanced Hydroclimatic Variability in a 600-Year Context
- Geophysical Research Letters
-  1 October 2022
Greenland Interannual Ice Mass Variations Detected by GRACE Time-Variable Gravity
- Geophysical Research Letters
-  29 September 2022
Recognizing the Role of Tropical Seaways in Modulating the Pacific Circulation
- Geophysical Research Letters
-  29 September 2022
Near-Cloud Aerosol Retrieval Using Machine Learning Techniques, and Implied Direct Radiative Effects
- Geophysical Research Letters
-  1 October 2022