ATMOSPHERIC SCIENCE

Open Access

Large Ensemble Simulation for Investigating Predictability of Precursor Vortices of Typhoon Faxai in 2019 With a 14‐km Mesh Global Nonhydrostatic Atmospheric Model

Yohei Yamada,?Tomoki Miyakawa,?Masuo Nakano,?Chihiro Kodama,?Akiyoshi Wada,?Tomoe Nasuno,?Ying-Wen Chen,?Akira Yamazaki,?Hisashi Yashiro,?Masaki Satoh

e2022GL100565 | First Published: 23 November 2022

Key Points

• A 1,600-member ensemble simulation in total for Typhoon Faxai (2019) was performed using a 14-km mesh nonhydrostatic atmospheric model

• The model successfully predicts the risk of Faxai's landfall in Japan 2?weeks in advance

• Reproducibilities of the precursor vortex and upper-tropospheric vortex yield good prediction of the formation and track of Faxai

CLIMATE

Colder Eastern Equatorial Pacific and Stronger Walker Circulation in the Early 21st Century: Separating the Forced Response to Global Warming From Natural Variability

e2022GL101020 | First Published: 20 January 2023

Key Points

• A multi-decadal strengthening of the Pacific Walker cell is observed in a wide range of indices, especially after 1990

• A Northern Hemisphere - Indo West Pacific warming sea surface temperature pattern, which differs from the Pacific Decadal Oscillation, is evident since 1980

• This?pattern resembles a forced response to abrupt CO2?forcing, emerging?in a subset of climate models, and contributes to the Walker circulation strenthening

CLIMATE

OCEANS

Open Access

Resonant Diurnal Internal Tides in the North Atlantic: 2. Modeling

e2022GL101193 | First Published: 17 January 2023

Key Points

• Past interpretations that signals in acoustic data were caused by standing-wave, diurnal internal tides are supported by an ocean model

• The historical acoustic data can be used to predict model internal-tide variability much like ordinary tide prediction

• The acoustical observations provide a quantitative benchmark for improved model representation of tides, internal tides, and dissipation

Open Access

Spurious Indo‐Pacific Connections to Internal Atlantic Multidecadal Variability Introduced by the Global Temperature Residual Method

Clara Deser,?Adam S. Phillips

e2022GL100574 | First Published: 24 January 2023

Key Points

• A common method for isolating the internal component of Atlantic Multidecadal Variability is to remove fluctuations associated with global-mean temperature

• This method introduces spurious Indo-Pacific connections in model Large Ensembles and observations due to internal variations in global-mean temperature

• A revised method based on removing fluctuations associated with the forced component of global-mean temperature mitigates this issue

ATMOSPHERIC SCIENCE

Open Access

Large‐Eddy Simulation of Sea Spray Impacts on Fluxes in the High‐Wind Boundary Layer

David H. Richter,?Charlotte E. Wainwright

e2022GL101862 | First Published: 24 January 2023

Key Points

• When sea spray is injected at a realistic rate it does not affect the drag coefficient,?CD, up to 48?m?s?1

• High spray production quickly saturates the surface layer, which limits the impact of spray on fluxes and air-sea flux coefficients

• Very little change in the thermodynamic flux coefficients are at wind speeds beyond 36?m?s?1?if the surface layer saturates

Open Access

Can Biomass Burning Aerosol Induced Surface Cooling Be Amplified Through Sea Surface Temperature‐Cloud Feedback Over the Southeast Atlantic?

Zheng Lu,?Xiaohong Liu

e2022GL101377 | First Published: 24 January 2023

Key Points

• Sea surface temperature-low cloud feedback reduces the magnitude of the cloud radiative effect (CRE) caused by the BB aerosols over Southeast Atlantic

• Weaker CRE is due to stronger sea breeze and less moisture supply from the ocean

• The excess heat transport associated with counterclockwise rotation of ocean circulation anomalies stops the amplification of CRE