Sensible Heat Fluxes in the Nearly Neutral Boundary Layer: The Impact of Frictional Heating within the Surface Layer

Edwards, John M.

doi:10.1175/jas-d-18-0158.1

Cited by 3 publications

(1 citation statement)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, the hypothesis of Bister and Emanuel (BE) that all the work done by friction is converted into dissipative heating within the boundary layer is likely unreasonable, and the magnitude of DH within the atmospheric boundary layer tended to be overestimated. In addition, the inclusion of DH tends to make the surface sensible heat flux less positive, which results in a subtle reduction of maximum wind velocity of TCs (Edwards, 2019).…”

Section: Introductionmentioning

confidence: 99%

Estimation of Dissipative Heating Properties Above the Internal Boundary Layer in Landfalling Typhoons Using Multi-Layer Tower Observations

Zhou

Tang

2022

Front. Earth Sci.

View full text Add to dashboard Cite

Wind observations from a multi-level observation tower are used to estimate the dissipative heating (DH) in three landfalling typhoons. The observations reveal the presence of a stress internal boundary layer (IBL) in the typhoon circulations. The integrated DH values increase with increasing wind speed above the IBL. The integrated DH calculated with the turbulent spectra method increases more rapidly with increasing wind speed than that estimated with the theoretical method. However, the integrated DH estimated using the theoretical method is significantly smaller than that calculated with the turbulent spectra method because dissipative rates with the turbulent spectra method are much larger above the IBL.

show abstract

Section: Introductionmentioning

confidence: 99%

Estimation of Dissipative Heating Properties Above the Internal Boundary Layer in Landfalling Typhoons Using Multi-Layer Tower Observations

Zhou

Tang

2022

Front. Earth Sci.

View full text Add to dashboard Cite

show abstract

Contribution of Dissipative Heating to the Intensity Dependence of Tropical Cyclone Intensification

Wang

Tan

2022

Journal of the Atmospheric Sciences

View full text Add to dashboard Cite

Previous studies have demonstrated the contribution of dissipative heating (DH) to the maximum potential intensity (MPI) of tropical cyclones (TCs). Since DH is a function of near-surface wind speed and thus TC intensity, a natural question arises as to whether DH contributes to the intensity-dependence of TC potential intensification rate (PIR). To address this issue, an attempt has been made to include DH in a recently developed time-dependent theory of TC intensification. With this addition, the theory predicts a shift of the maximum PIR towards the higher intensity side, which is consistent with the intensity-dependence of TC intensification rate in observed strong TCs. Since the theory without DH predicts a dependence of TC PIR on the square of the MPI, the inclusion of DH results in an even higher PIR for strong TCs. Considering the projected increase in TC MPI under global warming, the theoretical work implies that as the climate continues to warm, TCs may intensify more rapidly. This may not only make the TC intensity forecasting more difficult, but also may increase the threats of TCs to the coastal populations if TCs intensify more rapidly just before they make landfall.

show abstract

Some Refinements to the Most Recent Simple Time-Dependent Theory of Tropical Cyclone Intensification and Sensitivity

Wang

Tan

2023

Journal of the Atmospheric Sciences

View full text Add to dashboard Cite

Several key issues in the simple time-dependent theories of tropical cyclone (TC) intensification developed in recent years remain, including the lacks of a closure for the pressure dependence of saturation enthalpy at sea surface temperature (SST) under the eyewall and the definition of environmental conditions, such as the boundary-layer enthalpy in TC environment and the TC outflow-layer temperature. In this study, some refinements to the most recent time-dependent theory of TC intensification have been accomplished to resolve those issues. The first is the construction of a functional relationship between the surface pressure under the eyewall and the TC intensity, which is derived using the cyclostrophic wind balance and calibrated using full-physics axisymmetric model simulations. The second is the definition of TC environment that explicitly includes the air-sea temperature difference. The third is the TC outflow-layer temperature parameterized as a linear function of SST based on global reanalysis data. With these refinements, the updated time-dependent theory becomes self-contained and can give both the intensity-dependent TC intensification rate (IR) and the maximum potential intensity (MPI) under given environmental thermodynamic conditions. It is shown that the pressure dependence of saturation enthalpy at SST can lead to an increase in the TC MPI and IR by about half of that induced by dissipative heating due to surface friction. Results also show that both MPI and IR increase with increasing SST, surface enthalpy exchange coefficient, environmental air-sea temperature difference, and decreasing environmental boundary-layer relative humidity, but the maximum IR is insensitive to surface drag coefficient.

show abstract

Sensible Heat Fluxes in the Nearly Neutral Boundary Layer: The Impact of Frictional Heating within the Surface Layer

Cited by 3 publications

References 27 publications

Estimation of Dissipative Heating Properties Above the Internal Boundary Layer in Landfalling Typhoons Using Multi-Layer Tower Observations

Estimation of Dissipative Heating Properties Above the Internal Boundary Layer in Landfalling Typhoons Using Multi-Layer Tower Observations

Contribution of Dissipative Heating to the Intensity Dependence of Tropical Cyclone Intensification

Some Refinements to the Most Recent Simple Time-Dependent Theory of Tropical Cyclone Intensification and Sensitivity

Contact Info

Product

Resources

About