Impact of swell on simulations using a regional atmospheric climate model

Carlsson, BjÃ¶rn; Rutgersson, Anna; Smedman, Ann‐Sofi

doi:10.3402/tellusa.v61i4.15611

Cited by 2 publications

(5 citation statements)

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“…2]. When the impact of wave age on the Charnock coefficient (using Carlsson et al, 2009) is also introduced, the results (Fig. 2b) indicate that the drag THE IMPACT OF WAVES AND SEA SPRAYcoefficient will decrease with increasing wave age.…”

Section: Improved Wind Stress Parameterisation From Comparing the Usmentioning

confidence: 87%

“…In the present study, a new wind stress parameterisation is proposed based on the parameterisation of Kudryavtsev and Makin (2011) and Kudryavtsev et al (2012). The wavestate-dependent SSGF and wave-agedependent Charnock coefficient (Carlsson et al, 2009) are introduced into the proposed wind stress parameterisation. The wind stress parameterisations and heat flux parameterisations at high wind speeds are applied to an atmosphereÁ wave coupled model to simulate several storm cases for the comparison of the wind stress parameterisations and their co-impact with the sea spray influence on the development of storms.…”

Section: Discussionmentioning

confidence: 99%

“…Kumar et al, 2009) have recognised that the Charnock coefficient can be influenced by the wave state information, significant effort has been made to relate it to wave age. To investigate its influences under high wind speed conditions, we introduced the waveage-dependent Charnock coefficient for the windÁsea condition from Carlsson et al (2009) into the parameterisation in eq. (5),…”

Section: Improved Wind Stress Parameterisation From Comparing the Usmentioning

confidence: 99%

“…With increased numbers of measurements, many studies (i.e. Drennan et al, 2005;Hwang, 2005;Carlsson et al, 2009) have found that the Charnock coefficient not only is related to friction velocity but also depends on the sea state. The Charnock coefficient is commonly treated as a function of wave age (i.e.…”

Section: Introductionmentioning

confidence: 99%

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The impact of waves and sea spray on modelling storm track and development

Wu¹,

Rutgersson²,

Larsén³

2015

Tellus A: Dynamic Meteorology and Oceanography

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A B S T R A C TIn high wind speed conditions, sea spray generated by intensely breaking waves greatly influences the wind stress and heat fluxes. Measurements indicate that the drag coefficient decreases at high wind speeds. The sea spray generation function (SSGF), an important term of wind stress parameterisation at high wind speeds, is usually treated as a function of wind speed/friction velocity. In this study, we introduce a wave-state-dependent SSGF and wave-age-dependent Charnock number into a high wind speedÁwind stress parameterisation. The newly proposed wind stress parameterisation and sea spray heat flux parameterisation were applied to an atmosphereÁwave coupled model to study the mid-latitude storm development of six storm cases. Compared with measurements from the FINO1 platform in the North Sea, the new wind stress parameterisation can reduce wind speed simulation errors in the high wind speed range. Considering only sea spray impact on wind stress (and not on heat fluxes) will intensify the storms (in terms of minimum sea level pressure and maximum wind speed), but has little effect on the storm tracks. Considering the impact of sea spray on heat fluxes only (not on wind stress) can improve the model performance regarding air temperature, but it has little effect on the storm intensity and storm track performance. If the impact of sea spray on both the wind stress and heat fluxes is taken into account, the model performs best in all experiments for minimum sea level pressure, maximum wind speed and air temperature.

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Section: Improved Wind Stress Parameterisation From Comparing the Usmentioning

confidence: 87%

Section: Discussionmentioning

confidence: 99%

Section: Improved Wind Stress Parameterisation From Comparing the Usmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The impact of waves and sea spray on modelling storm track and development

Wu¹,

Rutgersson²,

Larsén³

2015

Tellus A: Dynamic Meteorology and Oceanography

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“…where the Charnock coefficient, α, is a constant or described as a function of the state of the waves, where younger waves are expected to give a rougher surface (Fairall et al 2003;Drennan et al 2003;Carlsson et al 2009). For temperature and scalars it is more complicated (Garratt 1992).…”

Section: Atmospheric Processesmentioning

confidence: 99%

Transfer Across the Air-Sea Interface

Garbe

Rutgersson

Boutin

et al. 2013

Springer Earth System Sciences

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The efficiency of transfer of gases and particles across the air-sea interface is controlled by several physical, biological and chemical processes in the atmosphere and water which are described here (including waves, large-and small-scale turbulence, bubbles, sea spray, rain and surface films). For a deeper understanding of relevant transport mechanisms, several models have been developed, ranging from conceptual models to numerical models. Most frequently the transfer is described by various functional dependencies of the wind speed, but more detailed descriptions need additional information. The study of gas transfer mechanisms uses a variety of experimental methods ranging from laboratory studies to carbon budgets, mass balance methods, micrometeorological techniques and thermographic techniques. Different methods resolve the transfer at different scales of time and space; this is important to take into account when comparing different results. Air-sea transfer is relevant in a wide range of applications, for example, local and regional fluxes, global models, remote sensing and computations of global inventories. The sensitivity of global models to the description of transfer velocity is limited; it is however likely that the formulations are more important when the resolution increases and other processes in models are improved. For global flux estimates using inventories or remote sensing products the accuracy of the transfer formulation as well as the accuracy of the wind field is crucial. IntroductionThe transfer of gases and particles across the air-sea interface depends not only on the concentration difference between the water and the air, but also on the efficiency of the transfer process. The efficiency of the transfer is controlled by complex interaction of a variety of processes in the air and in the water near the interface. Here we treat both gases and particles since the transfer, to some extent, is governed by similar mechanisms. Studies of transfer across the air-sea interface include a variety of methods and techniques ranging from laboratory studies, modeling and large-scale field studies. Various methods reach somewhat different conclusions, due to representation of different

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Impact of swell on simulations using a regional atmospheric climate model

Cited by 2 publications

References 0 publications

The impact of waves and sea spray on modelling storm track and development

The impact of waves and sea spray on modelling storm track and development

Transfer Across the Air-Sea Interface

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