117 Hits in 4.8 sec

Altimeter Estimation of Sea Surface Wind Stress for Light to Moderate Winds

Douglas Vandemark, James B. Edson, Bertrand Chapron
1997 Journal of Atmospheric and Oceanic Technology  
An altimeter friction velocity algorithm is derived based on the wind speed model and an open-ocean drag coefficient.  ...  Aircraft altimeter and in situ measurements are used to examine relationships between altimeter backscatter and the magnitude of near-surface wind and friction velocities.  ...  Karachintsev, and G. Young for their help in collecting the Iselin data, and T. Donato, J. Kaiser, G. Mormorino, and C. Trump for their help in collecting the Bartlett data. We also thank D.  ... 
doi:10.1175/1520-0426(1997)014<0716:aeossw>;2 fatcat:2mkogtfwnndphaw6bdvqutp5ei

Swell and Wind-Sea Distributions over the Mid-Latitude and Tropical North Atlantic for the Period 2002–2008

Eduardo G. G. de Farias, João A. Lorenzzetti, Bertrand Chapron
2012 International Journal of Oceanography  
We present an analysis of wind-sea and swell fields for mid-latitude and tropical Atlantic for the period 2002–2008 using a combination of satellite data (altimeter significant wave height and scatterometer  ...  surface winds) and model results (spectrum peak wave period and propagation direction).  ...  It is now well established that the drag coefficient C D , needed for calculating the wind stress and momentum fluxes, is dependent on wave height or wave age [2] .  ... 
doi:10.1155/2012/306723 fatcat:hlcyaqsn3zf7teuqos7jsv72bq

Cyclonic Wave Simulations Based on WAVEWATCH-III Using a Sea Surface Drag Coefficient Derived from CFOSAT SWIM Data

Weizeng Shao, Tao Jiang, Yu Zhang, Jian Shi, Weili Wang
2021 Atmosphere  
In particular, a parameterization of the drag coefficient derived from sea surface roughness is adopted by considering the terms for wave steepness and wave age from the measurements from SWIM products  ...  The analysis results indicated that the proposed parameterization of the drag coefficient significantly improved the accuracy of typhoon wave estimation (a 0.49 m root mean square error (RMSE) of Hs and  ...  The authors also thank the European Centre for Medium-Range Weather Forecasts (ECMWF) for providing interim wind data at 0.5 • grids that can be openly downloaded from (accessed on  ... 
doi:10.3390/atmos12121610 fatcat:oiqflz3k6bcunowtxics4brhyy

Improving Regional Model Skills During Typhoon Events: A Case Study for Super Typhoon Lingling Over the Northwest Pacific Ocean

Delei Li, Joanna Staneva, Jean-Raymond Bidlot, Sebastian Grayek, Yuchao Zhu, Baoshu Yin
2021 Frontiers in Marine Science  
The active two-way coupling between the atmosphere and ocean waves model is enabled through the introduction of sea state-dependent surface drag into the CCLM and updated winds into the WAM.  ...  In this study, the impact of reducing surface drag at high wind speeds on modeling wind and wave conditions during the super Typhoon Lingling event over the northwest Pacific Ocean in 2019 is investigated  ...  Over the past decades, many parameterization schemes of sea surface roughness length and drag coefficient have been developed through wind and/or wave parameters such as 10 m wind speed, wave steepness  ... 
doi:10.3389/fmars.2021.613913 fatcat:fosv5yjwgnht5po3mlhralfa24

Ocean Wind Fields from Satellite Active Microwave Sensors [chapter]

S. Zecchetto
2010 Geoscience and Remote Sensing New Achievements  
of CO 2 by the sea due to the wind and the breaking waves.  ...  Its assessment is of paramount importance in the evaluation of the wind stress τ = C d (T a , T s , T d ) · |U| 2 , (the drag coefficient C d is a function depending, in a first approximation, on the air  ...  Acknowledgments Scatterometer QuikSCAT data have been downloaded from the Physical Oceanography Distributed Active Archive Center (PODAAC) of the Jet Propulsion Laboratory, Pasadena, USA.  ... 
doi:10.5772/9111 fatcat:4sqssss6drb7jpdyk3x3m5mauu

Reduced drag coefficient for high wind speeds in tropical cyclones

Mark D. Powell, Peter J. Vickery, Timothy A. Reinhold
2003 Nature  
The transfer of momentum between the atmosphere and the ocean is described in terms of the variation of wind speed with height and a drag coefficient that increases with sea surface roughness and wind  ...  , waves and storm surges.  ...  The drag coefficient was computed from equation (2) . Values of U * , Z 0 and C d for four estimates of surface layer depth are shown in Fig. 3 .  ... 
doi:10.1038/nature01481 pmid:12646913 fatcat:eat5czzumffizoozwjsnfkitde

Wind Fields over the Great Lakes Measured by the SeaWinds Scatterometer on the QuikSCAT Satellite

Son V. Nghiem, George A. Leshkevich, Bryan W. Stiles
2004 Journal of Great Lakes research  
of interpolated and gridded wind fields for hydrodynamic circulation and wave prediction models.  ...  Moreover, we show that wind fields derived from satellite scatterometer data before, during, and after a large storm in October 1999, with winds stronger than 50 knots, can monitor the storm development  ...  The research carried out by the Great Lakes Environmental Research Laboratory was supported by the National Oceanic and Atmospheric Administration. Technical discussions and comments from Dr.  ... 
doi:10.1016/s0380-1330(04)70337-8 fatcat:gwl4iyd2mrdtldxlfw7lhmen44

Global average of air‐sea CO2transfer velocity from QuikSCAT scatterometer wind speeds

J. Boutin, Y. Quilfen, L. Merlivat, J. F. Piolle
2009 Journal of Geophysical Research  
This allows us to estimate the global distributions of k computed using k-U relationships and temperature-dependent Schmidt numbers from 1999 to 2006.  ...  Meanwhile, quality and sampling of satellite wind speeds has greatly improved. The QuikSCAT scatterometer has provided high-quality wind speeds for more than 7 years.  ...  Although large uncertainties remain in Cd because it depends on parameters other than wind speeds, this value appears larger than Cd estimated using wave-age or wave-steepness formula in wind sea conditions  ... 
doi:10.1029/2007jc004168 fatcat:wdi42q6mzvf7tcqgtsgmlwna7e

Microwave Emission and Scattering from Ocean Surface Waves in the Southern Beaufort Sea

Mukesh Gupta, Randall K. Scharien, David G. Barber
2014 International Journal of Oceanography  
Microwave emission and backscatter are shown to be sensitive to the ocean surface physical roughness as defined by the significant wave height Hm0, compared to wind speed.  ...  Estimates of the relationships between geophysical variables and microwave backscatter/emission are important for the evaluation of atmosphere-ocean interaction, as well as energy, and mass transfer across  ...  the drag and total wind stress.  ... 
doi:10.1155/2014/872342 fatcat:slkovv7cxrgffnk3j7loxma5xy

Characterizing Buoy Wind Speed Error in High Winds and Varying Sea State with ASCAT and ERA5

Ethan E. Wright, Mark A. Bourassa, Ad Stoffelen, Jean-Raymond Bidlot
2021 Remote Sensing  
We concluded that wave sheltering is not significantly affecting the winds from buoys between 4 and 5 m with high confidence for winds under 18 ms−1.  ...  Using TC calibration of buoy U10s to ASCAT in pure wind-wave conditions, we found that there was a small, but statistically significant difference between height adjusted buoy winds from buoys with 4 and  ...  Acknowledgments: We thank Jocelyn Elya for her help with the scatterometer collocations and Marcos Portabella for his guidance with respect to the triple collocation process.  ... 
doi:10.3390/rs13224558 fatcat:cct5fjxc2vfznodkug3wseg4fy

Asymmetry and Anisotropy of Microwave Backscatter at Low Incidence Angles

Xiaoqing Chu, Yijun He, Gengxin Chen
2012 IEEE Transactions on Geoscience and Remote Sensing  
His research interests include ocean waves, sea-surface wind speed, and other ocean-surface features related to remote sensing by full polarization synthetic aperture radar and other microwave radar at  ...  low incidence angle, air-sea gas exchange using microwave remote sensing and numerical models, and sea-surface scattering of electromagnetic waves.  ...  ACKNOWLEDGMENT The authors would like to acknowledge the Goddard Earth Sciences Data and Information Services Center for the straightforward and rapid electronic access to the TRMM PR data, and thank the  ... 
doi:10.1109/tgrs.2012.2189010 fatcat:pjcxukxjsbc7fgrjafojchwwey

Comparison of 10-m Wind Forecasts from a Regional Area Model and QuikSCAT Scatterometer Wind Observations over the Mediterranean Sea

Christophe Accadia, Stefano Zecchetto, Alfredo Lavagnini, Antonio Speranza
2007 Monthly Weather Review  
Also, a wind direction bias (scatterometer minus model) generally between 5°and 15°exists.  ...  In open-sea regions the model underestimates wind strength from about 0.5 m s Ϫ1 in spring and summer to 1.0 m s Ϫ1 in winter, as evidenced by the existing biases against scatterometer data.  ...  Suggestions and comments made by two anonymous reviewers substantially helped to improve this paper. The satellite data have been downloaded from the Web site http://  ... 
doi:10.1175/mwr3370.1 fatcat:nmaw4kk7zbf7dc7d5gcorlal3y

Statistical Characterization of Zonal and Meridional Ocean Wind Stress

Sarah T. Gille
2005 Journal of Atmospheric and Oceanic Technology  
Raw swath wind stresses derived from the Quick Scatterometer (QuikSCAT) are compared with five different global gridded wind products, including products based on scatterometer observations, meteorological  ...  In the frequency range between 10 and 90 cpy that is resolved by the scatterometer, spectra derived from swath data are flatter than spectra from gridded products and are judged to be flatter than Ϫ2/3  ...  The drag coefficient C d found by Yelland et al. (1998) is used for winds between 6 and 26 m s Ϫ1 , and the coefficient of Yelland and Taylor (1996) for winds between 3 and 6 m s Ϫ1 .  ... 
doi:10.1175/jtech1789.1 fatcat:rux4oacw6bbljdirz6mt4gsaoq

Atmospheric storm surge modeling methodology along the French (Atlantic and English Channel) coast

Héloïse Muller, Lucia Pineau-Guillou, Déborah Idier, Fabrice Ardhuin
2014 Ocean Dynamics  
coefficient formulations.  ...  The paper focuses on (1) sea surface drag parameterization and (2) uncertainties induced by the meteorological data quality.  ...  Charnock coefficients were provided by IFREMER IOWAGA project ( The authors would like to thank Y. Krien, J. Thiébot, and F.  ... 
doi:10.1007/s10236-014-0771-0 fatcat:v54f3crydzdrvj7nrzpq462e5q

Integrated Observations of Global Surface Winds, Currents, and Waves: Requirements and Challenges for the Next Decade

Ana B. Villas Bôas, Fabrice Ardhuin, Alex Ayet, Mark A. Bourassa, Peter Brandt, Betrand Chapron, Bruce D. Cornuelle, J. T. Farrar, Melanie R. Fewings, Baylor Fox-Kemper, Sarah T. Gille, Christine Gommenginger (+14 others)
2019 Frontiers in Marine Science  
wind vector, and directional wave spectrum from Doppler satellite sensors.  ...  surface velocity and directional wave spectrum at global scales.  ...  Delaware); and Steve Morey (U. Miami) for helpful comments and suggestions.  ... 
doi:10.3389/fmars.2019.00425 fatcat:byow2vu7snbx3orzoe573epiqu
« Previous Showing results 1 — 15 out of 117 results