CAWCR wave hindcast extension Jan 2011 - May 2013

Ocean wave hindcast, using the WaveWatch III v4.08 wave model forced with NCEP CFSv2 hourly winds and daily sea ice, January 2011 - May 2013. The dataset contains spectral wave output at 3683 points, as well as gridded outputs on a global 0.4 degree (24 arcminute) grid, with nested Australian and western Pacific subgrids of 10 and 4 arcminutes resolution. For further information, see Durrant et al (in prep)**. See DAP entry http://dx.doi.org/10.4225/08/523168703DCC5 for 1979-2010 data.Please note that the licensee/user is required to acknowledge the source of this data on the following terms: 'Source: Bureau of Meteorology and CSIRO © 2013'. Apart from dealings under the Copyright Act 1968, the licensee shall not reproduce (electronically or otherwise), modify or supply (by sale or otherwise) this data without written permission. Please contact us for more information.Lineage: The hindcast was performed using the WAVEWATCH III(TM) model version 4.08. The model was run on a 0.4 x 0.4° global grid with a series of nested grids of 10 arcminutes (~18km) down to 4 arcminutes (~7km) in the Western Pacific and Australian regions. Wave spectra were discretised over 29 frequencies exponentially spaced from 0.038 Hz to 0.5 Hz and 24 directions with a constant 15° directional resolution. All grids were forced with Climate Forecast System Reanalysis v.2 (CFSv2) surface winds at 0.2° spatial and hourly temporal resolution. Hourly sea ice concentrations from the CFSv2 data set were also used to define the ice edge. Data output in NetCDF4 format.CAWCR Wave Hindcast pre-June 2013 ERRATAIssued 21/09/2020.Wave data pre-June 2013 was created with an early release of WAVEWATCHIII (v4.08).Note that pre-June 2013 variable 't' should not be used.Pre-June 2013, Variable ‘t’, named mean wave period using the first spectral moment is a duplicate of variable ‘tm0m1’ mean wave period using the first inverse spectral moment.Post-June 2013 (inclusive), Variables ‘t01’ represent mean wave period using the first spectral moment, and ‘t0m1’ represents mean wave period using the first inverse spectral moment with no issues.Several other variable names changes took place during the upgrade.

本数据集为2011年1月至2013年5月的海浪后报结果，采用WaveWatch III v4.08海浪模式（WaveWatch III v4.08），以美国国家环境预报中心（National Centers for Environmental Prediction, NCEP）CFSv2逐小时风场与逐日海冰数据作为强迫场完成计算。

本数据集包含3683个测点的频谱海浪输出结果，以及全球0.4°（24角分）网格的网格化输出产品，同时嵌套了分辨率为10角分与4角分的澳大利亚及西太平洋子网格。更多详细信息可参阅Durrant等人（待刊）的研究**。1979-2010年的相关数据可查看DAP条目：http://dx.doi.org/10.4225/08/523168703DCC5。

请注意，数据被许可方/使用者需遵循以下要求注明数据来源："Source: 澳大利亚气象局（Bureau of Meteorology）与联邦科学与工业研究组织（CSIRO）© 2013"。除符合1968年《版权法》的相关使用行为外，未经书面许可，数据被许可方不得通过电子或其他方式复制、修改该数据，亦不得通过售卖或其他形式分发该数据。如需更多信息，请联系我们。

数据谱系说明：本次后报采用WAVEWATCH III(TM) 4.08版本模式完成。模式基于0.4°×0.4°的全球网格运行，并在西太平洋与澳大利亚区域嵌套了一系列分辨率从10角分（约18公里）至4角分（约7公里）的子网格。海浪频谱在0.038 Hz至0.5 Hz的区间内以指数间隔划分为29个频率段，并以15°的固定方向分辨率划分为24个方向扇区。所有网格均采用空间分辨率0.2°、时间分辨率逐小时的气候预报系统再分析第二版（Climate Forecast System Reanalysis v.2, CFSv2）地表风场作为强迫场，同时使用CFSv2数据集的逐小时海冰浓度数据划定海冰边缘。数据输出格式为NetCDF4格式。

CAWCR 2013年6月前海浪后报数据勘误表 发布于2020年9月21日。2013年6月前的海浪数据采用早期发布的WAVEWATCH III（v4.08）版本生成。请注意，2013年6月前的变量“t”不得使用：该变量本应命名为基于一阶频谱矩的平均波周期，但其与变量“tm0m1”（基于一阶逆频谱矩的平均波周期）重复。2013年6月及之后的版本中，变量“t01”代表基于一阶频谱矩的平均波周期，“t0m1”代表基于一阶逆频谱矩的平均波周期，无上述问题。本次模式升级过程中还对其他若干变量名称进行了调整。