Monday, July 22, 2024

The PO.DAAC is pleased to announce the public release of the Cross-Calibrated Multi-Platform Winds Level 4 Version 3.1 datasets produced by Remote Sensing Systems (RSS). CCMP produces gridded products that provide a consistent, gap-free time-series of vector winds over the world's oceans from 1993 onward. It combines ocean surface 10m wind retrievals from multiple types of satellite microwave sensors (most of the wind-sensing U.S., Japanese, and European satellites flown to date) with a background field from reanalysis (ERA5). After a hiatus, the updated version of these collections are returning to PO.DAAC. The previous version hosted at PO.DAAC was funded under the Making Earth System Data Records for Use in Research Environments (MEaSUREs) project. The most recent version here is produced under an Ocean Vector Winds Science Team grant (ROSES proposal 17-OVWST-17-0023). More information regarding the CCMP project is available on RSS’s webpage at https://www.remss.com/measurements/ccmp/ and also via PO.DAAC’s designated project page.

Several enhancements over the previous V2.0 release are implemented including:

  • Use of a more up-to-date and regularly updated reanalysis product for the background wind field. ERA5 was chosen because it is available hourly, facilitating a future enhancement to CCMP for higher frequency analysis.
  • Improved performance and agreement with satellite winds at high wind speed.
  • Minimized spurious trends caused by the interaction between the amount of satellite measurements available and the satellite/model biases. 
  • Version 3.1 further improves over version 3.0 by improving the quality of the wind after 2012, see their webpage for details.

Datasets comprising this release include 6-hourly and monthly-mean products, spanning 1993 onward. Both are Level 4, near global coverage (between 80° N/S latitude) at 0.25° resolution. Data are produced in netCDF format. The time record will be added onto as files become available (roughly three month latency).

The RSS CCMP Winds Level 4 Version 3.1 datasets are described and discoverable via the PO.DAAC data portal, specifically

Several animations from CCMP winds (wind vectors overlain on sea surface temperature) are available on PO.DAAC’s CCMP project page from the previous version of CCMP. The animations are from previous versions but are still relevant for a first look at CCMP products.

DOI:

Citation:

Mears, C.; Lee, T.; Ricciardulli, L.; Wang, X.; Wentz, F. 2022. Improving the Accuracy of the Cross-Calibrated Multi-Platform (CCMP) Ocean Vector Winds, Remote Sens., 14, 17. https://doi.org/10.3390/rs14174230

Atlas, R., Hoffman, R. N., Ardizzone, J., Leidner, S. M., Jusem, J. C., Smith, D. K., & Gombos, D. 2011. A cross-calibrated, multiplatform ocean surface wind velocity product for meteorological and oceanographic applications, Bull. Amer. Meteor. Soc., 92, 2. https://doi.org/10.1175/2010BAMS2946.1

Comments/Questions? Please contact podaac@podaac.jpl.nasa.gov or visit the PO.DAAC on Earthdata Forum.