Name	JAMSTEC/CEIST
Address	3173-25, Showa-machi, Kanazawa-ku, Yokohama-city, Kanagawa, 236-0001, Japan
E-mail	fora_req@jamstec.go.jp

Four-dimensional Variational Ocean ReAnalysis for the Western North Pacific (FORA-WNP30) is the first-ever dataset covering the western North Pacific over the last three decades (1982-2014) at eddy-resolving resolution. This is the cooperative work of Japan Agency for Marine-Earth Science and Technology (JAMSTEC) and Meteorological Research Institude, Japan Meteorological Agency (JMA/MRI) using the Earth Simulator.

FORA-WNP30 was produced by using MRI Multivariate Ocean Variational Estimation system, version of 4-dimensional variational method (MOVE-4DVAR; Usui et al. 2015), the data assimilation system developed by the JMA/MRI. MOVE-4DVAR uses MRI.COM-WNP (Tsujino et al. 2006), eddy-resolving ocean model for Western North Pacific developed by JMA/MRI, as the forward model of ocean and sea ice.

The settings of the assimilation system are as follows:

- Ocean and sea ice model

* Domain: 117°E-160°W, 15°N-65°N

* Horizontal resolution: 1/10° (1/6° east of 160°E) longitude × 1/10° (1/6° north of 50°N) latitude

* Number of vertical levels: 54 levels (0-6300m)

- Assimilation method

* Ocean: 4-dimensional variational method

* Sea ice: objective analysis by minimum variance estimation and nudging

* Assimilation cycle: 3 cycles in a month (day 1 to 10, 11 to 20, 21 to the end of month in each month), sea ice is nudeged to the daily analysis.

- Assimilated observation

* In situ temperature and salinity profiles from WOD2013 and GTSPP (0-1500m)

* Gridded SST made by merging satellite and in situ observations (MGDSST; Kurihara et al., 2006 [in Japanese])

* SLA by satellites (TOPEX/Poseidon, Jason-1/2, ERS-1/2, Envisat, GFO, Cryosat)

* SSM/I sea ice concentration data

- Atmospheric forcing

* daily-mean of JRA-55 (Kobayashi et al., 2015)

- Analysis period

* Jan. 1, 1982 to Dec. 31, 2014

Begin Date	1982-01-01
End Date	2014-12-31
Temporal Characteristics	Daily

North bound latitude	65
West bound longitude	116.8
Eastbound longitude	200.25
South bound latitude	14.8

Dimension Name	Dimension Size (slice number of the dimension)	Resolution Unit
row	673	6 (minute)
column	442	6 (minute)
vertical	54	(m)

name	version	specification
netCDF	1.0	CF-1.6

1. The dataset is available for free for scientific and educational purposes. If you wish to use the dataset for non-scientific or non-educational purposes, please inform us in advance and follow our instructions.

2. The source of the dataset should be accordingly acknowledged and the article below should also be referred in scientific or technical papers, publications, press releases or other communications regarding the dataset.

Usui et al., 2016, Four-dimensional Variational Ocean Reanalysis: A 30-year high-resolution dataset in the western North Pacific (FORA-WNP30). J. Oceanogr., submitted.

3. Users should provide JAMSTEC/CEIST a copy or URI of their scientific or technical papers, publications, press releases or other communications regarding the dataset.

4. Users are not permitted to redistribute, deliver, or sell the dataset to public.

[Constraints and Disclaimer] 1. The copyright and intellectual property right of the dataset belong to JAMSTEC and JMA/MRI. Please note that although JAMSTEC and JMA/MRI have paid the close attention to produce the dataset, JAMSTEC and JMA/MRI assume no responsibility regarding the reliability of the dataset.

[Constraints and Disclaimer] 2. JAMSTEC and JMA/MRI are not responsible to users for any damage that may be caused by the use of the dataset.

This study utilized the dataset ‘Four-dimensional Variational Ocean Reanalysis for the western North Pacific’ (FORA-WNP30), which was produced by Japan Agency for Marine-Science and Technology (JAMSTEC) and Meteorological Research Institute of Japan Meteorological Agency (JMA/MRI).